WO2020226410A1 - Optical imaging system - Google Patents

Optical imaging system Download PDF

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Publication number
WO2020226410A1
WO2020226410A1 PCT/KR2020/005925 KR2020005925W WO2020226410A1 WO 2020226410 A1 WO2020226410 A1 WO 2020226410A1 KR 2020005925 W KR2020005925 W KR 2020005925W WO 2020226410 A1 WO2020226410 A1 WO 2020226410A1
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WO
WIPO (PCT)
Prior art keywords
lens
optical system
object side
aspherical surface
present
Prior art date
Application number
PCT/KR2020/005925
Other languages
French (fr)
Korean (ko)
Inventor
최진영
Original Assignee
최진영
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020190052674A external-priority patent/KR20200128616A/en
Priority claimed from KR1020200045636A external-priority patent/KR20210127868A/en
Application filed by 최진영 filed Critical 최진영
Publication of WO2020226410A1 publication Critical patent/WO2020226410A1/en

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/02—Bodies
    • G03B17/12—Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets

Definitions

  • the present invention relates to an optical system that can be mounted on a portable terminal.
  • the portable terminal includes a small camera and an imaging optical system constituting the small camera.
  • the optical system for portable terminals has large spatial constraints, so it is difficult to implement a high resolution and bright F-number.
  • the optical system for imaging a portable terminal has a large spatial limitation, it is difficult to implement an optical system for long-distance imaging.
  • an optical system including four or more lenses is used.
  • an optical system comprising a plurality of lenses is not easy to manufacture, and many defects occur during the manufacturing process.
  • an imaging optical system using a prism or a reflector is used.
  • the optical system using a prism or a reflector has a considerable length from the reflective surface of the prism or the reflector to the upper surface, it is still difficult to solve the space limitation of the portable terminal.
  • An object of the present invention is to provide an imaging optical system that is easy to manufacture while implementing a high resolution.
  • an object of the present invention is to provide an optical system capable of minimizing the height and length of a camera module.
  • the optical system according to the present invention includes a first lens having refractive power; And an image surface constituting an imaging surface of light incident by the first lens, wherein the effective diameter of the first lens is greater than the diagonal length (2Y) of the first lens, The distance to the upper surface (TTL) is 6.5 mm or less.
  • the first lens has a positive refractive power.
  • At least one of the object side and the image side of the first lens has an aspherical shape.
  • the first lens has a convex object side.
  • the optical system according to the present invention satisfies the conditional expression 0.7 ⁇ TTL/f ⁇ 1.2 (in the conditional expression, f is the focal length of the optical system).
  • the focal length f1 of the first lens satisfies the conditional expression 0.8 ⁇ f1/f ⁇ 1.1.
  • the optical system according to the present invention further includes a second lens having refractive power.
  • the radius of curvature (R2) of the image side of the first lens and the radius of curvature (R3) of the side of the object of the second lens are the conditional expression -1.0 ⁇ (R2-R3)/(R2+R3) ⁇ 1.0 is satisfied.
  • Another optical system according to the present invention includes a first lens having refractive power and a second lens having refractive power.
  • the optical system according to the present invention may satisfy the conditional expression 0.2 ⁇ TTL/f ⁇ 1.0, the conditional expression fG1/f ⁇ 2.0, and the conditional expression TTL ⁇ 6.5 mm.
  • TTL is the distance from the object side to the image surface of the lens closest to the object
  • f is the focal length of the imaging optical system
  • fG1 is the focal length of the lens group excluding the lens closest to the image surface.
  • the optical system according to the present invention is easily miniaturized and manufactured.
  • FIG. 1 is a configuration diagram of an optical system according to a first embodiment of an aspect of the present invention.
  • FIG. 2 is a block diagram of an optical system according to a second embodiment of the present invention.
  • FIG 3 is a configuration diagram of an optical system according to a third embodiment of the present invention.
  • FIG. 4 is a configuration diagram of an optical system according to a fourth embodiment of the present invention.
  • FIG. 5 is a configuration diagram of an optical system according to a fifth embodiment of the present invention.
  • FIG. 6 is a configuration diagram of an optical system according to a sixth embodiment of the present invention.
  • FIG. 7 is a configuration diagram of an optical system according to a seventh embodiment of the present invention.
  • FIG. 8 is a configuration diagram of an optical system according to an eighth embodiment of the present invention.
  • FIG. 9 is a configuration diagram of an optical system according to a first embodiment of another aspect of the present invention.
  • FIG. 10 is a configuration diagram of an optical system according to a second embodiment of another aspect of the present invention.
  • FIG. 11 is a configuration diagram of an optical system according to a third embodiment of another aspect of the present invention.
  • FIG. 12 is a configuration diagram of an optical system according to a fourth embodiment of another aspect of the present invention.
  • FIG. 13 is a configuration diagram of an optical system according to a fifth embodiment of another aspect of the present invention.
  • FIG. 14 is a configuration diagram of an optical system according to a sixth embodiment of another aspect of the present invention.
  • 15 is a configuration diagram of an optical system according to a seventh embodiment of another aspect of the present invention.
  • 16 is a configuration diagram of an optical system according to an eighth embodiment of another aspect of the present invention.
  • FIG. 17 is a configuration diagram of an optical system according to a ninth embodiment of another aspect of the present invention.
  • FIG. 18 is a configuration diagram of an optical system according to a tenth embodiment of another aspect of the present invention.
  • 19 is a rear view of a portable terminal including an optical system according to another aspect of the present invention.
  • the optical system according to the present invention is composed of three or less lenses to simplify the manufacturing process.
  • the optical system makes the effective diameter ED of the lens closest to the object side larger than the diagonal length 2Y of the image so as to implement a low f-number.
  • the optical system has a distance TTL of 6.5 mm or less from the object side to the image surface of the lens disposed closest to the object side so that it can be easily mounted on the portable terminal.
  • the imaging optical system includes one or more lenses.
  • the optical system may include a first lens having positive refractive power.
  • the optical system may include a filter for blocking infrared rays and an image sensor for forming an imaging surface.
  • optical system according to the present invention satisfies at least one of the following conditional expressions.
  • TTL is the distance from the object side to the image surface of the lens (first lens) arranged closest to the object side
  • f is the focal length of the imaging optical system
  • f1 is the focal length of the first lens
  • R2 is the first lens.
  • 1 is the radius of curvature of the image side of the lens
  • R3 is the radius of curvature of the object side of the second lens.
  • the optical system 10 includes a first lens 101, a filter 301, and an image sensor 401.
  • the first lens 101 has positive refractive power.
  • the first lens 101 has a convex object side and a convex image side.
  • the first lens 101 may be made of plastic or glass.
  • one surface of the first lens 101 may be an aspherical surface.
  • one surface of the first lens 101 does not necessarily have to be an aspherical surface.
  • the first lens 101 is made of a material having a high Abbe number.
  • the Abbe number of the first lens 101 may be 50 or more.
  • the F-number of the imaging optical system 10 according to the present embodiment is 1.06, the focal length f of the imaging optical system is 5.109 mm, the total length TTL of the imaging optical system is 5.10 mm, and the diagonal length of the image surface (2Y) ) Is 3.5 mm.
  • Table 1 shows the lens properties of the optical system in this embodiment.
  • the optical system 20 includes a first lens 102, a filter 302, and an image sensor 402.
  • the first lens 102 has positive refractive power.
  • the first lens 102 has a convex object side and a convex image side.
  • the first lens 102 may be made of plastic or glass.
  • one surface of the first lens 102 may be an aspherical surface.
  • one surface of the first lens 102 does not necessarily have to be an aspherical surface.
  • the first lens 102 is made of a material having a high Abbe number. For example, the Abbe number of the first lens 102 may be 50 or more.
  • the F-number of the imaging optical system 20 according to the present embodiment is 1.08, the focal length f of the imaging optical system is 5.198 mm, the total length TTL of the imaging optical system is 5.20 mm, and the diagonal length of the image surface (2Y) ) Is 3.5 mm.
  • Table 2 shows the lens properties of the optical system in this embodiment.
  • the optical system 30 includes a first lens 103, a filter 303, and an image sensor 403.
  • the first lens 103 has positive refractive power.
  • the first lens 103 has a convex object side and a convex image side.
  • the first lens 103 may be made of plastic or glass.
  • one surface of the first lens 103 may be an aspherical surface.
  • one surface of the first lens 103 does not necessarily have to be an aspherical surface.
  • the first lens 103 is made of a material having a high Abbe number. For example, the Abbe number of the first lens 103 may be 50 or more.
  • the F-number of the imaging optical system 30 according to the present embodiment is 1.12, the focal length f of the imaging optical system is 5.391 mm, the total length TTL of the imaging optical system is 5.40 mm, and the diagonal length of the image plane (2Y ) Is 3.5 mm.
  • Table 3 shows the lens properties of the optical system in this embodiment.
  • the optical system 40 includes a first lens 104, a filter 304, and an image sensor 404.
  • the first lens 104 has positive refractive power.
  • the first lens 104 has a convex object side and a convex image side.
  • the first lens 104 may be made of plastic or glass.
  • one surface of the first lens 104 may be an aspherical surface.
  • one surface of the first lens 104 does not necessarily have to be an aspherical surface.
  • the first lens 104 is made of a material having a high Abbe number. For example, the Abbe number of the first lens 104 may be 50 or more.
  • the F-number of the imaging optical system 40 according to the present embodiment is 1.15, the focal length f of the imaging optical system is 5.981 mm, the total length TTL of the imaging optical system is 6.00 mm, and the diagonal length of the image plane (2Y ) Is 3.5 mm.
  • Table 4 shows the lens properties of the optical system in this embodiment.
  • the optical system 50 includes a first lens 105, a second lens 206, a filter 305, and an image sensor 405.
  • the first lens 105 has positive refractive power.
  • the first lens 105 has a convex object side and a convex image side.
  • the first lens 105 may be made of plastic or glass.
  • one surface of the first lens 105 may be an aspherical surface.
  • one surface of the first lens 105 does not necessarily have to be an aspherical surface.
  • the first lens 105 is made of a material having a high Abbe number. For example, the Abbe number of the first lens 105 may be 50 or more.
  • the second lens 205 has positive refractive power.
  • the second lens 105 has a concave object side surface and a convex image side surface.
  • the second lens 205 may be made of plastic or glass.
  • one surface of the second lens 205 may be an aspherical surface.
  • one surface of the second lens 205 does not necessarily have to be an aspherical surface.
  • the second lens 205 is made of a material having a lower Abbe number than the first lens. For example, the Abbe number of the second lens 205 may be 30 or less.
  • the F-number of the imaging optical system 50 according to the present embodiment is 1.22, the focal length f of the imaging optical system is 5.84 mm, the total length TTL of the imaging optical system is 5.90 mm, and the diagonal length of the image surface (2Y) ) Is 3.5 mm.
  • Table 5 shows the lens properties of the optical system in this embodiment.
  • the first lens 106 has positive refractive power.
  • the first lens 106 has a convex object side and a convex image side.
  • the first lens 106 may be made of plastic or glass.
  • one surface of the first lens 106 may be an aspherical surface.
  • one surface of the first lens 106 does not necessarily have to be an aspherical surface.
  • the first lens 106 is made of a material having a high Abbe number. For example, the Abbe number of the first lens 106 may be 50 or more.
  • the second lens 206 has positive refractive power.
  • the second lens 106 has a concave object side and a convex image side.
  • the second lens 206 may be made of plastic or glass.
  • one surface of the second lens 206 may be an aspherical surface.
  • one surface of the second lens 206 does not necessarily have to be an aspherical surface.
  • the second lens 206 is made of a material having a lower Abbe number than the first lens. For example, the Abbe number of the second lens 206 may be 30 or less.
  • the F-number of the imaging optical system 60 according to the present embodiment is 1.17, the focal length f of the imaging optical system is 5.87 mm, the total length TTL of the imaging optical system is 5.90 mm, and the diagonal length of the image surface (2Y) ) Is 3.5 mm.
  • Table 6 shows the lens properties of the optical system in this embodiment.
  • the first lens 107 has positive refractive power.
  • the first lens 107 has a convex object side and a convex image side.
  • the first lens 107 may be made of plastic or glass.
  • one surface of the first lens 107 may be an aspherical surface.
  • one surface of the first lens 107 does not necessarily have to be an aspherical surface.
  • the first lens 107 is made of a material having a high Abbe number. For example, the Abbe number of the first lens 107 may be 50 or more.
  • the second lens 207 has negative refractive power.
  • the second lens 107 has a concave object side surface and a convex image side surface.
  • the second lens 207 may be made of plastic or glass.
  • one surface of the second lens 207 may be an aspherical surface.
  • one surface of the second lens 207 does not necessarily have to be an aspherical surface.
  • the second lens 207 is made of a material having a lower Abbe number than the first lens. For example, the Abbe number of the second lens 207 may be 30 or less.
  • the F-number of the imaging optical system 70 according to the present embodiment is 1.16, the focal length f of the imaging optical system is 5.82 mm, the total length TTL of the imaging optical system is 6.00 mm, and the diagonal length of the image surface (2Y) ) Is 3.5 mm.
  • Table 7 shows the lens properties of the optical system in this embodiment.
  • the first lens 108 has positive refractive power.
  • the first lens 108 has a convex object side and a concave image side.
  • the first lens 108 may be made of plastic or glass.
  • one surface of the first lens 108 may be an aspherical surface.
  • one surface of the first lens 108 does not necessarily have to be an aspherical surface.
  • the first lens 108 is made of a material having a high Abbe number. For example, the Abbe number of the first lens 108 may be 50 or more.
  • the second lens 208 has negative refractive power.
  • the second lens 108 has a convex object side and a concave image side.
  • the second lens 208 may be made of plastic or glass.
  • one surface of the second lens 208 may be an aspherical surface.
  • one surface of the second lens 208 does not necessarily have to be an aspherical surface.
  • the second lens 208 is made of a material having a lower Abbe number than the first lens. For example, the Abbe number of the second lens 208 may be 30 or less.
  • the F-number of the imaging optical system 80 according to the present embodiment is 1.17, the focal length f of the imaging optical system is 5.76 mm, the total length TTL of the imaging optical system is 5.60 mm, and the diagonal length of the image surface (2Y) ) Is 3.5 mm.
  • Table 8 shows the lens properties of the optical system in this embodiment.
  • the optical system according to the present invention is composed of three or less lenses to simplify the manufacturing process.
  • the optical system has a distance (TTL) of 6.5 mm or less from the object side to the image surface of the lens disposed closest to the object side so that it can be easily mounted on the portable terminal.
  • TTL may be 6.0 mm or less.
  • the imaging optical system includes one or more lenses.
  • the optical system may be composed of two or three lenses.
  • the optical system may include a filter for blocking infrared rays and an image sensor for forming an imaging surface.
  • optical system according to the present invention satisfies at least one of the following conditional expressions.
  • TTL is the distance from the object side to the image surface of the lens (first lens) arranged closest to the object (subject)
  • f is the focal length of the imaging optical system
  • fG1 is the lens group excluding the lens closest to the image surface. Is the (composite) focal length of, f1 is the focal length of the first lens, BFL is the distance from the image side of the lens disposed closest to the image surface to the image surface, and R1 is the radius of curvature of the object side of the first lens.
  • optical system according to the present invention is composed of two sheets, one or more of the following conditional expressions may be additionally satisfied.
  • optical system according to the present invention is composed of three sheets, one or more of the following conditional expressions may be additionally satisfied.
  • the optical system 100 includes a first lens 110, a second lens 120, a filter F, and an image sensor IP.
  • the first lens 110 has positive refractive power.
  • the first lens 110 has a convex object side and a convex image side.
  • the first lens 110 may be made of plastic or glass.
  • the first lens 110 may include an aspherical surface.
  • at least one of the object side and the image side of the first lens 110 may be an aspherical surface.
  • one surface of the first lens 110 does not necessarily have to be an aspherical surface.
  • the second lens 120 has positive refractive power.
  • the second lens 120 has a convex object side and a convex image side.
  • the second lens 120 may be made of plastic or glass.
  • the second lens 120 may include an aspherical surface.
  • at least one of the object side and the image side of the second lens 120 may be an aspherical surface.
  • one surface of the second lens 120 does not necessarily have to be an aspherical surface.
  • the focal length f of the optical system according to the present embodiment is 6.87 mm
  • the total length TTL of the optical system is 6.30 mm
  • the height of the image surface is 2.42 mm.
  • the height of the upper surface can be changed to 2.0 mm or less.
  • Table 9 shows the lens properties of the optical system in this embodiment.
  • the optical system 200 includes a first lens 210, a second lens 220, a filter F, and an image sensor IP.
  • the first lens 210 has positive refractive power.
  • the first lens 210 has a convex object side and a convex image side.
  • the first lens 210 may be made of plastic or glass.
  • the first lens 210 may include an aspherical surface.
  • at least one of the object side and the image side of the first lens 210 may be an aspherical surface.
  • one surface of the first lens 210 does not necessarily have to be an aspherical surface.
  • the second lens 220 has positive refractive power.
  • the second lens 220 has a convex object side and a convex image side.
  • the second lens 220 may be made of plastic or glass.
  • the second lens 220 may include an aspherical surface.
  • at least one of the object side and the image side of the second lens 220 may be an aspherical surface.
  • one surface of the second lens 220 does not necessarily have to be an aspherical surface.
  • the focal length f of the optical system according to the present embodiment is 9.58 mm
  • the total length TTL of the optical system is 6.10 mm
  • the height of the image surface is 2.64 mm.
  • the height of the upper surface can be changed to 2.0 mm or less.
  • Table 10 shows the lens properties of the optical system in this embodiment.
  • the optical system 300 includes a first lens 310, a second lens 320, a filter F, and an image sensor IP.
  • the first lens 310 has positive refractive power.
  • the first lens 310 has a convex object side and a convex image side.
  • the first lens 310 may be made of plastic or glass.
  • the first lens 310 may include an aspherical surface.
  • at least one of the object side and the image side of the first lens 310 may be an aspherical surface.
  • one surface of the first lens 310 does not necessarily have to be an aspherical surface.
  • the second lens 320 has negative refractive power.
  • the second lens 320 has a concave object side and a concave image side.
  • the second lens 320 may be made of plastic or glass.
  • the second lens 320 may include an aspherical surface.
  • at least one of the object side and the image side of the second lens 320 may be an aspherical surface.
  • one surface of the second lens 320 does not necessarily have to be an aspherical surface.
  • the focal length (f) of the optical system according to the present embodiment is 4.35 mm
  • the total length (TTL) of the optical system is 3.80 mm
  • the height of the image surface is 1.75 mm.
  • the height of the top surface can be changed to 1.5 mm or less.
  • Table 11 shows the lens properties of the optical system in this embodiment.
  • the optical system 400 includes a first lens 410, a second lens 420, a filter F, and an image sensor IP.
  • the first lens 410 has positive refractive power.
  • the first lens 410 has a convex object side and a convex image side.
  • the first lens 410 may be made of plastic or glass.
  • the first lens 410 may include an aspherical surface.
  • at least one of the object side and the image side of the first lens 410 may be an aspherical surface.
  • one surface of the first lens 410 does not necessarily have to be an aspherical surface.
  • the second lens 420 has negative refractive power.
  • the second lens 420 has a concave object side surface and a convex image side surface.
  • the second lens 420 may be made of plastic or glass.
  • the second lens 420 may include an aspherical surface.
  • at least one of the object side and the image side of the second lens 420 may be an aspherical surface.
  • one surface of the second lens 420 does not necessarily have to be an aspherical surface.
  • the focal length f of the optical system according to the present embodiment is 4.15 mm
  • the total length TTL of the optical system is 3.80 mm
  • the height of the image surface is 1.75 mm.
  • the height of the top surface can be changed to 1.5 mm or less.
  • Table 12 shows the lens properties of the optical system in this embodiment.
  • the optical system 500 includes a first lens 510, a second lens 520, a filter F, and an image sensor IP.
  • the first lens 510 has positive refractive power.
  • the first lens 510 has a convex object side and a concave image side.
  • the first lens 510 may be made of plastic or glass.
  • the first lens 510 may include an aspherical surface.
  • at least one of the object side and the image side of the first lens 510 may be an aspherical surface.
  • one surface of the first lens 510 does not necessarily have to be an aspherical surface.
  • the second lens 520 has negative refractive power.
  • the second lens 520 has a concave object side surface and a convex image side surface.
  • the second lens 520 may be made of plastic or glass.
  • the second lens 520 may include an aspherical surface.
  • at least one of the object side and the image side of the second lens 520 may be an aspherical surface.
  • one surface of the second lens 520 does not necessarily have to be an aspherical surface.
  • the focal length f of the optical system according to the present embodiment is 13.58 mm
  • the total length TTL of the optical system is 3.40 mm
  • the height of the image surface is 2.05 mm.
  • the height of the upper surface can be changed to 2.0 mm or less.
  • Table 13 shows the lens properties of the optical system in this embodiment.
  • the optical system 600 includes a first lens 610, a second lens 620, a filter F, and an image sensor IP.
  • the first lens 610 has positive refractive power.
  • the first lens 610 has a convex object side and a concave image side.
  • the first lens 610 may be made of plastic or glass.
  • the first lens 610 may include an aspherical surface.
  • at least one of the object side and the image side of the first lens 610 may be an aspherical surface.
  • one surface of the first lens 610 does not necessarily have to be an aspherical surface.
  • the second lens 620 has negative refractive power.
  • the second lens 620 has a concave object side surface and a convex image side surface.
  • the second lens 620 may be made of plastic or glass.
  • the second lens 620 may include an aspherical surface.
  • at least one of the object side and the image side of the second lens 620 may be an aspherical surface.
  • one surface of the second lens 620 does not necessarily have to be an aspherical surface.
  • the focal length f of the optical system according to the present exemplary embodiment is 10.30 mm, the total length TTL of the optical system is 3.60 mm, and the height of the image surface is 2.05 mm.
  • the height of the upper surface can be changed to 2.0 mm or less.
  • Table 14 shows the lens properties of the optical system in this embodiment.
  • the optical system 700 includes a first lens 710, a second lens 720, a third lens 730, a filter F, and an image sensor IP.
  • the first lens 710 has positive refractive power.
  • the first lens 710 has a convex object side and a concave image side.
  • the first lens 710 may be made of plastic or glass.
  • the first lens 710 may include an aspherical surface.
  • at least one of the object side and the image side of the first lens 710 may be an aspherical surface.
  • one surface of the first lens 710 does not necessarily have to be an aspherical surface.
  • the second lens 720 has negative refractive power.
  • the second lens 720 has a convex object side and a concave image side.
  • the second lens 720 may be made of plastic or glass.
  • the second lens 720 may include an aspherical surface.
  • at least one of the object side and the image side of the second lens 720 may be an aspherical surface.
  • one surface of the second lens 720 does not necessarily have to be an aspherical surface.
  • the third lens 730 has positive refractive power.
  • the third lens 730 has a convex object side and a concave image side.
  • the third lens 730 may be made of plastic or glass.
  • the third lens 730 may include an aspherical surface.
  • at least one of the object side and the image side of the third lens 730 may be an aspherical surface.
  • one surface of the third lens 730 does not necessarily have to be an aspherical surface.
  • the focal length f of the optical system according to the present embodiment is 4.73 mm
  • the total length (TTL) of the optical system is 4.16 mm
  • the height of the image surface is 2.64 mm.
  • the height of the upper surface can be changed to 2.0 mm or less.
  • Table 15 shows the lens properties of the optical system in this embodiment.
  • the optical system 800 includes a first lens 810, a second lens 820, a third lens 830, a filter F, and an image sensor IP.
  • the first lens 810 has positive refractive power.
  • the first lens 810 has a convex object side and a concave image side.
  • the first lens 810 may be made of plastic or glass.
  • the first lens 810 may include an aspherical surface.
  • at least one of the object side and the image side of the first lens 810 may be an aspherical surface.
  • one surface of the first lens 810 does not necessarily have to be an aspherical surface.
  • the second lens 820 has negative refractive power.
  • the second lens 820 has a convex object side and a concave image side.
  • the second lens 820 may be made of plastic or glass.
  • the second lens 820 may include an aspherical surface.
  • at least one of the object side and the image side of the second lens 820 may be an aspherical surface.
  • one surface of the second lens 820 does not necessarily have to be an aspherical surface.
  • the third lens 830 has positive refractive power.
  • the third lens 830 has a convex object side and a concave image side.
  • the third lens 830 may be made of plastic or glass.
  • the third lens 830 may include an aspherical surface.
  • at least one of the object side and the image side of the third lens 830 may be an aspherical surface.
  • one surface of the third lens 830 does not necessarily have to be an aspherical surface.
  • the focal length f of the optical system according to the present embodiment is 3.22 mm
  • the total length TTL of the optical system is 3.06 mm
  • the height of the image surface is 1.30 mm.
  • the height of the top surface can be changed to 1.0 mm or less.
  • Table 16 shows the lens properties of the optical system in this embodiment.
  • the optical system 900 includes a first lens 910, a second lens 920, a third lens 930, a filter F, and an image sensor IP.
  • the first lens 910 has positive refractive power.
  • the first lens 910 has a convex object side and a convex image side.
  • the first lens 910 may be made of plastic or glass.
  • the first lens 910 may include an aspherical surface.
  • at least one of the object side and the image side of the first lens 910 may be an aspherical surface.
  • one surface of the first lens 910 does not necessarily have to be an aspherical surface.
  • the second lens 920 has positive refractive power.
  • the second lens 920 has a convex object side and a convex image side.
  • the second lens 920 may be made of plastic or glass.
  • the second lens 920 may include an aspherical surface.
  • at least one of the object side and the image side of the second lens 920 may be an aspherical surface.
  • one surface of the second lens 920 does not necessarily have to be an aspherical surface.
  • the third lens 930 has positive refractive power.
  • the third lens 930 has a convex object side and a convex image side.
  • the third lens 930 may be made of plastic or glass.
  • the third lens 930 may include an aspherical surface.
  • at least one of the object side and the image side of the third lens 930 may be an aspherical surface.
  • one surface of the third lens 930 does not necessarily have to be an aspherical surface.
  • the focal length f of the optical system according to the present embodiment is 7.03 mm
  • the total length TTL of the optical system is 5.70 mm
  • the height of the image surface is 1.75 mm.
  • the height of the top surface can be changed to 1.5 mm or less.
  • Table 17 shows the lens properties of the optical system in this embodiment.
  • the optical system 1000 includes a first lens 1010, a second lens 1020, a third lens 1030, a filter F, and an image sensor IP.
  • the first lens 1010 has positive refractive power.
  • the first lens 1010 has a convex object side and a concave image side.
  • the first lens 1010 may be made of plastic or glass.
  • the first lens 1010 may include an aspherical surface.
  • at least one of the object side and the image side of the first lens 1010 may be an aspherical surface.
  • one surface of the first lens 1010 does not necessarily have to be an aspherical surface.
  • the second lens 1020 has positive refractive power.
  • the second lens 1020 has a convex object side and a convex image side.
  • the second lens 1020 may be made of plastic or glass.
  • the second lens 1020 may include an aspherical surface.
  • at least one of the object side and the image side of the second lens 1020 may be an aspherical surface.
  • one surface of the second lens 1020 does not necessarily have to be an aspherical surface.
  • the third lens 1030 has negative refractive power.
  • the third lens 1030 has a concave object side and a concave image side.
  • the third lens 1030 may be made of plastic or glass.
  • the third lens 1030 may include an aspherical surface.
  • at least one of the object side and the image side of the third lens 1030 may be an aspherical surface.
  • one surface of the third lens 1030 does not necessarily have to be an aspherical surface.
  • the focal length (f) of the optical system according to the present embodiment is 3.85 mm
  • the total length (TTL) of the optical system is 3.52 mm
  • the height of the image surface is 1.30 mm.
  • the height of the top surface can be changed to 1.0 mm or less.
  • Table 18 shows the lens properties of the optical system in this embodiment.
  • Table 19 shows the values of the conditional expressions of the first to tenth examples.
  • Embodiment 1 0.917 0.410 6.245 0.880 Embodiment 2 0.637 0.294 9.583 1.084 Third embodiment 0.873 0.646 3.955 1.003 Embodiment 4 0.913 0.688 4.161 0.968 Embodiment 5 0.250 0.330 13.579 1.514 Embodiment 6 0.350 0.450 10.295 1.524 Embodiment 7 0.878 1.322 8.511 2.714 Embodiment 8 0.949 1.179 5.988 2.691 Embodiment 9 0.811 0.313 12.916 1.083 Embodiment 10 0.915 0.755 5.499 9.391
  • the optical system according to the present invention may be mounted on the portable terminal 10.
  • the optical system according to the first to tenth embodiments described above includes a first camera module 20 and a second camera module 20 disposed on the rear surface of the portable terminal 10 as shown in FIG. 19. It may be used as an optical system constituting at least one of 30).

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Abstract

An optical imaging system according to the present invention comprises: a first lens having refractive power; and an image surface for forming an image formation surface of light that is incident by means of the first lens, wherein an effective diameter of the first lens is greater than the diagonal length (2Y) of the image surface and the distance (TTL) from an object side of the first lens to the image surface is 6.5 mm or less.

Description

촬상 광학계Imaging optical system
본 발명은 휴대용 단말기에 장착 가능한 촬상 광학계에 관한 것이다.The present invention relates to an optical system that can be mounted on a portable terminal.
휴대용 단말기는 소형 카메라 및 소형 카메라를 구성하는 촬상 광학계를 포함한다. 휴대용 단말기용 촬상 광학계는 공간적 제약이 크므로 높은 해상도 및 밝은 F-number를 구현하기 어렵다. 아울러, 휴대용 단말기용 촬상 광학계는 공간적 제약이 크므로 원거리 촬상을 위한 광학계를 구현하기 어렵다.The portable terminal includes a small camera and an imaging optical system constituting the small camera. The optical system for portable terminals has large spatial constraints, so it is difficult to implement a high resolution and bright F-number. In addition, since the optical system for imaging a portable terminal has a large spatial limitation, it is difficult to implement an optical system for long-distance imaging.
전자의 문제점을 최소화하고자, 4매 이상의 렌즈로 구성되는 촬상 광학계가 사용되고 있다. 그러나 다수의 렌즈로 구성되는 촬상 광학계는 제조가 용이하지 않고, 제조과정 중에 불량이 많이 발생한다.In order to minimize the former problem, an optical system including four or more lenses is used. However, an optical system comprising a plurality of lenses is not easy to manufacture, and many defects occur during the manufacturing process.
아울러, 후자의 문제점을 최소화하고자, 프리즘 또는 반사경을 이용한 촬상 광학계를 이용하고 있다. 그러나 프리즘 또는 반사경을 이용한 촬상 광학계는 프리즘 또는 반사경의 반사면으로부터 상면까지 상당한 길이를 가지므로, 휴대용 단말기의 공간제약을 여전히 해소하기 어렵다.In addition, in order to minimize the problem of the latter, an imaging optical system using a prism or a reflector is used. However, since the optical system using a prism or a reflector has a considerable length from the reflective surface of the prism or the reflector to the upper surface, it is still difficult to solve the space limitation of the portable terminal.
본 발명은 높은 해상를 구현하면서도 제조가 용이한 촬상 광학계를 제공하는데 그 목적이 있다.An object of the present invention is to provide an imaging optical system that is easy to manufacture while implementing a high resolution.
또한, 본 발명은 카메라 모듈의 높이 및 길이를 최소화시킬 수 있는 촬상 광학계를 제공하는데 그 목적이 있다.In addition, an object of the present invention is to provide an optical system capable of minimizing the height and length of a camera module.
본 발명에 따른 촬상 광학계는 굴절력을 갖는 제1렌즈; 및 상기 제1렌즈에 의해 입사된 빛의 결상면을 구성하는 상면;을 포함하고, 상기 제1렌즈의 유효지름(은 상기 상면의 대각길이(2Y)보다 크고, 상기 제1렌즈의 물체 측면으로부터 상기 상면까지의 거리(TTL)는 6.5 mm 이하이다.The optical system according to the present invention includes a first lens having refractive power; And an image surface constituting an imaging surface of light incident by the first lens, wherein the effective diameter of the first lens is greater than the diagonal length (2Y) of the first lens, The distance to the upper surface (TTL) is 6.5 mm or less.
본 발명에 따른 촬상 광학계에서 상기 제1렌즈는 정의 굴절력을 갖는다.In the optical system according to the present invention, the first lens has a positive refractive power.
본 발명에 따른 촬상 광학계에서 상기 제1렌즈는 물체 측면 및 상 측면 중 적어도 일면이 비구면 형상이다.In the optical system according to the present invention, at least one of the object side and the image side of the first lens has an aspherical shape.
본 발명에 따른 촬상 광학계에서 상기 제1렌즈는 물체 측면이 볼록한 형상이다.In the optical system according to the present invention, the first lens has a convex object side.
본 발명에 따른 촬상 광학계는 조건식 0.7 <TTL/f < 1.2 을 만족한다(상기 조건식에서 f는 촬상 광학계의 초점거리이다).The optical system according to the present invention satisfies the conditional expression 0.7 <TTL/f <1.2 (in the conditional expression, f is the focal length of the optical system).
본 발명에 따른 촬상 광학계에서 상기 제1렌즈의 초점거리(f1)는 조건식 0.8 < f1/f < 1.1을 만족한다.In the optical system according to the present invention, the focal length f1 of the first lens satisfies the conditional expression 0.8 <f1/f <1.1.
본 발명에 따른 촬상 광학계는 굴절력을 갖는 제2렌즈를 더 포함하다.The optical system according to the present invention further includes a second lens having refractive power.
본 발명에 따른 촬상 광학계에서 상기 제1렌즈의 상 측면의 곡률 반지름(R2)과 상기 제2렌즈의 물체 측면의 곡률 반지름(R3)은 조건식 -1.0 < (R2-R3)/(R2+R3) < 1.0을 만족한다.In the optical system according to the present invention, the radius of curvature (R2) of the image side of the first lens and the radius of curvature (R3) of the side of the object of the second lens are the conditional expression -1.0 <(R2-R3)/(R2+R3) <1.0 is satisfied.
본 발명에 따른 또 다른 촬상 광학계는 굴절력을 갖는 제1렌즈, 굴절력을 갖는 제2렌즈를 포함한다. 본 발명에 따른 촬상 광학계는 조건식 0.2 <TTL/f < 1.0, 조건식 fG1/f < 2.0, 조건식 TTL < 6.5 mm을 만족할 수 있다. 상기 조건식에서 TTL은 물체에 가장 가까운 렌즈의 물체 측면으로부터 상면까지의 거리이고, f는 촬상 광학계의 초점거리이고, fG1은 상면에 가장 가까운 렌즈를 제외한 렌즈 군의 초점거리이다.Another optical system according to the present invention includes a first lens having refractive power and a second lens having refractive power. The optical system according to the present invention may satisfy the conditional expression 0.2 <TTL/f <1.0, the conditional expression fG1/f <2.0, and the conditional expression TTL <6.5 mm. In the above conditional equation, TTL is the distance from the object side to the image surface of the lens closest to the object, f is the focal length of the imaging optical system, and fG1 is the focal length of the lens group excluding the lens closest to the image surface.
본 발명에 따른 촬상 광학계는 소형화 및 제작이 용이하다.The optical system according to the present invention is easily miniaturized and manufactured.
도 1은 본 발명의 일 양태의 제1실시 예에 따른 촬상 광학계의 구성도이다.1 is a configuration diagram of an optical system according to a first embodiment of an aspect of the present invention.
도 2는 본 발명의 일 양태의 제2실시 예에 따른 촬상 광학계의 구성도이다.2 is a block diagram of an optical system according to a second embodiment of the present invention.
도 3은 본 발명의 일 양태의 제3실시 예에 따른 촬상 광학계의 구성도이다.3 is a configuration diagram of an optical system according to a third embodiment of the present invention.
도 4는 본 발명의 일 양태의 제4실시 예에 따른 촬상 광학계의 구성도이다.4 is a configuration diagram of an optical system according to a fourth embodiment of the present invention.
도 5는 본 발명의 일 양태의 제5실시 예에 따른 촬상 광학계의 구성도이다.5 is a configuration diagram of an optical system according to a fifth embodiment of the present invention.
도 6은 본 발명의 일 양태의 제6실시 예에 따른 촬상 광학계의 구성도이다.6 is a configuration diagram of an optical system according to a sixth embodiment of the present invention.
도 7은 본 발명의 일 양태의 제7실시 예에 따른 촬상 광학계의 구성도이다.7 is a configuration diagram of an optical system according to a seventh embodiment of the present invention.
도 8은 본 발명의 일 양태의 제8실시 예에 따른 촬상 광학계의 구성도이다.8 is a configuration diagram of an optical system according to an eighth embodiment of the present invention.
도 9는 본 발명의 다른 양태의 제1실시 예에 따른 촬상 광학계의 구성도이다.9 is a configuration diagram of an optical system according to a first embodiment of another aspect of the present invention.
도 10은 본 발명의 다른 양태의 제2실시 예에 따른 촬상 광학계의 구성도이다.10 is a configuration diagram of an optical system according to a second embodiment of another aspect of the present invention.
도 11은 본 발명의 다른 양태의 제3실시 예에 따른 촬상 광학계의 구성도이다.11 is a configuration diagram of an optical system according to a third embodiment of another aspect of the present invention.
도 12는 본 발명의 다른 양태의 제4실시 예에 따른 촬상 광학계의 구성도이다.12 is a configuration diagram of an optical system according to a fourth embodiment of another aspect of the present invention.
도 13은 본 발명의 다른 양태의 제5실시 예에 따른 촬상 광학계의 구성도이다.13 is a configuration diagram of an optical system according to a fifth embodiment of another aspect of the present invention.
도 14는 본 발명의 다른 양태의 제6실시 예에 따른 촬상 광학계의 구성도이다.14 is a configuration diagram of an optical system according to a sixth embodiment of another aspect of the present invention.
도 15는 본 발명의 다른 양태의 제7실시 예에 따른 촬상 광학계의 구성도이다.15 is a configuration diagram of an optical system according to a seventh embodiment of another aspect of the present invention.
도 16은 본 발명의 다른 양태의 제8실시 예에 따른 촬상 광학계의 구성도이다.16 is a configuration diagram of an optical system according to an eighth embodiment of another aspect of the present invention.
도 17은 본 발명의 다른 양태의 제9실시 예에 따른 촬상 광학계의 구성도이다.17 is a configuration diagram of an optical system according to a ninth embodiment of another aspect of the present invention.
도 18은 본 발명의 다른 양태의 제10실시 예에 따른 촬상 광학계의 구성도이다.18 is a configuration diagram of an optical system according to a tenth embodiment of another aspect of the present invention.
도 19는 본 발명의 다른 양태의 따른 촬상 광학계를 구비한 휴대 단말기의 배면도이다.19 is a rear view of a portable terminal including an optical system according to another aspect of the present invention.
이하, 본 발명의 바람직한 실시예를 첨부된 예시도면에 의거하여 상세히 설명한다.Hereinafter, a preferred embodiment of the present invention will be described in detail on the basis of the accompanying drawings.
아래에서 본 발명을 설명함에 있어서, 본 발명의 구성요소를 지칭하는 용어들은 각각의 구성요소들의 기능을 고려하여 명명된 것이므로, 본 발명의 기술적 구성요소를 한정하는 의미로 이해되어서는 안 될 것이다.In the following description of the present invention, terms referring to the constituent elements of the present invention are named in consideration of the functions of the respective constituent elements, so they should not be understood as limiting the technical constituents of the present invention.
(본 발명의 일 양태에 따른 촬상 광학계)(Imaging optical system according to an aspect of the present invention)
본 발명에 따른 촬상 광학계는 제조공정을 간소화할 수 있도록 3매 이하의 렌즈로 구성된다. 아울러, 촬상 광학계는 낮은 f-number를 구현할 수 있도록 물체 측에 가장 가깝게 배치되는 렌즈의 유효지름(ED)을 상면의 대각길이(2Y)보다 크게 형성한다. 또한, 촬상 광학계는 휴대용 단말기에 용이하게 장착될 수 있도록 물체 측에 가장 가깝게 배치되는 렌즈의 물체 측면으로부터 상면까지의 거리(TTL)를 6.5 mm 이하로 형성한다.The optical system according to the present invention is composed of three or less lenses to simplify the manufacturing process. In addition, the optical system makes the effective diameter ED of the lens closest to the object side larger than the diagonal length 2Y of the image so as to implement a low f-number. In addition, the optical system has a distance TTL of 6.5 mm or less from the object side to the image surface of the lens disposed closest to the object side so that it can be easily mounted on the portable terminal.
촬상 광학계는 하나 이상의 렌즈를 포함한다. 예를 들어, 촬상 광학계는 정의 굴절력을 갖는 제1렌즈를 포함할 수 있다. 아울러, 촬상 광학계는 적외선을 차단하기 위한 필터와 결상면을 형성하기 위한 이미지센서를 포함할 수 있다.The imaging optical system includes one or more lenses. For example, the optical system may include a first lens having positive refractive power. In addition, the optical system may include a filter for blocking infrared rays and an image sensor for forming an imaging surface.
본 발명에 따른 촬상 광학계는 하기 조건식 중 하나 이상을 만족한다.The optical system according to the present invention satisfies at least one of the following conditional expressions.
[조건식 1] 0.7 <TTL/f < 1.2[Conditional Expression 1] 0.7 <TTL/f <1.2
[조건식 2] 0.8 < f1/f < 1.1[Conditional Expression 2] 0.8 <f1/f <1.1
[조건식 3] -1.0 < (R2-R3)/(R2+R3) < 1.0[Conditional Expression 3] -1.0 <(R2-R3)/(R2+R3) <1.0
상기 조건식에서 TTL은 물체 측에 가장 가깝게 배치되는 렌즈(제1렌즈)의 물체 측면으로부터 상면까지의 거리이고, f는 촬상 광학계의 초점거리이고, f1은 제1렌즈의 초점거리이고, R2는 제1렌즈의 상 측면의 곡률 반지름이고, R3은 제2렌즈의 물체 측면의 곡률 반지름이다.In the above conditional equation, TTL is the distance from the object side to the image surface of the lens (first lens) arranged closest to the object side, f is the focal length of the imaging optical system, f1 is the focal length of the first lens, and R2 is the first lens. 1 is the radius of curvature of the image side of the lens, and R3 is the radius of curvature of the object side of the second lens.
이하에서 본 발명의 여러 실시 예에 따른 촬상 광학계를 설명한다.Hereinafter, an optical system according to various embodiments of the present disclosure will be described.
먼저, 도 1을 참조하여 제1실시 예에 따른 촬상 광학계를 설명한다.First, an optical system according to a first embodiment will be described with reference to FIG. 1.
본 실시 예에 따른 촬상 광학계(10)는 제1렌즈(101), 필터(301), 이미지센서(401)를 포함한다.The optical system 10 according to the present embodiment includes a first lens 101, a filter 301, and an image sensor 401.
제1렌즈(101)는 정의 굴절력을 갖는다. 제1렌즈(101)는 물체 측면이 볼록하고 상 측면이 볼록한 형상이다. 제1렌즈(101)는 플라스틱 또는 유리재질로 이루어질 수 있다. 아울러, 제1렌즈(101)는 일면이 비구면일 수 있다. 그러나 제1렌즈(101)의 일면이 반드시 비구면이여야 하는 것은 아니다. 제1렌즈(101)는 높은 아베수를 갖는 재질로 구성된다. 예를 들어, 제1렌즈(101)의 아베수는 50 이상일 수 있다.The first lens 101 has positive refractive power. The first lens 101 has a convex object side and a convex image side. The first lens 101 may be made of plastic or glass. In addition, one surface of the first lens 101 may be an aspherical surface. However, one surface of the first lens 101 does not necessarily have to be an aspherical surface. The first lens 101 is made of a material having a high Abbe number. For example, the Abbe number of the first lens 101 may be 50 or more.
본 실시 예에 따른 촬상 광학계(10)의 F-number는 1.06 이고, 촬상 광학계의 초점거리(f)는 5.109 mm이고, 촬상 광학계의 전체 길이(TTL)는 5.10 mm이고, 상면의 대각길이(2Y)는 3.5 mm이다.The F-number of the imaging optical system 10 according to the present embodiment is 1.06, the focal length f of the imaging optical system is 5.109 mm, the total length TTL of the imaging optical system is 5.10 mm, and the diagonal length of the image surface (2Y) ) Is 3.5 mm.
표 1은 본 실시 예에 촬상 광학계의 렌즈 물성을 나타낸 것이다.Table 1 shows the lens properties of the optical system in this embodiment.
비고Remark 곡률반지름Radius of curvature 두께/거리Thickness/distance 굴절률Refractive index 아베수Abbesu 초점거리Focal length
제1렌즈First lens 5.2505.250 2.52.5 1.5461.546 56.1156.11 5.1095.109
-4.950-4.950 2.02.0
필터filter infinityinfinity 0.10.1 1.5191.519 64.2064.20
infinityinfinity 0.50.5
상면Top infinityinfinity
도 2를 참조하여 제2실시 예에 따른 촬상 광학계를 설명한다.An optical system according to a second embodiment will be described with reference to FIG. 2.
본 실시 예에 따른 촬상 광학계(20)는 제1렌즈(102), 필터(302), 이미지센서(402)를 포함한다.The optical system 20 according to the present embodiment includes a first lens 102, a filter 302, and an image sensor 402.
제1렌즈(102)는 정의 굴절력을 갖는다. 제1렌즈(102)는 물체 측면이 볼록하고 상 측면이 볼록한 형상이다. 제1렌즈(102)는 플라스틱 또는 유리재질로 이루어질 수 있다. 아울러, 제1렌즈(102)는 일면이 비구면일 수 있다. 그러나 제1렌즈(102)의 일면이 반드시 비구면이여야 하는 것은 아니다. 제1렌즈(102)는 높은 아베수를 갖는 재질로 구성된다. 예를 들어, 제1렌즈(102)의 아베수는 50 이상일 수 있다.The first lens 102 has positive refractive power. The first lens 102 has a convex object side and a convex image side. The first lens 102 may be made of plastic or glass. In addition, one surface of the first lens 102 may be an aspherical surface. However, one surface of the first lens 102 does not necessarily have to be an aspherical surface. The first lens 102 is made of a material having a high Abbe number. For example, the Abbe number of the first lens 102 may be 50 or more.
본 실시 예에 따른 촬상 광학계(20)의 F-number는 1.08 이고, 촬상 광학계의 초점거리(f)는 5.198 mm이고, 촬상 광학계의 전체 길이(TTL)는 5.20 mm이고, 상면의 대각길이(2Y)는 3.5 mm이다.The F-number of the imaging optical system 20 according to the present embodiment is 1.08, the focal length f of the imaging optical system is 5.198 mm, the total length TTL of the imaging optical system is 5.20 mm, and the diagonal length of the image surface (2Y) ) Is 3.5 mm.
표 2는 본 실시 예에 촬상 광학계의 렌즈 물성을 나타낸 것이다.Table 2 shows the lens properties of the optical system in this embodiment.
비고Remark 곡률반지름Radius of curvature 두께/거리Thickness/distance 굴절률Refractive index 아베수Abbesu 초점거리Focal length
제1렌즈First lens 5.205.20 2.72.7 1.5461.546 56.1156.11 5.1985.198
-5.10-5.10 1.91.9
필터filter infinityinfinity 0.10.1 1.5191.519 64.2064.20
infinityinfinity 0.50.5
상면Top infinityinfinity
도 3을 참조하여 제3실시 예에 따른 촬상 광학계를 설명한다.An optical system according to a third embodiment will be described with reference to FIG. 3.
본 실시 예에 따른 촬상 광학계(30)는 제1렌즈(103), 필터(303), 이미지센서(403)를 포함한다.The optical system 30 according to the present embodiment includes a first lens 103, a filter 303, and an image sensor 403.
제1렌즈(103)는 정의 굴절력을 갖는다. 제1렌즈(103)는 물체 측면이 볼록하고 상 측면이 볼록한 형상이다. 제1렌즈(103)는 플라스틱 또는 유리재질로 이루어질 수 있다. 아울러, 제1렌즈(103)는 일면이 비구면일 수 있다. 그러나 제1렌즈(103)의 일면이 반드시 비구면이여야 하는 것은 아니다. 제1렌즈(103)는 높은 아베수를 갖는 재질로 구성된다. 예를 들어, 제1렌즈(103)의 아베수는 50 이상일 수 있다.The first lens 103 has positive refractive power. The first lens 103 has a convex object side and a convex image side. The first lens 103 may be made of plastic or glass. In addition, one surface of the first lens 103 may be an aspherical surface. However, one surface of the first lens 103 does not necessarily have to be an aspherical surface. The first lens 103 is made of a material having a high Abbe number. For example, the Abbe number of the first lens 103 may be 50 or more.
본 실시 예에 따른 촬상 광학계(30)의 F-number는 1.12 이고, 촬상 광학계의 초점거리(f)는 5.391 mm이고, 촬상 광학계의 전체 길이(TTL)는 5.40 mm이고, 상면의 대각길이(2Y)는 3.5 mm이다.The F-number of the imaging optical system 30 according to the present embodiment is 1.12, the focal length f of the imaging optical system is 5.391 mm, the total length TTL of the imaging optical system is 5.40 mm, and the diagonal length of the image plane (2Y ) Is 3.5 mm.
표 3은 본 실시 예에 촬상 광학계의 렌즈 물성을 나타낸 것이다.Table 3 shows the lens properties of the optical system in this embodiment.
비고Remark 곡률반지름Radius of curvature 두께/거리Thickness/distance 굴절률Refractive index 아베수Abbesu 초점거리Focal length
제1렌즈First lens 5.405.40 3.03.0 1.5461.546 56.1156.11 5.3915.391
-5.20-5.20 1.81.8
필터filter infinityinfinity 0.10.1 1.5191.519 64.2064.20
infinityinfinity 0.50.5
상면Top infinityinfinity
도 4를 참조하여 제4실시 예에 따른 촬상 광학계를 설명한다.An optical system according to a fourth embodiment will be described with reference to FIG. 4.
본 실시 예에 따른 촬상 광학계(40)는 제1렌즈(104), 필터(304), 이미지센서(404)를 포함한다.The optical system 40 according to the present embodiment includes a first lens 104, a filter 304, and an image sensor 404.
제1렌즈(104)는 정의 굴절력을 갖는다. 제1렌즈(104)는 물체 측면이 볼록하고 상 측면이 볼록한 형상이다. 제1렌즈(104)는 플라스틱 또는 유리재질로 이루어질 수 있다. 아울러, 제1렌즈(104)는 일면이 비구면일 수 있다. 그러나 제1렌즈(104)의 일면이 반드시 비구면이여야 하는 것은 아니다. 제1렌즈(104)는 높은 아베수를 갖는 재질로 구성된다. 예를 들어, 제1렌즈(104)의 아베수는 50 이상일 수 있다.The first lens 104 has positive refractive power. The first lens 104 has a convex object side and a convex image side. The first lens 104 may be made of plastic or glass. In addition, one surface of the first lens 104 may be an aspherical surface. However, one surface of the first lens 104 does not necessarily have to be an aspherical surface. The first lens 104 is made of a material having a high Abbe number. For example, the Abbe number of the first lens 104 may be 50 or more.
본 실시 예에 따른 촬상 광학계(40)의 F-number는 1.15 이고, 촬상 광학계의 초점거리(f)는 5.981 mm이고, 촬상 광학계의 전체 길이(TTL)는 6.00 mm이고, 상면의 대각길이(2Y)는 3.5 mm이다.The F-number of the imaging optical system 40 according to the present embodiment is 1.15, the focal length f of the imaging optical system is 5.981 mm, the total length TTL of the imaging optical system is 6.00 mm, and the diagonal length of the image plane (2Y ) Is 3.5 mm.
표 4는 본 실시 예에 촬상 광학계의 렌즈 물성을 나타낸 것이다.Table 4 shows the lens properties of the optical system in this embodiment.
비고Remark 곡률반지름Radius of curvature 두께/거리Thickness/distance 굴절률Refractive index 아베수Abbesu 초점거리Focal length
제1렌즈First lens 6.3506.350 3.03.0 1.5461.546 56.1156.11 5.9815.981
-5.600-5.600 2.42.4
필터filter infinityinfinity 0.10.1 1.5191.519 64.2064.20
infinityinfinity 0.50.5
상면Top infinityinfinity
도 5를 참조하여 제5실시 예에 따른 촬상 광학계를 설명한다.An optical system according to a fifth embodiment will be described with reference to FIG. 5.
본 실시 예에 따른 촬상 광학계(50)는 제1렌즈(105), 제2렌즈(206), 필터(305), 이미지센서(405)를 포함한다.The optical system 50 according to the present embodiment includes a first lens 105, a second lens 206, a filter 305, and an image sensor 405.
제1렌즈(105)는 정의 굴절력을 갖는다. 제1렌즈(105)는 물체 측면이 볼록하고 상 측면이 볼록한 형상이다. 제1렌즈(105)는 플라스틱 또는 유리재질로 이루어질 수 있다. 아울러, 제1렌즈(105)는 일면이 비구면일 수 있다. 그러나 제1렌즈(105)의 일면이 반드시 비구면이여야 하는 것은 아니다. 제1렌즈(105)는 높은 아베수를 갖는 재질로 구성된다. 예를 들어, 제1렌즈(105)의 아베수는 50 이상일 수 있다.The first lens 105 has positive refractive power. The first lens 105 has a convex object side and a convex image side. The first lens 105 may be made of plastic or glass. In addition, one surface of the first lens 105 may be an aspherical surface. However, one surface of the first lens 105 does not necessarily have to be an aspherical surface. The first lens 105 is made of a material having a high Abbe number. For example, the Abbe number of the first lens 105 may be 50 or more.
제2렌즈(205)는 정의 굴절력을 갖는다. 제2렌즈(105)는 물체 측면이 오목하고 상 측면이 볼록한 형상이다. 제2렌즈(205)는 플라스틱 또는 유리재질로 이루어질 수 있다. 아울러, 제2렌즈(205)는 일면이 비구면일 수 있다. 그러나 제2렌즈(205)의 일면이 반드시 비구면이여야 하는 것은 아니다. 제2렌즈(205)는 제1렌즈보다 아베수가 낮은 재질로 구성된다. 예를 들어, 제2렌즈(205)의 아베수는 30 이하일 수 있다.The second lens 205 has positive refractive power. The second lens 105 has a concave object side surface and a convex image side surface. The second lens 205 may be made of plastic or glass. In addition, one surface of the second lens 205 may be an aspherical surface. However, one surface of the second lens 205 does not necessarily have to be an aspherical surface. The second lens 205 is made of a material having a lower Abbe number than the first lens. For example, the Abbe number of the second lens 205 may be 30 or less.
본 실시 예에 따른 촬상 광학계(50)의 F-number는 1.22 이고, 촬상 광학계의 초점거리(f)는 5.84 mm이고, 촬상 광학계의 전체 길이(TTL)는 5.90 mm이고, 상면의 대각길이(2Y)는 3.5 mm이다.The F-number of the imaging optical system 50 according to the present embodiment is 1.22, the focal length f of the imaging optical system is 5.84 mm, the total length TTL of the imaging optical system is 5.90 mm, and the diagonal length of the image surface (2Y) ) Is 3.5 mm.
표 5는 본 실시 예에 촬상 광학계의 렌즈 물성을 나타낸 것이다.Table 5 shows the lens properties of the optical system in this embodiment.
비고Remark 곡률 반지름Radius of curvature 두께/거리Thickness/distance 굴절률Refractive index 아베수Abbesu 초점거리Focal length
제1렌즈First lens 5.205.20 2.52.5 1.551.55 56.156.1 5.6155.615
-6.20-6.20 0.50.5
제2렌즈Second lens -8.20-8.20 2.02.0 1.671.67 20.420.4 61.25361.253
-7.50-7.50 0.80.8
필터filter infinityinfinity 0.10.1 1.521.52 64.264.2
infinityinfinity 0.50.5
상면Top infinityinfinity
도 6을 참조하여 제6실시 예에 따른 촬상 광학계를 설명한다.An optical system according to a sixth embodiment will be described with reference to FIG. 6.
제1렌즈(106)는 정의 굴절력을 갖는다. 제1렌즈(106)는 물체 측면이 볼록하고 상 측면이 볼록한 형상이다. 제1렌즈(106)는 플라스틱 또는 유리재질로 이루어질 수 있다. 아울러, 제1렌즈(106)는 일면이 비구면일 수 있다. 그러나 제1렌즈(106)의 일면이 반드시 비구면이여야 하는 것은 아니다. 제1렌즈(106)는 높은 아베수를 갖는 재질로 구성된다. 예를 들어, 제1렌즈(106)의 아베수는 50 이상일 수 있다.The first lens 106 has positive refractive power. The first lens 106 has a convex object side and a convex image side. The first lens 106 may be made of plastic or glass. In addition, one surface of the first lens 106 may be an aspherical surface. However, one surface of the first lens 106 does not necessarily have to be an aspherical surface. The first lens 106 is made of a material having a high Abbe number. For example, the Abbe number of the first lens 106 may be 50 or more.
제2렌즈(206)는 정의 굴절력을 갖는다. 제2렌즈(106)는 물체 측면이 오목하고 상 측면이 볼록한 형상이다. 제2렌즈(206)는 플라스틱 또는 유리재질로 이루어질 수 있다. 아울러, 제2렌즈(206)는 일면이 비구면일 수 있다. 그러나 제2렌즈(206)의 일면이 반드시 비구면이여야 하는 것은 아니다. 제2렌즈(206)는 제1렌즈보다 아베수가 낮은 재질로 구성된다. 예를 들어, 제2렌즈(206)의 아베수는 30 이하일 수 있다.The second lens 206 has positive refractive power. The second lens 106 has a concave object side and a convex image side. The second lens 206 may be made of plastic or glass. In addition, one surface of the second lens 206 may be an aspherical surface. However, one surface of the second lens 206 does not necessarily have to be an aspherical surface. The second lens 206 is made of a material having a lower Abbe number than the first lens. For example, the Abbe number of the second lens 206 may be 30 or less.
본 실시 예에 따른 촬상 광학계(60)의 F-number는 1.17 이고, 촬상 광학계의 초점거리(f)는 5.87 mm이고, 촬상 광학계의 전체 길이(TTL)는 5.90 mm이고, 상면의 대각길이(2Y)는 3.5 mm이다.The F-number of the imaging optical system 60 according to the present embodiment is 1.17, the focal length f of the imaging optical system is 5.87 mm, the total length TTL of the imaging optical system is 5.90 mm, and the diagonal length of the image surface (2Y) ) Is 3.5 mm.
표 6은 본 실시 예에 촬상 광학계의 렌즈 물성을 나타낸 것이다.Table 6 shows the lens properties of the optical system in this embodiment.
비고Remark 곡률 반지름Radius of curvature 두께/거리Thickness/distance 굴절률Refractive index 아베수Abbesu 초점거리Focal length
제1렌즈First lens 5.105.10 2.52.5 1.551.55 56.156.1 5.8925.892
-7.20-7.20 0.50.5
제2렌즈Second lens -8.10-8.10 1.61.6 1.671.67 20.420.4 45.39545.395
-6.90-6.90 1.21.2
필터filter infinityinfinity 0.10.1 1.521.52 64.264.2
infinityinfinity 0.50.5
상면Top infinityinfinity
도 7을 참조하여 제7실시 예에 따른 촬상 광학계를 설명한다.An optical system according to a seventh embodiment will be described with reference to FIG. 7.
제1렌즈(107)는 정의 굴절력을 갖는다. 제1렌즈(107)는 물체 측면이 볼록하고 상 측면이 볼록한 형상이다. 제1렌즈(107)는 플라스틱 또는 유리재질로 이루어질 수 있다. 아울러, 제1렌즈(107)는 일면이 비구면일 수 있다. 그러나 제1렌즈(107)의 일면이 반드시 비구면이여야 하는 것은 아니다. 제1렌즈(107)는 높은 아베수를 갖는 재질로 구성된다. 예를 들어, 제1렌즈(107)의 아베수는 50 이상일 수 있다.The first lens 107 has positive refractive power. The first lens 107 has a convex object side and a convex image side. The first lens 107 may be made of plastic or glass. In addition, one surface of the first lens 107 may be an aspherical surface. However, one surface of the first lens 107 does not necessarily have to be an aspherical surface. The first lens 107 is made of a material having a high Abbe number. For example, the Abbe number of the first lens 107 may be 50 or more.
제2렌즈(207)는 부의 굴절력을 갖는다. 제2렌즈(107)는 물체 측면이 오목하고 상 측면이 볼록한 형상이다. 제2렌즈(207)는 플라스틱 또는 유리재질로 이루어질 수 있다. 아울러, 제2렌즈(207)는 일면이 비구면일 수 있다. 그러나 제2렌즈(207)의 일면이 반드시 비구면이여야 하는 것은 아니다. 제2렌즈(207)는 제1렌즈보다 아베수가 낮은 재질로 구성된다. 예를 들어, 제2렌즈(207)의 아베수는 30 이하일 수 있다.The second lens 207 has negative refractive power. The second lens 107 has a concave object side surface and a convex image side surface. The second lens 207 may be made of plastic or glass. In addition, one surface of the second lens 207 may be an aspherical surface. However, one surface of the second lens 207 does not necessarily have to be an aspherical surface. The second lens 207 is made of a material having a lower Abbe number than the first lens. For example, the Abbe number of the second lens 207 may be 30 or less.
본 실시 예에 따른 촬상 광학계(70)의 F-number는 1.16 이고, 촬상 광학계의 초점거리(f)는 5.82 mm이고, 촬상 광학계의 전체 길이(TTL)는 6.00 mm이고, 상면의 대각길이(2Y)는 3.5 mm이다.The F-number of the imaging optical system 70 according to the present embodiment is 1.16, the focal length f of the imaging optical system is 5.82 mm, the total length TTL of the imaging optical system is 6.00 mm, and the diagonal length of the image surface (2Y) ) Is 3.5 mm.
표 7은 본 실시 예에 촬상 광학계의 렌즈 물성을 나타낸 것이다.Table 7 shows the lens properties of the optical system in this embodiment.
비고Remark 곡률 반지름Radius of curvature 두께/거리Thickness/distance 굴절률Refractive index 아베수Abbesu 초점거리Focal length
제1렌즈First lens 5.05.0 2.62.6 1.551.55 56.156.1 5.2985.298
-5.6-5.6 0.50.5
제2렌즈Second lens -5.8-5.8 1.41.4 1.671.67 20.420.4 -1424.2-1424.2
-6.4-6.4 1.41.4
필터filter infinityinfinity 0.10.1 1.521.52 64.264.2
infinityinfinity 0.50.5
상면Top infinityinfinity
도 8을 참조하여 제8실시 예에 따른 촬상 광학계를 설명한다.An optical system according to an eighth embodiment will be described with reference to FIG. 8.
제1렌즈(108)는 정의 굴절력을 갖는다. 제1렌즈(108)는 물체 측면이 볼록하고 상 측면이 오목한 형상이다. 제1렌즈(108)는 플라스틱 또는 유리재질로 이루어질 수 있다. 아울러, 제1렌즈(108)는 일면이 비구면일 수 있다. 그러나 제1렌즈(108)의 일면이 반드시 비구면이여야 하는 것은 아니다. 제1렌즈(108)는 높은 아베수를 갖는 재질로 구성된다. 예를 들어, 제1렌즈(108)의 아베수는 50 이상일 수 있다.The first lens 108 has positive refractive power. The first lens 108 has a convex object side and a concave image side. The first lens 108 may be made of plastic or glass. In addition, one surface of the first lens 108 may be an aspherical surface. However, one surface of the first lens 108 does not necessarily have to be an aspherical surface. The first lens 108 is made of a material having a high Abbe number. For example, the Abbe number of the first lens 108 may be 50 or more.
제2렌즈(208)는 부의 굴절력을 갖는다. 제2렌즈(108)는 물체 측면이 볼록하고 상 측면이 오목한 형상이다. 제2렌즈(208)는 플라스틱 또는 유리재질로 이루어질 수 있다. 아울러, 제2렌즈(208)는 일면이 비구면일 수 있다. 그러나 제2렌즈(208)의 일면이 반드시 비구면이여야 하는 것은 아니다. 제2렌즈(208)는 제1렌즈보다 아베수가 낮은 재질로 구성된다. 예를 들어, 제2렌즈(208)의 아베수는 30 이하일 수 있다.The second lens 208 has negative refractive power. The second lens 108 has a convex object side and a concave image side. The second lens 208 may be made of plastic or glass. In addition, one surface of the second lens 208 may be an aspherical surface. However, one surface of the second lens 208 does not necessarily have to be an aspherical surface. The second lens 208 is made of a material having a lower Abbe number than the first lens. For example, the Abbe number of the second lens 208 may be 30 or less.
본 실시 예에 따른 촬상 광학계(80)의 F-number는 1.17 이고, 촬상 광학계의 초점거리(f)는 5.76 mm이고, 촬상 광학계의 전체 길이(TTL)는 5.60 mm이고, 상면의 대각길이(2Y)는 3.5 mm이다.The F-number of the imaging optical system 80 according to the present embodiment is 1.17, the focal length f of the imaging optical system is 5.76 mm, the total length TTL of the imaging optical system is 5.60 mm, and the diagonal length of the image surface (2Y) ) Is 3.5 mm.
표 8은 본 실시 예에 촬상 광학계의 렌즈 물성을 나타낸 것이다.Table 8 shows the lens properties of the optical system in this embodiment.
비고Remark 곡률 반지름Radius of curvature 두께/거리Thickness/distance 굴절률Refractive index 아베수Abbesu 초점거리Focal length
제1렌즈First lens 2.82.8 2.42.4 1.551.55 56.156.1 5.4625.462
32.032.0 0.50.5
제2렌즈Second lens 14.214.2 1.21.2 1.671.67 20.420.4 -29.7-29.7
8.08.0 1.41.4
필터filter infinityinfinity 0.10.1 1.521.52 64.264.2
infinityinfinity 0.50.5
상면Top infinityinfinity
(본 발명의 다른 양태에 따른 촬상 광학계)(Imaging optical system according to another aspect of the present invention)
본 발명에 따른 촬상 광학계는 제조공정을 간소화할 수 있도록 3매 이하의 렌즈로 구성된다. 촬상 광학계는 휴대용 단말기에 용이하게 장착될 수 있도록 물체 측에 가장 가깝게 배치되는 렌즈의 물체 측면으로부터 상면까지의 거리(TTL)를 6.5 mm 이하로 형성한다. 바람직하게는 TTL은 6.0 mm 이하일 수 있다.The optical system according to the present invention is composed of three or less lenses to simplify the manufacturing process. The optical system has a distance (TTL) of 6.5 mm or less from the object side to the image surface of the lens disposed closest to the object side so that it can be easily mounted on the portable terminal. Preferably, the TTL may be 6.0 mm or less.
촬상 광학계는 하나 이상의 렌즈를 포함한다. 예를 들어, 촬상 광학계는 2매 또는 3매 렌즈로 구성될 수 있다. 아울러, 촬상 광학계는 적외선을 차단하기 위한 필터와 결상면을 형성하기 위한 이미지센서를 포함할 수 있다.The imaging optical system includes one or more lenses. For example, the optical system may be composed of two or three lenses. In addition, the optical system may include a filter for blocking infrared rays and an image sensor for forming an imaging surface.
본 발명에 따른 촬상 광학계는 하기 조건식 중 하나 이상을 만족한다.The optical system according to the present invention satisfies at least one of the following conditional expressions.
0.2 <TTL/f < 1.00.2 <TTL/f <1.0
fG1/f < 2.0fG1/f <2.0
TTL < 6.5 mmTTL <6.5 mm
3.8 < f/BFL < 15.03.8 <f/BFL <15.0
0.8 < f1/R1 < 10.00.8 <f1/R1 <10.0
상기 조건식에서 TTL은 물체(피사체)에 가장 가깝게 배치되는 렌즈(제1렌즈)의 물체 측면으로부터 상면까지의 거리이고, f는 촬상 광학계의 초점거리이고, fG1은 상면에 가장 가까운 렌즈를 제외한 렌즈 군의 (합성)초점거리이고, f1은 제1렌즈의 초점거리이고, BFL은 상면에 가장 가깝게 배치되는 렌즈의 상 측면으로부터 상면까지의 거리이고, R1는 제1렌즈의 물체 측면의 곡률 반지름이다.In the above conditional equation, TTL is the distance from the object side to the image surface of the lens (first lens) arranged closest to the object (subject), f is the focal length of the imaging optical system, and fG1 is the lens group excluding the lens closest to the image surface. Is the (composite) focal length of, f1 is the focal length of the first lens, BFL is the distance from the image side of the lens disposed closest to the image surface to the image surface, and R1 is the radius of curvature of the object side of the first lens.
본 발명에 따른 촬상 광학계는 2매로 구성될 경우 하기 조건식 중 하나 이상을 추가로 만족할 수 있다.When the optical system according to the present invention is composed of two sheets, one or more of the following conditional expressions may be additionally satisfied.
0.2 < fG1/f < 0.80.2 <fG1/f <0.8
0.8 < f1/R1 < 2.00.8 <f1/R1 <2.0
본 발명에 따른 촬상 광학계는 3매로 구성될 경우 하기 조건식 중 하나 이상을 추가로 만족할 수 있다.When the optical system according to the present invention is composed of three sheets, one or more of the following conditional expressions may be additionally satisfied.
0.3 < fG1/f < 2.00.3 <fG1/f <2.0
1.0 < f1/R1 <10.01.0 <f1/R1 <10.0
이하에서 본 발명의 여러 실시 예에 따른 촬상 광학계를 설명한다.Hereinafter, an optical system according to various embodiments of the present disclosure will be described.
먼저, 도 9를 참조하여 제1실시 예에 따른 촬상 광학계를 설명한다.First, an optical system according to a first embodiment will be described with reference to FIG. 9.
본 실시 예에 따른 촬상 광학계(100)는 제1렌즈(110), 제2렌즈(120), 필터(F), 이미지센서(IP)를 포함한다.The optical system 100 according to the present exemplary embodiment includes a first lens 110, a second lens 120, a filter F, and an image sensor IP.
제1렌즈(110)는 정의 굴절력을 갖는다. 제1렌즈(110)는 물체 측면이 볼록하고 상 측면이 볼록한 형상이다. 제1렌즈(110)는 플라스틱 또는 유리재질로 이루어질 수 있다. 제1렌즈(110)는 비구면을 포함할 수 있다. 예를 들어, 제1렌즈(110)의 물체 측면 및 상 측면 중 하나는 이상은 비구면일 수 있다. 그러나 제1렌즈(110)의 일면이 반드시 비구면이여야 하는 것은 아니다. The first lens 110 has positive refractive power. The first lens 110 has a convex object side and a convex image side. The first lens 110 may be made of plastic or glass. The first lens 110 may include an aspherical surface. For example, at least one of the object side and the image side of the first lens 110 may be an aspherical surface. However, one surface of the first lens 110 does not necessarily have to be an aspherical surface.
제2렌즈(120)는 정의 굴절력을 갖는다. 제2렌즈(120)는 물체 측면이 볼록하고 상 측면이 볼록한 형상이다. 제2렌즈(120)는 플라스틱 또는 유리재질로 이루어질 수 있다. 제2렌즈(120)는 비구면을 포함할 수 있다. 예를 들어, 제2렌즈(120)의 물체 측면 및 상 측면 중 하나는 이상은 비구면일 수 있다. 그러나 제2렌즈(120)의 일면이 반드시 비구면이여야 하는 것은 아니다. The second lens 120 has positive refractive power. The second lens 120 has a convex object side and a convex image side. The second lens 120 may be made of plastic or glass. The second lens 120 may include an aspherical surface. For example, at least one of the object side and the image side of the second lens 120 may be an aspherical surface. However, one surface of the second lens 120 does not necessarily have to be an aspherical surface.
본 실시 예에 따른 촬상 광학계의 초점거리(f)는 6.87 mm이고, 촬상 광학계의 전체 길이(TTL)는 6.30 mm이고, 상면의 높이는 2.42 mm이다. 상면의 높이는 2.0 mm 이하로 변경될 수 있다.The focal length f of the optical system according to the present embodiment is 6.87 mm, the total length TTL of the optical system is 6.30 mm, and the height of the image surface is 2.42 mm. The height of the upper surface can be changed to 2.0 mm or less.
표 9는 본 실시 예에 촬상 광학계의 렌즈 물성을 나타낸 것이다.Table 9 shows the lens properties of the optical system in this embodiment.
면번호Cotton number 비고Remark 곡률반지름Radius of curvature 두께/거리Thickness/distance 굴절률Refractive index 아베수Abbesu 초점거리Focal length
S1S1 제1렌즈First lens 3.20 3.20 1.20 1.20 1.55 1.55 56.11 56.11 2.815 2.815
S2S2 -2.60 -2.60 3.20 3.20
S3S3 제2렌즈Second lens 2.20 2.20 0.80 0.80 1.67 1.67 20.35 20.35 1.736 1.736
S4S4 -2.10 -2.10 0.80 0.80
S5S5 필터filter infinityinfinity 0.10 0.10 1.52 1.52 64.20 64.20
S6S6 infinityinfinity 0.20 0.20
상면Top infinityinfinity 00
도 10을 참조하여 제2실시 예에 따른 촬상 광학계를 설명한다.An optical system according to a second embodiment will be described with reference to FIG. 10.
본 실시 예에 따른 촬상 광학계(200)는 제1렌즈(210), 제2렌즈(220), 필터(F), 이미지센서(IP)를 포함한다.The optical system 200 according to the present embodiment includes a first lens 210, a second lens 220, a filter F, and an image sensor IP.
제1렌즈(210)는 정의 굴절력을 갖는다. 제1렌즈(210)는 물체 측면이 볼록하고 상 측면이 볼록한 형상이다. 제1렌즈(210)는 플라스틱 또는 유리재질로 이루어질 수 있다. 제1렌즈(210)는 비구면을 포함할 수 있다. 예를 들어, 제1렌즈(210)의 물체 측면 및 상 측면 중 하나는 이상은 비구면일 수 있다. 그러나 제1렌즈(210)의 일면이 반드시 비구면이여야 하는 것은 아니다. The first lens 210 has positive refractive power. The first lens 210 has a convex object side and a convex image side. The first lens 210 may be made of plastic or glass. The first lens 210 may include an aspherical surface. For example, at least one of the object side and the image side of the first lens 210 may be an aspherical surface. However, one surface of the first lens 210 does not necessarily have to be an aspherical surface.
제2렌즈(220)는 정의 굴절력을 갖는다. 제2렌즈(220)는 물체 측면이 볼록하고 상 측면이 볼록한 형상이다. 제2렌즈(220)는 플라스틱 또는 유리재질로 이루어질 수 있다. 제2렌즈(220)는 비구면을 포함할 수 있다. 예를 들어, 제2렌즈(220)의 물체 측면 및 상 측면 중 하나는 이상은 비구면일 수 있다. 그러나 제2렌즈(220)의 일면이 반드시 비구면이여야 하는 것은 아니다. The second lens 220 has positive refractive power. The second lens 220 has a convex object side and a convex image side. The second lens 220 may be made of plastic or glass. The second lens 220 may include an aspherical surface. For example, at least one of the object side and the image side of the second lens 220 may be an aspherical surface. However, one surface of the second lens 220 does not necessarily have to be an aspherical surface.
본 실시 예에 따른 촬상 광학계의 초점거리(f)는 9.58 mm이고, 촬상 광학계의 전체 길이(TTL)는 6.10 mm이고, 상면의 높이는 2.64 mm이다. 상면의 높이는 2.0 mm 이하로 변경될 수 있다.The focal length f of the optical system according to the present embodiment is 9.58 mm, the total length TTL of the optical system is 6.10 mm, and the height of the image surface is 2.64 mm. The height of the upper surface can be changed to 2.0 mm or less.
표 10은 본 실시 예에 촬상 광학계의 렌즈 물성을 나타낸 것이다.Table 10 shows the lens properties of the optical system in this embodiment.
면번호Cotton number 비고Remark 곡률반지름Radius of curvature 두께/거리Thickness/distance 굴절률Refractive index 아베수Abbesu 초점거리Focal length
S1S1 제1렌즈First lens 2.60 2.60 1.30 1.30 1.55 1.55 56.11 56.11 2.817 2.817
S2S2 -3.10 -3.10 3.00 3.00
S3S3 제2렌즈Second lens 1.20 1.20 0.80 0.80 1.67 1.67 20.35 20.35 1.246 1.246
S4S4 -2.00 -2.00 0.70 0.70
S5S5 필터filter infinityinfinity 0.10 0.10 1.52 1.52 64.20 64.20
S6S6 infinityinfinity 0.20 0.20
상면Top infinityinfinity 00
도 11을 참조하여 제3실시 예에 따른 촬상 광학계를 설명한다.An optical system according to a third embodiment will be described with reference to FIG. 11.
본 실시 예에 따른 촬상 광학계(300)는 제1렌즈(310), 제2렌즈(320), 필터(F), 이미지센서(IP)를 포함한다.The optical system 300 according to the present exemplary embodiment includes a first lens 310, a second lens 320, a filter F, and an image sensor IP.
제1렌즈(310)는 정의 굴절력을 갖는다. 제1렌즈(310)는 물체 측면이 볼록하고 상 측면이 볼록한 형상이다. 제1렌즈(310)는 플라스틱 또는 유리재질로 이루어질 수 있다. 제1렌즈(310)는 비구면을 포함할 수 있다. 예를 들어, 제1렌즈(310)의 물체 측면 및 상 측면 중 하나는 이상은 비구면일 수 있다. 그러나 제1렌즈(310)의 일면이 반드시 비구면이여야 하는 것은 아니다. The first lens 310 has positive refractive power. The first lens 310 has a convex object side and a convex image side. The first lens 310 may be made of plastic or glass. The first lens 310 may include an aspherical surface. For example, at least one of the object side and the image side of the first lens 310 may be an aspherical surface. However, one surface of the first lens 310 does not necessarily have to be an aspherical surface.
제2렌즈(320)는 부의 굴절력을 갖는다. 제2렌즈(320)는 물체 측면이 오목하고 상 측면이 오목한 형상이다. 제2렌즈(320)는 플라스틱 또는 유리재질로 이루어질 수 있다. 제2렌즈(320)는 비구면을 포함할 수 있다. 예를 들어, 제2렌즈(320)의 물체 측면 및 상 측면 중 하나는 이상은 비구면일 수 있다. 그러나 제2렌즈(320)의 일면이 반드시 비구면이여야 하는 것은 아니다. The second lens 320 has negative refractive power. The second lens 320 has a concave object side and a concave image side. The second lens 320 may be made of plastic or glass. The second lens 320 may include an aspherical surface. For example, at least one of the object side and the image side of the second lens 320 may be an aspherical surface. However, one surface of the second lens 320 does not necessarily have to be an aspherical surface.
본 실시 예에 따른 촬상 광학계의 초점거리(f)는 4.35 mm이고, 촬상 광학계의 전체 길이(TTL)는 3.80 mm이고, 상면의 높이는 1.75 mm이다. 상면의 높이는 1.5 mm 이하로 변경될 수 있다.The focal length (f) of the optical system according to the present embodiment is 4.35 mm, the total length (TTL) of the optical system is 3.80 mm, and the height of the image surface is 1.75 mm. The height of the top surface can be changed to 1.5 mm or less.
표 11은 본 실시 예에 촬상 광학계의 렌즈 물성을 나타낸 것이다.Table 11 shows the lens properties of the optical system in this embodiment.
면번호Cotton number 비고Remark 곡률반지름Radius of curvature 두께/거리Thickness/distance 굴절률Refractive index 아베수Abbesu 초점거리Focal length
S1S1 제1렌즈First lens 2.80 2.80 1.10 1.10 1.55 1.55 56.11 56.11 2.809 2.809
S2S2 -2.92 -2.92 1.10 1.10
S3S3 제2렌즈Second lens -2.60 -2.60 0.50 0.50 1.67 1.67 20.35 20.35 -3.682 -3.682
S4S4 50.00 50.00 0.80 0.80
S5S5 필터filter infinityinfinity 0.10 0.10 1.52 1.52 64.20 64.20
S6S6 infinityinfinity 0.20 0.20
상면Top infinityinfinity 00
도 12를 참조하여 제4실시 예에 따른 촬상 광학계를 설명한다.An optical system according to a fourth embodiment will be described with reference to FIG. 12.
본 실시 예에 따른 촬상 광학계(400)는 제1렌즈(410), 제2렌즈(420), 필터(F), 이미지센서(IP)를 포함한다.The optical system 400 according to the present embodiment includes a first lens 410, a second lens 420, a filter F, and an image sensor IP.
제1렌즈(410)는 정의 굴절력을 갖는다. 제1렌즈(410)는 물체 측면이 볼록하고 상 측면이 볼록한 형상이다. 제1렌즈(410)는 플라스틱 또는 유리재질로 이루어질 수 있다. 제1렌즈(410)는 비구면을 포함할 수 있다. 예를 들어, 제1렌즈(410)의 물체 측면 및 상 측면 중 하나는 이상은 비구면일 수 있다. 그러나 제1렌즈(410)의 일면이 반드시 비구면이여야 하는 것은 아니다. The first lens 410 has positive refractive power. The first lens 410 has a convex object side and a convex image side. The first lens 410 may be made of plastic or glass. The first lens 410 may include an aspherical surface. For example, at least one of the object side and the image side of the first lens 410 may be an aspherical surface. However, one surface of the first lens 410 does not necessarily have to be an aspherical surface.
제2렌즈(420)는 부의 굴절력을 갖는다. 제2렌즈(420)는 물체 측면이 오목하고 상 측면이 볼록한 형상이다. 제2렌즈(420)는 플라스틱 또는 유리재질로 이루어질 수 있다. 제2렌즈(420)는 비구면을 포함할 수 있다. 예를 들어, 제2렌즈(420)의 물체 측면 및 상 측면 중 하나는 이상은 비구면일 수 있다. 그러나 제2렌즈(420)의 일면이 반드시 비구면이여야 하는 것은 아니다. The second lens 420 has negative refractive power. The second lens 420 has a concave object side surface and a convex image side surface. The second lens 420 may be made of plastic or glass. The second lens 420 may include an aspherical surface. For example, at least one of the object side and the image side of the second lens 420 may be an aspherical surface. However, one surface of the second lens 420 does not necessarily have to be an aspherical surface.
본 실시 예에 따른 촬상 광학계의 초점거리(f)는 4.15 mm이고, 촬상 광학계의 전체 길이(TTL)는 3.80 mm이고, 상면의 높이는 1.75 mm이다. 상면의 높이는 1.5 mm 이하로 변경될 수 있다.The focal length f of the optical system according to the present embodiment is 4.15 mm, the total length TTL of the optical system is 3.80 mm, and the height of the image surface is 1.75 mm. The height of the top surface can be changed to 1.5 mm or less.
표 12는 본 실시 예에 촬상 광학계의 렌즈 물성을 나타낸 것이다.Table 12 shows the lens properties of the optical system in this embodiment.
면번호Cotton number 비고Remark 곡률반지름Radius of curvature 두께/거리Thickness/distance 굴절률Refractive index 아베수Abbesu 초점거리Focal length
S1S1 제1렌즈First lens 2.96 2.96 1.00 1.00 1.55 1.55 56.11 56.11 2.865 2.865
S2S2 -2.92 -2.92 1.00 1.00
S3S3 제2렌즈Second lens -3.20 -3.20 0.80 0.80 1.67 1.67 20.35 20.35 -4.930 -4.930
S4S4 -120.0 -120.0 0.70 0.70
S5S5 필터filter infinityinfinity 0.10 0.10 1.52 1.52 64.20 64.20
S6S6 infinityinfinity 0.20 0.20
상면Top infinityinfinity 00
도 13을 참조하여 제5실시 예에 따른 촬상 광학계를 설명한다.An optical system according to a fifth embodiment will be described with reference to FIG. 13.
본 실시 예에 따른 촬상 광학계(500)는 제1렌즈(510), 제2렌즈(520), 필터(F), 이미지센서(IP)를 포함한다.The optical system 500 according to the present embodiment includes a first lens 510, a second lens 520, a filter F, and an image sensor IP.
제1렌즈(510)는 정의 굴절력을 갖는다. 제1렌즈(510)는 물체 측면이 볼록하고 상 측면이 오목한 형상이다. 제1렌즈(510)는 플라스틱 또는 유리재질로 이루어질 수 있다. 제1렌즈(510)는 비구면을 포함할 수 있다. 예를 들어, 제1렌즈(510)의 물체 측면 및 상 측면 중 하나는 이상은 비구면일 수 있다. 그러나 제1렌즈(510)의 일면이 반드시 비구면이여야 하는 것은 아니다. The first lens 510 has positive refractive power. The first lens 510 has a convex object side and a concave image side. The first lens 510 may be made of plastic or glass. The first lens 510 may include an aspherical surface. For example, at least one of the object side and the image side of the first lens 510 may be an aspherical surface. However, one surface of the first lens 510 does not necessarily have to be an aspherical surface.
제2렌즈(520)는 부의 굴절력을 갖는다. 제2렌즈(520)는 물체 측면이 오목하고 상 측면이 볼록한 형상이다. 제2렌즈(520)는 플라스틱 또는 유리재질로 이루어질 수 있다. 제2렌즈(520)는 비구면을 포함할 수 있다. 예를 들어, 제2렌즈(520)의 물체 측면 및 상 측면 중 하나는 이상은 비구면일 수 있다. 그러나 제2렌즈(520)의 일면이 반드시 비구면이여야 하는 것은 아니다. The second lens 520 has negative refractive power. The second lens 520 has a concave object side surface and a convex image side surface. The second lens 520 may be made of plastic or glass. The second lens 520 may include an aspherical surface. For example, at least one of the object side and the image side of the second lens 520 may be an aspherical surface. However, one surface of the second lens 520 does not necessarily have to be an aspherical surface.
본 실시 예에 따른 촬상 광학계의 초점거리(f)는 13.58 mm이고, 촬상 광학계의 전체 길이(TTL)는 3.40 mm이고, 상면의 높이는 2.05 mm이다. 상면의 높이는 2.0 mm 이하로 변경될 수 있다.The focal length f of the optical system according to the present embodiment is 13.58 mm, the total length TTL of the optical system is 3.40 mm, and the height of the image surface is 2.05 mm. The height of the upper surface can be changed to 2.0 mm or less.
표 13은 본 실시 예에 촬상 광학계의 렌즈 물성을 나타낸 것이다.Table 13 shows the lens properties of the optical system in this embodiment.
면번호Cotton number 비고Remark 곡률반지름Radius of curvature 두께/거리Thickness/distance 굴절률Refractive index 아베수Abbesu 초점거리Focal length
S1S1 제1렌즈First lens 2.96 2.96 1.00 1.00 1.68 1.68 56.11 56.11 4.480 4.480
S2S2 100.00 100.00 0.80 0.80
S3S3 제2렌즈Second lens -2.40 -2.40 0.60 0.60 1.55 1.55 20.35 20.35 -4.604 -4.604
S4S4 -60.00 -60.00 0.70 0.70
S5S5 필터filter infinityinfinity 0.10 0.10 1.52 1.52 64.20 64.20
S6S6 infinityinfinity 0.20 0.20
상면Top infinityinfinity 00
도 14를 참조하여 제6실시 예에 따른 촬상 광학계를 설명한다.An optical system according to a sixth embodiment will be described with reference to FIG. 14.
본 실시 예에 따른 촬상 광학계(600)는 제1렌즈(610), 제2렌즈(620), 필터(F), 이미지센서(IP)를 포함한다.The optical system 600 according to the present exemplary embodiment includes a first lens 610, a second lens 620, a filter F, and an image sensor IP.
제1렌즈(610)는 정의 굴절력을 갖는다. 제1렌즈(610)는 물체 측면이 볼록하고 상 측면이 오목한 형상이다. 제1렌즈(610)는 플라스틱 또는 유리재질로 이루어질 수 있다. 제1렌즈(610)는 비구면을 포함할 수 있다. 예를 들어, 제1렌즈(610)의 물체 측면 및 상 측면 중 하나는 이상은 비구면일 수 있다. 그러나 제1렌즈(610)의 일면이 반드시 비구면이여야 하는 것은 아니다. The first lens 610 has positive refractive power. The first lens 610 has a convex object side and a concave image side. The first lens 610 may be made of plastic or glass. The first lens 610 may include an aspherical surface. For example, at least one of the object side and the image side of the first lens 610 may be an aspherical surface. However, one surface of the first lens 610 does not necessarily have to be an aspherical surface.
제2렌즈(620)는 부의 굴절력을 갖는다. 제2렌즈(620)는 물체 측면이 오목하고 상 측면이 볼록한 형상이다. 제2렌즈(620)는 플라스틱 또는 유리재질로 이루어질 수 있다. 제2렌즈(620)는 비구면을 포함할 수 있다. 예를 들어, 제2렌즈(620)의 물체 측면 및 상 측면 중 하나는 이상은 비구면일 수 있다. 그러나 제2렌즈(620)의 일면이 반드시 비구면이여야 하는 것은 아니다. The second lens 620 has negative refractive power. The second lens 620 has a concave object side surface and a convex image side surface. The second lens 620 may be made of plastic or glass. The second lens 620 may include an aspherical surface. For example, at least one of the object side and the image side of the second lens 620 may be an aspherical surface. However, one surface of the second lens 620 does not necessarily have to be an aspherical surface.
본 실시 예에 따른 촬상 광학계의 초점거리(f)는 10.30 mm이고, 촬상 광학계의 전체 길이(TTL)는 3.60 mm이고, 상면의 높이는 2.05 mm이다. 상면의 높이는 2.0 mm 이하로 변경될 수 있다.The focal length f of the optical system according to the present exemplary embodiment is 10.30 mm, the total length TTL of the optical system is 3.60 mm, and the height of the image surface is 2.05 mm. The height of the upper surface can be changed to 2.0 mm or less.
표 14는 본 실시 예에 촬상 광학계의 렌즈 물성을 나타낸 것이다.Table 14 shows the lens properties of the optical system in this embodiment.
면번호Cotton number 비고Remark 곡률반지름Radius of curvature 두께/거리Thickness/distance 굴절률Refractive index 아베수Abbesu 초점거리Focal length
S1S1 제1렌즈First lens 3.04 3.04 1.10 1.10 1.68 1.68 56.11 56.11 4.634 4.634
S2S2 80.00 80.00 1.00 1.00
S3S3 제2렌즈Second lens -2.80 -2.80 0.50 0.50 1.55 1.55 20.35 20.35 -5.406 -5.406
S4S4 -60.00 -60.00 0.70 0.70
S5S5 필터filter infinityinfinity 0.10 0.10 1.52 1.52 64.20 64.20
S6S6 infinityinfinity 0.20 0.20
상면Top infinityinfinity 00
도 15를 참조하여 제7실시 예에 따른 촬상 광학계를 설명한다.An optical system according to a seventh embodiment will be described with reference to FIG. 15.
본 실시 예에 따른 촬상 광학계(700)는 제1렌즈(710), 제2렌즈(720), 제3렌즈(730), 필터(F), 이미지센서(IP)를 포함한다.The optical system 700 according to the present embodiment includes a first lens 710, a second lens 720, a third lens 730, a filter F, and an image sensor IP.
제1렌즈(710)는 정의 굴절력을 갖는다. 제1렌즈(710)는 물체 측면이 볼록하고 상 측면이 오목한 형상이다. 제1렌즈(710)는 플라스틱 또는 유리재질로 이루어질 수 있다. 제1렌즈(710)는 비구면을 포함할 수 있다. 예를 들어, 제1렌즈(710)의 물체 측면 및 상 측면 중 하나는 이상은 비구면일 수 있다. 그러나 제1렌즈(710)의 일면이 반드시 비구면이여야 하는 것은 아니다. The first lens 710 has positive refractive power. The first lens 710 has a convex object side and a concave image side. The first lens 710 may be made of plastic or glass. The first lens 710 may include an aspherical surface. For example, at least one of the object side and the image side of the first lens 710 may be an aspherical surface. However, one surface of the first lens 710 does not necessarily have to be an aspherical surface.
제2렌즈(720)는 부의 굴절력을 갖는다. 제2렌즈(720)는 물체 측면이 볼록하고 상 측면이 오목한 형상이다. 제2렌즈(720)는 플라스틱 또는 유리재질로 이루어질 수 있다. 제2렌즈(720)는 비구면을 포함할 수 있다. 예를 들어, 제2렌즈(720)의 물체 측면 및 상 측면 중 하나는 이상은 비구면일 수 있다. 그러나 제2렌즈(720)의 일면이 반드시 비구면이여야 하는 것은 아니다. The second lens 720 has negative refractive power. The second lens 720 has a convex object side and a concave image side. The second lens 720 may be made of plastic or glass. The second lens 720 may include an aspherical surface. For example, at least one of the object side and the image side of the second lens 720 may be an aspherical surface. However, one surface of the second lens 720 does not necessarily have to be an aspherical surface.
제3렌즈(730)는 정의 굴절력을 갖는다. 제3렌즈(730)는 물체 측면이 볼록하고 상 측면이 오목한 형상이다. 제3렌즈(730)는 플라스틱 또는 유리재질로 이루어질 수 있다. 제3렌즈(730)는 비구면을 포함할 수 있다. 예를 들어, 제3렌즈(730)의 물체 측면 및 상 측면 중 하나는 이상은 비구면일 수 있다. 그러나 제3렌즈(730)의 일면이 반드시 비구면이여야 하는 것은 아니다. The third lens 730 has positive refractive power. The third lens 730 has a convex object side and a concave image side. The third lens 730 may be made of plastic or glass. The third lens 730 may include an aspherical surface. For example, at least one of the object side and the image side of the third lens 730 may be an aspherical surface. However, one surface of the third lens 730 does not necessarily have to be an aspherical surface.
본 실시 예에 따른 촬상 광학계의 초점거리(f)는 4.73 mm이고, 촬상 광학계의 전체 길이(TTL)는 4.16 mm이고, 상면의 높이는 2.64 mm이다. 상면의 높이는 2.0 mm 이하로 변경될 수 있다.The focal length f of the optical system according to the present embodiment is 4.73 mm, the total length (TTL) of the optical system is 4.16 mm, and the height of the image surface is 2.64 mm. The height of the upper surface can be changed to 2.0 mm or less.
표 15는 본 실시 예에 촬상 광학계의 렌즈 물성을 나타낸 것이다.Table 15 shows the lens properties of the optical system in this embodiment.
면번호Cotton number 비고Remark 곡률반지름Radius of curvature 두께/거리Thickness/distance 굴절률Refractive index 아베수Abbesu 초점거리Focal length
S1S1 제1렌즈First lens 1.32 1.32 0.80 0.80 1.55 1.55 56.11 56.11 3.59 3.59
S2S2 3.20 3.20 1.00 1.00
S3S3 제2렌즈Second lens 60.00 60.00 0.60 0.60 1.67 1.67 20.35 20.35 -3.39 -3.39
S4S4 2.18 2.18 0.60 0.60
S5S5 제3렌즈3rd lens 3.14 3.14 0.60 0.60 1.55 1.55 56.11 56.11 6.10 6.10
S6S6 50.00 50.00 0.26 0.26
S7S7 필터filter infinityinfinity 0.10 0.10 1.52 1.52 64.20 64.20
S8S8 infinityinfinity 0.20 0.20
S9S9 상면Top infinityinfinity 0.00 0.00
도 16을 참조하여 제8실시 예에 따른 촬상 광학계를 설명한다.An optical system according to an eighth embodiment will be described with reference to FIG. 16.
본 실시 예에 따른 촬상 광학계(800)는 제1렌즈(810), 제2렌즈(820), 제3렌즈(830), 필터(F), 이미지센서(IP)를 포함한다.The optical system 800 according to the present embodiment includes a first lens 810, a second lens 820, a third lens 830, a filter F, and an image sensor IP.
제1렌즈(810)는 정의 굴절력을 갖는다. 제1렌즈(810)는 물체 측면이 볼록하고 상 측면이 오목한 형상이다. 제1렌즈(810)는 플라스틱 또는 유리재질로 이루어질 수 있다. 제1렌즈(810)는 비구면을 포함할 수 있다. 예를 들어, 제1렌즈(810)의 물체 측면 및 상 측면 중 하나는 이상은 비구면일 수 있다. 그러나 제1렌즈(810)의 일면이 반드시 비구면이여야 하는 것은 아니다. The first lens 810 has positive refractive power. The first lens 810 has a convex object side and a concave image side. The first lens 810 may be made of plastic or glass. The first lens 810 may include an aspherical surface. For example, at least one of the object side and the image side of the first lens 810 may be an aspherical surface. However, one surface of the first lens 810 does not necessarily have to be an aspherical surface.
제2렌즈(820)는 부의 굴절력을 갖는다. 제2렌즈(820)는 물체 측면이 볼록하고 상 측면이 오목한 형상이다. 제2렌즈(820)는 플라스틱 또는 유리재질로 이루어질 수 있다. 제2렌즈(820)는 비구면을 포함할 수 있다. 예를 들어, 제2렌즈(820)의 물체 측면 및 상 측면 중 하나는 이상은 비구면일 수 있다. 그러나 제2렌즈(820)의 일면이 반드시 비구면이여야 하는 것은 아니다. The second lens 820 has negative refractive power. The second lens 820 has a convex object side and a concave image side. The second lens 820 may be made of plastic or glass. The second lens 820 may include an aspherical surface. For example, at least one of the object side and the image side of the second lens 820 may be an aspherical surface. However, one surface of the second lens 820 does not necessarily have to be an aspherical surface.
제3렌즈(830)는 정의 굴절력을 갖는다. 제3렌즈(830)는 물체 측면이 볼록하고 상 측면이 오목한 형상이다. 제3렌즈(830)는 플라스틱 또는 유리재질로 이루어질 수 있다. 제3렌즈(830)는 비구면을 포함할 수 있다. 예를 들어, 제3렌즈(830)의 물체 측면 및 상 측면 중 하나는 이상은 비구면일 수 있다. 그러나 제3렌즈(830)의 일면이 반드시 비구면이여야 하는 것은 아니다. The third lens 830 has positive refractive power. The third lens 830 has a convex object side and a concave image side. The third lens 830 may be made of plastic or glass. The third lens 830 may include an aspherical surface. For example, at least one of the object side and the image side of the third lens 830 may be an aspherical surface. However, one surface of the third lens 830 does not necessarily have to be an aspherical surface.
본 실시 예에 따른 촬상 광학계의 초점거리(f)는 3.22 mm이고, 촬상 광학계의 전체 길이(TTL)는 3.06 mm이고, 상면의 높이는 1.30 mm이다. 상면의 높이는 1.0 mm 이하로 변경될 수 있다.The focal length f of the optical system according to the present embodiment is 3.22 mm, the total length TTL of the optical system is 3.06 mm, and the height of the image surface is 1.30 mm. The height of the top surface can be changed to 1.0 mm or less.
표 16은 본 실시 예에 촬상 광학계의 렌즈 물성을 나타낸 것이다.Table 16 shows the lens properties of the optical system in this embodiment.
면번호Cotton number 비고Remark 곡률반지름Radius of curvature 두께/거리Thickness/distance 굴절률Refractive index 아베수Abbesu 초점거리Focal length
S1S1 제1렌즈First lens 1.30 1.30 0.80 0.80 1.55 1.55 56.11 56.11 3.51 3.51
S2S2 3.20 3.20 0.02 0.02
S3S3 제2렌즈Second lens 3.13 3.13 0.80 0.80 1.67 1.67 20.35 20.35 -11.49 -11.49
S4S4 2.00 2.00 0.30 0.30
S5S5 제3렌즈3rd lens 3.14 3.14 0.60 0.60 1.55 1.55 56.11 56.11 13.30 13.30
S6S6 5.17 5.17 0.24 0.24
S7S7 필터filter infinityinfinity 0.10 0.10 1.52 1.52 64.20 64.20
S8S8 infinityinfinity 0.20 0.20
S9S9 상면Top infinityinfinity 0.00 0.00
도 17를 참조하여 제9실시 예에 따른 촬상 광학계를 설명한다.An optical system according to a ninth embodiment will be described with reference to FIG. 17.
본 실시 예에 따른 촬상 광학계(900)는 제1렌즈(910), 제2렌즈(920), 제3렌즈(930), 필터(F), 이미지센서(IP)를 포함한다.The optical system 900 according to the present embodiment includes a first lens 910, a second lens 920, a third lens 930, a filter F, and an image sensor IP.
제1렌즈(910)는 정의 굴절력을 갖는다. 제1렌즈(910)는 물체 측면이 볼록하고 상 측면이 볼록한 형상이다. 제1렌즈(910)는 플라스틱 또는 유리재질로 이루어질 수 있다. 제1렌즈(910)는 비구면을 포함할 수 있다. 예를 들어, 제1렌즈(910)의 물체 측면 및 상 측면 중 하나는 이상은 비구면일 수 있다. 그러나 제1렌즈(910)의 일면이 반드시 비구면이여야 하는 것은 아니다. The first lens 910 has positive refractive power. The first lens 910 has a convex object side and a convex image side. The first lens 910 may be made of plastic or glass. The first lens 910 may include an aspherical surface. For example, at least one of the object side and the image side of the first lens 910 may be an aspherical surface. However, one surface of the first lens 910 does not necessarily have to be an aspherical surface.
제2렌즈(920)는 정의 굴절력을 갖는다. 제2렌즈(920)는 물체 측면이 볼록하고 상 측면이 볼록한 형상이다. 제2렌즈(920)는 플라스틱 또는 유리재질로 이루어질 수 있다. 제2렌즈(920)는 비구면을 포함할 수 있다. 예를 들어, 제2렌즈(920)의 물체 측면 및 상 측면 중 하나는 이상은 비구면일 수 있다. 그러나 제2렌즈(920)의 일면이 반드시 비구면이여야 하는 것은 아니다. The second lens 920 has positive refractive power. The second lens 920 has a convex object side and a convex image side. The second lens 920 may be made of plastic or glass. The second lens 920 may include an aspherical surface. For example, at least one of the object side and the image side of the second lens 920 may be an aspherical surface. However, one surface of the second lens 920 does not necessarily have to be an aspherical surface.
제3렌즈(930)는 정의 굴절력을 갖는다. 제3렌즈(930)는 물체 측면이 볼록하고 상 측면이 볼록한 형상이다. 제3렌즈(930)는 플라스틱 또는 유리재질로 이루어질 수 있다. 제3렌즈(930)는 비구면을 포함할 수 있다. 예를 들어, 제3렌즈(930)의 물체 측면 및 상 측면 중 하나는 이상은 비구면일 수 있다. 그러나 제3렌즈(930)의 일면이 반드시 비구면이여야 하는 것은 아니다. The third lens 930 has positive refractive power. The third lens 930 has a convex object side and a convex image side. The third lens 930 may be made of plastic or glass. The third lens 930 may include an aspherical surface. For example, at least one of the object side and the image side of the third lens 930 may be an aspherical surface. However, one surface of the third lens 930 does not necessarily have to be an aspherical surface.
본 실시 예에 따른 촬상 광학계의 초점거리(f)는 7.03 mm이고, 촬상 광학계의 전체 길이(TTL)는 5.70 mm이고, 상면의 높이는 1.75 mm이다. 상면의 높이는 1.5 mm 이하로 변경될 수 있다.The focal length f of the optical system according to the present embodiment is 7.03 mm, the total length TTL of the optical system is 5.70 mm, and the height of the image surface is 1.75 mm. The height of the top surface can be changed to 1.5 mm or less.
표 17은 본 실시 예에 촬상 광학계의 렌즈 물성을 나타낸 것이다.Table 17 shows the lens properties of the optical system in this embodiment.
면번호Cotton number 비고Remark 곡률반지름Radius of curvature 두께/거리Thickness/distance 굴절률Refractive index 아베수Abbesu 초점거리Focal length
S1S1 제1렌즈First lens 2.40 2.40 0.84 0.84 1.55 1.55 56.11 56.11 2.60 2.60
S2S2 -3.04 -3.04 0.02 0.02
S3S3 제2렌즈Second lens 32.00 32.00 0.40 0.40 1.67 1.67 20.35 20.35 11.44 11.44
S4S4 -10.00 -10.00 3.50 3.50
S5S5 제3렌즈3rd lens 2.80 2.80 0.40 0.40 1.55 1.55 56.11 56.11 2.80 2.80
S6S6 -3.20 -3.20 0.24 0.24
S7S7 필터filter infinityinfinity 0.10 0.10 1.52 1.52 64.20 64.20
S8S8 infinityinfinity 0.20 0.20
S9S9 상면Top infinityinfinity 0.00 0.00
도 18을 참조하여 제10실시 예에 따른 촬상 광학계를 설명한다.An optical system according to a tenth embodiment will be described with reference to FIG. 18.
본 실시 예에 따른 촬상 광학계(1000)는 제1렌즈(1010), 제2렌즈(1020), 제3렌즈(1030), 필터(F), 이미지센서(IP)를 포함한다.The optical system 1000 according to the present exemplary embodiment includes a first lens 1010, a second lens 1020, a third lens 1030, a filter F, and an image sensor IP.
제1렌즈(1010)는 정의 굴절력을 갖는다. 제1렌즈(1010)는 물체 측면이 볼록하고 상 측면이 오목한 형상이다. 제1렌즈(1010)는 플라스틱 또는 유리재질로 이루어질 수 있다. 제1렌즈(1010)는 비구면을 포함할 수 있다. 예를 들어, 제1렌즈(1010)의 물체 측면 및 상 측면 중 하나는 이상은 비구면일 수 있다. 그러나 제1렌즈(1010)의 일면이 반드시 비구면이여야 하는 것은 아니다. The first lens 1010 has positive refractive power. The first lens 1010 has a convex object side and a concave image side. The first lens 1010 may be made of plastic or glass. The first lens 1010 may include an aspherical surface. For example, at least one of the object side and the image side of the first lens 1010 may be an aspherical surface. However, one surface of the first lens 1010 does not necessarily have to be an aspherical surface.
제2렌즈(1020)는 정의 굴절력을 갖는다. 제2렌즈(1020)는 물체 측면이 볼록하고 상 측면이 볼록한 형상이다. 제2렌즈(1020)는 플라스틱 또는 유리재질로 이루어질 수 있다. 제2렌즈(1020)는 비구면을 포함할 수 있다. 예를 들어, 제2렌즈(1020)의 물체 측면 및 상 측면 중 하나는 이상은 비구면일 수 있다. 그러나 제2렌즈(1020)의 일면이 반드시 비구면이여야 하는 것은 아니다. The second lens 1020 has positive refractive power. The second lens 1020 has a convex object side and a convex image side. The second lens 1020 may be made of plastic or glass. The second lens 1020 may include an aspherical surface. For example, at least one of the object side and the image side of the second lens 1020 may be an aspherical surface. However, one surface of the second lens 1020 does not necessarily have to be an aspherical surface.
제3렌즈(1030)는 부의 굴절력을 갖는다. 제3렌즈(1030)는 물체 측면이 오목하고 상 측면이 오목한 형상이다. 제3렌즈(1030)는 플라스틱 또는 유리재질로 이루어질 수 있다. 제3렌즈(1030)는 비구면을 포함할 수 있다. 예를 들어, 제3렌즈(1030)의 물체 측면 및 상 측면 중 하나는 이상은 비구면일 수 있다. 그러나 제3렌즈(1030)의 일면이 반드시 비구면이여야 하는 것은 아니다. The third lens 1030 has negative refractive power. The third lens 1030 has a concave object side and a concave image side. The third lens 1030 may be made of plastic or glass. The third lens 1030 may include an aspherical surface. For example, at least one of the object side and the image side of the third lens 1030 may be an aspherical surface. However, one surface of the third lens 1030 does not necessarily have to be an aspherical surface.
본 실시 예에 따른 촬상 광학계의 초점거리(f)는 3.85 mm이고, 촬상 광학계의 전체 길이(TTL)는 3.52 mm이고, 상면의 높이는 1.30 mm이다. 상면의 높이는 1.0 mm 이하로 변경될 수 있다.The focal length (f) of the optical system according to the present embodiment is 3.85 mm, the total length (TTL) of the optical system is 3.52 mm, and the height of the image surface is 1.30 mm. The height of the top surface can be changed to 1.0 mm or less.
표 18은 본 실시 예에 촬상 광학계의 렌즈 물성을 나타낸 것이다.Table 18 shows the lens properties of the optical system in this embodiment.
면번호Cotton number 비고Remark 곡률반지름Radius of curvature 두께/거리Thickness/distance 굴절률Refractive index 아베수Abbesu 초점거리Focal length
S1S1 제1렌즈First lens 3.20 3.20 0.40 0.40 1.54591.5459 56.11 56.11 30.05 30.05
S2S2 3.80 3.80 0.12 0.12
S3S3 제2렌즈Second lens 3.80 3.80 0.60 0.60 1.67 1.67 20.35 20.35 3.04 3.04
S4S4 -4.10 -4.10 1.40 1.40
S5S5 제3렌즈3rd lens -6.00 -6.00 0.30 0.30 1.64 1.64 56.11 56.11 -4.31 -4.31
S6S6 5.20 5.20 0.40 0.40
S7S7 필터filter infinityinfinity 0.10 0.10 1.52 1.52 25.60 25.60
S8S8 infinityinfinity 0.20 0.20
S9S9 상면Top infinityinfinity 0.00 0.00
표 19는 제1실시 예 내지 제10실시 예의 조건식 값을 나타낸다.Table 19 shows the values of the conditional expressions of the first to tenth examples.
비고Remark TTL/fTTL/f fG1/ffG1/f f/BFLf/BFL f1/R1f1/R1
제1실시예Embodiment 1 0.917 0.917 0.410 0.410 6.245 6.245 0.880 0.880
제2실시예Embodiment 2 0.637 0.637 0.294 0.294 9.583 9.583 1.084 1.084
제3실시예Third embodiment 0.873 0.873 0.646 0.646 3.955 3.955 1.003 1.003
제4실시예Embodiment 4 0.913 0.913 0.688 0.688 4.161 4.161 0.968 0.968
제5실시예Embodiment 5 0.250 0.250 0.330 0.330 13.579 13.579 1.514 1.514
제6실시예Embodiment 6 0.350 0.350 0.450 0.450 10.295 10.295 1.524 1.524
제7실시예Embodiment 7 0.878 0.878 1.322 1.322 8.511 8.511 2.714 2.714
제8실시예Embodiment 8 0.949 0.949 1.179 1.179 5.988 5.988 2.691 2.691
제9실시예Embodiment 9 0.811 0.811 0.313 0.313 12.916 12.916 1.083 1.083
제10실시예 Embodiment 10 0.915 0.915 0.755 0.755 5.499 5.499 9.391 9.391
본 발명에 따른 촬상 광학계는 휴대 단말기(10)에 장착될 수 있다. 예를 들어, 전술된 제1실시 예 내지 제10실시 예에 따른 촬상 광학계는 도 19에 도시된 바와 같이 휴대 단말기(10)의 후면에 배치되는 제1카메라 모듈(20) 및 제2카메라 모듈(30) 중 적어도 하나를 구성하는 촬상 광학계로 사용될 수 있다. The optical system according to the present invention may be mounted on the portable terminal 10. For example, the optical system according to the first to tenth embodiments described above includes a first camera module 20 and a second camera module 20 disposed on the rear surface of the portable terminal 10 as shown in FIG. 19. It may be used as an optical system constituting at least one of 30).
본 발명은 이상에서 설명되는 실시예에만 한정되는 것은 아니며, 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자라면 이하의 특허청구범위에 기재된 본 발명의 기술적 사상의 요지를 벗어나지 않는 범위에서 얼마든지 다양하게 변경하여 실시할 수 있을 것이다.The present invention is not limited only to the embodiments described above, and those of ordinary skill in the art to which the present invention pertains, within the scope not departing from the spirit of the technical idea of the present invention described in the following claims. It can be implemented with various changes.

Claims (11)

  1. 굴절력을 갖는 제1렌즈; 및A first lens having refractive power; And
    상기 제1렌즈에 의해 입사된 빛의 결상면을 구성하는 상면;An image surface constituting an imaging surface of light incident by the first lens;
    을 포함하고,Including,
    상기 제1렌즈의 유효지름은 상기 상면의 대각길이(2Y)보다 크고,The effective diameter of the first lens is larger than the diagonal length (2Y) of the image surface,
    상기 제1렌즈의 물체 측면으로부터 상기 상면까지의 거리(TTL)는 6.5 mm 이하인 촬상 광학계.An optical system having a distance TTL of 6.5 mm or less from the object side of the first lens to the image surface.
  2. 제1항에 있어서,The method of claim 1,
    상기 제1렌즈는 정의 굴절력을 갖는 촬상 광학계.The first lens is an optical system having a positive refractive power.
  3. 제1항에 있어서,The method of claim 1,
    상기 제1렌즈는 물체 측면 및 상 측면 중 적어도 일면이 비구면 형상인 촬상 광학계.The first lens is an optical system in which at least one of an object side and an image side has an aspherical shape.
  4. 제1항에 있어서,The method of claim 1,
    상기 제1렌즈는 물체 측면이 볼록한 형상인 촬상 광학계.The first lens is an optical system having a convex object side.
  5. 제1항에 있어서,The method of claim 1,
    하기 조건식을 만족하는 촬상 광학계.An imaging optical system that satisfies the following conditional expression.
    0.7 <TTL/f < 1.20.7 <TTL/f <1.2
    (상기 조건식에서 f는 촬상 광학계의 초점거리이다)(In the above conditional formula, f is the focal length of the optical system)
  6. 제5항에 있어서,The method of claim 5,
    상기 제1렌즈의 초점거리(f1)는 하기 조건식을 만족하는 촬상 광학계.The focal length f1 of the first lens satisfies the following conditional expression.
    0.8 < f1/f < 1.10.8 <f1/f <1.1
  7. 제1항에 있어서,The method of claim 1,
    굴절력을 갖는 제2렌즈를 더 포함하는 촬상 광학계.An optical system further comprising a second lens having refractive power.
  8. 제6항에 있어서,The method of claim 6,
    상기 제1렌즈의 상 측면의 곡률 반지름(R2)과 상기 제2렌즈의 물체 측면의 곡률 반지름(R3)은 하기 조건식을 만족하는 촬상 광학계.An optical system in which a radius of curvature R2 of an image side of the first lens and a radius of curvature R3 of an object side of the second lens satisfy the following conditional expression.
    -1.0 < (R2-R3)/(R2+R3) < 1.0-1.0 <(R2-R3)/(R2+R3) <1.0
  9. 물체 측으로부터 순차적으로 배치되는 복수의 렌즈를 포함하고,Including a plurality of lenses sequentially arranged from the object side,
    하기 조건식을 만족하는 촬상 광학계.An imaging optical system that satisfies the following conditional expression.
    0.2 <TTL/f < 1.00.2 <TTL/f <1.0
    fG1/f < 2.0fG1/f <2.0
    TTL < 6.5 mmTTL <6.5 mm
    (상기 조건식에서 TTL은 물체에 가장 가까운 렌즈의 물체 측면으로부터 상면까지의 거리이고, f는 촬상 광학계의 초점거리이고, fG1은 상면에 가장 가까운 렌즈를 제외한 렌즈 군의 초점거리이다)(In the above conditional equation, TTL is the distance from the object side to the image surface of the lens closest to the object, f is the focal length of the imaging optical system, and fG1 is the focal length of the lens group excluding the lens closest to the image surface)
  10. 제9항에 있어서,The method of claim 9,
    상기 복수의 렌즈는,The plurality of lenses,
    물체에 가장 가깝게 배치되는 제1렌즈; 및A first lens disposed closest to the object; And
    상기 상면에 가장 가깝게 배치되는 제2렌즈;A second lens disposed closest to the image surface;
    를 포함하는 촬상 광학계.An optical system comprising a.
  11. 제9항에 있어서,The method of claim 9,
    상기 복수의 렌즈는, 물체 측으로부터 순차적으로 배치되는 제1렌즈, 제2렌즈, 제3렌즈를 포함하는 촬상 광학계. The plurality of lenses is an optical system including a first lens, a second lens, and a third lens that are sequentially disposed from an object side.
PCT/KR2020/005925 2019-05-06 2020-05-05 Optical imaging system WO2020226410A1 (en)

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KR10-2019-0052674 2019-05-06
KR1020190052674A KR20200128616A (en) 2019-05-06 2019-05-06 Optical Imaging System
KR10-2020-0045636 2020-04-15
KR1020200045636A KR20210127868A (en) 2020-04-15 2020-04-15 Optical Imaging System

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Citations (5)

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JP2004085725A (en) * 2002-08-23 2004-03-18 Sony Corp Imaging lens, light converging optical element, and imaging device
JP2004212467A (en) * 2002-12-27 2004-07-29 Nidec Copal Corp Photographic lens
KR20150019854A (en) * 2013-08-16 2015-02-25 삼성전기주식회사 Subminiature infrared camera module and portable device adopting the module
KR101544792B1 (en) * 2014-12-30 2015-08-18 주식회사 세코닉스 Iris lens system
KR20160071304A (en) * 2014-12-11 2016-06-21 (주)씨앤오 Iris recognition optical system having short total length

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004085725A (en) * 2002-08-23 2004-03-18 Sony Corp Imaging lens, light converging optical element, and imaging device
JP2004212467A (en) * 2002-12-27 2004-07-29 Nidec Copal Corp Photographic lens
KR20150019854A (en) * 2013-08-16 2015-02-25 삼성전기주식회사 Subminiature infrared camera module and portable device adopting the module
KR20160071304A (en) * 2014-12-11 2016-06-21 (주)씨앤오 Iris recognition optical system having short total length
KR101544792B1 (en) * 2014-12-30 2015-08-18 주식회사 세코닉스 Iris lens system

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