WO2024054094A1 - Système optique et dispositif de caméra le comprenant - Google Patents

Système optique et dispositif de caméra le comprenant Download PDF

Info

Publication number
WO2024054094A1
WO2024054094A1 PCT/KR2023/013515 KR2023013515W WO2024054094A1 WO 2024054094 A1 WO2024054094 A1 WO 2024054094A1 KR 2023013515 W KR2023013515 W KR 2023013515W WO 2024054094 A1 WO2024054094 A1 WO 2024054094A1
Authority
WO
WIPO (PCT)
Prior art keywords
lens
water side
image side
distance
optical system
Prior art date
Application number
PCT/KR2023/013515
Other languages
English (en)
Korean (ko)
Inventor
심주용
Original Assignee
엘지이노텍 주식회사
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
Application filed by 엘지이노텍 주식회사 filed Critical 엘지이노텍 주식회사
Publication of WO2024054094A1 publication Critical patent/WO2024054094A1/fr

Links

Images

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
    • G02B13/0045—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having five or more lenses
    • 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
    • G02B3/00—Simple or compound lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/0087—Simple or compound lenses with index gradient
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/02—Simple or compound lenses with non-spherical faces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
    • G02B9/62—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having six components only
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/50—Constructional details
    • H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B2003/0093—Simple or compound lenses characterised by the shape

Definitions

  • Embodiments of the present invention relate to an optical system and a camera device including the same.
  • the need for miniaturization of camera devices is growing. As the camera device becomes smaller, the amount of light reaching the image sensor through the optical system may decrease. According to this, the F number that determines the brightness of the image can be increased, and the amount of light reaching the peripheral area of the image sensor can be significantly lower than the amount of light reaching the central area of the image sensor.
  • the technical problem to be achieved by the present invention is to obtain a camera module that can be implemented in a small size, has a small F number, a large angle of view, and a high peripheral light ratio.
  • the optical system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged sequentially from the object side to the image side; , the first lens has positive refractive power, the second lens has negative refractive power, the third lens has positive refractive power, the fourth lens has negative refractive power, and the fifth lens has The sixth lens has positive refractive power, the sixth lens has negative refractive power, and the diameter of the first lens is 90% to 110% of EPD (Entrance Pupil Diameter).
  • EPD Entrance Pupil Diameter
  • the aperture may be disposed at an edge of the water side of the first lens.
  • the image side of the fifth lens is convex toward the image side
  • the water side of the sixth lens is concave toward the object
  • the distance between the image side of the fifth lens and the water side of the sixth lens reaches a predetermined distance from the optical axis. It may decrease as the distance from the optical axis increases.
  • the image side of the fifth lens is convex toward the image side
  • the water side of the sixth lens is concave toward the object
  • the maximum tilt angle of the water side of the sixth lens up to a predetermined distance from the optical axis is that of the fifth lens. It may be greater than the maximum inclination angle on the upper side of .
  • the ratio of the absolute value of the radius of curvature of the image side of the fifth lens to the absolute value of the radius of curvature of the water side of the sixth lens may be 2 to 3.
  • At least one of the water side of the second lens, the image side of the third lens, the water side of the fourth lens, the image side of the fourth lens, the water side of the fifth lens, and the image side of the sixth lens. may include a critical point.
  • the water side of the fourth lens and the image side of the fourth lens may each include a critical point.
  • the water side of the fifth lens may include a critical point.
  • the vertical distance that the critical point of the water side of the fourth lens has from the optical axis is 0.9 to 1.1 times the vertical distance that the critical point of the image side of the fourth lens has from the optical axis, and the critical point of the water side of the fifth lens is the optical axis. It may be 0.9 to 1.1 times the vertical distance from.
  • the predetermined distance may be a vertical distance between the optical axis and at least one of a critical point on the water side of the fourth lens, a critical point on the image side of the fourth lens, and a critical point on the water side of the fifth lens.
  • the F number may be 2 or less, FOV (Field Of View) may be 84 degrees or more, and RI (Relative Illumination) may be 25% or more.
  • An optical system includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens arranged sequentially from the object side to the image side.
  • the first lens has positive refractive power
  • the second lens has negative refractive power
  • the third lens has positive refractive power
  • the fourth lens has negative refractive power
  • the fifth lens has a negative refractive power.
  • the sixth lens has a negative refractive power
  • the first lens has the smallest diameter among the first to sixth lenses
  • the image side and the water side of the fifth lens each include a critical point
  • the image side of the fifth lens is convex toward the image side
  • the water side of the sixth lens is concave toward the object
  • the image side of the fifth lens is concave toward the object.
  • the absolute value of the radius of curvature is greater than the absolute value of the radius of curvature of the water side of the sixth lens.
  • the vertical distance that the critical point of the water side of the fourth lens has from the optical axis is 0.9 to 1.1 times the vertical distance that the critical point of the image side of the fourth lens has from the optical axis, and the critical point of the water side of the fifth lens is the optical axis. It may be 0.9 to 1.1 times the vertical distance from.
  • the tilt angle may be greater than the maximum tilt angle on the image side of the fifth lens.
  • a camera device includes an image sensor, a filter disposed on the image sensor, and an optical system disposed on the filter, and the optical system sequentially moves from the object side to the image side. It includes a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens, wherein the first lens has positive refractive power and the second lens has negative refractive power.
  • the third lens has positive refractive power
  • the fourth lens has negative refractive power
  • the fifth lens has positive refractive power
  • the sixth lens has negative refractive power
  • the first lens The diameter is 90% to 110% of EPD (Entrance Pupil Diameter).
  • a camera device that can be implemented in a small size, yet has a small F number, a large field of view (FOV), and a high relative illumination ratio (RI).
  • a camera device that can be implemented in a small size and has an F number of 2 or less, an FOV of 84 degrees or more, and an RI in one field of 25% or more.
  • the present invention it is possible to obtain a camera device that provides bright, high RI images while minimizing the head size exposed to the outside. That is, in order to minimize the head size exposed to the outside, the diameter of the first lens, that is, the lens disposed closest to the object, is designed to be small, and a camera device that provides bright images with high RI around the sensor can be obtained. .
  • Figure 1 shows an optical system according to an embodiment of the present invention.
  • Figure 2 shows the relationship between a first lens and an aperture in an optical system according to an embodiment of the present invention.
  • Figures 3 and 4 are diagrams for explaining the ambient light amount ratio.
  • Figure 5 is design data showing the distance between lens surfaces for each distance in the Y direction from the optical axis in an optical system according to an embodiment of the present invention.
  • Figure 6 is design data showing sag values of lens surfaces for each distance in the Y direction from the optical axis in an optical system according to an embodiment of the present invention.
  • Figure 7 is design data showing inclination angles of lens surfaces for each distance in the Y direction from the optical axis in an optical system according to an embodiment of the present invention.
  • FIG. 8 shows MTF (Modulation Transfer Function) using an optical system according to an embodiment of the present invention.
  • Figure 9 shows a distortion grid using an optical system according to an embodiment of the present invention.
  • Figure 10 is a diagram showing a portion of a portable terminal to which a camera device according to an embodiment of the present invention is applied.
  • the technical idea of the present invention is not limited to some of the described embodiments, but may be implemented in various different forms, and as long as it is within the scope of the technical idea of the present invention, one or more of the components may be optionally used between the embodiments. It can be used by combining and replacing.
  • first, second, A, B, (a), and (b) may be used.
  • a component when a component is described as being 'connected', 'coupled' or 'connected' to another component, the component is not only directly connected, coupled or connected to that other component, but also is connected to that component. It can also include cases where other components are 'connected', 'combined', or 'connected' due to another component between them.
  • “above” or “below” refers not only to cases where two components are in direct contact with each other, but also to one This also includes cases where another component described above is formed or placed between two components.
  • “top (above) or bottom (bottom)” it may include not only the upward direction but also the downward direction based on one component.
  • Figure 1 shows an optical system according to an embodiment of the present invention.
  • the optical system 100 includes a first lens 110, a second lens 120, and a third lens sequentially arranged from the object side to the image side. 130, a fourth lens 140, a fifth lens 150, and a sixth lens 160.
  • a right-angled prism may be further disposed at the front end of the first lens 110.
  • At least one of the first lens 110, the second lens 120, the third lens 130, the fourth lens 140, the fifth lens 150, and the sixth lens 160 has an effective area and an uneffective area.
  • the effective area may be an area through which light incident on the lens passes, that is, an area where the incident light is refracted to implement optical characteristics.
  • the effective diameter may mean the diameter of the effective area where effective light is incident on each surface of each lens.
  • the value of the effective diameter may have a predetermined error range.
  • the range of ⁇ 0.4 mm can be considered the effective area.
  • the range of ⁇ 0.4mm can be interpreted as the effective diameter.
  • the non-effective area is disposed around the effective area, and may be an area where light is not incident, that is, an area unrelated to optical characteristics.
  • the non-effective area may be an area fixed to a barrel accommodating a lens, etc.
  • the filter 170 and the image sensor 180 may be sequentially disposed behind the sixth lens 160.
  • the filter 170 may be an IR (infrared) filter.
  • the filter 170 may block near-infrared rays, for example, light with a wavelength of 700 nm to 1100 nm, from light incident on the camera module.
  • the filter 170 may be a filter that transmits IR rather than a filter that blocks IR.
  • the image sensor 180 may be connected to a printed circuit board.
  • the optical system 100 includes a first lens 110, a second lens 120, and a third lens sequentially arranged from the object side to the image side. 130, a fourth lens 140, a fifth lens 150, and a sixth lens 160.
  • the first lens 110, the second lens 120, the third lens 130, the fourth lens 140, the fifth lens 150, and the sixth lens 160 may be sequentially arranged along the optical axis. there is.
  • the first lens 110, second lens 120, third lens 130, fourth lens 140, fifth lens 150, and sixth lens 160 may be aspherical lenses.
  • the first lens 110, second lens 120, third lens 130, fourth lens 140, fifth lens 150, and sixth lens 160 may each be made of plastic or glass. there is.
  • the first lens 110 has positive refractive power and includes a water side 112 and an image side 114.
  • the water side 112 of the first lens 110 is convex toward the object, and the image side 114 ) may be concave upward.
  • the convex surface of the lens may mean that the lens surface of the area corresponding to the optical axis has a convex shape
  • the concave surface of the lens may mean that the lens surface of the area corresponding to the optical axis has a concave shape. can do.
  • the area corresponding to the optical axis may mean the optical axis or the paraxial region.
  • the fact that the surface of the lens is convex toward the object side means that it is concave toward the image side
  • the fact that the surface of the lens is convex toward the image side can mean that it is concave toward the object side.
  • the second lens 120 has negative refractive power and includes a water side 122 and an image side 124.
  • the water side 122 of the second lens 120 is convex toward the object, and the image side 124 ) may be concave upward.
  • the third lens 130 has positive refractive power and includes a water side 132 and an image side 134.
  • the water side 132 of the third lens 130 is convex toward the object, and the image side 134 ) may be convex upward.
  • the fourth lens 140 has negative refractive power and includes a water side 142 and an image side 144.
  • the water side 142 of the fourth lens 140 is convex toward the object, and the image side 144 ) may be concave upward.
  • the fifth lens 150 has positive refractive power and includes a water side 152 and an image side 154.
  • the water side 152 of the fifth lens 150 is convex toward the object, and the image side 154 ) may be convex upward.
  • the sixth lens 160 has negative refractive power and includes a water side 162 and an image side 164.
  • the water side 162 of the sixth lens 160 is concave toward the object, and the image side 164 ) may be concave upward.
  • the first lens 110 has positive refractive power
  • the second lens 120 has negative refractive power
  • the third lens 130 has positive refractive power
  • the fourth lens If 140 has negative refractive power
  • the fifth lens 150 has positive refractive power
  • the sixth lens 160 has negative refractive power
  • Figure 2 shows the relationship between a first lens and an aperture in an optical system according to an embodiment of the present invention.
  • the aperture ST is disposed on the first lens 110.
  • the aperture ST can control the amount of light incident on the optical system 100.
  • the aperture ST may be placed at the edge of the water side 112 of the first lens 110.
  • the aperture ST may be arranged to contact the edge of the water side 112 of the first lens 110.
  • the effective diameter (ED L1S1 ) of the first lens 110 is 90% to 110%, preferably 95% to 110%, more preferably 97% to 97% of the EPD (Entrance Pupil Diameter) of the optical system 100. It may be 110%, more preferably 100% to 110%.
  • the area where the water side 112 of the first lens 110 is exposed to the outside can be minimized, and thus the head size of the optical system 100 can be minimized.
  • light may also be incident on the edge of the water side 112 of the first lens 110.
  • the entire first lens 110 may be an effective area.
  • the water side 112 or the image side 114 of the first lens 110 has the smallest effective diameter among the first to sixth lenses 110, ..., 160.
  • the effective diameter (ED L1S1 ) of the water side 112 of the first lens 110 may be 1.62 mm to 1.98 mm, preferably 1.7 mm to 1.9 mm.
  • the effective diameter of the water side 112 of the first lens 110 may be smaller than the diagonal length of the image sensor 170.
  • the effective diameter of the water side 112 of the first lens 110 is 70% or less, preferably 50% or less, more preferably 40% or less, of the diagonal length of the image sensor 170. Preferably it may be 30% or less.
  • the first lens 110 can be manufactured and the head size of the optical system 100 can be reduced.
  • the aperture ST is disposed at the edge of the water side 112 of the first lens 110, so the EPD of the optical system 100 according to an embodiment of the present invention is 1.62 mm to 1.98 mm. , preferably 1.7mm to 1.9mm.
  • the aperture ST is placed at the edge of the water side 112 of the first lens 110, the area exposed to the outside of the optical system 100 is minimized and the amount of light incident on the first lens 110 is maximized. Therefore, the optical system 100 can be implemented in an ultra-small size.
  • a camera device including the optical system 100 according to an embodiment of the present invention may be implemented so as not to be exposed to the user's naked eye.
  • a camera device including the optical system 100 according to an embodiment of the present invention may be implemented to be placed on the front of a portable terminal.
  • a camera device including the optical system 100 according to an embodiment of the present invention may be implemented to be placed below the display.
  • the effective diameter of the first lens 110 becomes smaller, the head size exposed to the outside can be minimized.
  • the amount of light incident on the optical system 100 may not be sufficient. Accordingly, when designing an optical system including the first lens 110, the F number is reduced to brighten the image, and the ratio of the amount of light incident on the periphery of the image sensor to the amount of light incident on the center of the image sensor, that is, the peripheral light amount ratio It is necessary to consider conditions for improving (Relative Illumination, RI).
  • the center of the image sensor refers to an area close to the 0 field of the image sensor
  • the peripheral portion of the image sensor refers to an area close to the 1 field of the image sensor
  • Figures 3 and 4 are diagrams for explaining the ambient light amount ratio.
  • the area reaching the image sensor varies depending on the angle of incidence of light incident from the object side.
  • the image sensor is divided into 0 field, which is the center of the image sensor, and 1 field, which is the furthest position from the center of the image sensor.
  • the larger the angle of incidence of light the closer it reaches the 1 field area (periphery) of the image sensor, and the angle of incidence of light increases. It can be seen that the smaller it is, the closer it gets to the zero field area (center) of the image sensor.
  • the first line A is a ray parallel to the FOV (Field of View) of the optical system 100.
  • the first line A may be incident on the water side 112 of the first lens 110 so as to have an angle of ⁇ with respect to the optical axis OA of the first lens 110.
  • the angle formed between the normal line (c line) and the first line (A) at the point (P) where the first line (A) and the water side 112 of the first lens 110 contact is the incident angle ( ⁇ ). It can be defined as:
  • it is intended to reduce the F number and improve RI by using the design of the lens forming the optical system 100.
  • Tables 1 and 2 below show the optical characteristics of the lenses included in the optical system according to the embodiment of the present invention
  • Tables 3 and 4 show the aspherical coefficients of the lens included in the optical system according to the embodiment of the present invention.
  • Lens No. Lens surface No. shape critical point Radius of curvature (R, mm) Curvature (C, mm) Thickness (mm) Effective diameter (mm) first lens 112 convex radish 1.579 0.6332 0.446 1.800 114 concave radish 3.379 0.2959 0.262 1.795 second lens 122 convex you 6.653 0.1503 0.230 1.823 124 concave radish 3.531 0.2832 0.057 2.007 third lens 132 convex radish 5.140 0.1945 0.406 2.197 134 convex you -26.137 -0.0383 0.327 2.206 4th lens 142 convex you 2.831 0.3532 0.230 2.508 144 concave you 2.618 0.3819 0.321 2.855 5th lens 152 convex you 3.921 0.2551 0.511 2.965 154 convex radish -2.941 -0.3400 0.558 3.584 6th lens 162 concave radish -1
  • first lens second lens third lens Lens surface No. 112 114 122 124 132 134 Koenig's constant -0.024 -1.943 41.160 -7.060 -1.648 84.468 4th order 2.83E-03 -4.95E-03 -1.48E-01 -6.76E-02 2.72E-02 -3.39E-02 6th order 1.21E-02 3.73E-03 -1.92E-02 -5.99E-03 -1.40E-02 1.96E-02 8th order -1.98E-03 -1.24E-02 2.69E-03 9.45E-03 8.13E-03 1.63E-03 10th order 2.55E-03 1.04E-02 9.65E-04 7.66E-03 1.90E-03 -4.39E-03 12th order 6.14E-03 9.59E-03 -1.44E-02 1.64E-03 3.15E-03 1.01E-03 14th order 5.61E-03 -4.53E-03 -2.00E-
  • thickness (mm) represents the distance from each lens surface to the next lens surface.
  • the thickness described on the water side 112 of the first lens 110 represents the distance from the water side 112 to the image side 114 of the first lens 110.
  • thickness may mean center thickness.
  • the center thickness may refer to the thickness at the optical axis.
  • the thickness described on the water side 112 of the first lens 110 may represent the distance between the center of curvature of the water side 112 and the center of curvature of the image side 114 in the first lens 110.
  • the thickness written on the water side of each lens may refer to the central thickness of each lens.
  • the thickness written on the image side 114 of the first lens 110 represents the distance from the image side 114 of the first lens 110 to the water side 122 of the second lens 120. Specifically, the thickness described on the image side 114 of the first lens 110 is between the center of curvature of the image side 114 of the first lens 110 and the center of curvature of the water side 122 of the second lens 120. indicates distance. For convenience of explanation, the thickness written on the image side of each lens may refer to the distance on the optical axis between two adjacent lenses.
  • the first lens 110, the second lens 120, and the third lens 130 are referred to as the first lens group (G1), and the fourth lens 140 , the fifth lens 150 and the sixth lens 160 may be referred to as the second lens group (G2).
  • the second lens 120 or the fourth lens 140 may have the smallest central thickness among the first to sixth lenses.
  • the fifth lens 150 may have the largest central thickness among the first to sixth lenses.
  • the central thickness of the fifth lens 150 may be at least twice the central thickness of the fourth lens 140, and preferably 2 to 3 times. According to this, assembly and alignment of the first to sixth lenses are easy.
  • the distance on the optical axis between the second lens 120 and the third lens 130 may be the shortest inter-lens distance among the first to sixth lenses.
  • the distance on the optical axis between the fifth lens 150 and the sixth lens 160 may be the longest inter-lens distance among the first to sixth lenses.
  • the distance on the optical axis between the second lens 120 and the third lens 130, the distance on the optical axis between the first lens 110 and the second lens 120, and the fourth lens ( The distance on the optical axis between 140) and the fifth lens 150, the distance on the optical axis between the third lens 130 and the fourth lens 140, and the distance on the optical axis between the fifth lens 150 and the sixth lens 160 It can increase in order of distance.
  • the distance on the optical axis between the fifth lens 150 and the sixth lens 160 may be 1.6 to 2.6 times, preferably 1.9 to 2.3 times the distance on the optical axis between the first lens 110 and the second lens 120.
  • the distance on the optical axis between the second lens 120 and the third lens 130, and the distance between the third lens 130 and the fourth lens 140 It may be 1.5 to 2.5 times the distance on the optical axis, preferably 1.6 to 2 times, and 1.5 to 2.5 times the distance on the optical axis between the fourth lens 140 and the fifth lens 150, preferably 1.6 to 2 times. It could be a boat.
  • the first lens group G1 plays the role of light collection and chromatic aberration correction, and 2
  • the lens group (G2) can play a role in spreading light evenly to each pixel to the periphery of the image sensor. That is, according to an embodiment of the present invention, the effective diameter of the water side 112 of the first lens 110 is designed to be smaller than that of the image sensor 180 in order to reduce the head size of the optical system 100. When the gap between lenses in the first lens group G1 satisfies these conditions, light can be collected without distortion even when the effective diameter of the water side 112 of the first lens 110 is sufficiently small.
  • the gap between the first lens group (G) and the second lens group (G2) and the gap between the lenses in the second lens group (G2) satisfy these conditions, that is, the lenses in the first lens group (G1)
  • the light collected by the first lens group G1 may pass through the second lens group G2 and evenly reach each pixel of the image sensor 180 without distortion.
  • the first lens 110, the second lens 120, and the third lens 130 have positive composite power
  • the fourth lens 140, the fifth lens 150, and The sixth lens 160 has negative composite power. That is, the combined power of the first lens 110, the second lens 120, and the third lens 130 is 0.23, and the composite power of the fourth lens 140, the fifth lens 150, and the sixth lens 160 is 0.23.
  • the composite power is -0.06.
  • the first lens 110, the second lens 120, and the third lens 130 serve to collect light incident on the water side of the first lens 110, and the fourth lens 140
  • the fifth lens 150 and the sixth lens 160 spread light from the water side 142 of the fourth lens 140 to the image side 164 of the sixth lens 160, thereby forming the image sensor 180. It can play a role in reaching each pixel of .
  • the first lens 110 has positive power
  • the second lens 120 has negative power
  • the absolute value of the power (P2) of the second lens 120 is twice or more
  • the center thickness (CT1) of the first lens 110 is 1.5 times or more than the center thickness (CT2) of the second lens 120.
  • the first lens 110 collects light incident on the optical system 100, and the second lens 120 can correct chromatic aberration.
  • the distance on the optical axis between the fifth lens 150 and the sixth lens 160 included in the second lens group (G1) has the longest inter-lens distance among the first to sixth lenses, and the second lens group (G1)
  • the second lens group G2 may serve to spread light more evenly to the periphery of the image sensor. there is.
  • the TTL which is the distance from the water side 112 of the first lens 110 to the image sensor 180, is 4 mm to 4.5 mm, and the water side 122 of the second lens 120
  • the distance from the image sensor 180 is 3.6424mm
  • the distance from the water side 132 of the third lens 130 to the image sensor 180 is 3.3554mm
  • the water side 142 of the fourth lens 140 The distance from the image sensor 180 is 2.6227mm
  • the distance from the water side 152 of the fifth lens 150 to the image sensor 180 is 2.0716mm
  • the water side 162 of the sixth lens 160 The distance from the image sensor 180 is 1.0032mm.
  • BFL which is the distance from the image side surface 164 of the sixth lens 160 to the image sensor 180, is 0.6 mm or more.
  • the diagonal length (2*H imageD ) of the image sensor 180 is 6.538mm.
  • BFL should be implemented at 0.6 mm or more from the point of view of those skilled in the art.
  • the BFL in the case of a camera device with an autofocusing function, the BFL must be 0.7mm or more for assembly of the optical system and image sensor, and if the optical system includes a circular asymmetric lens, the BFL must be 0.7mm or more. It must be implemented.
  • the optical system 100 can be implemented in an ultra-small size and can be built into the front as well as the back of the portable terminal.
  • the maximum effective diameter of the lens included in the first lens group G1 may be smaller than the minimum effective diameter of the lens included in the second lens group G2.
  • the effective diameter may mean the diameter of the effective area on the water side or the upper side where light is incident.
  • the distance on the optical axis between the lenses included in the first lens group (G1) for example, the distance on the optical axis between the image side 114 of the first lens 110 and the water side 122 of the second lens 120
  • the distance (0.262mm) and the distance (0.057mm) on the optical axis between the image side 124 of the second lens 120 and the water side 132 of the third lens 130 are the distance between the first lens group G1 and the second lens group G1.
  • the distance on the optical axis between the two lens groups (G2) is smaller than the distance on the optical axis between the image side 134 of the third lens 130 and the water side 142 of the fourth lens 140, and the second lens group
  • the distance on the optical axis between the lenses included in (G2) for example, the distance on the optical axis between the image side 144 of the fourth lens 140 and the water side 152 of the fifth lens 150 and the fifth lens It is smaller than the distance on the optical axis between the image side 154 of (150) and the water side 162 of the sixth lens 160.
  • the effective diameters of the fourth lens 140, the fifth lens 150, and the sixth lens 160 may gradually increase from the object side to the image side.
  • the effective diameter (ED L4S2 ) of the image side 144 of the fourth lens 140 is larger than the effective diameter (ED L4S1 ) of the water side 142 of the fourth lens 140
  • the fifth lens 150 The effective diameter (ED L5S1 ) of the water side 152 is larger than the effective diameter (ED L4S2 ) of the image side 144 of the fourth lens 140
  • the effective diameter (ED) of the image side 154 of the fifth lens 150 L5S2 ) is larger than the effective diameter (ED L5S1 ) of the water side 152 of the fifth lens 150
  • the effective diameter (ED L6S1 ) of the water side 162 of the sixth lens 160 is that of the fifth lens 150.
  • the maximum effective diameter (ED G1_max ) of the lens included in the first lens group (G1) is 0.7 times or less, preferably 0.6 times or less, than the effective diameter (ED L6S2 ) of the image side 164 of the sixth lens 160. , more preferably 0.5 times or less.
  • the first lens group G1 serves to collect light incident on the optical system 100 and can adjust the angle of incidence incident on the second lens group G2. Additionally, the second lens group G2 serves to disperse the light incident on the second lens group G2 after passing through the first lens group G1, thereby reducing the amount of light reaching the periphery of the image sensor 180. can increase.
  • Figure 5 is design data showing the distance between lens surfaces for each distance in the Y direction from the optical axis in an optical system according to an embodiment of the present invention
  • Figure 6 is design data showing the distance between lens surfaces for each distance in the Y direction from the optical axis in an optical system according to an embodiment of the present invention.
  • This is design data showing the sag value of the surfaces
  • Figure 7 is design data showing the inclination angle of the lens surfaces for each distance in the Y direction from the optical axis in the optical system according to the embodiment of the present invention.
  • L1, L2, L3, L4, L5, and L6 are the first lens 110, the second lens 120, the third lens 130, the fourth lens 140, and the fifth lens, respectively.
  • L1S1, L1S2, L2S1, L2S2, L3S1, L3S2, L4S1, L4S2, L5S1, L5S2, L6S1, L6S2 are each the water side 112 of the first lens 110. ), image side 114, water side 122 of the second lens 120, image side 124, water side 132 of the third lens 130, image side 134, fourth lens ( Water side 142, image side 144 of 140, water side 152, image side 154 of the fifth lens 150, water side 162, image side of the sixth lens 160 ( 164).
  • the air between L1 and L2 represents the distance between the first lens 110 and the second lens 120
  • the air between L2 and L3 represents the distance between the second lens 120 and the third lens 130
  • the air between L3 and L4 represents the distance between the third lens 130 and the fourth lens 140
  • the air between L4 and L5 represents the distance between the fourth lens 140 and the fifth lens 150
  • Air between L5 and L6 represents the distance between the fifth lens 150 and the sixth lens 160.
  • the distance between the image side 114 of the first lens 110 and the water side 122 of the second lens 120 is from the optical axis to the end of the image side 114 of the first lens 110.
  • the end of the surface of the lens may mean the end of the effective area of the surface of the lens.
  • the optical axis may mean a point where the distance in the Y direction is 0.
  • the ratio of the maximum distance to the minimum distance between the opposing surfaces of different lenses from the optical axis to the end of the lens surface is 3 times or less, the distance between the opposing surfaces of the different lenses is maintained uniformly. It can be interpreted as being.
  • the minimum distance between the image side 114 of the first lens 110 and the water side 122 of the second lens 120 from the optical axis to the end of the image side 114 of the first lens 110 (The ratio of the maximum distance (T12 max ) to T12 min ) may be 3 times or less, preferably 2 times or less.
  • the distance between the image side 124 of the second lens 120 and the water side 132 of the third lens 130 is uniform from the optical axis to the end of the image side 124 of the first lens 120. can be maintained. That is, the minimum distance between the image side 124 of the second lens 120 and the water side 132 of the third lens 130 from the optical axis to the end of the image side 124 of the second lens 120 ( The ratio of the maximum distance (T23 max ) to T23 min ) may be 3 times or less.
  • the distance between the image side 134 of the third lens 130 and the water side 142 of the fourth lens 140 is uniform from the optical axis to the end of the image side 134 of the third lens 130. can be maintained. That is, the minimum distance between the image side 134 of the third lens 130 and the water side 142 of the fourth lens 140 from the optical axis to the end of the image side 134 of the third lens 130 ( The ratio of the maximum distance (T34 max ) to T34 min ) may be 3 times or less, preferably 2 times or less, and more preferably 1.5 times or less.
  • At least one surface of at least one of the first to sixth lenses forming the optical system 100 includes a critical point.
  • the critical point may mean a point at which the trend of the sag value changes.
  • the sag value means the distance on the optical axis between any point on the lens surface and a point on the optical axis.
  • the point where the trend of the sag value changes may be a point where the sag value increases and then decreases or a point where it decreases and then increases.
  • the critical point may mean a point at which the slope angle becomes 0.
  • the tilt angle can be defined as the angle formed between the normal to the tangent of the lens surface and the optical axis.
  • At least one of the six surfaces of the first lens 110, the second lens 120, and the third lens 130 includes a critical point.
  • the water side 122 of the second lens 120 and the image side 134 of the third lens 130 include a critical point. Light is refracted more effectively near the critical point. That is, light passing through a lens surface including a critical point can be refracted more effectively than light passing through a lens surface not including a critical point. In this way, if at least one of the six surfaces of the first lens 110, the second lens 120, and the third lens 130 includes a critical point, the water of the first lens 110 is reduced to minimize the head size.
  • the first lens (The light incident through the effective diameter of the water side 112 of 110) can be refracted in the widest possible range between the first to third lenses, and the light can evenly reach the peripheral pixels of the image sensor 180, The performance of the optical system 100 can be improved.
  • the critical point of the water side 122 of the second lens 120 may be a point having a vertical distance of 0.5 mm to 0.6 mm from the optical axis.
  • the critical point of the water side 122 of the second lens 120 is about 55% to 67% when the optical axis is the starting point and the end point of the water side 122 of the second lens 120 is the end point. It can be placed at the % position.
  • the end of the surface of the lens may mean the end of the effective area of the surface of the lens, and the position of the critical point may be a position set based on the direction perpendicular to the optical axis.
  • the critical point of the image side surface 134 of the third lens 130 may be a point having a distance of 1 mm to 1.1 mm from the optical axis.
  • the critical point of the image side 134 of the third lens 130 is about 90% to 100% when the optical axis is the starting point and the end point of the image side 134 of the third lens 130 is the end point. It can be placed at the % position.
  • the critical point of the image side surface 134 of the third lens 130 uses the optical axis as the starting point and the end point of the image side surface 134 of the third lens 130 as the end point, the critical point is about 90% to 100%. When placed in this position, light near the edge of the image side surface 134 of the third lens 130 can be spread more evenly.
  • At least three of the six surfaces of the fourth lens 140, the fifth lens 150, and the sixth lens 160 include critical points.
  • the water side 142 and the image side 144 of the fourth lens 140, the water side 152 of the fifth lens 150, and the image side of the sixth lens 160 ( 164) may include critical points. Light is refracted more effectively near the critical point. If a critical point exists at the periphery of the image side 164 of the sixth lens 160, which is the lens surface closest to the image sensor 180, the light effectively refracted at the image side 164 of the sixth lens 160 will produce an image. It is easy to evenly reach the peripheral pixels of the sensor 180.
  • the assemblage of the optical system 100 may be improved compared to when a critical point exists on the water side. Even if the sixth lens 160 is slightly tilted during assembly, it does not affect the assembly of the first to fifth lenses of the optical system 100 and does not significantly affect optical performance, thereby improving the assembling of the optical system 100. You can.
  • the tilt of the assembly is the remaining lens, the second lens. This affects the second lens and the sixth lens, greatly deteriorating the performance of the optical system.
  • the image side 154 of the fifth lens 150 and the water side 162 of the sixth lens 160 may not include a critical point.
  • both the water side 142 and the image side 144 of the fourth lens 140 may have critical points.
  • the critical point of the water side 142 of the fourth lens 140 may be a point having a distance of 0.8 mm to 0.9 mm from the optical axis.
  • the critical point of the water side 142 of the fourth lens 140 is about 64% to 72% when the optical axis is the starting point and the end point of the water side 142 of the fourth lens 140 is the end point. It can be placed at the % position.
  • the critical point of the image side 144 of the fourth lens 140 may be a point having a distance of 0.8 mm to 0.9 mm from the optical axis.
  • the critical point of the image side 144 of the fourth lens 140 is about 56% to 64% when the optical axis is the starting point and the end point of the image side 144 of the fourth lens 140 is the end point. It can be placed at the % position.
  • the distance that the critical point of the water side 142 of the fourth lens 140 has from the optical axis is 0.9 to 1.1 of the distance that the critical point of the image side 144 of the fourth lens 140 has from the optical axis. times, preferably 0.95 to 1.05 times, more preferably 0.97 to 1.3 times, and even more preferably 0.99 to 1.01 times.
  • the distance that the critical point has from the optical axis may mean a distance perpendicular to the optical axis.
  • the critical point of the water side 152 of the fifth lens 150 may be a point having a distance of 0.8 mm to 0.9 mm from the optical axis.
  • the critical point of the water side 152 of the fifth lens 150 is about 53% to 60% when the optical axis is the starting point and the end point of the water side 152 of the fifth lens 150 is the end point. It can be placed at the % position.
  • the distance that the critical point of the water side 142 of the fourth lens 140 has from the optical axis is 0.9 to 1.1 of the distance that the critical point of the water side 152 of the fifth lens 150 has from the optical axis.
  • the critical point of the water side 142 of the fourth lens 140, the critical point of the image side 144 of the fourth lens 140, and the critical point of the water side 152 of the fifth lens 150 satisfy these conditions. In this case, it serves to disperse the light incident on the second lens group (G2) after passing through the first lens group (G1), thereby increasing the amount of light reaching the periphery of the image sensor 180.
  • the critical point of the water side 142 of the fourth lens 140, the critical point of the image side 144 of the fourth lens 140, and the water side 152 of the fifth lens 150 The critical points are located continuously, there is no critical point on the image side 154 of the fifth lens 150 and the water side 162 of the sixth lens 160, and there is no critical point on the image side 164 of the sixth lens 160. There is a critical point.
  • the critical point of the image side 164 of the sixth lens 160 may be a point having a distance of 0.6 mm to 0.7 mm from the optical axis.
  • the critical point of the image side surface 164 of the sixth lens 160 is about 24% to 29% when the optical axis is the starting point and the end point of the image side surface 164 of the sixth lens 160 is the end point. It can be placed at the % position.
  • the distance T45 between the image side 144 of the fourth lens 140 and the water side 152 of the fifth lens 150 is set from the optical axis OA to the fourth lens ( It can be maintained uniformly up to the end of the upper side 144 of 140). That is, the minimum distance between the image side 144 of the fourth lens 140 and the water side 152 of the fifth lens 150 from the optical axis to the end of the image side 144 of the fourth lens 140 ( The ratio of the maximum distance (T45 max ) to T45 min ) may be 3 times or less, preferably 2 times or less.
  • the distance T56 between the image side 154 of the fifth lens 150 and the water side 162 of the sixth lens 160 is the end of the image side 154 of the fifth lens 150 from the optical axis. It can change drastically. According to an embodiment of the present invention, the distance T56 between the image side 154 of the fifth lens 150 and the water side 162 of the sixth lens 160 is the distance from the optical axis to the image side of the fifth lens 150. It can decrease as you move away from the optical axis until it reaches the end of (154). As described above, the end of the lens surface may mean the end of the effective diameter.
  • the ratio of the maximum distance (T56 max ) to the minimum distance (T56 min ) between the image side 154 of the fifth lens 150 and the water side 162 of the sixth lens 160 May be greater than 3 times, preferably greater than 4 times, more preferably greater than 5 times, and even more preferably greater than 10 times.
  • the point having the minimum distance (T56 min ) between the image side 154 of the fifth lens 150 and the water side 162 of the sixth lens 160 is the fifth lens 150. It may be the end of the image side 154, that is, the end of the effective diameter of the image side 154 of the fifth lens 150, or a point within a predetermined distance from the end of the effective diameter.
  • the predetermined distance may be ⁇ 0.4 mm.
  • the tilt angle change pattern of the image side 154 of the fifth lens 150 and the tilt angle change pattern of the water side 162 of the sixth lens 160 may be different.
  • the critical point of the water side 142 of the fourth lens 140, the critical point of the image side 144 of the fourth lens 140, and the critical point of the fifth lens 150 may all be arranged to have a similar vertical distance from the optical axis. That is, the distance of the critical point of the water side 142 of the fourth lens 140 from the optical axis is 0.9 to 1.1 times the distance of the critical point of the image side 144 of the fourth lens 140 from the optical axis, preferably 0.95.
  • the distance from the optical axis of the critical point of the water side 152 of the fifth lens 150 may be 0.95 to 1.05 times, more preferably 0.97 to 1.3 times, and even more preferably 0.99 to 1.01 times.
  • the critical point of the water side 142 of the fourth lens 140, the critical point of the image side 144 of the fourth lens 140, and the water side 152 of the fifth lens 150 Within the vertical distance between at least one of the critical points and the optical axis, for example, the tilt angle at the water side 162 of the sixth lens 160 is steeper than the tilt angle at the image side 154 of the fifth lens 150. It can change a lot.
  • the maximum tilt angle on the water side 162 of the sixth lens 160 up to a point having a vertical distance between the optical axis and the critical point of the water side 152 of the fifth lens 150 is the fifth lens ( It may be greater than the maximum tilt angle at the upper side 154 of 150).
  • the optical axis The maximum tilt angle on the water side 162 of the sixth lens 160 is at least 2 times, preferably 2.5 times, up to a point having a vertical distance between the critical point of the water side 152 of the fifth lens 150. It could be more than that.
  • the tilt angle on the water side 162 of the sixth lens 160 ranges from 0 to 35 degrees to a point where there is a vertical distance between the optical axis and the critical point of the water side 152 of the fifth lens 150.
  • the tilt angle on the image side 154 of the fifth lens 150 may range from 0 to 17.5 degrees. If the image side 154 of the fifth lens 150 and the water side 162 of the sixth lens 160 have this inclination angle, the water side 142 and the image side 144 of the fourth lens 140 , the light bent through the water side 152 of the fifth lens 150 can be uniformly dispersed on the image side 154 of the fifth lens 150 and the water side 162 of the sixth lens 160. .
  • the maximum tilt angle may be 65 degrees or less within a range of 60 to 90% of the effective diameter of the image side 164 of the sixth lens 160. According to this, manufacturing performance can be improved while satisfying optical performance.
  • the image side 154 of the fifth lens 150 is convex toward the image side, and the water side 162 of the sixth lens 160 is concave toward the object.
  • the absolute value of the radius of curvature of the image side 154 may be greater than the absolute value of the radius of curvature of the water side 162 of the sixth lens 160.
  • the absolute value of the radius of curvature of the image side 154 of the fifth lens 150 may be more than twice the absolute value of the radius of curvature of the water side 162 of the sixth lens 160. More preferably, the absolute value of the radius of curvature of the image side 154 of the fifth lens 150 may be two to three times the absolute value of the radius of curvature of the water side 162 of the sixth lens 160.
  • the image side 154 of the fifth lens 150 and the water side 162 of the sixth lens 160 are designed to satisfy these conditions, the light incident on the fifth lens 150 is transmitted through the fifth lens ( 150) and the sixth lens 160, the amount of light reaching the periphery of the image sensor 180 can be increased.
  • the optical system 100 according to an embodiment of the present invention may satisfy at least one of the conditional expressions described below. Accordingly, the optical system 100 according to an embodiment of the present invention may have an optically improved effect.
  • the optical system 100 according to an embodiment of the present invention has an effective focal length (EFL) of 3.5950 mm under the condition that the half value (H imageD ) of the diagonal length of the pixel area of the image sensor 180 is 3.2690 mm, The F number is 2 or less, the diagonal FOV is 84 degrees or more, and optical performance with an RI of 25% or more in 1 field can be obtained.
  • ETL effective focal length
  • ED L1S1 is the effective diameter of the water side 112 of the first lens 110
  • EPD Entrance Pupil Diameter
  • the area where the water side 112 of the first lens 110 is exposed to the outside can be minimized, and thus the head size of the optical system 100 can be minimized.
  • light may also be incident on the edge of the water side 112 of the first lens 110.
  • the entire first lens 110 may be an effective area.
  • H imageD is half the diagonal length of the pixel area of the image sensor 170. According to this, the area where the water side 112 of the first lens 110 is exposed to the outside can be minimized, and thus the head size of the optical system 100 can be minimized.
  • the head size of the optical system 100 can be minimized.
  • the head size of the optical system 100 can be minimized.
  • CT5 is the central thickness of the fifth lens 150
  • CT4 is the central thickness of the fourth lens 140. According to this, assembly and alignment of the optical system are easy.
  • T23 is the distance between the second lens 120 and the third lens 130
  • T12 is the distance between the first lens 110 and the second lens 120
  • T45 is the distance between the fourth lens 140 and the third lens 130
  • 5 is the distance between the lenses 150
  • T34 is the distance between the third lens 130 and the fourth lens 140
  • T56 is the distance between the fifth lens 150 and the sixth lens 160.
  • the assembly and alignment of the optical system is easy, and even when the effective diameter of the water side 112 of the first lens 110 is sufficiently small, light can be collected without distortion through the first lens group G1, and the first lens group G1
  • the light collected by the lens group G1 may pass through the second lens group G2 and evenly reach each pixel of the image sensor 180 without distortion.
  • the assembly and alignment of the optical system is easy, and even when the effective diameter of the water side 112 of the first lens 110 is sufficiently small, light can be collected without distortion through the first lens group G1, and the first lens group G1
  • the light collected by the lens group G1 may pass through the second lens group G2 and evenly reach each pixel of the image sensor 180 without distortion.
  • assembly and alignment of the optical system are easy, and light incident on the second lens group G2 can pass through the second lens group G2 and evenly reach each pixel of the image sensor 180 without distortion.
  • assembly and alignment of the optical system are easy, and light incident on the second lens group G2 can pass through the second lens group G2 and evenly reach each pixel of the image sensor 180 without distortion.
  • the first lens 110 collects light incident on the optical system 100, and the second lens 120 can correct chromatic aberration.
  • the first lens 110 collects light incident on the optical system 100, and the second lens 120 can correct chromatic aberration.
  • TTL is the distance from the water side 112 of the first lens 110 to the image sensor 180. If the TTL is less than 4mm, manufacturability may be poor and it may be difficult to implement a desirable effective focal length, and if the TTL is more than 4.5mm, the size of the camera device will increase, making it difficult to implement it in an ultra-small format in a portable terminal.
  • BFL is the distance from the image side 164 of the sixth lens 160 to the image sensor 180. According to this, the assemblability of the optical system can be increased.
  • EFL is the effective focal length. According to this, high-resolution images can be obtained even within a small space.
  • the head size of the optical system 100 and the overall size of the camera device can be miniaturized.
  • ED G1_max is the maximum effective diameter in the first lens group
  • ED G2_min is the minimum effective diameter in the second lens group.
  • the first lens group G1 serves to collect light incident on the optical system 100 and can adjust the angle of incidence incident on the second lens group G2.
  • the second lens group G2 serves to disperse the light incident on the second lens group G2 after passing through the first lens group G1, thereby reducing the amount of light reaching the periphery of the image sensor 180. can increase.
  • ED L4S1 is the effective diameter of the water side 142 of the fourth lens 140
  • ED L4S2 is the effective diameter of the image side 144 of the fourth lens 140
  • ED L5S1 is the effective diameter of the water side 142 of the fourth lens 140.
  • ED L5S2 is the effective diameter of the image side 154 of the fifth lens 150
  • ED L6S1 is the effective diameter of the water side 162 of the sixth lens 160
  • ED L6S2 is the effective diameter of the water side 162 of the sixth lens 160.
  • This is the effective diameter of the image side 164 of the sixth lens 160.
  • the second lens group (G2) serves to disperse the light incident on the second lens group (G2) after passing through the first lens group (G1), thereby reaching the periphery of the image sensor 180. The amount of light can be increased.
  • the first lens group G1 serves to collect light incident on the optical system 100 and can adjust the angle of incidence incident on the second lens group G2.
  • the second lens group G2 serves to disperse the light incident on the second lens group G2 after passing through the first lens group G1, thereby reducing the amount of light reaching the periphery of the image sensor 180. can increase.
  • ED G1_max /ED L6S2 ⁇ 0.6.
  • T12 max is the maximum distance between the image side 114 of the first lens 110 and the water side 122 of the second lens 120
  • T12 min is the image side 114 of the first lens 110. It is the minimum distance between and the water side 122 of the second lens 120. According to this, light can reach from the image side 114 of the first lens 110 to the water side 122 of the second lens 120 without spreading.
  • T23 max is the maximum distance between the image side 124 of the second lens 120 and the water side 132 of the third lens 130
  • T23 min is the image side 124 of the second lens 120. It is the minimum distance between and the water side 132 of the third lens 130. According to this, light can reach from the image side 124 of the second lens 120 to the water side 132 of the third lens 130 without spreading.
  • T34 max is the maximum distance between the image side 134 of the third lens 130 and the water side 142 of the fourth lens 140
  • T34 min is the image side 134 of the third lens 130. It is the minimum distance between and the water side 142 of the fourth lens 140. According to this, light can reach from the image side 134 of the third lens 130 to the water side 142 of the fourth lens 140 without spreading.
  • T34 max /T34 min ⁇ 2.
  • T_CP L4S1 is the distance from the optical axis of the critical point of the water side 142 of the fourth lens 140
  • T_CP L4S2 is the distance from the optical axis of the critical point of the image side 144 of the fourth lens 140. According to this, it serves to disperse the light incident on the second lens group (G2) after passing through the first lens group (G1), thereby increasing the amount of light reaching the periphery of the image sensor 180.
  • the light effectively refracted at the critical point of the water side 142 of the fourth lens 140 is effectively refracted again at the critical point of the image side 144 of the fourth lens 140, thereby maximizing the effective refraction effect of light.
  • T_CP L5S1 is the distance that the critical point of the water side 152 of the fifth lens 150 has from the optical axis. According to this, it serves to efficiently refract and disperse the light incident on the second lens group (G2) after passing through the first lens group (G1), thereby increasing the amount of light reaching the periphery of the image sensor 180. there is.
  • the light effectively refracted at the critical point of the water side 142 of the fourth lens 140 is effectively refracted again at the critical point of the water side 152 of the fifth lens 150, thereby maximizing the effective refraction effect of light.
  • T45 max is the maximum distance between the image side 144 of the fourth lens 140 and the water side 152 of the fifth lens 150
  • T45 min is the image side 144 of the fourth lens 140. It is the minimum distance between and the water side 152 of the fifth lens 150. According to this, assembly and alignment of the optical system are easy.
  • T56 max is the maximum distance between the image side 154 of the fifth lens 150 and the water side 162 of the sixth lens 160
  • T56 min is the image side 154 of the fifth lens 150. It is the minimum distance between and the water side 162 of the sixth lens 160. According to this, the light incident on the fifth lens 150 can be dispersed through the fifth lens 150 and the sixth lens 160, and the amount of light reaching the periphery of the image sensor 180 can be increased. Preferably, 4 ⁇ T56 max /T56 min .
  • SA L5S2_max may be the maximum tilt angle of the image side 154 of the fifth lens 150
  • SA L6S1_max may be the maximum tilt angle of the water side 162 of the sixth lens 160.
  • This condition can be satisfied in an area where the vertical distance to the optical axis is within T_CP L4S1 , T_CP L4S2 , or T_CP L5S1 .
  • the light incident on the fifth lens 150 can be dispersed through the fifth lens 150 and the sixth lens 160, and the amount of light reaching the periphery of the image sensor 180 can be increased, While satisfying optical performance, manufacturing performance can be improved.
  • this condition can be satisfied in an area where the vertical distance to the optical axis is within T_CP L4S1 , T_CP L4S2 , or T_CP L5S1 .
  • the light incident on the fifth lens 150 can be dispersed through the fifth lens 150 and the sixth lens 160, and the amount of light reaching the periphery of the image sensor 180 can be increased, While satisfying optical performance, manufacturing performance can be improved.
  • SA L6S1 is the inclination angle of the water side 162 of the sixth lens 160, and this condition can be satisfied in an area where the vertical distance from the optical axis is within T_CP L4S1 , T_CP L4S2 , or T_CP L5S1 .
  • the light incident on the fifth lens 150 can be dispersed through the fifth lens 150 and the sixth lens 160, and the amount of light reaching the periphery of the image sensor 180 can be increased, While satisfying optical performance, manufacturing performance can be improved.
  • SA L5S2 is the inclination angle of the image side surface 154 of the fifth lens 150, and this condition can be satisfied in an area where the vertical distance from the optical axis is within T_CP L4S1 , T_CP L4S2 , or T_CP L5S1 .
  • the light incident on the fifth lens 150 can be dispersed through the fifth lens 150 and the sixth lens 160, and the amount of light reaching the periphery of the image sensor 180 can be increased, While satisfying optical performance, manufacturing performance can be improved.
  • R L6S1 is the radius of curvature of the water side 162 of the sixth lens 160
  • R L5S2 is the radius of curvature of the image side 154 of the fifth lens 150. According to this, the light incident on the fifth lens 150 can be efficiently dispersed through the fifth lens 150 and the sixth lens 160.
  • the light incident on the fifth lens 150 can be efficiently dispersed through the fifth lens 150 and the sixth lens 160.
  • Table 5 shows CRA (Chief Ray Angle) data and RI values for each field that can be obtained using an optical system according to an embodiment of the present invention
  • Figure 8 shows MTF (Modulation Transfer) data using an optical system according to an embodiment of the present invention.
  • Function shows a distortion grid using an optical system according to an embodiment of the present invention.
  • the angle of the main ray (CRA) in the optical system according to the embodiment of the present invention is 8 degrees or more, for example, in the range of 8 degrees to 37 degrees, and the amount of light in the center (0 field) of the image sensor is 100%. It can be seen that the amount of light in the peripheral area (1 field) of the image sensor is more than 25%.
  • the clarity of the image can be obtained at a spatial frequency according to the pixel that can be obtained from the optical system according to an embodiment of the present invention, and referring to FIG. 9, the clarity of the image can be obtained from the optical system according to an embodiment of the present invention. You can see the degree of distortion of the image.
  • Figure 10 is a diagram showing a portion of a portable terminal to which a camera device according to an embodiment of the present invention is applied.
  • the optical system 100 according to an embodiment of the present invention may be applied to the camera device 1000.
  • the camera device 1000 including the optical system 100 according to an embodiment of the present invention may be built into a portable terminal and may be applied together with the main camera module.
  • the camera device 1000 according to an embodiment of the present invention may include an image sensor, a filter disposed on the image sensor, and an optical system 100 disposed on the filter.
  • the optical system 100 according to an embodiment of the present invention may include the first lens 110, second lens 120, third lens 130, fourth lens 140, and fifth lens 150 described above.
  • a portable terminal equipped with a camera device including an optical system according to an embodiment of the present invention may be a smartphone, tablet PC, laptop computer, PDA, etc.
  • the optical system 100 may be placed on the front or back of the mobile terminal, or may be placed below the display of the mobile terminal.
  • the optical system 100 may be sequentially arranged in the lateral direction of the mobile terminal due to thickness restrictions of the mobile terminal.
  • a right-angled prism may be further disposed at the front end of the first lens 110.
  • It may be a smartphone, tablet PC, laptop computer, PDA, etc.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Lenses (AREA)

Abstract

Un système optique selon un mode de réalisation de la présente invention comprend une première lentille, une deuxième lentille, une troisième lentille, une quatrième lentille, une cinquième lentille et une sixième lentille disposées séquentiellement d'un côté objet à un côté image, la première lentille ayant une réfringence positive, la deuxième lentille ayant une réfringence négative, la troisième lentille ayant une réfringence positive, la quatrième lentille ayant une réfringence négative, la cinquième lentille ayant une réfringence positive et la sixième lentille ayant une réfringence négative, et le diamètre de la première lentille étant de 90 % à 110 % du diamètre de pupille d'entrée (EPD).
PCT/KR2023/013515 2022-09-08 2023-09-08 Système optique et dispositif de caméra le comprenant WO2024054094A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020220114294A KR20240035162A (ko) 2022-09-08 2022-09-08 광학계 및 이를 포함하는 카메라 장치
KR10-2022-0114294 2022-09-08

Publications (1)

Publication Number Publication Date
WO2024054094A1 true WO2024054094A1 (fr) 2024-03-14

Family

ID=90191597

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2023/013515 WO2024054094A1 (fr) 2022-09-08 2023-09-08 Système optique et dispositif de caméra le comprenant

Country Status (2)

Country Link
KR (1) KR20240035162A (fr)
WO (1) WO2024054094A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015072405A (ja) * 2013-10-04 2015-04-16 コニカミノルタ株式会社 撮像レンズ、撮像装置及び携帯端末
KR20150058972A (ko) * 2013-11-21 2015-05-29 삼성전자주식회사 촬상 렌즈 시스템 및 이를 채용한 촬상 장치
US20160313538A1 (en) * 2015-04-24 2016-10-27 Sekonix Co., Ltd. Photographic Lens System Enabling Reduction in Tightness of Manufacturing Tolerance
KR20190028798A (ko) * 2016-08-01 2019-03-19 애플 인크. 이미징 렌즈 시스템
KR20220048335A (ko) * 2020-10-12 2022-04-19 삼성전기주식회사 촬상 광학계

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015072405A (ja) * 2013-10-04 2015-04-16 コニカミノルタ株式会社 撮像レンズ、撮像装置及び携帯端末
KR20150058972A (ko) * 2013-11-21 2015-05-29 삼성전자주식회사 촬상 렌즈 시스템 및 이를 채용한 촬상 장치
US20160313538A1 (en) * 2015-04-24 2016-10-27 Sekonix Co., Ltd. Photographic Lens System Enabling Reduction in Tightness of Manufacturing Tolerance
KR20190028798A (ko) * 2016-08-01 2019-03-19 애플 인크. 이미징 렌즈 시스템
KR20220048335A (ko) * 2020-10-12 2022-04-19 삼성전기주식회사 촬상 광학계

Also Published As

Publication number Publication date
KR20240035162A (ko) 2024-03-15

Similar Documents

Publication Publication Date Title
WO2016003211A1 (fr) Objectif photographique et appareil photographique
WO2010077050A2 (fr) Objectif hypergone
WO2022124850A1 (fr) Système optique et module de caméra le comprenant
WO2016140526A1 (fr) Objectif de formation d'image et module de caméra l'intégrant
WO2021201568A1 (fr) Système optique et module de caméra le comprenant
WO2022045690A1 (fr) Système optique et module de caméra le comprenant
WO2021071320A1 (fr) Lentille d'imagerie
WO2023018233A1 (fr) Système optique et module de caméra le comprenant
WO2015190783A1 (fr) Objectif grand-angle
WO2023003365A1 (fr) Système optique, et module optique et module de caméra le comprenant
WO2021215807A1 (fr) Système optique et module de caméra le comprenant
WO2024054094A1 (fr) Système optique et dispositif de caméra le comprenant
WO2022035134A1 (fr) Système optique
WO2024054095A1 (fr) Système optique et dispositif de caméra le comprenant
WO2023085870A1 (fr) Système optique et module de caméra le comprenant
WO2023277651A1 (fr) Système optique et module de caméra le comprenant
WO2023106858A1 (fr) Système optique et module de caméra le comprenant
WO2024054093A1 (fr) Système optique et dispositif de caméra le comprenant
WO2023075466A1 (fr) Système optique et module de caméra le comprenant
WO2022265452A2 (fr) Système optique et module de caméra le comprenant
WO2023282727A1 (fr) Système optique et module de caméra le comprenant
WO2022265455A1 (fr) Système optique et module de caméra le comprenant
WO2023113565A1 (fr) Système optique et module de caméra le comprenant
WO2024072072A1 (fr) Système optique et dispositif de caméra le comprenant
WO2022124856A1 (fr) Système optique et module de caméra le comprenant

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 23863558

Country of ref document: EP

Kind code of ref document: A1