WO2021119893A1 - Lentille optique photographique - Google Patents

Lentille optique photographique Download PDF

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Publication number
WO2021119893A1
WO2021119893A1 PCT/CN2019/125500 CN2019125500W WO2021119893A1 WO 2021119893 A1 WO2021119893 A1 WO 2021119893A1 CN 2019125500 W CN2019125500 W CN 2019125500W WO 2021119893 A1 WO2021119893 A1 WO 2021119893A1
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Prior art keywords
lens
imaging optical
curvature
ttl
radius
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PCT/CN2019/125500
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English (en)
Chinese (zh)
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马力
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诚瑞光学(常州)股份有限公司
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Priority to PCT/CN2019/125500 priority Critical patent/WO2021119893A1/fr
Publication of WO2021119893A1 publication Critical patent/WO2021119893A1/fr

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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

Definitions

  • the present invention relates to the field of optical lenses, in particular to an imaging optical lens suitable for portable terminal equipment such as smart phones and digital cameras, as well as imaging devices such as monitors and PC lenses.
  • the photosensitive devices of general photographic lenses are nothing more than photosensitive coupling devices (Charge Coupled Device, CCD) or complementary metal oxide semiconductor devices (Complementary Metal).
  • CCD Charge Coupled Device
  • CMOS Sensor complementary metal oxide semiconductor devices
  • the pixel size of photosensitive devices has been reduced, and the development trend of current electronic products with good functions, thin and short appearance, therefore, has a good
  • the miniaturized camera lens with image quality has become the mainstream in the current market.
  • the lenses traditionally mounted on mobile phone cameras mostly adopt a three-element or four-element lens structure.
  • the system's requirements for image quality continue to increase, five-element, six-element, and seven-element lens structures Gradually appearing in lens design.
  • the common six-element lens has good optical performance, its optical power, lens spacing and lens shape settings are still unreasonable, resulting in the lens structure having good optical performance At the same time, it cannot meet the design requirements of large aperture, ultra-thin, and long focal length.
  • the object of the present invention is to provide an imaging optical lens, which has good optical performance while meeting the design requirements of large aperture, ultra-thinness, and long focal length.
  • an embodiment of the present invention provides an imaging optical lens.
  • the imaging optical lens includes, in order from the object side to the image side, a first lens having a positive refractive power, and a second lens having a negative refractive power.
  • Two lenses a third lens with negative refractive power, a fourth lens with positive refractive power, a fifth lens with negative refractive power, and a sixth lens with positive refractive power;
  • the focal length of the imaging optical lens is f
  • the focal length of the fourth lens is f4
  • the Abbe number of the first lens is v1
  • the Abbe number of the second lens is v2, and the following relationship is satisfied: 2.80 ⁇ v1/v2 ⁇ 4.50; 4.00 ⁇ f4/f ⁇ 20.00.
  • the radius of curvature of the object side surface of the sixth lens is R11
  • the radius of curvature of the image side surface of the sixth lens is R12
  • the following relationship is satisfied: 5.00 ⁇ (R11+R12)/(R11-R12) ⁇ 20.00 .
  • the focal length of the fifth lens is f5, and satisfies the following relationship: -1.20 ⁇ f5/f ⁇ -0.50.
  • the focal length of the first lens is f1
  • the radius of curvature of the object side of the first lens is R1
  • the radius of curvature of the image side of the first lens is R2
  • the on-axis thickness of the first lens is d1
  • the total optical length of the camera optical lens is TTL, and satisfies the following relationship: 0.21 ⁇ f1/f ⁇ 0.66; -1.85 ⁇ (R1+R2)/(R1-R2) ⁇ -0.56; 0.09 ⁇ d1/TTL ⁇ 0.29.
  • the focal length of the second lens is f2
  • the radius of curvature of the object side of the second lens is R3
  • the radius of curvature of the image side of the second lens is R4, and the on-axis thickness of the second lens is d3
  • the total optical length of the camera optical lens is TTL, and satisfies the following relationship: -2.09 ⁇ f2/f ⁇ -0.62; -0.39 ⁇ (R3+R4)/(R3-R4) ⁇ 0.86; 0.02 ⁇ d3/TTL ⁇ 0.05.
  • the focal length of the third lens is f3, the radius of curvature of the object side of the third lens is R5, the radius of curvature of the image side of the third lens is R6, and the on-axis thickness of the third lens is d5 ,
  • the total optical length of the camera optical lens is TTL, and satisfies the following relationship: -3.43 ⁇ f3/f ⁇ -0.49; -1.33 ⁇ (R5+R6)/(R5-R6) ⁇ -0.01; 0.02 ⁇ d5/ TTL ⁇ 0.07.
  • the radius of curvature of the object side of the fourth lens is R7
  • the radius of curvature of the image side of the fourth lens is R8,
  • the axial thickness of the fourth lens is d7
  • the total optical length of the imaging optical lens is TTL, and satisfies the following relationship: 2.51 ⁇ (R7+R8)/(R7-R8) ⁇ 29.92; 0.02 ⁇ d7/TTL ⁇ 0.05.
  • the radius of curvature of the object side surface of the fifth lens is R9
  • the radius of curvature of the image side surface of the fifth lens is R10
  • the axial thickness of the fifth lens is d9
  • the total optical length of the imaging optical lens is TTL, and satisfies the following relationship: -5.83 ⁇ (R9+R10)/(R9-R10) ⁇ -0.80; 0.02 ⁇ d9/TTL ⁇ 0.05.
  • the focal length of the sixth lens is f6, the axial thickness of the sixth lens is d11, the total optical length of the imaging optical lens is TTL, and the following relationship is satisfied: 1.12 ⁇ f6/f ⁇ 7.66; 0.06 ⁇ d11/TTL ⁇ 0.20.
  • the total optical length of the camera optical lens is TTL, and satisfies the following relationship: f/TTL ⁇ 1.24.
  • the imaging optical lens according to the present invention has excellent optical characteristics, and has the characteristics of large aperture, long focal length, and ultra-thin. It is especially suitable for high-pixel CCD, CMOS and other imaging elements. Mobile phone camera lens assembly and WEB camera lens.
  • FIG. 1 is a schematic diagram of the structure of an imaging optical lens according to a first embodiment of the present invention
  • FIG. 2 is a schematic diagram of axial aberration of the imaging optical lens shown in FIG. 1;
  • FIG. 3 is a schematic diagram of the chromatic aberration of magnification of the imaging optical lens shown in FIG. 1;
  • FIG. 4 is a schematic diagram of field curvature and distortion of the imaging optical lens shown in FIG. 1;
  • FIG. 5 is a schematic diagram of the structure of an imaging optical lens according to a second embodiment of the present invention.
  • FIG. 6 is a schematic diagram of axial aberration of the imaging optical lens shown in FIG. 5;
  • FIG. 7 is a schematic diagram of the chromatic aberration of magnification of the imaging optical lens shown in FIG. 5;
  • FIG. 8 is a schematic diagram of field curvature and distortion of the imaging optical lens shown in FIG. 5;
  • FIG. 9 is a schematic diagram of the structure of an imaging optical lens according to a third embodiment of the present invention.
  • FIG. 10 is a schematic diagram of axial aberration of the imaging optical lens shown in FIG. 9;
  • FIG. 11 is a schematic diagram of the chromatic aberration of magnification of the imaging optical lens shown in FIG. 9;
  • FIG. 12 is a schematic diagram of field curvature and distortion of the imaging optical lens shown in FIG. 9.
  • FIG. 1 shows an imaging optical lens 10 according to a first embodiment of the present invention.
  • the imaging optical lens 10 includes six lenses. Specifically, the imaging optical lens 10 includes in order from the object side to the image side: an aperture S1, a first lens L1, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, and a sixth lens. Lens L6.
  • An optical element such as an optical filter GF may be provided between the sixth lens L6 and the image plane Si.
  • the first lens L1 has positive refractive power
  • the second lens L2 has negative refractive power
  • the third lens L3 has negative refractive power
  • the fourth lens L4 has positive refractive power
  • the fifth lens L5 has negative refractive power
  • the sixth lens L6 has Positive refractive power.
  • the Abbe number of the first lens L1 is defined as v1
  • the Abbe number of the second lens L2 is defined as v2, which satisfies the following relationship: 2.80 ⁇ v1/v2 ⁇ 4.50, which specifies the first
  • the ratio of the Abbe number of the second lens in this range is more conducive to the development of ultra-thinness, and at the same time conducive to correcting aberrations.
  • 2.84 ⁇ v1/v2 ⁇ 4.35 is satisfied.
  • the focal length of the imaging optical lens 10 is defined as f, and the focal length of the fourth lens L4 is f4, which satisfies the following relationship: 4.00 ⁇ f4/f ⁇ 20.00, which specifies the ratio of the focal length of the fourth lens to the total focal length.
  • the reasonable distribution of focal power makes the system have better imaging quality and lower sensitivity.
  • 4.03 ⁇ f4/f ⁇ 19.96 is satisfied.
  • the radius of curvature of the object side surface of the sixth lens L6 as R11
  • the radius of curvature of the image side surface of the sixth lens L6 as R12
  • the shape of the sixth lens is specified, and when it is within this range, it is helpful to correct the aberration of the off-axis angle of view.
  • 5.02 ⁇ (R11+R12)/(R11-R12) ⁇ 19.99 is satisfied.
  • the focal length of the fifth lens L5 is defined as f5, which satisfies the following relational formula: -1.20 ⁇ f5/f ⁇ -0.50, which specifies the ratio of the fifth lens focal length to the total focal length.
  • f5 The focal length of the fifth lens L5
  • -1.20 ⁇ f5/f ⁇ -0.50 which specifies the ratio of the fifth lens focal length to the total focal length.
  • the system has Better imaging quality and lower sensitivity.
  • -1.19 ⁇ f5/f ⁇ -0.53 is satisfied.
  • the focal length of the first lens is defined as f1, which satisfies the following relationship: 0.21 ⁇ f1/f ⁇ 0.66, which specifies the ratio of the positive refractive power of the first lens L1 to the overall focal length.
  • the first lens has an appropriate positive refractive power, which is beneficial to reduce system aberrations.
  • 0.33 ⁇ f1/f ⁇ 0.52 is satisfied.
  • the curvature radius of the object side surface of the first lens L1 is R1
  • the curvature radius of the image side surface of the first lens L1 is R2, which satisfies the following relationship: -1.85 ⁇ (R1+R2)/(R1-R2) ⁇ -0.56 ,
  • -1.16 ⁇ (R1+R2)/(R1-R2) ⁇ -0.70 is satisfied.
  • the axial thickness of the first lens L1 is d1
  • the total optical length of the imaging optical lens 10 is TTL, which satisfies the following relationship: 0.09 ⁇ d1/TTL ⁇ 0.29.
  • it is beneficial to realize ultra-thinness Preferably, 0.15 ⁇ d1/TTL ⁇ 0.23 is satisfied.
  • the focal length of the overall imaging optical lens 10 as f
  • the focal length of the second lens L2 as f2
  • the focal length of the second lens L2 which satisfies the following relationship: -2.09 ⁇ f2/f ⁇ -0.62
  • the negative refractive power of the second lens L2 is controlled at A reasonable range is conducive to correcting the aberration of the optical system.
  • it satisfies -1.31 ⁇ f2/f ⁇ -0.78.
  • the curvature radius of the object side surface of the second lens L2 is R3, and the curvature radius of the image side surface of the second lens L2 is R4, which satisfies the following relationship: -0.39 ⁇ (R3+R4)/(R3-R4) ⁇ 0.86,
  • the shape of the second lens L2 is specified, and when it is within the range, it is beneficial to correct the problem of axial chromatic aberration.
  • -0.25 ⁇ (R3+R4)/(R3-R4) ⁇ 0.68 is satisfied.
  • the on-axis thickness of the second lens L2 is d3, and the total optical length of the imaging optical lens 10 is TTL, which satisfies the following relationship: 0.02 ⁇ d3/TTL ⁇ 0.05. Within the range of the conditional formula, it is beneficial to realize ultra-thinness . Preferably, 0.03 ⁇ d3/TTL ⁇ 0.04 is satisfied.
  • the focal length of the overall imaging optical lens 10 as f
  • the focal length of the third lens L3 as f3
  • f3 which satisfies the following relationship: -3.43 ⁇ f3/f ⁇ -0.49.
  • the reasonable distribution of optical power makes the system better High imaging quality and low sensitivity.
  • it satisfies -2.14 ⁇ f3/f ⁇ -0.61.
  • the curvature radius of the object side surface of the third lens L3 is R5, and the curvature radius of the image side surface of the third lens L3 is R6, which satisfies the following relationship: -1.33 ⁇ (R5+R6)/(R5-R6) ⁇ -0.01, which is specified
  • the shape of the third lens is within the range specified by the conditional formula, which can alleviate the degree of deflection of light passing through the lens and effectively reduce aberrations.
  • -0.83 ⁇ (R5+R6)/(R5-R6) ⁇ -0.01 is satisfied.
  • the axial thickness of the third lens L3 is d5, and the total optical length of the imaging optical lens 10 is TTL, which satisfies the following relationship: 0.02 ⁇ d5/TTL ⁇ 0.07. Within the range of the conditional expression, it is beneficial to realize ultra-thinness . Preferably, 0.03 ⁇ d5/TTL ⁇ 0.06 is satisfied.
  • the radius of curvature of the object side surface of the fourth lens L4 as R7
  • the radius of curvature of the image side surface of the fourth lens L4 as R8, and satisfy the following relationship: 2.51 ⁇ (R7+R8)/(R7-R8) ⁇ 29.94.
  • the shape of the fourth lens L4 is specified, and when it is within the range, it is beneficial to correct problems such as aberrations of the off-axis angle of view. Preferably, 4.02 ⁇ (R7+R8)/(R7-R8) ⁇ 23.93 is satisfied.
  • the axial thickness of the fourth lens L4 is d7, and the total optical length of the imaging optical lens 10 is TTL, which satisfies the following relationship: 0.02 ⁇ d7/TTL ⁇ 0.05. Within the range of the conditional expression, it is beneficial to achieve ultra-thinness . Preferably, 0.02 ⁇ d7/TTL ⁇ 0.04 is satisfied.
  • the radius of curvature of the object side surface of the fifth lens L5 is defined as R9, and the radius of curvature of the image side surface of the fifth lens L5 is R10, and the following relationship is satisfied: -5.83 ⁇ (R9+R10)/(R9-R10) ⁇ -0.80, which specifies the shape of the fifth lens L5.
  • R9 The radius of curvature of the object side surface of the fifth lens L5
  • R10 The radius of curvature of the image side surface of the fifth lens L5
  • -5.83 ⁇ (R9+R10)/(R9-R10) ⁇ -0.80 which specifies the shape of the fifth lens L5.
  • it is helpful to correct the aberrations of the off-axis angle of view.
  • it satisfies -3.65 ⁇ (R9+R10)/(R9-R10) ⁇ -1.00.
  • the on-axis thickness of the fifth lens L5 is d9, and the total optical length of the imaging optical lens 10 is TTL, which satisfies the following relationship: 0.02 ⁇ d9/TTL ⁇ 0.05. Within the range of the conditional expression, it is beneficial to achieve ultra-thinness . Preferably, 0.02 ⁇ d9/TTL ⁇ 0.04 is satisfied.
  • the focal length of the overall imaging optical lens 10 as f
  • the focal length of the sixth lens L6 as f6, which satisfies the following relationship: 1.12 ⁇ f6/f ⁇ 7.66.
  • the reasonable distribution of optical power enables the system to have better imaging Quality and low sensitivity.
  • 1.80 ⁇ f6/f ⁇ 6.13 is satisfied.
  • the axial thickness of the sixth lens L6 is d11, and the total optical length of the imaging optical lens 10 is TTL, which satisfies the following relationship: 0.06 ⁇ d11/TTL ⁇ 0.20. Within the range of the conditional formula, it is beneficial to realize ultra-thinness . Preferably, 0.10 ⁇ d11/TTL ⁇ 0.16 is satisfied.
  • the focal length of the imaging optical lens 10 is f
  • the total optical length of the imaging optical lens 10 is TTL, and the following relationship is satisfied: f/TTL ⁇ 1.24, thereby achieving ultra-thinness.
  • the imaging optical lens 10 can meet the design requirements of large aperture, long focal length, and ultra-thinness while having good optical performance. According to the characteristics of the optical lens 10, the optical lens 10 is particularly suitable for high-end cameras. Mobile phone camera lens assembly and WEB camera lens composed of CCD, CMOS and other imaging elements for pixels.
  • the imaging optical lens 10 of the present invention will be described below with an example.
  • the symbols described in each example are as follows.
  • the unit of focal length, distance on axis, radius of curvature, thickness on axis, position of inflection point, and position of stagnation point is mm.
  • TTL total optical length (the on-axis distance from the object side of the first lens L1 to the imaging surface), the unit is mm;
  • the object side and/or the image side of the lens can also be provided with inflection points and/or stagnation points to meet high-quality imaging requirements.
  • inflection points and/or stagnation points for specific implementations, refer to the following.
  • Table 1 and Table 2 show design data of the imaging optical lens 10 according to the first embodiment of the present invention.
  • R The radius of curvature of the optical surface, and the radius of curvature of the center of the lens
  • R1 the radius of curvature of the object side surface of the first lens L1;
  • R2 the radius of curvature of the image side surface of the first lens L1;
  • R3 the radius of curvature of the object side surface of the second lens L2;
  • R4 the radius of curvature of the image side surface of the second lens L2;
  • R5 the radius of curvature of the object side surface of the third lens L3;
  • R6 the radius of curvature of the image side surface of the third lens L3;
  • R7 the radius of curvature of the object side of the fourth lens L4;
  • R8 the radius of curvature of the image side surface of the fourth lens L4;
  • R9 the radius of curvature of the object side surface of the fifth lens L5;
  • R10 the radius of curvature of the image side surface of the fifth lens L5;
  • R11 the radius of curvature of the object side surface of the sixth lens L6;
  • R12 the radius of curvature of the image side surface of the sixth lens L6;
  • R13 the radius of curvature of the object side surface of the optical filter GF
  • R14 the radius of curvature of the image side surface of the optical filter GF
  • d0 the on-axis distance from the aperture S1 to the object side of the first lens L1;
  • d2 the on-axis distance from the image side surface of the first lens L1 to the object side surface of the second lens L2;
  • d4 the on-axis distance from the image side surface of the second lens L2 to the object side surface of the third lens L3;
  • d6 the on-axis distance from the image side surface of the third lens L3 to the object side surface of the fourth lens L4;
  • d10 the on-axis distance from the image side surface of the fifth lens L5 to the object side surface of the sixth lens L6;
  • d11 the on-axis thickness of the sixth lens L6;
  • d12 the on-axis distance from the image side surface of the sixth lens L6 to the object side surface of the optical filter GF;
  • d14 the on-axis distance from the image side surface of the optical filter GF to the image surface
  • nd refractive index of d-line
  • nd1 the refractive index of the d-line of the first lens L1;
  • nd2 the refractive index of the d-line of the second lens L2;
  • nd3 the refractive index of the d-line of the third lens L3;
  • nd4 the refractive index of the d-line of the fourth lens L4;
  • nd5 the refractive index of the d-line of the fifth lens L5;
  • nd6 the refractive index of the d-line of the sixth lens L6;
  • ndg the refractive index of the d-line of the optical filter GF
  • vg Abbe number of optical filter GF.
  • Table 2 shows the aspheric surface data of each lens in the imaging optical lens 10 according to the first embodiment of the present invention.
  • k is the conic coefficient
  • A4, A6, A8, A10, A12, A14, A16, A18, A20 are aspherical coefficients.
  • the aspheric surface of each lens surface uses the aspheric surface shown in the above formula (1).
  • the present invention is not limited to the aspheric polynomial form represented by the formula (1).
  • Table 3 and Table 4 show the design data of the inflection point and stagnation point of each lens in the imaging optical lens 10 of the first embodiment of the present invention.
  • P1R1 and P1R2 represent the object side and image side of the first lens L1 respectively
  • P2R1 and P2R2 represent the object side and image side of the second lens L2 respectively
  • P3R1 and P3R2 represent the object side and image side of the third lens L3 respectively.
  • P4R1, P4R2 represent the object side and image side of the fourth lens L4
  • P5R1, P5R2 represent the object side and the image side of the fifth lens L5
  • P6R1, P6R2 represent the object side and the image side of the sixth lens L6, respectively.
  • the corresponding data in the “reflection point position” column is the vertical distance from the reflex point set on the surface of each lens to the optical axis of the imaging optical lens 10.
  • the data corresponding to the “stationary point position” column is the vertical distance from the stationary point set on the surface of each lens to the optical axis of the imaging optical lens 10.
  • FIG. 2 and 3 respectively show schematic diagrams of axial aberration and chromatic aberration of magnification after light having wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, 470 nm, and 430 nm pass through the imaging optical lens 10 of the first embodiment.
  • Fig. 4 shows a schematic diagram of field curvature and distortion of light with a wavelength of 555 nm after passing through the imaging optical lens 10 of the first embodiment.
  • the field curvature S in Fig. 4 is the field curvature in the sagittal direction, and T is the field curvature in the meridional direction. song.
  • Table 13 shows the values corresponding to the various values in each of Examples 1, 2, and 3 and the parameters that have been specified in the conditional expressions.
  • the first embodiment satisfies various conditional expressions.
  • the imaging optical lens has an entrance pupil diameter of 3.007mm, a full field of view image height of 2.040mm, a diagonal field of view of 30.84°, a long focal length, ultra-thin, and its axis,
  • the off-axis chromatic aberration is fully corrected and has excellent optical characteristics.
  • the second embodiment is basically the same as the first embodiment, and the meaning of the symbols is the same as that of the first embodiment, and only the differences are listed below.
  • Table 5 and Table 6 show design data of the imaging optical lens 20 according to the second embodiment of the present invention.
  • Table 6 shows the aspheric surface data of each lens in the imaging optical lens 20 according to the second embodiment of the present invention.
  • Table 7 and Table 8 show the design data of the inflection point and stagnation point of each lens in the imaging optical lens 20 according to the second embodiment of the present invention.
  • FIG. 6 and 7 respectively show schematic diagrams of axial aberration and chromatic aberration of magnification after light having wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, 470 nm, and 430 nm pass through the imaging optical lens 20 of the second embodiment.
  • FIG. 8 shows a schematic diagram of field curvature and distortion after light with a wavelength of 555 nm passes through the imaging optical lens 20 of the second embodiment.
  • the second embodiment satisfies various conditional expressions.
  • the imaging optical lens has an entrance pupil diameter of 3.007mm, a full field of view image height of 2.040mm, a diagonal field of view of 30.84°, a long focal length, ultra-thin, and its axis,
  • the off-axis chromatic aberration is fully corrected and has excellent optical characteristics.
  • the third embodiment is basically the same as the first embodiment, and the meaning of the symbols is the same as that of the first embodiment, and only the differences are listed below.
  • Table 9 and Table 10 show design data of the imaging optical lens 30 according to the third embodiment of the present invention.
  • Table 10 shows the aspheric surface data of each lens in the imaging optical lens 30 according to the third embodiment of the present invention.
  • Table 11 and Table 12 show the inflection point and stagnation point design data of each lens in the imaging optical lens 30 of the third embodiment of the present invention.
  • FIG. 10 and 11 respectively show schematic diagrams of axial aberration and chromatic aberration of magnification after light having wavelengths of 650 nm, 610 nm, 555 nm, 510 nm, 470 nm, and 430 nm pass through the imaging optical lens 30 of the third embodiment.
  • FIG. 12 shows a schematic diagram of field curvature and distortion after light with a wavelength of 555 nm passes through the imaging optical lens 30 of the third embodiment.
  • the imaging optical lens has an entrance pupil diameter of 3.007mm, a full field of view image height of 2.040mm, a diagonal field of view of 30.80°, a long focal length, ultra-thin, and its axis,
  • the off-axis chromatic aberration is fully corrected and has excellent optical characteristics.
  • Example 1 Example 2
  • Example 3 v1/v2 4.20 2.88 3.62 f4/f 4.05 19.92 7.38 f 7.366 7.366 7.366 f1 3.218 3.024 3.108 f2 -7.691 -6.867 -6.864 f3 -5.432 -12.616 -10.067 f4 29.846 146.718 54.324 f5 -8.690 -4.181 -5.123 f6 37.605 16.529 23.200 f12 4.258 4.271 4.278 Fno 2.45 2.45 2.45
  • Fno is the aperture F number of the imaging optical lens.

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Abstract

L'invention concerne une lentille optique photographique (10). La lentille optique photographique (10) comprend dans l'ordre du côté objet au côté image : une première lentille (L1) ayant une réfringence positive, une deuxième lentille (L2) ayant une réfringence négative, une troisième lentille (L3) ayant une réfringence négative, une quatrième lentille (L4) ayant une réfringence positive, une cinquième lentille (L5) ayant une réfringence négative et une sixième lentille (L6) ayant une réfringence positive ; la distance focale de la lentille optique photographique (10) est f, la distance focale de la quatrième lentille (L4) est f4, le nombre d'Abbe de la première lentille (L1) est v1 et le nombre d'Abbe de la deuxième lentille (L2) est v2, et les relations suivantes sont satisfaites : 2,80 ≤ v1/v2 ≤ 4,50 et 4,00 ≤ f4/f ≤ 20,00. La lentille optique photographique (10) présente de bonnes performances optiques et satisfait les exigences de conception de grande ouverture, de grande distance focale et d'ultra-minceur.
PCT/CN2019/125500 2019-12-16 2019-12-16 Lentille optique photographique WO2021119893A1 (fr)

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CN110568590A (zh) * 2019-09-25 2019-12-13 福建福光天瞳光学有限公司 一种星光级光学镜头及其成像方法

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