CN114706191A - Large-target-surface large-aperture side-view optical system and camera module applying same - Google Patents

Large-target-surface large-aperture side-view optical system and camera module applying same Download PDF

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Publication number
CN114706191A
CN114706191A CN202210319918.7A CN202210319918A CN114706191A CN 114706191 A CN114706191 A CN 114706191A CN 202210319918 A CN202210319918 A CN 202210319918A CN 114706191 A CN114706191 A CN 114706191A
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lens
optical system
equal
target
convex
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Inventor
汪鸿飞
刘振庭
尹小玲
刘洪海
杨文冠
赵治平
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Guangdong Hongjing Optoelectronics Technology Co Ltd
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Guangdong Hongjing Optoelectronics Technology Co Ltd
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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
    • 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
    • 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
    • G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
    • G02B13/006—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element at least one element being a compound optical element, e.g. cemented elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B30/00—Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles

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  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
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Abstract

The embodiment of the invention discloses a large-target-surface large-aperture side-viewing optical system, which sequentially comprises the following components from an object plane to an image plane along an optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens; the object surface side of the first lens is a convex surface, the image surface side of the first lens is a concave surface, and the focal power of the first lens is negative; the object surface side of the second lens is a convex surface, and the focal power of the second lens is positive; the third lens is a biconcave lens, and the focal power of the third lens is negative; the fourth lens, the fifth lens and the seventh lens are all double-convex lenses, and the focal powers of the double-convex lenses are all positive; the object plane side of the sixth lens is a concave surface, and the focal power of the sixth lens is negative. On the other hand, the embodiment of the invention also provides a camera module. The optical system and the camera module of the embodiment of the invention mainly comprise 7 lenses, the number of the lenses is reasonable, and the structure is simple; different lenses are combined with each other and the focal power is reasonably distributed, so that the aberration of the lens is optimized, and the lens has good chromatic aberration performance and excellent temperature characteristic.

Description

Large-target-surface large-aperture side-view optical system and camera module applying same
The technical field is as follows:
the invention relates to an optical system and a camera module applied by the same, in particular to a large-target-surface large-aperture side-looking optical system and a camera module applied by the same.
Background art:
along with the increasing application of vehicle-mounted camera lens in the field of automatic driving of automobiles, the whole solution of using the imaging system carrying the vehicle-mounted camera lens to replace the traditional rearview mirror is proposed by a car factory to solve the problems that the rearview mirror cannot clearly see a coming car at the rear under the rain and snow weather condition and the like. However, the existing vehicle-mounted optical system or camera module generally has the defects of large number of lenses and complex structure.
The invention content is as follows:
in order to solve the problems of a large number of lenses and a complex structure of the conventional vehicle-mounted optical system or camera module, the embodiment of the invention provides a large-target-surface large-aperture side-viewing optical system on the one hand.
The utility model provides a big diaphragm of big target surface looks sideways at optical system, includes from the object plane to image plane along the optical axis in proper order: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens;
the object surface side of the first lens is a convex surface, the image surface side of the first lens is a concave surface, and the focal power of the first lens is negative;
the object surface side of the second lens is a convex surface, and the focal power of the second lens is positive;
the object plane side of the third lens is a concave surface, the image plane side of the third lens is a concave surface, and the focal power of the third lens is negative;
the object surface side of the fourth lens is a convex surface, the image surface side of the fourth lens is a convex surface, and the focal power of the fourth lens is positive;
the object surface side of the fifth lens is a convex surface, the image surface side of the fifth lens is a convex surface, and the focal power of the fifth lens is positive;
the object plane side of the sixth lens is a concave surface, and the focal power of the sixth lens is negative;
the seventh lens element has a convex object surface side and a convex image surface side, and has positive power.
On the other hand, the embodiment of the invention also provides a camera module.
A camera module at least comprises an optical lens, wherein the large target surface and large aperture side-viewing optical system is arranged in the optical lens.
The optical system and the camera module of the embodiment of the invention mainly comprise 7 lenses, the number of the lenses is reasonable, and the structure is simple; different lenses are combined with each other and reasonably distributed with focal power, the lens aberration is optimized, the lens has good chromatic aberration performance and excellent temperature characteristic (-40 ℃ to +105 ℃), and the use of a chip with more than 3 million pixels can be met.
Description of the drawings:
in order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of an optical system or a camera module according to the present invention;
FIG. 2 is a diagram of relative illumination of an optical system or camera module according to an embodiment of the present invention;
FIG. 3 is a distortion curve diagram of an embodiment of an optical system or camera module of the present invention;
FIG. 4 is a CRA graph of an embodiment of an optical system or camera module of the present invention;
FIG. 5 is another schematic structural diagram of an embodiment of an optical system or a camera module according to the invention;
fig. 6 is a schematic structural diagram of an optical system or a camera module according to another embodiment of the present invention.
The specific implementation mode is as follows:
in order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
When embodiments of the present invention refer to the ordinal numbers "first", "second", etc., it should be understood that the words are used for distinguishing between them unless the context clearly dictates otherwise.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, an embodiment of the present invention provides a large-target-surface large-aperture side-viewing optical system, which sequentially includes, from an object plane to an image plane 9 along an optical axis: a first lens 1, a second lens 2, a third lens 3, a fourth lens 4, a fifth lens 5, a sixth lens 6, and a seventh lens 7.
The object surface side of the first lens 1 is a convex surface, the image surface side is a concave surface, and the focal power is negative;
the object surface side of the second lens 2 is a convex surface, the image surface side is a convex surface, and the focal power is positive;
the object plane side of the third lens 3 is a concave surface, the image plane side is a concave surface, and the focal power is negative;
the object surface side of the fourth lens element 4 is a convex surface, the image surface side is a convex surface, and the focal power thereof is positive;
the fifth lens element 5 has a convex object surface side and a convex image surface side, and has positive focal power;
the object plane side of the sixth lens 6 is a concave surface, the image plane side is a concave surface, and the focal power thereof is negative;
the seventh lens element 7 has a convex object surface side and a convex image surface side, and has positive power.
The optical system and the camera module of the embodiment of the invention mainly comprise 7 lenses, the number of the lenses is reasonable, and the structure is simple; different lenses are combined with each other and reasonably distributed with focal power, the lens aberration is optimized, the lens has good chromatic aberration performance and excellent temperature characteristic (-40 ℃ to +105 ℃), and the use of a chip with more than 3 million pixels can be met. After the optical system or the camera module is matched with the heating system, the problem of clear imaging under the rain and snow weather condition can be solved.
Further, as another preferred embodiment of the present invention, but not limited thereto, the fifth lens and the sixth lens are cemented with each other to form a combined lens, and the power of the combined lens is negative. The structure is simple and compact, the volume is small, and good optical performance can be ensured.
Still further, as another preferred embodiment of the present invention, but not limited thereto, the focal length f2 of the second lens and the focal length f3 of the third lens satisfy: i f2/f 3I > 0.9. Simple structure and can ensure good optical performance.
Still further, as another preferred embodiment of the present invention, but not limited thereto, the focal length f3 of the third lens and the focal length f4 of the fourth lens satisfy: i f4/f 3I > 0.9. Simple structure and can ensure good optical performance.
Further, as another preferred embodiment of the present invention, but not limited thereto, the fifth lens and the sixth lens are cemented with each other to form a combined lens having a focal length f56 satisfying: f56< -15. The structure is simple and compact, the volume is small, and good optical performance can be ensured.
Still further, as another preferred embodiment of the present invention, but not limited thereto, the refractive index Nd1 of the material, the abbe constant Vd1 of the material, and the hardness Hk of the first lens satisfy: 1.69< Nd1<2.1, 25< Vd1<57, Hk > 650. Simple structure and can ensure good optical performance.
Still further, as another preferred embodiment of the present invention, but not limited thereto, the refractive index Nd2 of the material and the abbe constant Vd2 of the material of the second lens satisfy: nd2 is more than or equal to 1.75 and less than or equal to 2.1, and Vd2 is more than or equal to 25 and less than or equal to 50. Simple structure and can ensure good optical performance.
Still further, as another preferred embodiment of the present invention, but not limited thereto, the refractive index Nd5 of the material and the abbe constant Vd5 of the material of the fifth lens satisfy: nd5 is more than or equal to 1.55 and less than or equal to 1.65, and Vd5 is more than or equal to 55 and less than or equal to 75. Simple structure and can ensure good optical performance.
Still further, as another preferred embodiment of the present invention, but not limited thereto, the refractive index Nd6 of the material and the abbe constant Vd6 of the material of the sixth lens satisfy: nd6 is more than or equal to 1.65 and less than or equal to 2.1, and Vd6 is more than or equal to 17 and less than or equal to 35. Simple structure, and can ensure good optical performance.
Still further, as another preferred embodiment of the present invention, but not limited thereto, the horizontal direction field angle HFOV of the optical system satisfies: the HFOV is more than 45 degrees and less than 80 degrees. Simple structure and can ensure good optical performance.
Further, as another preferred embodiment of the present invention, but not limited thereto, a ratio of total optical length TTL to focal length f of the optical system satisfies: TTL/f > 2.91. Simple structure and can ensure good optical performance.
Still further, as another preferred embodiment of the present invention, but not limited thereto, the stop of the optical system is located between the fourth lens and the fifth lens, or between the third lens and the fourth lens, and in this embodiment, the stop of the optical system is preferably located between the fourth lens and the fifth lens. For adjusting the intensity of the light beam.
Still further, as another preferred embodiment of the present invention, but not limited thereto, the first lens to the seventh lens are all glass lenses. The full-glass imaging system is formed by using full glass, the cost is reduced compared with a glass aspheric surface structure, the long-term reliability and the service life of the vehicle-mounted lens are ensured, and the technical requirements of national regulations on the imaging system are met.
Specifically, in a preferred embodiment of the present optical system, the lens focal length F is 5.7mm, the stop index F/NO is 1.6, the horizontal field angle HFOV is 60 °, the total optical length TTL is 22mm, and the basic lens parameters can be as shown in the following table:
Figure BDA0003571233130000051
Figure BDA0003571233130000061
specifically, as shown in fig. 5, in yet another preferred embodiment of the present optical system, the object plane side of the first lens is a convex surface, the image plane side is a concave surface, and the optical power thereof is negative; the object surface side of the second lens is a convex surface, the image surface side of the second lens is a concave surface, and the focal power of the second lens is positive; the object plane side of the third lens is a concave surface, the image plane side of the third lens is a concave surface, and the focal power of the third lens is negative; the object surface side of the fourth lens is a convex surface, the image surface side of the fourth lens is a convex surface, and the focal power of the fourth lens is positive; the object surface side of the fifth lens is a convex surface, the image surface side of the fifth lens is a convex surface, and the focal power of the fifth lens is positive; the object plane side of the sixth lens is a concave surface, the image plane side of the sixth lens is a convex surface, and the focal power of the sixth lens is negative; the seventh lens element has a convex object surface side and a convex image surface side, and has positive power. The focal length F of the lens of the optical system is 6.87mm, the stop index F/NO is 1.7, the horizontal field angle HFOV is 50 °, the total optical length TTL is 22.9mm, and the basic parameters of each lens can be shown in the following table:
Figure BDA0003571233130000062
Figure BDA0003571233130000071
specifically, as shown in fig. 6, in yet another preferred embodiment of the optical system, the object plane side of the first lens element is a convex surface, the image plane side is a concave surface, and the power thereof is negative; the object surface side of the second lens is a convex surface, the image surface side is a convex surface, and the focal power of the second lens is positive; the object plane side of the third lens is a concave surface, the image plane side of the third lens is a concave surface, and the focal power of the third lens is negative; the object surface side of the fourth lens is a convex surface, the image surface side of the fourth lens is a convex surface, and the focal power of the fourth lens is positive; the object surface side of the fifth lens is a convex surface, the image surface side of the fifth lens is a convex surface, and the focal power of the fifth lens is positive; the object plane side of the sixth lens is a concave surface, the image plane side of the sixth lens is a concave surface, and the focal power of the sixth lens is negative; the object surface side of the seventh lens is a convex surface, the image surface side of the seventh lens is a convex surface, and the focal power of the seventh lens is positive; the lens focal length F of the optical system is 4.68mm, the stop index F/NO is 1.6, the horizontal field angle HFOV is 75 °, the total optical length TTL is 21.5mm, and the basic parameters of each lens can be shown in the following table:
surface of Radius of curvature R (mm) Spacing D (mm) Refractive index Nd Dispersion value Vd
S1 100.00 1.00 1.70 55.53
S2 3.93 1.67
S3 8.01 3.01 1.91 35.25
S4 -17.04 0.18
S5 -10.26 1.80 1.61 37.01
S6 6.11 0.42
S7 8.51 3.21 1.61 60.38
S8 -6.19 -0.37
STO INFINITY 0.48
S10 10.00 1.96 1.62 63.41
S11 -4.78 0.89 1.70 30.05
S12 7.38 0.20
S13 8.50 2.01 1.95 32.32
S14 -30.83 2.20
IMA INFINITY 0.00
Of the above three tables, S1, S2 correspond to two surfaces of the first lens 1 from the object plane to the image plane 9 along the optical axis; s3, S4 correspond to both surfaces of the second lens 2; s5, S6 correspond to both surfaces of the third lens 3; s7, S8 correspond to both surfaces of the fourth lens 4; STO is diaphragm 8; s10, S11 correspond to both surfaces of the fifth lens 5; s11, S12 correspond to both surfaces of the sixth lens 6; s13, S14 correspond to both surfaces of the seventh lens 7; IMA is the image plane 6.
As can be seen from FIGS. 2 to 4, the optical system of the present embodiment has a large target surface, a large aperture, good chromatic aberration, and excellent temperature characteristics (-40 ℃ to +105 ℃), which can satisfy the usage of chips with 3 million pixels or more.
A camera module at least comprises an optical lens, wherein the large target surface and large aperture side-viewing optical system is arranged in the optical lens.
The camera module of the embodiment of the invention mainly comprises 7 lenses, the number of the lenses is reasonable, and the structure is simple; different lenses are combined with each other and reasonably distributed with focal power, the lens aberration is optimized, the lens has good chromatic aberration performance and excellent temperature characteristic (-40 ℃ to +105 ℃), and the use of a chip with more than 3 million pixels can be met.
The foregoing is illustrative of one or more embodiments provided in connection with the detailed description and is not intended to limit the practice of the invention to the particular forms disclosed. Similar or identical methods, structures and the like as those of the present invention or several technical deductions or substitutions made on the premise of the conception of the present invention should be considered as the protection scope of the present invention.

Claims (10)

1. The utility model provides a big diaphragm of big target surface looks sideways at optical system, includes from the object plane to image plane along the optical axis in proper order: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, and a seventh lens; it is characterized in that the preparation method is characterized in that,
the object surface side of the first lens is a convex surface, the image surface side of the first lens is a concave surface, and the focal power of the first lens is negative;
the object surface side of the second lens is a convex surface, and the focal power of the second lens is positive;
the object plane side of the third lens is a concave surface, the image plane side of the third lens is a concave surface, and the focal power of the third lens is negative;
the object surface side of the fourth lens is a convex surface, the image surface side of the fourth lens is a convex surface, and the focal power of the fourth lens is positive;
the object surface side of the fifth lens is a convex surface, the image surface side of the fifth lens is a convex surface, and the focal power of the fifth lens is positive;
the object plane side of the sixth lens is a concave surface, and the focal power of the sixth lens is negative;
the seventh lens element has a convex object surface side and a convex image surface side, and has positive refractive power.
2. The large-target-surface large-aperture side-viewing optical system of claim 1, wherein the fifth lens and the sixth lens are cemented together to form a combined lens, and the power of the combined lens is negative.
3. The large-target-surface large-aperture side-view optical system of claim 1 or 2, wherein the focal length f2 of the second lens and the focal length f3 of the third lens satisfy: i f2/f 3I > 0.9.
4. The large-target-surface large-aperture side-viewing optical system of claim 2, wherein the focal length f3 of the third lens and the focal length f4 of the fourth lens satisfy: i f4/f 3I > 0.9.
5. The large-target-surface large-aperture side-viewing optical system of claim 2, wherein the fifth lens and the sixth lens are cemented together to form a combined lens having a focal length f56 satisfying: f56< -15.
6. The large-target-surface large-aperture side-viewing optical system as claimed in claim 1 or 2, wherein the refractive index Nd1 of the material of the first lens, the Abbe constant Vd1 of the material and the hardness Hk satisfy: 1.69< Nd1<2.1, 25< Vd1<57, Hk > 650.
7. The large-target-surface large-aperture side-viewing optical system as claimed in claim 1 or 2, wherein the refractive index Nd2 of the material and the Abbe constant Vd2 of the material of the second lens satisfy: nd2 is more than or equal to 1.75 and less than or equal to 2.1, and Vd2 is more than or equal to 25 and less than or equal to 50.
8. The large-target-surface large-aperture side-viewing optical system as claimed in claim 1 or 2, wherein the refractive index Nd5 of the material and the Abbe constant Vd5 of the material of the fifth lens satisfy: nd5 is more than or equal to 1.55 and less than or equal to 1.65, and Vd5 is more than or equal to 55 and less than or equal to 75; and/or
The refractive index Nd6 of the material and the Abbe constant Vd6 of the material of the sixth lens satisfy that: nd6 is more than or equal to 1.65 and less than or equal to 2.1, and Vd6 is more than or equal to 17 and less than or equal to 35.
9. The large-target-surface large-aperture side-view optical system of claim 1 or 2,
the horizontal field angle HFOV of the optical system satisfies: 45 degrees < HFOV < 80 degrees; and/or
The ratio of the total optical length TTL to the focal length f of the optical system satisfies the following conditions: TTL/f > 2.91; and/or
The diaphragm of the optical system is positioned between the fourth lens and the fifth lens or between the third lens and the fourth lens; and/or
The first lens to the seventh lens are all glass lenses.
10. A camera module, at least comprising an optical lens, wherein the optical lens is provided with a large target surface and large aperture side-view optical system as claimed in any one of claims 1 to 9.
CN202210319918.7A 2022-03-29 2022-03-29 Large-target-surface large-aperture side-view optical system and camera module applying same Pending CN114706191A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190235210A1 (en) * 2018-01-31 2019-08-01 Tamron Co., Ltd. Imaging lens and imaging device
CN112526728A (en) * 2020-12-28 2021-03-19 东莞市宇瞳光学科技股份有限公司 Fixed focus lens
CN112835182A (en) * 2021-02-23 2021-05-25 天津欧菲光电有限公司 Optical system, camera module, electronic equipment and carrier
CN113359278A (en) * 2021-06-05 2021-09-07 广东弘景光电科技股份有限公司 High-pixel large-target-surface large-aperture front-view optical system and camera module applied by same
CN113759496A (en) * 2020-05-27 2021-12-07 宁波舜宇车载光学技术有限公司 Optical lens and electronic device
CN217112859U (en) * 2022-03-29 2022-08-02 广东弘景光电科技股份有限公司 Large-target-surface large-aperture side-view optical system and camera module applying same

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190235210A1 (en) * 2018-01-31 2019-08-01 Tamron Co., Ltd. Imaging lens and imaging device
CN113759496A (en) * 2020-05-27 2021-12-07 宁波舜宇车载光学技术有限公司 Optical lens and electronic device
CN112526728A (en) * 2020-12-28 2021-03-19 东莞市宇瞳光学科技股份有限公司 Fixed focus lens
CN112835182A (en) * 2021-02-23 2021-05-25 天津欧菲光电有限公司 Optical system, camera module, electronic equipment and carrier
CN113359278A (en) * 2021-06-05 2021-09-07 广东弘景光电科技股份有限公司 High-pixel large-target-surface large-aperture front-view optical system and camera module applied by same
CN217112859U (en) * 2022-03-29 2022-08-02 广东弘景光电科技股份有限公司 Large-target-surface large-aperture side-view optical system and camera module applying same

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