CN111796404B - High-pixel wide-angle day and night confocal camera module - Google Patents
High-pixel wide-angle day and night confocal camera module Download PDFInfo
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Abstract
This application is a divisional application with application number 201910010426.8. The embodiment of the invention discloses a high-pixel wide-angle day and night confocal camera module, which at least comprises an optical lens, wherein a high-pixel wide-angle day and night confocal optical system is arranged in the optical lens, and the optical system 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, a seventh lens, and an eighth lens; the object surface side of the first lens is a convex surface, and the image surface side of the first lens is a concave surface; the object surface side of the second lens is a concave surface, and the image surface side of the second lens is a convex surface; the object plane side of the third lens is a convex surface; the fourth lens is a biconcave lens; the image surface side of the fifth lens is a convex surface; the sixth lens is a biconvex lens; the object plane side of the seventh lens is a concave surface, and the image plane side of the seventh lens is a convex surface; the eighth lens is a biconvex lens. The optical system or camera module of the embodiment of the invention is mainly composed of 8 lenses, and has reasonable number of lenses, simple structure and good optical performance.
Description
The application is a divisional application, the application number of the original application is 201910010426.8, the application date is 2019, and the number of the application date is 07 month 01, and the invention is named as a high-pixel wide-angle day-night confocal optical system and a camera module applied by the same.
The technical field is as follows:
the invention relates to a camera module, in particular to a high-pixel wide-angle day and night confocal camera module.
Background art:
with the development of scientific technology, the high-pixel wide-angle day and night confocal optical system or the camera module can observe a wider space range due to a large visual angle, and can ensure that the high-pixel wide-angle day and night confocal optical system or the camera module can effectively work under the conditions of day and night, so that the high-pixel wide-angle day and night confocal optical system or the camera module is widely applied to the field of automobiles and the field of assistant driving. However, the number of lenses is large, and the structure is complicated.
The invention content is as follows:
in order to solve the problems of large number of lenses and complex structure of the existing optical system or camera module, the embodiment of the invention provides a high-pixel wide-angle day and night confocal camera module.
The utility model provides a confocal module of making a video recording of high pixel wide angle day night, includes optical lens at least, installs the confocal optical system of high pixel wide angle day night in the optical lens, and this confocal optical system of high pixel wide angle day night includes from the object plane to image plane in proper order along the optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth 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 concave surface, the image 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 convex surface, and the focal power of the third lens is positive;
the object plane side of the fourth lens is a concave surface, the image plane side of the fourth lens is a concave surface, and the focal power of the fourth lens is negative;
the image surface side of the fifth lens is a convex surface, and the focal power of the fifth lens is positive;
the object surface side of the sixth lens is a convex surface, the image surface side of the sixth lens is a convex surface, and the focal power of the sixth lens is positive;
the object plane side of the seventh lens is a concave surface, the image plane side of the seventh lens is a convex surface, and the focal power of the seventh lens is negative;
the object plane side of the eighth lens is a convex surface, the image plane side is a convex surface, and the focal power of the eighth lens is positive.
The camera module of the embodiment of the invention mainly comprises 8 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 confocal optical lens has good performances of day and night confocal performance, large visual angle, high pixel, good heat difference elimination and the like.
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 first schematic structural diagram of an optical system or a camera module according to an embodiment of the present invention;
FIG. 2 is a distortion curve at +25 ℃ for an embodiment of an optical system or camera module of the present invention;
FIG. 3 is a graph of MTF at +25 ℃ for an embodiment of an optical system or camera module of the present invention;
FIG. 4 is a diagram of relative illumination at +25 ℃ for an embodiment of an optical system or camera module of the present invention;
FIG. 5 is a graph of MTF at-40 ℃ for an optical system or camera module embodiment of the present invention;
FIG. 6 is a graph of MTF at +85 ℃ for an embodiment of an optical system or camera module of the present invention;
FIG. 7 is a second schematic structural diagram of an optical system or a camera module according to an embodiment of the present invention;
FIG. 8 is a third schematic structural diagram of an optical system or a camera module according to an embodiment of the present invention;
FIG. 9 is a fourth schematic structural diagram of an optical system or a camera module according to an embodiment of the present invention;
fig. 10 is a fifth schematic structural diagram of an optical system or a camera module according to an 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.
As shown in fig. 1, the present embodiment provides a high-pixel wide-angle day and night confocal imaging module, which at least includes an optical lens, and a high-pixel wide-angle day and night confocal optical system is installed in the optical lens, and the high-pixel wide-angle day and night confocal optical system sequentially includes, from an object plane to an image plane 10 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, a seventh lens 7, and an eighth lens 8.
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 concave surface, the image surface side is a convex surface, and the focal power is positive;
the object surface side of the third lens 3 is a convex surface, the image surface side is a plane, and the focal power is positive;
the object surface side of the fourth lens 4 is a concave surface, the image surface side is a concave surface, and the focal power of the fourth lens is negative;
the object plane side of the fifth lens 5 is a plane, the image plane side is a convex surface, and the focal power of the fifth lens is positive;
the object surface side of the sixth lens element 6 is a convex surface, the image surface side is a convex surface, and the focal power thereof is positive;
the object surface side of the seventh lens 7 is a concave surface, the image surface side is a convex surface, and the focal power of the seventh lens is negative;
the object surface side of the eighth lens element 8 is a convex surface, the image surface side is a convex surface, and the focal power thereof is positive;
the camera module of the embodiment of the invention mainly comprises 8 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 confocal optical lens has good performances of day and night confocal performance, large visual angle, high pixel, good heat difference elimination and the like.
The optical system satisfies TTL/EFL not more than 5.40, wherein TTL is the distance between the object plane side vertex of the first lens 1 and the imaging plane 10 of the optical system, and EFL is the effective focal length of the optical system. Different lenses are combined with each other and the focal power is reasonably distributed, so that the confocal optical lens has good performances of day and night confocal performance, large visual angle, high pixel, good heat difference elimination and the like.
Further, as another preferred embodiment of the present invention, without limitation, as shown in fig. 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 concave surface, the image surface side is a convex surface, and the focal power is positive;
the object surface side of the third lens 3 is a convex surface, the image surface side is a concave surface, and the focal power is positive;
the object surface side of the fourth lens 4 is a concave surface, the image surface side is a concave surface, and the focal power of the fourth lens is negative;
the object plane side of the fifth lens 5 is a plane, the image plane side is a convex surface, and the focal power of the fifth lens is positive;
the object surface side of the sixth lens element 6 is a convex surface, the image surface side is a convex surface, and the focal power thereof is positive;
the object surface side of the seventh lens 7 is a concave surface, the image surface side is a convex surface, and the focal power of the seventh lens is negative;
the eighth lens element 8 has a convex object surface side and a convex image surface side, and has positive refractive power.
Still further, as another preferred embodiment of the present invention, without limitation, as shown in figure 8,
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 concave surface, the image surface side is a convex surface, and the focal power is positive;
the object surface side of the third lens 3 is a convex surface, the image surface side is a convex surface, and the focal power is positive;
the object surface side of the fourth lens 4 is a concave surface, the image surface side is a concave surface, and the focal power of the fourth lens is negative;
the object plane side of the fifth lens 5 is a plane, the image plane side is a convex surface, and the focal power of the fifth lens is positive;
the object surface side of the sixth lens element 6 is a convex surface, the image surface side is a convex surface, and the focal power thereof is positive;
the object surface side of the seventh lens 7 is a concave surface, the image surface side is a convex surface, and the focal power of the seventh lens is negative;
the eighth lens element 8 has a convex object surface side and a convex image surface side, and has positive refractive power.
Still further, as another preferred embodiment of the present invention, without limitation, as shown in figure 9,
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 concave surface, the image surface side is a convex surface, and the focal power is positive;
the object surface side of the third lens 3 is a convex surface, the image surface side is a plane, and the focal power is positive;
the object surface side of the fourth lens 4 is a concave surface, the image surface side is a concave surface, and the focal power of the fourth lens is negative;
the object plane side of the fifth lens 5 is a convex surface, the image plane side is a convex surface, and the focal power of the fifth lens is positive;
the object surface side of the sixth lens element 6 is a convex surface, the image surface side is a convex surface, and the focal power thereof is positive;
the object surface side of the seventh lens 7 is a concave surface, the image surface side is a convex surface, and the focal power of the seventh lens is negative;
the eighth lens element 8 has a convex object surface side and a convex image surface side, and has positive refractive power.
Further, as another preferred embodiment of the present invention, without limitation, as shown in figure 10,
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 concave surface, the image surface side is a convex surface, and the focal power is positive;
the object surface side of the third lens 3 is a convex surface, the image surface side is a plane, and the focal power is positive;
the object surface side of the fourth lens 4 is a concave surface, the image surface side is a concave surface, and the focal power of the fourth lens is negative;
the object plane side of the fifth lens 5 is a concave surface, the image plane side is a convex surface, and the focal power of the fifth lens is positive;
the object surface side of the sixth lens element 6 is a convex surface, the image surface side is a convex surface, and the focal power thereof is positive;
the object surface side of the seventh lens 7 is a concave surface, the image surface side is a convex surface, and the focal power of the seventh lens is negative;
the eighth lens element 8 has a convex object surface side and a convex image surface side, and has positive refractive power.
Further, as a preferred embodiment of the present invention, but not limited thereto, each lens of the present optical system satisfies the following condition:
(1)-12<f1<-3；
(2)50<f2<150；
(3)5<f3<10；
(4)-10<f4<-3；
(5)5<f5<10；
(6)2<f6<10；
(7)-10<f7<-5；
(8)5<f8<20；
where f1 is a focal length of the first lens 1, f2 is a focal length of the second lens 2, f3 is a focal length of the third lens 3, f4 is a focal length of the fourth lens 4, f5 is a focal length of the fifth lens 5, f6 is a focal length of the sixth lens 6, f7 is a focal length of the seventh lens 7, and f8 is a focal length of the eighth lens 8. Through the mutual combination of different lenses and the reasonable distribution of focal power, the optical system has good performances such as large aperture, large visual angle, high pixel and very good athermal difference.
Still further, as a preferred embodiment of the present invention, but not limited thereto, each lens of the optical system satisfies the following condition:
(1)-5<f1/f<-1；
(2)5<f2/f<50；
(3)1<f3/f<10；
(4)-10<f4/f<-1；
(5)1.5<f5/f<10；
(6)1.0<f6/f<7；
(7)-7<f7/f<-1.2；
(8)2<f8/f<10；
where f is a focal length of the entire optical system, f1 is a focal length of the first lens 1, f2 is a focal length of the second lens 2, f3 is a focal length of the third lens 3, f4 is a focal length of the fourth lens 4, f5 is a focal length of the fifth lens 5, f6 is a focal length of the sixth lens 6, f7 is a focal length of the seventh lens 7, and f8 is a focal length of the eighth lens 8. Through the mutual combination of different lenses and the reasonable distribution of focal power, the optical system has good performances such as large aperture, large visual angle, high pixel and very good athermal difference.
Still further, as a preferred embodiment of the present invention, but not limited thereto, the refractive index Nd1 of the material and the abbe constant Vd1 of the first lens 1 satisfy: 1.67< Nd1<1.95, 40< Vd1< 60. Simple structure and can ensure good optical performance.
Still further, as a preferred embodiment of the present invention, but not limited thereto, the refractive index Nd2 of the material and the abbe constant Vd2 of the second lens 2 satisfy: 1.70< Nd2<1.95, 17< Vd2< 45. Simple structure and can ensure good optical performance.
Further, as a preferred embodiment of the present invention, but not limited thereto, the refractive index Nd3 of the material and the abbe constant Vd3 of the material of the third lens 3 satisfy: 1.75< Nd3<1.95, 17< Vd3< 35. Simple structure and can ensure good optical performance.
Still further, as a preferred embodiment of the present invention, but not limited thereto, the refractive index Nd4 of the material and the abbe constant Vd4 of the material of the fourth lens 4 satisfy: 1.45< Nd4<1.75, 15< Vd4< 50. Simple structure and can ensure good optical performance.
Still further, as a preferred embodiment of the present invention, but not limited thereto, the fifth lens 5 has a refractive index Nd5 of a material and an abbe constant Vd5 of a material satisfying: 1.45< Nd5<1.75, 45< Vd5< 70. Simple structure and can ensure good optical performance.
Further, as a 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 6 satisfy: 1.45< Nd6<1.65, 60< Vd6< 90. Simple structure and can ensure good optical performance.
Still further, as a preferred embodiment of the present invention, but not limited thereto, the seventh lens 7 has a refractive index Nd7 of material and an abbe constant Vd7 of material satisfying: 1.75< Nd7<2.05, 15< Vd7< 40. Simple structure and can ensure good optical performance.
Still further, as a preferred embodiment of the present invention, but not limited thereto, the refractive index Nd8 of the material and the abbe constant Vd8 of the eighth lens 8 satisfy: 1.45< Nd8<1.65, 50< Vd8< 90. Simple structure and can ensure good optical performance.
Further, as a preferred embodiment of the present invention, not limited thereto, the sixth lens 6 and the seventh lens 7 are cemented with each other to form a combined lens.
Still further, as a preferred embodiment of the present invention, but not limited thereto, the combination lens satisfies the following condition: 10< f67<50, where f67 is the focal length of the combined lens. Simple structure and can ensure good optical performance.
Still further, as a preferred embodiment of the present invention, but not limited thereto, the first lens 1 to the eighth lens 8 are all glass spherical lenses. Simple structure and can ensure good optical performance.
Further, as a preferred embodiment of the present invention, but not limiting, the diaphragm 9 of the optical system is located between the second lens 2 and the third lens 3. For adjusting the intensity of the light beam.
Still further, as a preferred embodiment of the present invention, but not limited thereto, a dual-pass filter is disposed between the eighth lens 8 and the image plane 10, and allows visible light and specified infrared light waves to pass through.
Specifically, in the present embodiment, the focal length f1 of the first lens 1 is equal to-5.22 mm, the focal length f2 of the second lens 2 is equal to 145.54mm, the focal length f3 of the third lens 3 is equal to 8.18mm, the focal length f4 of the fourth lens 4 is equal to-5.37 mm, the focal length f5 of the fifth lens 5 is equal to 7.19mm, the focal length f6 of the sixth lens 6 is equal to 5.65mm, the focal length f7 of the seventh lens 7 is equal to-7.38 mm, and the focal length f8 of the eighth lens 8 is equal to 13.96 mm. The basic parameters of the optical system are shown in the following table:
in the above table, S1, S2 correspond to two surfaces of the first lens 1 from the object plane to the image plane 10 along the optical axis; s3, S4 correspond to both surfaces of the second lens 2; s5 is stop STO; s6, S7 correspond to both surfaces of the third lens 3; s8, S9 correspond to both surfaces of the fourth lens 4; s10, S11 correspond to both surfaces of the fifth lens 5; s12, S13 correspond to both surfaces of the sixth lens 6; s13, S14 correspond to both surfaces of the seventh lens 7; s15, S16 correspond to both surfaces of the eighth lens 8; s17 and S18 correspond to two surfaces of the double-wave-pass filter; IMA is the image plane 10.
As can be seen from fig. 2 to 6, the optical system of the present embodiment has good performances of day and night confocal, large viewing angle, high pixel, and very good athermal property.
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 (8)
1. The utility model provides a confocal module of making a video recording of high pixel wide angle day night, includes optical lens at least, installs the confocal optical system of high pixel wide angle day night in the optical lens, and this confocal optical system of high pixel wide angle day night includes from the object plane to image plane in proper order along the optical axis: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth 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 concave surface, the image 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 convex surface, and the focal power of the third lens is positive;
the object plane side of the fourth lens is a concave surface, the image plane side of the fourth lens is a concave surface, and the focal power of the fourth lens is negative;
the image surface side of the fifth lens is a convex surface, and the focal power of the fifth lens is positive;
the object surface side of the sixth lens is a convex surface, the image surface side of the sixth lens is a convex surface, and the focal power of the sixth lens is positive;
the object plane side of the seventh lens is a concave surface, the image plane side of the seventh lens is a convex surface, and the focal power of the seventh lens is negative;
the object surface side of the eighth lens is a convex surface, the image surface side of the eighth lens is a convex surface, and the focal power of the eighth lens is positive;
each lens of the optical system satisfies the following conditions:
(1)-12<f1<-3；
(2)50<f2<150；
(3)5<f3<10；
(4)-10<f4<-3；
(5)5<f5<10；
(6)2<f6<10；
(7)5<f8<20；
wherein f1 is the focal length of the first lens element, f2 is the focal length of the second lens element, f3 is the focal length of the third lens element, f4 is the focal length of the fourth lens element, f5 is the focal length of the fifth lens element, f6 is the focal length of the sixth lens element, and f8 is the focal length of the eighth lens element.
2. The high-pixel wide-angle day and night confocal camera module of claim 1, wherein each lens of the optical system satisfies the following condition:
(1)-5<f1/f<-1；
(2)5<f2/f<50；
(3)1<f3/f<10；
(4)-10<f4/f<-1；
(5)1.5<f5/f<10；
(6)1.0<f6/f<7；
(7)-7<f7/f<-1.2；
(8)2<f8/f<10；
where f is a focal length of the entire optical system, f1 is a focal length of the first lens, f2 is a focal length of the second lens, f3 is a focal length of the third lens, f4 is a focal length of the fourth lens, f5 is a focal length of the fifth lens, f6 is a focal length of the sixth lens, f7 is a focal length of the seventh lens, and f8 is a focal length of the eighth lens.
3. The high-pixel wide-angle day and night confocal imaging module according to claim 1 or 2, wherein the refractive index Nd1 of the material and the abbe constant Vd1 of the material of the first lens satisfy: 1.67< Nd1<1.95, 40< Vd1< 60.
4. The high-pixel wide-angle day and night confocal imaging module according to 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: 1.70< Nd2<1.95, 17< Vd2< 45.
5. The high-pixel wide-angle day and night confocal imaging module according to claim 1 or 2, wherein the refractive index Nd3 of the material and the Abbe constant Vd3 of the material of the third lens satisfy: 1.75< Nd3<1.95, 17< Vd3< 35.
6. The high-pixel wide-angle day and night confocal imaging module according to claim 1 or 2, wherein the refractive index Nd4 of the material and the Abbe constant Vd4 of the material of the fourth lens satisfy: 1.45< Nd4<1.75, 15< Vd4< 50.
7. The high-pixel wide-angle day and night confocal imaging module according to claim 1 or 2, wherein a refractive index Nd5 of a material and an abbe constant Vd5 of the material of the fifth lens satisfy: 1.45< Nd5<1.75, 45< Vd5< 70.
8. The high-pixel wide-angle day and night confocal imaging module according to claim 1 or 2, wherein the refractive index Nd6 of the material and the Abbe constant Vd6 of the material of the sixth lens satisfy: 1.45< Nd6<1.65, 60< Vd6< 90.
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| CN110161655A (en) * | 2019-05-28 | 2019-08-23 | 广东弘景光电科技股份有限公司 | Wide-angle day and night camera module of the confocal type without thermalization optical system and its application |
| CN110531589B (en) * | 2019-08-16 | 2024-03-26 | 中山依瓦塔光学有限公司 | Projection objective lens of photoetching machine |
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| CN114442285A (en) * | 2021-12-23 | 2022-05-06 | 广东弘景光电科技股份有限公司 | Camera module based on free-form surface design |
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| CN109581634A (en) | 2019-04-05 |
| CN109581634B (en) | 2023-11-21 |
| CN111796405B (en) | 2022-04-15 |
| WO2020143420A1 (en) | 2020-07-16 |
| CN111796404A (en) | 2020-10-20 |
| CN111796405A (en) | 2020-10-20 |
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