CN111880292A - Small-size fisheye camera module with ultra-wide angle, ultra-high pixel and low chromatic aberration - Google Patents
Small-size fisheye camera module with ultra-wide angle, ultra-high pixel and low chromatic aberration Download PDFInfo
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- CN111880292A CN111880292A CN202010569567.6A CN202010569567A CN111880292A CN 111880292 A CN111880292 A CN 111880292A CN 202010569567 A CN202010569567 A CN 202010569567A CN 111880292 A CN111880292 A CN 111880292A
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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
- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
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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
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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
- 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
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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
- G02B13/0055—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
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Abstract
The embodiment of the invention discloses a small-volume fisheye camera module with ultra-wide angle and ultra-high pixel and low chromatic aberration, which at least comprises: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, and a tenth lens; the object plane sides of the first lens, the second lens and the eighth lens are convex surfaces, the image plane sides are concave surfaces, and the focal power is negative; the object plane side of the third lens is a concave surface, the image plane side of the third lens is a convex surface, and the focal power of the third lens is negative; the fifth lens is a biconcave lens, and the focal power of the fifth lens is negative; the fourth lens, the sixth lens and the tenth lens are double-convex lenses, and the focal power is positive; the object plane sides of the seventh lens and the ninth lens are convex surfaces, the image plane sides of the seventh lens and the ninth lens are concave surfaces, and the focal power is positive; the embodiment of the invention mainly comprises 10 lenses, and the lenses have reasonable number, smart structure and small volume; different lenses are combined with each other and the focal power is reasonably distributed, so that the lens has good performances of 200-degree ultra-wide angle, 4800-thousand ultra-high pixels, low chromatic aberration and the like.
Description
The technical field is as follows:
the invention relates to a camera module, in particular to a small-size fisheye camera module with ultra-wide angle, ultra-high pixel and low chromatic aberration, which is suitable for the fields of a panoramic VR (virtual reality) motion camera, 360-degree dead-angle-free monitoring and the like.
Background art:
with the wider application of high resolution technology, especially the wide application of ultra-wide angle lens, a series of high pixel lens products appear in the market. But the optical system has the defects of complex structure and larger volume.
The invention content is as follows:
in order to solve the problems of complex structure and large volume of an optical system of the conventional camera module, the embodiment of the invention provides a small-volume fisheye camera module with an ultra-wide angle, ultra-high pixels and low chromatic aberration.
The utility model provides a little volume flake optical system of low colour difference of super wide angle super high pixel, this optical system includes from the object plane to the image plane in proper order along the optical axis that super wide angle super high pixel low colour difference's little volume flake module of making a video recording at least includes optical lens, installs the little volume flake optical system of super wide angle super high pixel in the optical lens, this optical system: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, and a tenth 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, the image surface side of the second lens is a concave surface, and the focal power of the second lens is negative;
the object plane side of the third lens is a concave surface, the image plane side of the third lens is a convex 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 image surface side of the fifth lens is a concave surface, and the focal power of the fifth lens is negative;
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 surface side of the seventh lens is a convex surface, the image surface side of the seventh lens is a concave surface, and the focal power of the seventh lens is positive;
the object plane side of the eighth lens is a convex surface, the image plane side of the eighth lens is a concave surface, and the focal power of the eighth lens is negative;
the object plane side of the ninth lens is a convex surface, the image plane side of the ninth lens is a concave surface, and the focal power of the ninth lens is positive;
the tenth lens element has a convex object surface side and a convex image surface side, and has positive refractive power.
The camera module of the embodiment of the invention mainly comprises 10 lenses, and has reasonable number of lenses, ingenious structure and small volume; different lenses are combined with each other and the focal power is reasonably distributed, so that the lens has good performances of 200-degree ultra-wide angle, 4800-thousand ultra-high pixels, low chromatic aberration and the like. The method is suitable for the fields of panoramic VR moving cameras, 360-degree dead angle-free monitoring 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 schematic structural diagram of a camera module according to an embodiment of the present invention;
FIG. 2 is a graph showing curvature of field and distortion of an embodiment of the camera module of the present invention;
FIG. 3 is a color difference diagram of an embodiment of a camera module according to the present invention;
FIG. 4 is a graph of MTF transfer function of an embodiment of the camera module of the present invention;
fig. 5 is a relative illuminance diagram of an embodiment of the camera module 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 discloses a small-size fisheye imaging module with ultra-wide angle and ultra-high pixel and low chromatic aberration, which at least includes an optical lens, a small-size fisheye optical system with ultra-wide angle and ultra-high pixel and low chromatic aberration is installed in the optical lens, and the optical system sequentially includes, from an object plane to an image plane 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, an eighth lens 8, a ninth lens 9, and a tenth lens 10.
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, the image surface side of the second lens is a concave surface, and the focal power of the second lens is negative;
the object plane side of the third lens is a concave surface, the image plane side of the third lens is a convex 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 image surface side of the fifth lens is a concave surface, and the focal power of the fifth lens is negative;
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 surface side of the seventh lens is a convex surface, the image surface side of the seventh lens is a concave surface, and the focal power of the seventh lens is positive;
the object plane side of the eighth lens is a convex surface, the image plane side of the eighth lens is a concave surface, and the focal power of the eighth lens is negative;
the object plane side of the ninth lens is a convex surface, the image plane side of the ninth lens is a concave surface, and the focal power of the ninth lens is positive;
the tenth lens element has a convex object surface side and a convex image surface side, and has positive refractive power.
The camera module of the embodiment of the invention mainly comprises 10 lenses, and has reasonable number of lenses, ingenious structure and small volume; different lenses are combined with each other and the focal power is reasonably distributed, so that the lens has good performances of 200-degree ultra-wide angle, 4800-thousand ultra-high pixels, low chromatic aberration and the like. The method is suitable for the fields of panoramic VR moving cameras, 360-degree dead angle-free monitoring and the like.
Further, as a preferred embodiment of the present invention, but not limited thereto, each lens of the optical system satisfies the following condition:
(1)-0.30<f/f1<-0.08；
(2)-0.32<f/f2<-0.10；
(3)-0.39<f/f3<-0.17；
(4)0.07<f/f45<0.35；
(5)0.21<f/f6<0.46；
(6)0<f/f7<0.16；
(7)-0.19<f/f89<-0.02；
(8)0.11<f/f10<0.43；
wherein 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, F45 is a combined focal length of the fourth lens and the fifth lens cemented with each other, F6 is a focal length of the sixth lens, F7 is a focal length of the seventh lens, F89 is a combined focal length of the eighth lens and the ninth lens cemented with each other, and F10 is a focal length of the tenth lens. Different lenses are combined with each other and the focal power is reasonably distributed, so that the lens has good performances of 200-degree ultra-wide angle, 4800-thousand ultra-high pixels, low chromatic aberration and the like.
Still further, as a preferred embodiment of the present invention, but not limited thereto, the fourth lens and the fifth lens are cemented with each other to form a combined lens, the focal power of the combined lens is positive, and the combined focal length f45 thereof satisfies the following relationship with the focal length f of the entire optical system: 0.07< f/f45< 0.35. The structure is simple and compact, the volume is small, and good optical performance can be ensured.
Further, as a preferred embodiment of the present invention, but not limited thereto, the eighth lens and the ninth lens are cemented with each other to form a combined lens, the power of the combined lens is negative, and the combined focal length f89 and the focal length f of the entire optical system satisfy: -0.19< f/f89< -0.02. The structure is simple and compact, the volume is small, and good optical performance can be ensured.
Still further, as a preferred embodiment of the present invention, but not limited thereto, an aperture stop is located between the seventh lens and the eighth lens, near the seventh lens side. For adjusting the intensity of the light beam.
Still further, as a preferred embodiment of the present invention, but not limited thereto, the refractive index Nd1 of the material of the first lens, the abbe constant Vd1 of the material, the focal length f1 of the first lens, and the system focal length f satisfy: nd1 is more than 1.70, Vd1 is less than 55, 0.30 is less than f/f1< -0.08. Simple structure and can ensure good optical performance.
Further, as a preferred embodiment of the present invention, but not limited thereto, the refractive index Nd2 of the material of the second lens, the abbe constant Vd2 of the material, the focal length f2 of the second lens, and the system focal length f satisfy the following relationship: nd 2< 1.6, Vd2 > 70, -0.32< f/f2< -0.10. 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 Nd3 of the material of the third lens, the abbe constant Vd3 of the material, the focal length f3 of the third lens, and the system focal length f satisfy: nd3 is more than 1.7, Vd3 is less than 55, and-0.39 is less than f/f3< -0.17. 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 satisfy: nd4 is less than 1.85, and Vd4 is more than 23; and/or the refractive index Nd5 of the material and the Abbe constant Vd5 of the material of the fifth lens satisfy the following conditions: nd5 is greater than 1.94, Vd5 is less than 20. 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, the abbe constant Vd6 of the material, the focal length f6 of the sixth lens and the system focal length f satisfy the following relationship: nd6 is more than 1.8, Vd6 is less than 44, 0.21 is less than f/f6 is less than 0.46. 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 Nd7 of the material, the abbe constant Vd7 of the material, the focal length f7 of the seventh lens and the system focal length f satisfy: nd 7< 1.5, Vd7 > 80, 0< f/f7< 0.16. 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 material of the eighth lens satisfy: nd8 is greater than 1.94, Vd8 is less than 20. Simple structure and can ensure good optical performance.
Further, as a preferred embodiment of the present invention, but not limited thereto, the refractive index Nd9 of the material, the abbe constant Vd9 of the material, the focal length f9 of the ninth lens and the system focal length f satisfy the following requirements: nd 9< 1.5, Vd9 > 90. 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 Nd10 of the material of the tenth lens, the abbe constant Vd10 of the material, the focal length f10 of the tenth lens, and the system focal length f satisfy: nd10 < 1.56, Vd10 > 70, 0.11< f/f10< 0.43. Simple structure and can ensure good optical performance.
Further, as a preferred embodiment of the present invention, the second lens 2, the sixth lens 6, the seventh lens 7, and the tenth lens 10 are glass aspherical lenses, not limited thereto. Simple structure and can ensure good optical performance.
Specifically, as a preferred embodiment of the present invention, but not limited thereto, in this embodiment, the focal length F of the optical system is 1.38mm, the stop index F/NO is 1.9, the field angle FOV is 200 °, the total optical length TTL is 19mm, and the basic parameters of the optical system are as 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 12 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; s8, S9 correspond to both surfaces of the fifth lens 5; s10, S11 correspond to both surfaces of the sixth lens 6; s12, S13 correspond to both surfaces of the seventh lens 7; STO is diaphragm 11; s15, S16 correspond to both surfaces of the eighth lens 8; s16, S17 correspond to both surfaces of the ninth lens 9; s18, S19 correspond to both surfaces of the tenth lens 10.
Still further, as a preferred embodiment of the present invention, but not limited thereto, the surfaces of the second lens 2, the sixth lens 6, the seventh lens 7, and the tenth lens 10 are aspheric in shape, and satisfy the following equations:
wherein, the parameter c is 1/R, namely the curvature corresponding to the radius, y is a radial coordinate, the unit of which is the same as the unit of the length of the lens, k is a conic coefficient, a1To a8The coefficients are respectively corresponding to the radial coordinates. The aspheric correlation values of the second lens element 2, the sixth lens element 6, the seventh lens element 7, and the tenth lens element 10 are shown in the following table:
as can be seen from fig. 2 to 5, the optical system of the present embodiment has good performance such as 200 ° super wide angle, 4800 ten thousand super high pixels, low chromatic aberration, etc.
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 little volume flake optical system of low colour difference of super wide angle super high pixel, this optical system includes from the object plane to the image plane in proper order along the optical axis that super wide angle super high pixel low colour difference's little volume flake module of making a video recording at least includes optical lens, installs the little volume flake optical system of super wide angle super high pixel in the optical lens, this optical system: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, and a tenth 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, the image surface side of the second lens is a concave surface, and the focal power of the second lens is negative;
the object plane side of the third lens is a concave surface, the image plane side of the third lens is a convex 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 image surface side of the fifth lens is a concave surface, and the focal power of the fifth lens is negative;
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 surface side of the seventh lens is a convex surface, the image surface side of the seventh lens is a concave surface, and the focal power of the seventh lens is positive;
the object plane side of the eighth lens is a convex surface, the image plane side of the eighth lens is a concave surface, and the focal power of the eighth lens is negative;
the object plane side of the ninth lens is a convex surface, the image plane side of the ninth lens is a concave surface, and the focal power of the ninth lens is positive;
the tenth lens element has a convex object surface side and a convex image surface side, and has positive refractive power.
2. The ultra-wide angle ultra-high pixel low-chromatic aberration small-volume fisheye imaging module of claim 1, wherein each lens of the optical system satisfies the following conditions:
(1)-0.30<f/f1<-0.08；
(2)-0.32<f/f2<-0.10；
(3)-0.39<f/f3<-0.17；
(4)0.07<f/f45<0.35；
(5)0.21<f/f6<0.46；
(6)0<f/f7<0.16；
(7)-0.19<f/f89<-0.02；
(8)0.11<f/f10<0.43；
wherein 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, F45 is a combined focal length of the fourth lens and the fifth lens cemented with each other, F6 is a focal length of the sixth lens, F7 is a focal length of the seventh lens, F89 is a combined focal length of the eighth lens and the ninth lens cemented with each other, and F10 is a focal length of the tenth lens.
3. The ultra-wide angle and ultra-high pixel low-chromatic aberration small-volume fish-eye imaging module set forth in claim 1, wherein the fourth lens and the fifth lens are mutually cemented to form a combined lens, the focal power of the combined lens is positive, and the combined focal length f45 of the combined lens and the focal length f of the whole optical system satisfy: 0.07< f/f45< 0.35.
4. The ultra-wide-angle ultra-high pixel low-chromatic aberration small-volume fisheye imaging module of claim 1, wherein the eighth lens and the ninth lens are mutually cemented to form a combined lens, the focal power of the combined lens is negative, and the combined focal length f89 and the focal length f of the whole optical system satisfy: -0.19< f/f89< -0.02.
5. The ultra-wide angle ultra-high pixel low-chromatic aberration small-volume fisheye imaging module of claim 1, wherein the aperture stop is located between the seventh lens and the eighth lens, near the seventh lens side.
6. The ultra-wide angle and ultra-high pixel low-chromatic aberration small-volume fish-eye imaging module set as claimed in any one of claims 1-5, wherein the refractive index Nd1 of the material of the first lens, the Abbe constant Vd1 of the material, the focal length f1 and the system focal length f satisfy the following conditions: nd1 is more than 1.70, Vd1 is less than 55, 0.30 is less than f/f1< -0.08.
7. The ultra-wide angle and ultra-high pixel low-chromatic aberration small-volume fish-eye imaging module set as claimed in any one of claims 1-5, wherein the refractive index Nd2 of the material of the second lens, the Abbe constant Vd2 of the material, the focal length f2 and the system focal length f satisfy the following conditions: nd 2< 1.6, Vd2 > 70, -0.32< f/f2< -0.10.
8. The ultra-wide angle and ultra-high pixel low-chromatic aberration small-volume fish-eye imaging module set as claimed in any one of claims 1-5, wherein the refractive index Nd3 of the material of the third lens, the Abbe constant Vd3 of the material, the focal length f3 and the system focal length f satisfy the following conditions: nd3 is more than 1.7, Vd3 is less than 55, and-0.39 is less than f/f3< -0.17.
9. The ultra-wide angle and ultra-high pixel low-chromatic aberration small-volume fish-eye imaging module set forth in any one of claims 1-5, wherein the refractive index Nd4 of the material and the Abbe constant Vd4 of the material of the fourth lens satisfy: nd4 is less than 1.85, and Vd4 is more than 23; and/or the refractive index Nd5 of the material and the Abbe constant Vd5 of the material of the fifth lens satisfy the following conditions: nd5 is greater than 1.94, Vd5 is less than 20.
10. The ultra-wide angle and ultra-high pixel low-chromatic aberration small-volume fish-eye imaging module set forth in any one of claims 1-5, wherein the refractive index Nd6 of the material of the sixth lens, the Abbe constant Vd6 of the material, the focal length f6 and the system focal length f satisfy the following conditions: nd6 is more than 1.8, Vd6 is less than 44, 0.21 is less than f/f6 is less than 0.46.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111781713A (en) * | 2020-06-20 | 2020-10-16 | 广东弘景光电科技股份有限公司 | Small-size fish-eye optical system with ultra-wide angle, ultra-high pixel and low chromatic aberration |
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