CN111880286B - Large aperture ultra-large wide angle monitoring camera module - Google Patents
Large aperture ultra-large wide angle monitoring camera module Download PDFInfo
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- CN111880286B CN111880286B CN202010569576.5A CN202010569576A CN111880286B CN 111880286 B CN111880286 B CN 111880286B CN 202010569576 A CN202010569576 A CN 202010569576A CN 111880286 B CN111880286 B CN 111880286B
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 11
- 230000003287 optical effect Effects 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 description 11
- 230000000007 visual effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 206010037660 Pyrexia Diseases 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000004297 night vision Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
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Abstract
The embodiment of the invention discloses a large aperture ultra-large wide angle monitoring camera module, 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, and a sixth lens; the object plane side of the first lens is a convex surface, the image plane side is a concave surface, and the focal power of the first lens is negative; the object plane side of the second lens is a concave surface, the image plane 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 convex surface, the image plane side 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 is a concave surface, and the focal power of the fourth lens is negative; the image plane side of the fifth lens is a convex surface, the image plane side is a convex surface, and the focal power of the fifth lens is positive; the object plane side of the sixth lens is a convex surface, the image plane side is a concave surface, and the focal power of the sixth lens is positive. The optical system of the embodiment of the invention mainly consists of 6 lenses, and has the advantages of reasonable lens number, simple structure, small volume, light weight and low cost.
Description
Technical field:
the invention relates to a camera module, in particular to a large-aperture ultra-large wide-angle monitoring camera module applicable to the monitoring field.
The background technology is as follows:
with the development of society, the living standard of people is continuously improved, and the visual intelligent doorbell is widely applied to high-grade residences in all large and small areas. The key core in the visual intelligent doorbell is a camera module, however, the camera module has the problems of complex structure, large volume, small visual range, poor night vision effect and poor definition. And in actual use, severe fever exists, which leads to the phenomenon of imaging with virtual focus.
The invention comprises the following steps:
in order to solve the problems of complex structure and large volume of the existing camera module, the embodiment of the invention provides a large-aperture ultra-large wide-angle monitoring camera module.
The utility model provides a super large wide angle surveillance camera module of large aperture, includes at least optical lens, installs the super large wide angle surveillance optical system of large aperture in the optical lens, and this optical system includes along the optical axis from the object plane to the image plane in proper order: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, and a sixth lens;
the object plane side of the first lens is a convex surface, the image plane side is a concave surface, and the focal power of the first lens is negative;
the object plane side of the second lens is a concave surface, the image plane 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 convex surface, the image plane side 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 is a concave surface, and the focal power of the fourth lens is negative;
the image plane side of the fifth lens is a convex surface, the image plane side is a convex surface, and the focal power of the fifth lens is positive;
the object plane side of the sixth lens is a convex surface, the image plane side is a concave surface, and the focal power of the sixth lens is positive.
The camera module of the embodiment of the invention mainly comprises 6 lenses, and has reasonable lens number, simple structure, small volume, light weight and low cost; the lens has the advantages of high resolution, large aperture, wide visible range, 3M Gao Qingcheng image, excellent temperature compensation characteristic and good day and night complete confocal performance by adopting the mutual combination of different lenses and reasonably distributing the focal power. The method is particularly suitable for the monitoring fields of visual intelligent doorbell, IPC and the like.
Description of the drawings:
in order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an embodiment of an image capturing module according to the present invention;
FIG. 2 is a graph of the MTF transfer function of an embodiment of the camera module of the present invention;
fig. 3 is a relative illuminance diagram of an embodiment of an imaging module of the present invention.
The specific embodiment is as follows:
in order to make the technical problems, technical schemes and beneficial effects solved by the invention more clear, the 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 for purposes of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1, this embodiment discloses a large aperture ultra-large wide angle monitoring camera module, including in order from object plane to 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, and a sixth lens 6.
The object plane side of the first lens is a convex surface, the image plane side is a concave surface, and the focal power of the first lens is negative;
the object plane side of the second lens is a concave surface, the image plane 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 convex surface, the image plane side 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 is a concave surface, and the focal power of the fourth lens is negative;
the image plane side of the fifth lens is a convex surface, the image plane side is a convex surface, and the focal power of the fifth lens is positive;
the object plane side of the sixth lens is a convex surface, the image plane side is a concave surface, and the focal power of the sixth lens is positive.
The optical system of the embodiment of the invention mainly comprises 6 lenses, and has reasonable lens number, simple structure, small volume, light weight and low cost; the lens has the advantages of high resolution, large aperture, wide visible range, 3M Gao Qingcheng image, excellent temperature compensation characteristic and good day and night complete confocal performance by adopting the mutual combination of different lenses and reasonably distributing the focal power. The method is particularly suitable for the monitoring fields of visual intelligent doorbell, IPC and the like.
Further, as a preferred embodiment of the present invention, not limiting, each lens of the optical system satisfies the following condition:
(1)1.45＜∣f1/f∣＜2.5；
(2)5＜∣f2/f∣；
(3)0.8＜∣f3/f4∣＜1.2；
(4)0.6＜∣f4/f5∣＜0.96；
(5)10＜∣f6/f∣；
wherein f is the focal length of the whole optical system, f1 is the focal length of the first lens, f2 is the focal length of the second lens, f3 is the focal length of the third lens, f4 is the focal length of the fourth lens, f5 is the focal length of the fifth lens, and f6 is the focal length of the sixth lens. The lens has the advantages of high resolution, large aperture, wide visible range, 3M Gao Qingcheng image, excellent temperature compensation characteristic and good day and night complete confocal performance by adopting the mutual combination of different lenses and reasonably distributing the focal power.
Still further, as a preferred embodiment of the present invention, but not limiting, the aperture stop is located between the second lens and the third lens, near the third lens side. For adjusting the intensity of the light beam.
Further, as a preferred embodiment of the present invention, but not limited to, the refractive index Nd1 of the material, the abbe constant Vd1 of the material, the focal length f1, and the system focal length f of the first lens satisfy: 1.65< Nd1<1.92, 30< Vd1<60,1.45 < |f1/f| < 2.5. The structure is simple, and good optical performance can be ensured.
Still further, as a preferred embodiment of the present invention, without limitation, the refractive index Nd3 of the material and the abbe constant Vd3 of the material of the third lens satisfy: 1.4< Nd3<1.65, 50< Vd3<95. The structure is simple, and good optical performance can be ensured.
Still further, as a preferred embodiment of the present invention, without limitation, the refractive index Nd2 of the material, the abbe constant Vd2 of the second lens satisfy: 1.56< Nd2<1.70, 10< Vd2<35. The structure is simple, and good optical performance can be ensured.
Further, as a preferred embodiment of the present invention, without limitation, the material refractive index Nd4, the material abbe constant Vd4 of the fourth lens satisfy: 1.56< Nd4<1.70, 10< Vd4<35. The structure is simple, and good optical performance can be ensured.
Still further, as a preferred embodiment of the present invention, without limitation, the refractive index Nd5 of the material and the abbe constant Vd5 of the material of the fifth lens satisfy: 1.45< Nd5<1.60, 35< Vd5<60. The structure is simple, and good optical performance can be ensured.
Still further, as a preferred embodiment of the present invention, without limitation, the refractive index Nd6 of the material, the abbe constant Vd6 of the material, the focal length f6, and the system focal length f of the sixth lens satisfy: 1.45< Nd6<1.60, 35< Vd6<60, 10< |f6/f|. The structure is simple, and good optical performance can be ensured.
Further, as a preferred embodiment of the present invention, and not by way of limitation, the optical total length TTL satisfies: 10mm < TTL <15mm. The structure is simple, and good optical performance can be ensured.
Still further, as a preferred embodiment of the present invention, but not limited thereto, the first lens and the third lens are glass lenses; the second lens, the fourth lens, the fifth lens and the sixth lens are plastic aspheric lenses. By using the glass-plastic mixed structure, the focal power of the lens is reasonably distributed, the aberration of the lens is optimized, and the performance of the lens is optimized while the cost is reduced.
Specifically, as a preferred embodiment of the present invention, but not limited to, in this example, the focal length f=2.12 mm, the stop index F/no=2.0, the field angle dfov=190°, the total optical length ttl=12.58 mm, and the basic parameters of the present optical system are as follows:
| surface of the body | Radius of curvature R (mm) | Interval D (mm) | Refractive index Nd | Dispersion value Vd |
| S1 | 10.65 | 0.80 | 1.73 | 51.49 |
| S2 | 2.03 | 1.95 | ||
| S3 | -5.96 | 1.90 | 1.66 | 20.37 |
| S4 | -3.99 | 0.22 | ||
| STO | Infinity (infinity) | -0.12 | ||
| S6 | 3.83 | 1.80 | 1.57 | 71.31 |
| S7 | -3.36 | 0.54 | ||
| S8 | -3.04 | 0.50 | 1.66 | 20.37 |
| S9 | 8.07 | 0.10 | ||
| S10 | -16.42 | 1.25 | 1.53 | 56.07 |
| S11 | -2.03 | 0.10 | ||
| S12 | 3.33 | 1.00 | 1.53 | 56.07 |
| S13 | 3.78 | 0.45 | ||
| IMA | Infinity (infinity) | 0.00 |
In the table, from the object plane to the image plane 8 along the optical axis, S1 and S2 are two surfaces of the first lens 1; s3 and S4 correspond to two surfaces of the second lens 2; STO is the diaphragm 7; s6 and S7 correspond to two surfaces of the third lens 3; s8 and S9 correspond to two surfaces of the fourth lens 4; s10 and S11 correspond to two surfaces of the fifth lens 5; s12 and S13 correspond to two surfaces of the sixth lens 6; IMA is the image plane 8.
Still further, as a preferred embodiment of the present invention, without limitation, the surfaces of the second lens 2, the fourth lens 3, the fifth lens 5 and the sixth lens 6 are aspherical in shape, which satisfies the following equation:
wherein, the parameter c=1/R is the curvature corresponding to the radius, y is the radial coordinate, the unit is the same as the lens length unit, k is the conic coefficient, a 1 To a 8 The coefficients corresponding to the radial coordinates are respectively obtained. The aspherical correlation values of the second lens 2, the fourth lens 3, the fifth lens 5 and the sixth lens 6 are shown in the following table:
as can be seen from fig. 2 to 3, the optical system of the present embodiment has the advantages of high resolution, large aperture, wide visible range, 3M Gao Qingcheng image, excellent temperature compensation characteristics, and complete confocal performance from day to night.
The foregoing description of one or more embodiments provided in connection with the specific disclosure is not intended to limit the practice of the invention to such description. The method, structure, etc. similar to or identical to those of the present invention, or some technical deductions or substitutions are made on the premise of the inventive concept, should be regarded as the protection scope of the present invention.
Claims (1)
1. The large-aperture ultra-large wide-angle monitoring camera module at least comprises an optical lens, wherein a large-aperture ultra-large wide-angle monitoring optical system is arranged in the optical lens, and the optical system sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from an object plane to an image plane along an optical axis; it is characterized in that the method comprises the steps of,
the object plane side of the first lens is a convex surface, the curvature radius is 10.65mm, the image plane side is a concave surface, the curvature radius is 2.03mm, the focal power is negative, the thickness is 0.8mm, the refractive index is 1.73, and the distance from the first lens to the second lens is 1.95mm;
the object plane side of the second lens is concave, the curvature radius is-5.96 mm, the image plane side is convex, the curvature radius is-3.99 mm, the focal power is positive, the thickness is 1.90mm, the refractive index is 1.66, and the distance from the second lens to the third lens is 0.10mm;
the object plane side of the third lens is a convex surface, the curvature radius is 3.83mm, the image plane side is a convex surface, the curvature radius is-3.36 mm, the focal power is positive, the thickness is 1.80mm, the refractive index is 1.57, and the distance from the third lens to the fourth lens is 0.54mm;
the object plane side of the fourth lens is a concave surface, the curvature radius is-3.04 mm, the image plane side is a concave surface, the curvature radius is 8.07mm, the focal power is negative, the thickness is 0.50mm, the refractive index is 1.66, and the distance from the fourth lens to the fifth lens is 0.10mm;
the curvature radius of the object plane side of the fifth lens is-16.42 mm, the image plane side is a convex surface, the curvature radius is-2.03 mm, the focal power is positive, the thickness is 1.25mm, the refractive index is 1.53, and the distance from the fifth lens to the sixth lens is 0.10mm;
the object plane side of the sixth lens is a convex surface, the curvature radius is 3.33mm, the image plane side is a concave surface, the curvature radius is 3.78mm, the focal power is positive, the thickness is 1.00mm, and the refractive index is 1.53.
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| CN202010569576.5A CN111880286B (en) | 2020-06-20 | 2020-06-20 | Large aperture ultra-large wide angle monitoring camera module |
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| CN107121756A (en) * | 2017-06-28 | 2017-09-01 | 浙江舜宇光学有限公司 | Optical imaging system |
| CN108072966A (en) * | 2016-11-15 | 2018-05-25 | 宁波舜宇车载光学技术有限公司 | Optical lens |
| CN108761737A (en) * | 2018-07-26 | 2018-11-06 | 浙江舜宇光学有限公司 | Optical imaging system |
| CN109541785A (en) * | 2019-01-22 | 2019-03-29 | 浙江舜宇光学有限公司 | Optical lens group |
| CN111781702A (en) * | 2020-06-20 | 2020-10-16 | 广东弘景光电科技股份有限公司 | Large-aperture super-large wide-angle monitoring optical system |
| CN212873035U (en) * | 2020-06-20 | 2021-04-02 | 广东弘景光电科技股份有限公司 | Large-aperture super-large wide-angle monitoring optical system and camera module applying same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019000986A1 (en) * | 2017-06-28 | 2019-01-03 | 浙江舜宇光学有限公司 | Optical imaging system |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108072966A (en) * | 2016-11-15 | 2018-05-25 | 宁波舜宇车载光学技术有限公司 | Optical lens |
| CN107121756A (en) * | 2017-06-28 | 2017-09-01 | 浙江舜宇光学有限公司 | Optical imaging system |
| CN108761737A (en) * | 2018-07-26 | 2018-11-06 | 浙江舜宇光学有限公司 | Optical imaging system |
| CN109541785A (en) * | 2019-01-22 | 2019-03-29 | 浙江舜宇光学有限公司 | Optical lens group |
| CN111781702A (en) * | 2020-06-20 | 2020-10-16 | 广东弘景光电科技股份有限公司 | Large-aperture super-large wide-angle monitoring optical system |
| CN212873035U (en) * | 2020-06-20 | 2021-04-02 | 广东弘景光电科技股份有限公司 | Large-aperture super-large wide-angle monitoring optical system and camera module applying same |
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