CN208872936U - A kind of optical lens and auto-panorama reverse image - Google Patents
A kind of optical lens and auto-panorama reverse image Download PDFInfo
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- CN208872936U CN208872936U CN201821906800.XU CN201821906800U CN208872936U CN 208872936 U CN208872936 U CN 208872936U CN 201821906800 U CN201821906800 U CN 201821906800U CN 208872936 U CN208872936 U CN 208872936U
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Abstract
The utility model provides a kind of optical lens, and resolving power is high, and optical distortion is small, reduces Lens, improves the comprehensive performance and save the cost of camera lens, including set gradually from object space to image space front lens group, diaphragm, rear lens group；Front lens group includes: the first lens, has negative power, the object plane side of the first lens is convex surface, and image planes side is concave surface；Second lens have negative power, and the object plane side of the second lens is convex surface, and image planes side is concave surface；The third lens have positive light coke, and the object plane side of the third lens is convex surface, and image planes side is convex surface；Rear lens group includes: the 4th lens, has negative power, the object plane side of the 4th lens is convex surface, and image planes side is concave surface；5th lens have positive light coke, and the object plane side of the 5th lens is convex surface, and image planes side is convex surface；4th lens and the 5th optics of lens are cementing, meanwhile, the utility model, which additionally provides, contains the auto-panorama reverse image of the optical lens.
Description
Technical field
The utility model relates to optical lens technology field, specially a kind of optical lens and auto-panorama reverse image.
Background technique
With the development of society, automotive safety is more and more paid attention to, relevant criterion is also higher and higher, especially may be used
Depending on reverse radar system.Video vehicle back radar is when hanging reverse gear shift, and system meeting turn on automatically is located at the high-definition camera of the tailstock
Head clearly indicates situation after vehicle on liquid crystal display.Existing reversing radar on-vehicle lens, using more the piece number come
Reach preferable image quality, not only heavier-weight, volume are big, but also production cost is higher；And horizontal field of view angle generally 120 ° with
Under；And it is more sensitive to temperature change, under high temperature or cryogenic conditions, image blur；It is most of excessive in the presence of distorting, so that at
As the significant image distortions come out, image judges distance.
Utility model content
In view of the above-mentioned problems, the utility model provides a kind of optical lens, resolving power is high, and optical distortion is small, type minifier
Area of bed improves the comprehensive performance of camera lens and has saved cost, meanwhile, the utility model, which additionally provides, contains the optical lens
Auto-panorama reverse image.
Its technical solution is such that a kind of optical lens, which is characterized in that including what is set gradually from object space to image space
Front lens group, diaphragm, rear lens group；
The front lens group includes setting gradually from object space to image space:
First lens, have negative power, and the object plane side of first lens is convex surface, the image planes side of first lens
For concave surface；
Second lens, have negative power, and the object plane side of second lens is convex surface, the image planes side of second lens
For concave surface；
The third lens, have positive light coke, and the object plane side of the third lens is convex surface, the image planes side of the third lens
For convex surface；
The rear lens group includes setting gradually from object space to image space:
4th lens, have negative power, and the object plane side of the 4th lens is convex surface, the image planes side of the 4th lens
For concave surface；
5th lens, have positive light coke, and the object plane side of the 5th lens is convex surface, the image planes side of the 5th lens
For convex surface；
Wherein, the 4th lens and the 5th optics of lens are cementing；
Meanwhile meeting following relationship:
- 7 < f1 < -6, -4 < f2 < -3,3 < f3 < 4, -4 < f4 < -3,1 < f5 < 2,
- 5 < f1/f < -4, -3 < f2/f < -2,2 < f3/f < 3, -3 < f4/f < -2,1 < f5/f < 2,
Wherein, f1 is the focal length value of the first lens, and f2 is the focal length value of the second lens, and f3 is the focal length value of the third lens,
F4 is the focal length value of the 4th lens, and f5 is the focal length value of the 5th lens, and f is the focal length value of optical lens.
Further, first lens are glass lens, and second lens are plastic lens, and the third lens are
Plastic lens, the 4th lens are plastic lens, and the 5th lens are plastic lens.
Further, two sides of first lens are spherical surface, and two sides of second lens are non-
Spherical surface, two sides of the third lens be it is aspherical, the object plane sides of the 4th lens be it is aspherical, the described 5th thoroughly
Two sides of mirror are aspherical.
Further, first lens also meet the following conditions: 1.6 < Nd1 <, 1.9,50 < Vd1 < 70；Wherein, institute
The optical index that Nd1 is the first lens is stated, the Vd1 is the Abbe constant of the first lens；
Second lens also meet the following conditions: 1.4 < Nd2 <, 1.7,50 < Vd2 < 70；Wherein, the Nd2 is the
The optical index of two lens, the Vd2 are the Abbe constant of the second lens；
The third lens also meet the following conditions: 1.4 < Nd3 <, 1.8,20 < Vd3 < 40；Wherein, the Nd3 is the
The optical index of three lens, the Vd3 are the Abbe constant of the third lens；
4th lens also meet the following conditions: 1.4 < Nd4 <, 1.8,20 < Vd4 < 40；Wherein, the Nd4 is the
The optical index of four lens, the Vd4 are the Abbe constant of the 4th lens；
5th lens also meet the following conditions: 1.3 < Nd5 <, 1.7,50 < Vd5 < 70；Wherein, the Nd5 is the
The optical index of five lens, the Vd5 are the Abbe constant of the 5th lens.
Further, the following formula of aspherical satisfaction of the second lens, the third lens, the 4th lens, the 5th lens:
Wherein, Z (h) be it is aspherical along optical axis direction when being highly the position of h, away from aspheric vertex of surface apart from rise, c
=1/r, r indicate the radius of curvature of aspherical mirror, and k is circular cone coefficient conic, and A, B, C, D are respectively high order aspheric surface coefficient.
It further, further include IR filter plate and protection glass, it is separate that the IR filter plate is located at the 5th lens
The side of object space, the protection glass are located at the side of the IR filter plate far from object space.
Further, the optical lens meets following relationship: TTL < 13mm；
Wherein, TTL refers to the length of the optical lens.
Further, the optical lens meets maximum imaging circle
Further, the optical lens meets horizontal field of view angle >=120 °.
A kind of auto-panorama reverse image, including above-mentioned optical lens and image sensor.
The optical lens of the utility model has the advantage that its horizontal field of view angle >=120 °, and pixel reaches million, improves
Image quality, optical distortion is small, anamorphose is small；Using smaller optics overall length, the volume of camera lens is reduced, length is more
It is short；With high pass light ability, higher resolving power, maximum imaging circleAnd image is limpid in sight, is suitable for
In terms of auto-panorama reverse image and wide-angle vehicle-mounted monitoring, guarantee that reversing process sees bigger range；IR is added in camera lens rear end
Optical filter filters out interference of the infrared band to imaging, effectively improves the image quality of camera lens.Using different material and difference
Lens curvature, improve the comprehensive performance of camera lens and saved cost；Front lens group includes glass lens, fire prevention, resistance to height
Warm, resistance to high humidity and Anti-scratching have effectively widened the high temperature resistant of camera lens, the ability of resistance to high humidity, and Anti-scratching, have improved vehicle-mounted mirror
Stability of the head to adverse circumstances work.
Detailed description of the invention
Fig. 1 is the structure constitutional diagram of the optical lens of the utility model；
Fig. 2 is the MTF curve figure of the optical lens in embodiment；
Fig. 3 is the distortion curve of the optical lens in embodiment；
Fig. 4 is the defocusing curve figure of the optical lens in embodiment.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
See that Fig. 1, the utility model provide a kind of optical lens, including the front lens group set gradually from object space to image space
Group 100, diaphragm 200, rear lens group 300, imaging surface 400；In Fig. 1, object space is located at the left side in figure, and image space is located in figure
Right side, the left side of Cong Tuzhong to right side is from object space to image space.
Front lens group 100 should be set to object space and specifically include from object space to image space successively that is, apart from the closer side of object
It is arranged:
First lens 110, have negative power, and the object plane side 111 of the first lens is convex surface, the image planes side of the first lens
112 be concave surface；
Second lens 120, have negative power, and the object plane side 121 of the second lens is convex surface, the image planes side of the second lens
122 be concave surface；
The third lens 130, have positive light coke, and the object plane side 131 of the third lens is convex surface, the image planes side of the third lens
132 be convex surface；
Rear lens group 300 with and front lens group 100 be arranged with primary optical axis, be provided close to 400 side of imaging surface, it is rear saturating
Lens group group 300, which is specifically included, to be set gradually from object space to image space:
4th lens 310, have negative power, and the object plane side 311 of the 4th lens is convex surface, the image planes side of the 4th lens
322 be concave surface；
5th lens 320, have positive light coke, and the object plane side 321 of the 5th lens is convex surface, the image planes side of the 5th lens
322 be convex surface；
Wherein, the 4th lens 310 and 320 optics of the 5th lens are cementing,
Meanwhile meeting following relationship:
- 7 < f1 < -6, -4 < f2 < -3,3 < f3 < 4, -4 < f4 < -3,1 < f5 < 2,
- 5 < f1/f < -4, -3 < f2/f < -2,2 < f3/f < 3, -3 < f4/f < -2,1 < f5/f < 2,
Wherein, f1 is the focal length value of the first lens, and f2 is the focal length value of the second lens, and f3 is the focal length value of the third lens,
F4 is the focal length value of the 4th lens, and f5 is the focal length value of the 5th lens, and f is the focal length value of optical lens.
In the present embodiment, it is preferred that the first lens 110 are glass lens, and the second lens 120 are plastic lens, third
Lens 130 are plastic lens, and the 4th lens 310 are plastic lens, and the 5th lens 320 are plastic lens, close to the of object space
The material of one lens is set as glass lens, and fire prevention, high temperature resistant, resistance to high humidity and the Anti-scratching energy of the optical lens can be improved
Power improves the stability that optical lens works in harsh environment.Its apart from farther away second lens in object side, the third lens,
4th lens, the 5th lens are set as glass lens, it is possible to reduce the total weight of the optical lens.
In the present embodiment, two sides of the first lens 110 are spherical surface, and two sides of the second lens 120 are
It is aspherical, two sides of the third lens 130 be it is aspherical, the object plane sides of the 4th lens 310 is aspherical, the 5th lens
320 two sides are aspherical.
Second lens, the third lens, the 4th lens, the 5th lens the following formula of aspherical satisfaction:
Wherein, Z (h) be it is aspherical along optical axis direction when being highly the position of h, away from aspheric vertex of surface apart from rise, c
=1/r, r indicate the radius of curvature of aspherical mirror, and k is circular cone coefficient conic, and A, B, C, D are respectively high order aspheric surface coefficient.
Preferential, the first lens also meet the following conditions: 1.6 < Nd1 <, 1.9,50 < Vd1 < 70；Wherein, Nd1
The optical index of one lens, Vd1 are the Abbe constant of the first lens；
Second lens also meet the following conditions: 1.4 < Nd2 <, 1.7,50 < Vd2 < 70；Wherein, Nd2 is the second lens
Optical index, Vd2 are the Abbe constant of the second lens；
The third lens also meet the following conditions: 1.4 < Nd3 <, 1.8,20 < Vd3 < 40；Wherein, Nd3 is the third lens
Optical index, Vd3 are the Abbe constant of the third lens；
4th lens also meet the following conditions: 1.4 < Nd4 <, 1.8,20 < Vd4 < 40；Wherein, Nd4 is the 4th lens
Optical index, Vd4 are the Abbe constant of the 4th lens；
5th lens also meet the following conditions: 1.3 < Nd5 <, 1.7,50 < Vd5 < 70；Wherein, Nd5 is the 5th lens
Optical index, Vd5 are the Abbe constant of the 5th lens.
In order to advanced optimize the performance of optical lens, the optical lens of present embodiment further include IR filter plate 500 with
And protection glass 600.Specifically, IR filter plate 500 is located at the 5th side of the lens 320 far from object space, and protection glass 600 is located at
Side of the IR filter plate 500 far from object space, the main function of IR filter plate 500 are the interference for filtering infrared band to imaging, are had
Effect improves the image quality of camera lens, and the main function of protection glass 600 is for protecting image sensor.
Meanwhile the optical lens of the present embodiment meets following relationship: TTL < 13mm；Wherein, TTL refers to the length of optical lens
Degree；Optical lens meets maximum imaging circleOptical lens meets horizontal field of view angle >=120 °.
The utility model additionally provides a kind of auto-panorama reverse image.
A kind of auto-panorama reverse image, including above-mentioned optical lens and image sensor.
Above-mentioned auto-panorama reverse image, due to using optical lens provided by the utility model, horizontal field of view angle
>=120 °, pixel reaches million, improves image quality, and optical distortion is small, and anamorphose is small；Using smaller optics overall length,
The volume of camera lens is reduced, length is shorter；With high pass light ability, higher resolving power, maximum imaging circle
And image is limpid in sight, guarantees that reversing process sees bigger range.
In a specific embodiment, the application provides a kind of optical lens, including sets gradually from object space to image space
Front lens group, diaphragm, rear lens group, IR filter plate and protection glass；
Front lens group includes setting gradually from object space to image space:
First lens have negative power, and the object plane side of the first lens is convex surface, and the image planes side of the first lens is concave surface,
First lens are glass lens, and two sides of the first lens are spherical surface；
Second lens have negative power, and the object plane side of the second lens is convex surface, and the image planes side of the second lens is concave surface,
Second lens are plastic lens, and two sides of the second lens are aspherical；
The third lens have positive light coke, and the object plane side of the third lens is convex surface, and the image planes side of the third lens is convex surface,
The third lens are plastic lens, and two sides of the third lens are aspherical；
Rear lens group includes setting gradually from object space to image space:
4th lens have negative power, and the object plane side of the 4th lens is convex surface, and the image planes side of the 4th lens is concave surface,
4th lens are plastic lens, and the object plane side of the 4th lens is aspherical；
5th lens have positive light coke, and the object plane side of the 5th lens is convex surface, and the image planes side of the 5th lens is convex surface,
5th lens are plastic lens, and two sides of the 5th lens are aspherical；
Wherein, the 4th lens and the 5th optics of lens are cementing.
In this embodiment, the first lens, the second lens, the third lens, diaphragm, the 4th lens, the 5th lens, IR filtering
Piece, protection glass meet following condition as shown:
Preferably, IR filter plate uses the optical glass for selecting that line refractive index is 64 for 1.52, Abbe constant；Preferably,
It is 1.52 that protection glass 9, which selects refractive index, the optical glass that Abbe constant is 64.
Wherein, the object plane side 121 of the second lens, the image planes side 121 of the second lens, the object plane side 131 of the third lens, third
The image planes side 122 of lens, the object plane side 311 of the 4th lens, the object plane side 321 of the 5th lens, the image planes side 322 of the 5th lens are equal
To be aspherical, asphericity coefficient specifically be see the table below:
Optic test is carried out to the optical lens in above-described embodiment, Fig. 2 is the MTF of the optical lens in above-described embodiment
Curve graph, abscissa is spatial frequency in Fig. 2, and ordinate is contrast；TS Diff.Limit is spreading out for meridian and sagitta of arc direction
Emitter-base bandgap grading limit, TS 0.00 (deg) indicate the diffraction curve of meridian and sagitta of arc direction in 0.00 visual field of image planes；MTF is to use at present
A kind of commonplace image quality evaluation index, referred to as modulation transfer function.Modulation transfer function: picture under certain space frequency
Contrast and the ratio between the contrast of object.It can reflect the transmission capacity of different space frequency, different contrast.Modulation transfer function
MTF can be used for indicating the feature of optical system, and MTF is bigger, indicate that the image quality of system is better, from Figure 2 it can be seen that the present embodiment
In optical lens good imaging quality.
Fig. 3 is the distortion curve of the optical lens in above-described embodiment, and left figure is field curve figure, the vertical seat of curvature of field figure
Mark is field angle, and abscissa is the distance that picture point deviates near-axis image surface, and T indicates that meridianal curvature of field, S indicate Sagittal field curvature.Right figure is
Distortion curve, the ordinate of distortion figure are field angles, and abscissa is distortion percentage, and field curve is shown as visual field coordinate
The current focal plane of function or as plane is to the distance of paraxial focal plane, is divided into meridianal curvature of field and Sagittal field curvature.Distortion belongs to master
Ray aberration, the similarity degree of reflection elephant, the optical lens in the specific embodiment, optical distortion is smaller, image definition.
Fig. 4 is the defocusing curve figure of the optical lens in above-described embodiment, and abscissa defocusing amount is indulged in millimeters
Coordinate contrast.TS 0.00 (deg) indicates the diffraction curve of meridian and sagitta of arc direction in 0.00 visual field of image planes；Defocusing curve
What figure indicated is the nearly focal length displacement of coloured light of different wave length in system operating wavelength range.Check different visual fields, a certain defocus
The transfer function values in range at special disease frequency are measured, from fig. 4, it can be seen that the good imaging quality of the optical lens in the present embodiment.
It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and
And without departing substantially from the spirit or essential attributes of the utility model, it can realize that this is practical new in other specific forms
Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this is practical new
The range of type is indicated by the appended claims rather than the foregoing description, it is intended that containing for the equivalent requirements of the claims will be fallen in
All changes in justice and range are embraced therein.It should not treat any reference in the claims as limiting
Related claim.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (10)
1. a kind of optical lens, which is characterized in that including set gradually from object space to image space front lens group, diaphragm, it is rear thoroughly
Lens group group；
The front lens group includes setting gradually from object space to image space:
First lens have negative power, and the object plane side of first lens is convex surface, and the image planes side of first lens is recessed
Face；
Second lens have negative power, and the object plane side of second lens is convex surface, and the image planes side of second lens is recessed
Face；
The third lens have positive light coke, and the object plane side of the third lens is convex surface, and the image planes side of the third lens is convex
Face；
The rear lens group includes setting gradually from object space to image space:
4th lens have negative power, and the object plane side of the 4th lens is convex surface, and the image planes side of the 4th lens is recessed
Face；
5th lens have positive light coke, and the object plane side of the 5th lens is convex surface, and the image planes side of the 5th lens is convex
Face；
Wherein, the 4th lens and the 5th optics of lens are cementing；
Meanwhile meeting following relationship:
- 7 < f1 < -6, -4 < f2 < -3,3 < f3 < 4, -4 < f4 < -3,1 < f5 < 2,
- 5 < f1/f < -4, -3 < f2/f < -2,2 < f3/f < 3, -3 < f4/f < -2,1 < f5/f < 2,
Wherein, f1 is the focal length value of the first lens, and f2 is the focal length value of the second lens, and f3 is the focal length value of the third lens, and f4 is
The focal length value of 4th lens, f5 are the focal length value of the 5th lens, and f is the focal length value of optical lens.
2. a kind of optical lens according to claim 1, it is characterised in that: first lens are glass lens, described
Second lens are plastic lens, and the third lens are plastic lens, and the 4th lens are plastic lens, the 5th lens
For plastic lens.
3. a kind of optical lens according to claim 1, it is characterised in that: two sides of first lens are ball
Face, two sides of second lens be it is aspherical, two sides of the third lens be it is aspherical, the described 4th
The object plane side of lens be it is aspherical, two sides of the 5th lens are aspherical.
4. a kind of optical lens according to claim 1, it is characterised in that: first lens also meet the following conditions:
1.6 < Nd1 <, 1.9,50 < Vd1 < 70；Wherein, the Nd1 is the optical index of the first lens, and the Vd1 is the first lens
Abbe constant；
Second lens also meet the following conditions: 1.4 < Nd2 <, 1.7,50 < Vd2 < 70；Wherein, the Nd2 is second saturating
The optical index of mirror, the Vd2 are the Abbe constant of the second lens；
The third lens also meet the following conditions: 1.4 < Nd3 <, 1.8,20 < Vd3 < 40；Wherein, the Nd3 is that third is saturating
The optical index of mirror, the Vd3 are the Abbe constant of the third lens；
4th lens also meet the following conditions: 1.4 < Nd4 <, 1.8,20 < Vd4 < 40；Wherein, the Nd4 is the 4th saturating
The optical index of mirror, the Vd4 are the Abbe constant of the 4th lens；
5th lens also meet the following conditions: 1.3 < Nd5 <, 1.7,50 < Vd5 < 70；Wherein, the Nd5 is the 5th saturating
The optical index of mirror, the Vd5 are the Abbe constant of the 5th lens.
5. a kind of optical lens according to claim 3, it is characterised in that: the second lens, the third lens, the 4th lens,
The following formula of aspherical satisfaction of 5th lens:
Wherein, Z (h) be it is aspherical along optical axis direction when being highly the position of h, away from aspheric vertex of surface apart from rise, c=1/
R, r indicate the radius of curvature of aspherical mirror, and k is circular cone coefficient conic, and A, B, C, D are respectively high order aspheric surface coefficient.
6. a kind of optical lens according to claim 1, it is characterised in that: further include IR filter plate and protection glass,
The IR filter plate is located at side of the 5th lens far from object space, and the protection glass is located at the IR filter plate far from object
The side of side.
7. a kind of optical lens according to claim 1, it is characterised in that: the optical lens meets following relationship:
TTL < 13mm；
Wherein, TTL refers to the length of the optical lens.
8. a kind of optical lens according to claim 1, it is characterised in that: the optical lens meets maximum imaging circle
9. a kind of optical lens according to claim 1, it is characterised in that: the optical lens meet horizontal field of view angle >=
120°。
10. a kind of auto-panorama reverse image, it is characterised in that: including the described in any item optical lens of claim 1-9 with
And image sensor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821906800.XU CN208872936U (en) | 2018-11-20 | 2018-11-20 | A kind of optical lens and auto-panorama reverse image |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821906800.XU CN208872936U (en) | 2018-11-20 | 2018-11-20 | A kind of optical lens and auto-panorama reverse image |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110412744A (en) * | 2019-07-31 | 2019-11-05 | 福建福光天瞳光学有限公司 | A kind of novel rearview optical system and its manufacturing method |
| CN110568595A (en) * | 2019-10-16 | 2019-12-13 | 协益电子（苏州）有限公司 | Small-distortion infrared optical lens and auxiliary driving monitor |
| CN114265185A (en) * | 2021-12-23 | 2022-04-01 | 上海峰梅光学科技有限公司 | Optical lens and imaging device |
-
2018
- 2018-11-20 CN CN201821906800.XU patent/CN208872936U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110412744A (en) * | 2019-07-31 | 2019-11-05 | 福建福光天瞳光学有限公司 | A kind of novel rearview optical system and its manufacturing method |
| CN110412744B (en) * | 2019-07-31 | 2023-11-14 | 福建福光天瞳光学有限公司 | Novel rearview optical system and manufacturing method thereof |
| CN110568595A (en) * | 2019-10-16 | 2019-12-13 | 协益电子（苏州）有限公司 | Small-distortion infrared optical lens and auxiliary driving monitor |
| CN110568595B (en) * | 2019-10-16 | 2024-04-05 | 协益电子（苏州）有限公司 | Small-distortion infrared optical lens and auxiliary driving monitor |
| CN114265185A (en) * | 2021-12-23 | 2022-04-01 | 上海峰梅光学科技有限公司 | Optical lens and imaging device |
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