CN109975960A - One kind looking around wide-angle without thermalization camera lens and automobile panoramic round-looking system - Google Patents
One kind looking around wide-angle without thermalization camera lens and automobile panoramic round-looking system Download PDFInfo
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- CN109975960A CN109975960A CN201910339445.5A CN201910339445A CN109975960A CN 109975960 A CN109975960 A CN 109975960A CN 201910339445 A CN201910339445 A CN 201910339445A CN 109975960 A CN109975960 A CN 109975960A
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- 230000003287 optical effect Effects 0.000 claims abstract description 26
- 239000011521 glass Substances 0.000 claims description 21
- 239000000571 coke Substances 0.000 claims description 2
- 238000009738 saturating Methods 0.000 claims 4
- 230000004304 visual acuity Effects 0.000 abstract description 2
- 238000003384 imaging method Methods 0.000 description 8
- 230000006870 function Effects 0.000 description 7
- 241000700608 Sagitta Species 0.000 description 5
- 230000000007 visual effect Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004438 eyesight Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000005304 optical glass Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 241000406668 Loxodonta cyclotis Species 0.000 description 1
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- 230000001276 controlling effect Effects 0.000 description 1
- 230000003138 coordinated effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
- G02B1/041—Lenses
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/06—Panoramic objectives; So-called "sky lenses" including panoramic objectives having reflecting surfaces
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
Abstract
The present invention provides one kind to look around wide-angle without thermalization camera lens, resolving power is high, optical distortion is small, reduce Lens, improve the comprehensive performance of camera lens and saved cost comprising set gradually from object space to image space: the first lens have negative focal power, the object plane side of first lens is convex surface, and the image planes side of the first lens is concave surface；Second lens have negative focal 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；The third lens have positive focal power, and the object plane side of the third lens is convex surface, and the image planes side of the third lens is convex surface；4th lens have negative focal power, and the object plane side of the 4th lens is convex surface, and the image planes side of the third lens is concave surface；5th lens have positive focal power, and the object plane side of the 5th lens is convex surface, and the image planes side of the third lens is convex surface；Wherein, the 4th lens and the 5th optics of lens are cementing；Meanwhile automobile panoramic round-looking system of the wide-angle without thermalization camera lens is looked around the present invention also provides this is contained.
Description
Technical field
The present invention relates to optical lens technology field, specially one kind is looked around wide-angle and is looked around without thermalization camera lens and auto-panorama
System.
Background technique
With the fast development of image and computer vision technique, more and more technologies are applied to automotive electronics neck
Domain, traditional reverse image system based on image only install camera in the tailstock, can only cover limited region around the tailstock,
And the blind area of vehicle periphery and headstock undoubtedly increases the hidden danger of safe driving, is easy in the urban district of narrow congestion and parking lot
Now collision and scratch event.To expand driver's seat, the environment of perception 360 ° omni-directional just must be able to, this just needs multiple views
Feel then the mutual coordinated effect of sensor is handled by Video Composition, forms the video figure of a whole set of around full vehicle
Picture, is exactly this kind of demand, and Full view vision parking assisting system comes into being.
Panoramic looking-around system sets up in motor vehicle environment and can cover 4 to 8 of all field ranges of vehicle-surroundings and look around camera shooting
Head, to the collected multi-channel video image processing of synchronization at 360 degree of a width vehicle-surroundings of vehicle body top view, finally in
It controls and is shown on the screen of platform, allow driver to understand and check vehicle-surroundings whether there are obstacles and understands the relative bearing of barrier
With distance, the light parked vehicle of driver is helped.It is not only very intuitive, but also any blind spot is not present, driver can be improved
VEHICLES MUST PARK WITHIN THE MARKED BAY or by complex road surface for calm operating and controlling vehicle, the generation of accidents such as effectively reduces scratch, collide, subside.
Currently, pick-up lens main common wide-angle lens in the market, is generally distorted using all-glass construction excessive, or
Using only first piece of glass lens, other all use plastic material structure, and temperature-compensating performance is not good enough, is unable to satisfy high-end vehicle-mounted
Market application.Existing camera lens of looking around is there are many defects in the market, such as field angle is insufficient, distort excessive, high production cost, imaging
Quality is bad, temperature compensation characteristic is bad, structure is complicated, it is difficult to meet user demand.
Summary of the invention
In view of the above-mentioned problems, the present invention provides one kind to look around wide-angle without thermalization camera lens, resolving power is high, and optical distortion is small,
Lens are reduced, the comprehensive performance of camera lens is improved and has saved cost, meanwhile, the present invention also provides contain this to look around extensively
Automobile panoramic round-looking system of the angle without thermalization camera lens.
Its technical solution is such that one kind looks around wide-angle without thermalization camera lens comprising sets gradually from object space to image space
: front lens group, diaphragm and rear lens group；It is characterized by: the front lens group include from object space to image space according to
Secondary setting:
First lens, have negative focal power, and the object plane side of first lens is convex surface, the image planes of first lens
Side is concave surface；
Second lens, have negative focal power, and the object plane side of second lens is convex surface, the image planes of second lens
Side is concave surface；
The third lens, have positive focal power, and the object plane side of the third lens is convex surface, the image planes of the third lens
Side is convex surface；
The rear lens group includes setting gradually from object space to image space:
4th lens, have negative focal power, and the object plane side of the 4th lens is convex surface, the image planes of the third lens
Side is concave surface；
5th lens, have positive focal power, and the object plane side of the 5th lens is convex surface, the image planes of the third lens
Side is convex surface；
Wherein, the 4th lens and the 5th optics of lens are cementing；
Meanwhile meeting following relationship:
- 6 < f1 < -5, -4 < f2 < -23,2 < f3 < 3, -2 < f4 < -1,0 < f5 < 1,
-4<f1/f<-3,-3<f2/f<-2,1<f3/f<2,-1<f4/f<0,0<f5/f<1
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 to look around focal length value of the wide-angle without thermalization camera lens.
Further, first lens are glass lens, and second lens are plastic lens, and the third lens are
Glass 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-
Two sides of spherical surface, the third lens are spherical surface, two sides of the 4th lens be it is aspherical, the described 5th
Two sides of lens are aspherical.
Further, first lens also meet the following conditions: 1.7 < Nd1 <, 1.9,40 < Vd1 < 60；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: 1.5 < Nd2 <, 1.6,50 < 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: 1.7 < Nd3 <, 1.9,20 < Vd3 < 35；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: 1.5 < Nd4 <, 1.7,20 < Vd4 < 30；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: 1.4 < Nd5 <, 1.6,50 < Vd5 < 60；Wherein, the Nd5 is the
The optical index of five lens, the Vd5 are the Abbe constant of the 5th lens.
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, it looks around wide-angle and is greater than 200 ° without the full filed angle FOV of thermalization camera lens.
Further, Jiao Yiliang of the wide-angle without thermalization camera lens is looked around less than 10 μm.
Further, it looks around wide-angle to meet without the focal power distribution of thermalization camera lens: at -40 DEG C to 125 DEG C of high temperature ﹢ of low temperature
In section, coke moves the requirement within ± 10 μm.
Further, looking around optics overall length of the wide-angle without thermalization camera lens is TTL, and the wide-angle of looking around meets without thermalization camera lens
Following relationship: TTL < 13mm.
A kind of automobile panoramic round-looking system, which is characterized in that look around wide-angle without thermalization camera lens including above-mentioned.
Wide-angle of looking around of the invention realizes ultra-wide angle using 5 less eyeglasses without thermalization camera lens, and full filed angle is high
In 200 °, structure is simple, has shorter optics overall length, meet the photographing request of wide-angle lens, and control well spuious
Light, easy processing, structure are simple, reduce production cost；The second, four and five lens guarantee camera lens using the use of aspherical lens
Image quality high-definition；First and third lens are glass lens, and second, four, five lens are plastic lens, pass through different spies
The intercombination of the optical material of property, reduces cost in such a way that less glass is combined with plastic lens；Its realization -40-125
The imaging performance that optical system is adaptively adjusted under DEG C different temperatures makes burnt shifting amount control within 10 μm, and camera lens rear end is added
Optical filter filters interference of the infrared band to imaging, effectively improves the image quality of camera lens.
Detailed description of the invention
Fig. 1 looks around structure constitutional diagram of the wide-angle without thermalization camera lens for of the invention；
Fig. 2 is to look around MTF curve figure of the wide-angle without thermalization camera lens in embodiment；
Fig. 3 is to look around distortion curve of the wide-angle without thermalization camera lens in embodiment；
Fig. 4 is to look around defocusing curve figure of the wide-angle without thermalization camera lens at 25 DEG C in embodiment；
Fig. 5 is to look around defocusing curve figure of the wide-angle without thermalization camera lens at -40 DEG C in embodiment；
Fig. 6 is to look around defocusing curve figure of the wide-angle without thermalization camera lens at 125 DEG C in embodiment.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
See Fig. 1, the present invention provides one kind to look around wide-angle without thermalization camera lens, before setting gradually from object space to image space
Lens group 100, diaphragm 300, rear lens group 200, imaging surface 400；In Fig. 1, object space is located at the left side in figure, image aspect
Right side in figure, the left side of Cong Tuzhong is to right side as from object space to image space.
Front lens group 100, front lens group should be set to object space and specifically include that is, apart from the closer side of object:
First lens 110, have negative focal power, and the object plane side S1 of the first lens is convex surface, the image planes side of the first lens
S2 is concave surface；
Second lens 120, have negative focal power, and the object plane side S3 of the second lens is convex surface, the image planes side of the second lens
S4 is concave surface；
The third lens 130, have positive focal power, and the object plane side 35 of the third lens is convex surface, the image planes side of the third lens
S6 is convex surface；
Rear lens group 200 includes setting gradually from object space to image space:
4th lens 210, have negative focal power, and the object plane side S8 of the 4th lens is convex surface, the image planes side of the third lens
S9 is concave surface；
5th lens 220, have positive focal power, and the object plane side S10 of the 5th lens is convex surface, the image planes side of the third lens
S11 is convex surface；
Wherein, the 4th lens 210 and 220 optics of the 5th lens are cementing；
Meanwhile meeting following relationship:
- 6 < f1 < -5, -4 < f2 < -23,2 < f3 < 3, -2 < f4 < -1,0 < f5 < 1,
-4<f1/f<-3,-3<f2/f<-2,1<f3/f<2,-1<f4/f<0,0<f5/f<1
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 to look around focal length value of the wide-angle without thermalization camera 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 glass lens, and the 4th lens 210 are plastic lens, and the 5th lens 220 are plastic lens, close to object side
The material of first lens is set as glass lens, this can be improved and looks around fire prevention of the wide-angle without thermalization camera lens, high temperature resistant, resistance to high humidity
And Anti-scratching ability, it improves and looks around the stability that wide-angle works in harsh environment without thermalization camera lens, farther out apart from object side
The second lens, the 4th lens, the 5th lens be set as plastic lens, it is possible to reduce this looks around gross weight of the wide-angle without thermalization camera lens
Amount.
In the present embodiment, two sides of the first lens 110 are spherical surface, and two sides of the second lens 120 are
Aspherical, two sides of the third lens 130 are spherical surface, and two sides of the 4th lens 210 are aspherical, the 5th lens
220 two sides are aspherical.
It is aspherical to meet following formula:
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, E, F, G are high order aspheric surface system
Number.
Preferably, the first lens also meet the following conditions: 1.7 < Nd1 <, 1.9,40 < Vd1 < 60；Wherein, Nd1
The optical index of one lens, Vd1 are the Abbe constant of the first lens；
Second lens also meet the following conditions: 1.5 < Nd2 <, 1.6,50 < 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: 1.7 < Nd3 <, 1.9,20 < Vd3 < 35；Wherein, Nd3 is the third lens
Optical index, Vd3 are the Abbe constant of the third lens；
4th lens also meet the following conditions: 1.5 < Nd4 <, 1.7,20 < Vd4 < 30；Wherein, Nd4 is the 4th lens
Optical index, Vd4 are the Abbe constant of the 4th lens；
5th lens also meet the following conditions: 1.4 < Nd5 <, 1.6,50 < Vd5 < 60；Wherein, Nd5 is the 5th lens
Optical index, Vd5 are the Abbe constant of the 5th lens.
Performance of the wide-angle without thermalization camera lens is looked around in order to advanced optimize this, this of present embodiment looks around wide-angle without thermalization
Camera lens further includes IR filter plate 500 and protection glass 600.
Specifically, IR filter plate 500 is located at the 5th side of the lens 220 far from object space, and protection glass 600 is located at IR filtering
Side of the piece 500 far from object space, the main function of IR filter plate 500 are the interference for filtering infrared band to imaging, are effectively promoted
The main function of the image quality of camera lens, protection glass 600 is for protecting photosensory assembly.
In the present embodiment, the first lens, the second lens, the third lens, the 4th lens, the 5th lens, IR filter plate, guarantor
It protects glass and meets following condition as shown:
Table 1
When the radius of curvature of diaphragm, IR optical filter and protection glass surface is Infinity in table 1, indicate that this surface is flat
Face.
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, which selects refractive index, the optical glass that Abbe constant is 64.
Wherein, the second lens 120, the 4th lens 210, the 5th lens 220 two sides be aspherical, aspherical system
Number is specifically shown in the following table 2:
Table 2
Optic test is carried out without thermalization camera lens to the wide-angle of looking around in above-described embodiment, Fig. 2 is the ring in above-described embodiment
MTF curve figure depending on wide-angle without thermalization camera lens, abscissa is spatial frequency in Fig. 2, and ordinate is contrast；TS
Diff.Limit be meridian and sagitta of arc direction diffraction limit, TS 0.00 (deg) indicate in 0.00 visual field of image planes meridian and
The diffraction curve in sagitta of arc direction, TS 100.00 (deg) indicate that meridian and the diffraction in sagitta of arc direction are bent in 100.00 visual field of image planes
Line, visible full filed angle reaches 200 here；MTF is at present using a kind of commonplace image quality evaluation index, and referred to as modulation passes
Delivery function.Modulation transfer function: the ratio between the contrast of picture and the contrast of object under certain space frequency.It can reflect different skies
Between frequency, different contrast transmission capacity.Modulation transfer function can be used for indicating the feature of optical system, and MTF is bigger,
The image quality of expression system is better, from Figure 2 it can be seen that looking around good imaging quality of the wide-angle without thermalization camera lens in the present embodiment.
Fig. 3 is to look around distortion curve of the wide-angle without thermalization camera lens in above-described embodiment, and left figure is field curve figure, field
The ordinate of diagram 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 sagitta of arc field
It is bent.Right figure is distortion curve, and the ordinate of distortion figure is field angle, and abscissa is distortion percentage, and field curve display is made
For the current focal plane of visual field coordinate function or as plane is to the distance of paraxial focal plane, it is divided into meridianal curvature of field and Sagittal field curvature.
Distortion belongs to chief ray aberration, the similarity degree of reflection elephant, looks around wide-angle without thermalization camera lens, light in the specific embodiment
Learn smaller, the image definition that distorts.
Fig. 4 is to look around defocusing curve figure of the wide-angle without thermalization camera lens at 25 DEG C in above-described embodiment, and Fig. 5 is above-mentioned reality
Apply in example and look around defocusing curve figure of the wide-angle without thermalization camera lens at -40 DEG C, Fig. 6 be in above-described embodiment look around wide-angle without
Defocusing curve figure of the thermalization camera lens at 125 DEG C, abscissa defocusing amount, in millimeters, ordinate contrast；TS 0.00
(deg) diffraction curve of meridian and sagitta of arc direction in 0.00 visual field of image planes is indicated；What defocusing curve figure indicated is system work
The nearly focal length displacement of the coloured light of different wave length in wave-length coverage.Check different visual fields, within the scope of a certain defocusing amount at characteristic frequency
Transfer function values, by Fig. 4,5,6 as it can be seen that looking around wide-angle ensure that at -40 DEG C of low temperature without thermalization camera lens in the present embodiment
The stable imaging requirements of the optical characteristics in section under to 125 DEG C high temperature, realize and adaptively adjust at -40 DEG C -125 DEG C
The imaging performance of optical system.
The present invention also provides a kind of automobile panoramic round-looking systems, look around wide-angle without thermalization camera lens including above-mentioned.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
Claims (10)
1. one kind looks around wide-angle without thermalization camera lens comprising set gradually from object space to image space: front lens group, diaphragm, with
And rear lens group；It is characterized by: the front lens group includes setting gradually from object space to image space:
First lens have negative focal power, and the object plane side of first lens is convex surface, and the image planes side of first lens is
Concave surface；
Second lens have negative focal power, and the object plane side of second lens is convex surface, and the image planes side of second lens is
Concave surface；
The third lens have positive focal power, 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 rear lens group includes setting gradually from object space to image space:
4th lens have negative focal power, and the object plane side of the 4th lens is convex surface, and the image planes side of the third lens is
Concave surface；
5th lens have positive focal power, and the object plane side of the 5th lens is convex surface, and the image planes side of the third lens is
Convex surface；
Wherein, the 4th lens and the 5th optics of lens are cementing；
Meanwhile meeting following relationship:
- 6 < f1 < -5, -4 < f2 < -23,2 < f3 < 3, -2 < f4 < -1,0 < f5 < 1,
-4<f1/f<-3,-3<f2/f<-2,1<f3/f<2,-1<f4/f<0,0<f5/f<1
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 to look around focal length value of the wide-angle without thermalization camera lens.
2. one kind according to claim 1 looks around wide-angle without thermalization camera lens, it is characterised in that: first lens are glass
Lens, second lens are plastic lens, and the third lens are glass lens, and the 4th lens are plastic lens, institute
Stating the 5th lens is plastic lens.
3. one kind according to claim 1 looks around wide-angle without thermalization camera lens, it is characterised in that: two of first lens
Side is spherical surface, two sides of second lens be it is aspherical, two sides of the third lens are spherical surface,
Two sides of the 4th lens be it is aspherical, two sides of the 5th lens are aspherical.
4. one kind according to claim 1 looks around wide-angle without thermalization camera lens, it is characterised in that: first lens also meet
The following conditions: 1.7 < Nd1 <, 1.9,40 < Vd1 < 60；Wherein, the Nd1 is the optical index of the first lens, and the Vd1 is
The Abbe constant of first lens；
Second lens also meet the following conditions: 1.5 < Nd2 <, 1.6,50 < 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: 1.7 < Nd3 <, 1.9,20 < Vd3 < 35；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: 1.5 < Nd4 <, 1.7,20 < Vd4 < 30；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: 1.4 < Nd5 <, 1.6,50 < Vd5 < 60；Wherein, the Nd5 is the 5th saturating
The optical index of mirror, the Vd5 are the Abbe constant of the 5th lens.
5. one kind according to claim 1 looks around wide-angle without thermalization camera lens, it is characterised in that: further include IR filter plate and
Glass is protected, the IR filter plate is located at side of the 5th lens far from object space, and the protection glass is located at IR filter
Side of the wave plate far from object space.
6. one kind according to claim 1 looks around wide-angle without thermalization camera lens, it is characterised in that: look around wide-angle without thermalization camera lens
Full filed angle FOV be greater than 200 °.
7. one kind according to claim 1 looks around wide-angle without thermalization camera lens, it is characterised in that: look around wide-angle without thermalization camera lens
Jiao Yiliang less than 10 μm.
8. one kind according to claim 1 looks around wide-angle without thermalization camera lens, it is characterised in that: look around wide-angle without thermalization camera lens
Focal power distribute meet: in -40 DEG C to 125 DEG C of high temperature ﹢ of low temperature of section, coke move ± 10 μm within requirement.
9. one kind according to claim 1 looks around wide-angle without thermalization camera lens, it is characterised in that: look around wide-angle without thermalization camera lens
Optics overall length be TTL, it is described to look around wide-angle and meet following relationship without thermalization camera lens: TTL < 13mm.
10. a kind of automobile panoramic round-looking system, it is characterised in that: including claim 1 to the described in any item rings of claim 9
Depending on wide-angle without thermalization camera lens.
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Cited By (2)
| 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 |
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