CN110333591A - A kind of 0.95mm vehicle-mounted high-definition looks around optical system and its imaging method - Google Patents
A kind of 0.95mm vehicle-mounted high-definition looks around optical system and its imaging method Download PDFInfo
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- CN110333591A CN110333591A CN201910664082.2A CN201910664082A CN110333591A CN 110333591 A CN110333591 A CN 110333591A CN 201910664082 A CN201910664082 A CN 201910664082A CN 110333591 A CN110333591 A CN 110333591A
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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
- 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
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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
- G02B13/004—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 four lenses
-
- 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
-
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/006—Filter holders
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/028—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with means for compensating for changes in temperature or for controlling the temperature; thermal stabilisation
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lenses (AREA)
Abstract
The present invention relates to a kind of 0.95mm vehicle-mounted high-definitions to look around optical system, including along light input path successively spaced first spherical lens from front to back, first non-spherical lens, second spherical lens, diaphragm, second non-spherical lens, third non-spherical lens and the 4th non-spherical lens, wherein first spherical lens, first non-spherical lens is bent moon negative lens, second spherical lens is biconvex positive lens, second non-spherical lens, third non-spherical lens contiguity constitutes gluing unit, second non-spherical lens, third non-spherical lens contiguity constitutes gluing unit, 4th non-spherical lens is biconvex positive lens；The invention further relates to the imaging methods that a kind of 0.95mm vehicle-mounted high-definition looks around optical system.Structure of the invention is reasonable, easy to operate, has the characteristics that image quality is clear, temperature drift is low.
Description
Technical field
The present invention relates to a kind of 0.95mm vehicle-mounted high-definitions to look around optical system and its imaging method.
Background technique
Vehicle-mounted camera lens of looking around is widely used in vehicle-mounted DAS (Driver Assistant System), it is desirable that have image quality high definition, imaging angle it is wide,
The features such as small.The many vehicle-mounted camera lenses of looking around in market all use glass to mould design scheme now, are brought with supplying full Glass Design
Image quality is insufficient, bulky disadvantage.With the development of automobile industry, the requirement for miniaturization, high image quality is more into one
Step.It is conventional vehicle-mounted to look around camera lens often there is imaging effects that general, the drift of night luminance shortage, high/low temperature is larger etc. lacks
Point.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of 0.95mm vehicle-mounted high-definitions to look around optical system and its imaging
Method, it is structurally reasonable, easy to operate, have the characteristics that image quality is clear, temperature drift is low.
The technical scheme is that a kind of 0.95mm vehicle-mounted high-definition looks around optical system, including along light input path
Successively spaced first spherical lens, the first non-spherical lens, the second spherical lens, diaphragm, the second aspheric from front to back
Face lens, third non-spherical lens and the 4th non-spherical lens；Wherein first spherical lens, the first non-spherical lens are
Bent moon negative lens, the second spherical lens are biconvex positive lens, and three constitutes the preceding group of camera lens that focal power is negative；Tell the second aspheric
Face lens are double-concave negative lens, and third non-spherical lens is biconvex positive lens；Second non-spherical lens, third are aspherical
Mirror contiguity constitutes gluing unit, and the 4th non-spherical lens is biconvex positive lens, and three constitutes the rear group of camera lens that focal power is positive.
Further, the airspace between first spherical lens and the first non-spherical lens is 1.65mm, described
Airspace between first non-spherical lens and the second spherical lens is 1.5mm, second spherical lens and the second aspheric
Airspace between the lens of face is 0.35mm, the airspace between the third non-spherical lens and the 4th non-spherical lens
For 0.1mm.
Further, the total focal length of optical system is set as f, by the first spherical lens, the first non-spherical lens, second
Spherical lens, the second non-spherical lens, third non-spherical lens and the 4th non-spherical lens focal length be successively set as、、、、、, wherein、、、WithMeet following relationship:
,。
Further, the refractive index of the first spherical lens is set as Nd1, the refractive index of the first non-spherical lens is set
For Nd2, the refractive index of the second spherical lens is set as Nd3, the refractive index of the second non-spherical lens is set as Nd4, by third
The refractive index of non-spherical lens is set as Nd5, the refractive index of the 4th non-spherical lens is set as Nd6The refractive index of each eyeglass is full
Sufficient relationship once: Nd1≥1.7；Nd2≥1.5；Nd3≥1.8；Nd4≥1.6；Nd5≥1.5；Nd6≥1.5。
Further, the Abbe number of the first spherical lens is set as Vd1, by the Abbe number of the first non-spherical lens
It is set as Vd2, the Abbe number of the second spherical lens is set as Vd3, the second non-spherical lens Abbe number is set as Vd4,
The Abbe number of third non-spherical lens is set as Vd5, the refractive index of the 4th non-spherical lens is set as Vd6, each eyeglass
Abbe number meets relationship: Vd1≥45；Vd2≥50；Vd3≤25；Vd4≤30；Vd5≥50；Vd5≥50。
Further, first non-spherical lens, the second non-spherical lens, third non-spherical lens and the 4th aspheric
Face lens are that plastic material is made.
Further, the 4th non-spherical lens rear end is provided with optical filter.
Another technical solution provided by the invention is that a kind of 0.95mm vehicle-mounted high-definition looks around the imaging side of optical system
Method looks around optical system including the 0.95mm vehicle-mounted high-definition: (1) light from front to back successively by the first spherical lens,
First non-spherical lens, the second spherical lens, diaphragm, the second non-spherical lens, third non-spherical lens and the 4th are aspherical
It reaches image planes after lens to be imaged, when light passes through preceding group of camera lens, the negative power of preceding group of camera lens organizes camera lens after capable of correcting
Positive light coke aberration, while preceding group of camera lens by the first non-spherical lens be set to the first spherical lens and the second spherical lens it
Between, when light passes through, the high/low temperature focus drifting of entire optical system can be compensated；(2) first non-spherical lenses, the second aspheric
Face lens, third non-spherical lens, the 4th aspherical four non-spherical lens can correct all senior aberrations and spherical aberration, entirely
Camera lens guarantees camera lens refractive index and the distribution of focal power approximate ratio, and the eyeglass of camera lens and entering for the eyeglass of rear group camera lens are organized before guaranteeing
The harmony of firing angle size, and then the sensibility of camera lens is reduced, while it is that four plastic cement are aspherical that this four are aspherical, image quality
It is good；(3) group camera lens is negative power before, and rear camera lens of organizing is positive light coke, and when light incidence, field of view angle can reach 200 degree,
It can guarantee that picture is clear in the adverse circumstances of different temperatures, so that guaranteeing still can normal use in high and low temperature environment.
Compared with prior art, non-by introducing one group the beneficial effects of the present invention are: present invention design is simple, reasonable
Spherical lens gluing unit corrects spherical aberration, color difference and senior aberration, not only reduces assembly susceptibility, so that yield improves, has
Conducive to large-scale production, image quality is also improved, reaches two mega pixels camera shooting level；And each lens light focus of reasonable computation
A piece of non-spherical lens is added in two panels glass lens to correct this optical system focus under high temperature and low temperature environment and float in degree
It moves, realizes the imaging clearly in -40 DEG C to+85 DEG C of wider temperature range.
To can be more clearly understood the above objects, features and advantages of the present invention, with reference to the accompanying drawing to the present invention
Specific embodiment elaborate.
Detailed description of the invention
Fig. 1 is the optical texture schematic diagram of the embodiment of the present invention；
Fig. 2 is the visible light MTF curve figure of the embodiment of the present invention；
Fig. 3 is -40 DEG C of MTF defocusing curves of high temperature of the embodiment of the present invention；
Fig. 4 is+85 DEG C of MTF defocusing curves of high temperature of the embodiment of the present invention；
In figure: organizing camera lens before 100-；The first spherical lens of 110-；The first non-spherical lens of 120-；The second spherical lens of 130-；
Camera lens is organized after 200-；The second non-spherical lens of 210-；220- third non-spherical lens；The 4th non-spherical lens of 230-；300- light
Door screen；400- optical filter.
Specific embodiment
As shown in Figure 1, a kind of 0.95mm vehicle-mounted high-definition looks around optical system, including along light input path from front to back according to
The first spherical lens, the first non-spherical lens, the second spherical lens, diaphragm, the second non-spherical lens, third of minor tick setting
Non-spherical lens and the 4th non-spherical lens；Wherein first spherical lens, the first non-spherical lens are bent moon negative lens,
Second spherical lens is biconvex positive lens, and three constitutes the preceding group of camera lens that focal power is negative；Tell that the second non-spherical lens is double
Recessed negative lens, third non-spherical lens are biconvex positive lens；Second non-spherical lens, third non-spherical lens contiguity are constituted
Gluing unit, the 4th non-spherical lens are biconvex positive lens, and three constitutes the rear group of camera lens that focal power is positive.
In the present embodiment, the airspace between first spherical lens and the first non-spherical lens is 1.65mm, institute
Stating airspace between the first non-spherical lens and the second spherical lens is 1.5mm, second spherical lens and second non-
Airspace between spherical lens is 0.35mm, between the air between the third non-spherical lens and the 4th non-spherical lens
It is divided into 0.1mm.
In the present embodiment, the total focal length of optical system is set as f, by the first spherical lens, the first non-spherical lens,
Two spherical lenses, the second non-spherical lens, third non-spherical lens and the 4th non-spherical lens focal length be successively set as、、、、、, wherein、、、WithMeet following relationship:
,。
In the present embodiment, the refractive index of the first spherical lens is set as Nd1, the refractive index of the first non-spherical lens is set
It is set to Nd2, the refractive index of the second spherical lens is set as Nd3, the refractive index of the second non-spherical lens is set as Nd4, by
The refractive index of three non-spherical lenses is set as Nd5, the refractive index of the 4th non-spherical lens is set as Nd6The refractive index of each eyeglass
Meet relationship: Nd1≥1.7；Nd2≥1.5；Nd3≥1.8；Nd4≥1.6；Nd5≥1.5；Nd6≥1.5。
In the present embodiment, the Abbe number of the first spherical lens is set as Vd1, by the Abbe system of the first non-spherical lens
Number is set as Vd2, the Abbe number of the second spherical lens is set as Vd3, the second non-spherical lens Abbe number is set as
Vd4, the Abbe number of third non-spherical lens is set as Vd5, the refractive index of the 4th non-spherical lens is set as Vd6, each mirror
The Abbe number of piece meets relationship: Vd1≥45；Vd2≥50；Vd3≤25；Vd4≤30；Vd5≥50；Vd5≥50。
In the present embodiment, first non-spherical lens, the second non-spherical lens, third non-spherical lens and the 4th are non-
Spherical lens is that plastic material is made.
In the present embodiment, the 4th non-spherical lens rear end is provided with optical filter.
Table 1, specific lens parameters such as following table
The present embodiment uses six-element lens as an example, by each power of lens of reasonable distribution, face type, each lens
Spacing etc. on axis between heart thickness and each lens effectively expands the field angle of camera lens, shortens camera lens total length, guarantees camera lens
Small distortion and high illumination；All kinds of aberrations are corrected simultaneously, improve the resolution and image quality of camera lens.Each aspherical face type Z by
Following formula limits:
Wherein,Highly it is being along optical axis direction to be asphericalPosition when, away from aspheric vertex of surface apart from rise；It is non-
The paraxial curvature of spherical surface,(that is, paraxial curvatureFor upper 1 mean curvature radius of tableInverse)；For the constant of the cone；
A, B, C, D, E are high-order coefficient.The following table 2 shows the constant of the cone of available aspherical lens surface each in this present embodiment
K and high-order coefficient A, B, C, D, E.
Each non-spherical lens parameter of table 2
In the present embodiment, the technical indicator that this optical system is realized is as follows:
(1) focal length: EFFL=0.95mm；(2) aperture F=2.0；(3) field angle: 2w >=200 °；(4) optical distortion: < -120%；
(5) imaging circular diameter is greater than φ 4；(6) service band: 420~700nm；(7) optics overall length TTL≤12.9mm, optics rear cut-off distance
BFL≥2mm；(8) camera lens is suitable for 2,000,000 pixel CCD or cmos camera.
A kind of 0.95mm vehicle-mounted high-definition looks around the imaging method of optical system, looks around including the 0.95mm vehicle-mounted high-definition
Optical system: (1) light successively passes through the first spherical lens, the first non-spherical lens, the second spherical lens, light from front to back
It reaches image planes after door screen, the second non-spherical lens, third non-spherical lens and the 4th non-spherical lens to be imaged, when light passes through
Before crossing when group camera lens, the negative power of preceding group of camera lens organizes the positive light coke aberration of camera lens after capable of correcting, while preceding group of camera lens is by the
One non-spherical lens is set between the first spherical lens and the second spherical lens, when light passes through, can compensate entire optics
The high/low temperature focus drifting of system；(2) first non-spherical lenses, the second non-spherical lens, third non-spherical lens, the 4th it is non-
Four non-spherical lenses of spherical surface can correct all senior aberrations and spherical aberration, and entire camera lens guarantees that camera lens refractive index and focal power are approximate
Pro rate, the harmony of the incidence angle size of the eyeglass of the eyeglass of group camera lens and rear group camera lens before guaranteeing, and then reduce camera lens
Sensibility, while it is that four plastic cement are aspherical that this four are aspherical, and image quality is good；(3) group camera lens is negative power before, organizes mirror afterwards
Head is positive light coke, and when light incidence, field of view angle can reach 200 degree, can guarantee picture in the adverse circumstances of different temperatures
Clearly, so that guarantee still can normal use in high and low temperature environment.
As seen from Figure 2, the optical system is good in the MTF performance of visible light wave range, can achieve 2,000,000 high definitions
Resolving power demand.Fig. 3 and Fig. 4 is -40 DEG C of low temperature of the optical system and the MTF defocusing curve of+85 DEG C of high temperature, low temperature in figure
Defocusing amount be 14 μm, the defocusing amount of high temperature is 6 μm, and MTF decays very little, fully meets high/low temperature image definition.
Aforesaid operations process and software and hardware configuration are only used as presently preferred embodiments of the present invention, are not intended to limit the present invention
The scope of the patents, it is all using equivalents made by description of the invention and accompanying drawing content, be applied directly or indirectly in phase
Technical field is closed, is included within the scope of the present invention.
Claims (8)
1. a kind of 0.95mm vehicle-mounted high-definition looks around optical system, it is characterised in that: including along light input path from front to back according to
The first spherical lens, the first non-spherical lens, the second spherical lens, diaphragm, the second non-spherical lens, third of minor tick setting
Non-spherical lens and the 4th non-spherical lens；
Wherein first spherical lens, the first non-spherical lens are bent moon negative lens, and the second spherical lens is biconvex positive lens,
Three constitutes the preceding group of camera lens that focal power is negative；
Tell that the second non-spherical lens is double-concave negative lens, third non-spherical lens is biconvex positive lens；
Second non-spherical lens, third non-spherical lens contiguity constitute gluing unit, and the 4th non-spherical lens is that biconvex is just saturating
Mirror, three constitute the rear group of camera lens that focal power is positive.
2. a kind of 0.95mm vehicle-mounted high-definition according to claim 1 looks around optical system, it is characterised in that: first ball
Airspace between face lens and the first non-spherical lens is 1.65mm, first non-spherical lens and the second spherical lens
Between airspace be 1.5mm, airspace between second spherical lens and the second non-spherical lens is 0.35mm,
Airspace between the third non-spherical lens and the 4th non-spherical lens is 0.1mm.
3. a kind of 0.95mm vehicle-mounted high-definition according to claim 2 looks around optical system, it is characterised in that: by optical system
Total focal length be set as f, by the first spherical lens, the first non-spherical lens, the second spherical lens, the second non-spherical lens,
The focal length of three non-spherical lenses and the 4th non-spherical lens is successively set as、、、、、, wherein、、、WithMeet following relationship:
,。
4. a kind of 0.95mm vehicle-mounted high-definition according to claim 3 looks around optical system, it is characterised in that: by the first spherical surface
The refractive index of lens is set as Nd1, the refractive index of the first non-spherical lens is set as Nd2, by the refractive index of the second spherical lens
It is set as Nd3, the refractive index of the second non-spherical lens is set as Nd4, the refractive index of third non-spherical lens is set as Nd5,
The refractive index of 4th non-spherical lens is set as Nd6The refractive index of each eyeglass meets relationship: Nd1≥1.7；Nd2≥1.5；
Nd3≥1.8；Nd4≥1.6；Nd5≥1.5；Nd6≥1.5。
5. a kind of 0.95mm vehicle-mounted high-definition according to claim 4 looks around optical system, it is characterised in that: by the first spherical surface
The Abbe number of lens is set as Vd1, the Abbe number of the first non-spherical lens is set as Vd2, by the second spherical lens Ah
Shellfish coefficient is set as Vd3, the second non-spherical lens Abbe number is set as Vd4, the Abbe number of third non-spherical lens is set
It is set to Vd5, the refractive index of the 4th non-spherical lens is set as Vd6, the Abbe number of each eyeglass meets relationship: Vd1≥45；
Vd2≥50；Vd3≤25；Vd4≤30；Vd5≥50；Vd5≥50。
6. a kind of 0.95mm vehicle-mounted high-definition according to claim 5 looks around optical system, it is characterised in that: described first is non-
Spherical lens, the second non-spherical lens, third non-spherical lens and the 4th non-spherical lens are that plastic material is made.
7. a kind of 0.95mm vehicle-mounted high-definition according to claim 6 looks around optical system, it is characterised in that: in the 4th aspheric
Face lens rear is provided with optical filter.
8. a kind of 0.95mm vehicle-mounted high-definition looks around the imaging method of optical system, including 0.95mm vehicle as claimed in claim 7
It carries high definition and looks around optical system, it is characterised in that: (1) light is from front to back successively by the first spherical lens, first aspherical
It is reached after lens, the second spherical lens, diaphragm, the second non-spherical lens, third non-spherical lens and the 4th non-spherical lens
Image planes are imaged, and when light passes through preceding group of camera lens, the negative power of preceding group of camera lens organizes the positive light coke of camera lens after capable of correcting
Aberration, while the first non-spherical lens is set between the first spherical lens and the second spherical lens by preceding group of camera lens, works as light
When passing through, the high/low temperature focus drifting of entire optical system can be compensated；(2) first non-spherical lenses, the second non-spherical lens,
Three non-spherical lenses, the 4th aspherical four non-spherical lens can correct all senior aberrations and spherical aberration, and entire camera lens guarantees
Camera lens refractive index and the distribution of focal power approximate ratio, the incidence angle size of the eyeglass of the eyeglass of group camera lens and rear group camera lens before guaranteeing
Harmony, and then reduce the sensibility of camera lens, while it is that four plastic cement are aspherical that this four are aspherical, and image quality is good；(3) group before
Camera lens is negative power, and rear camera lens of organizing is positive light coke, and when light incidence, field of view angle can reach 200 degree, in different temperatures
Adverse circumstances can guarantee that picture is clear, so that guaranteeing still can normal use in high and low temperature environment.
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| CN201910664082.2A CN110333591B (en) | 2019-07-23 | 2019-07-23 | 0.95mm vehicle-mounted high-definition looking-around optical system and imaging method thereof |
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| CN201910664082.2A CN110333591B (en) | 2019-07-23 | 2019-07-23 | 0.95mm vehicle-mounted high-definition looking-around optical system and imaging method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112285884A (en) * | 2020-10-28 | 2021-01-29 | 福建福光天瞳光学有限公司 | 1.14mm ultra-wide angle optical system and imaging method thereof |
| CN114942511A (en) * | 2022-05-05 | 2022-08-26 | 福建福光天瞳光学有限公司 | Large-view-range and large-imaging-area optical lens and imaging method thereof |
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| CN108957705A (en) * | 2018-09-05 | 2018-12-07 | 利达光电股份有限公司 | A kind of no thermalization ultra-wide angle high definition on-vehicle lens |
| CN210742595U (en) * | 2019-07-23 | 2020-06-12 | 福建福光天瞳光学有限公司 | 0.95mm vehicle-mounted high-definition all-round-looking optical system |
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| JP2002072085A (en) * | 2000-09-01 | 2002-03-12 | Matsushita Electric Ind Co Ltd | Super-wide-angle lens |
| CN101359087A (en) * | 2007-08-02 | 2009-02-04 | 鸿富锦精密工业（深圳）有限公司 | Wide-angle lens and vehicle apparatus using the wide-angle lens |
| CN108957705A (en) * | 2018-09-05 | 2018-12-07 | 利达光电股份有限公司 | A kind of no thermalization ultra-wide angle high definition on-vehicle lens |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112285884A (en) * | 2020-10-28 | 2021-01-29 | 福建福光天瞳光学有限公司 | 1.14mm ultra-wide angle optical system and imaging method thereof |
| CN112285884B (en) * | 2020-10-28 | 2022-05-27 | 福建福光天瞳光学有限公司 | 1.14mm ultra-wide angle optical system and imaging method thereof |
| CN114942511A (en) * | 2022-05-05 | 2022-08-26 | 福建福光天瞳光学有限公司 | Large-view-range and large-imaging-area optical lens and imaging method thereof |
| CN114942511B (en) * | 2022-05-05 | 2024-05-10 | 福建福光天瞳光学有限公司 | Large-view-range large-imaging-area optical lens and imaging method thereof |
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| CN110333591B (en) | 2023-08-15 |
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