CN206557463U - Wide-angle uses on-vehicle lens - Google Patents
Wide-angle uses on-vehicle lens Download PDFInfo
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- CN206557463U CN206557463U CN201720052886.3U CN201720052886U CN206557463U CN 206557463 U CN206557463 U CN 206557463U CN 201720052886 U CN201720052886 U CN 201720052886U CN 206557463 U CN206557463 U CN 206557463U
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Abstract
The utility model is related to a kind of wide-angle and uses on-vehicle lens, including the first lens element to the 6th lens element set gradually since object space, the first lens element is with negative power and in the crescent lens of the focal length 7.69 to object space side evagination to 8.50mm；Second lens element is biconcave lens of the focal length 4.31 with negative power to 4.77mm；3rd lens element is biconvex lens of the focal length 4.03 with positive light coke to 4.45mm；4th lens element is biconvex lens of the focal length 3.76 with positive light coke to 4.16mm；5th lens element is with negative power and in the crescent lens of the focal length 5.20 to image space side evagination to 5.74mm；6th lens element is biconvex lens of the focal length 8.65 with positive light coke to 9.56mm；4th lens element and the 5th lens element contiguity constitute cemented doublet together.Jiao can possess night vision function, advantage with low cost after the utility model need not be compensated by optical filter.
Description
Technical field
The utility model is related to a kind of wide-angle and uses on-vehicle lens, applies in on-vehicle lens field.
Background technology
Have benefited from the high speed development of automobile assistant driving system in recent years, the extensive use that camera lens is obtained on automobile.Its
Include vehicle-mounted reversing visible system, drive recorder, automatic parking and panoramic parking system, road Pathfinding system etc..Camera lens
Sensor plays a part of in DAS (Driver Assistant System) equivalent to eyes, for other sensors, and lens sensors are most
To approach the mode of operation that human eye obtains ambient condition information, it is advantageous that：1. lens technology is ripe, cost is relatively low；2. can
To obtain information the most comprehensive by less data volume.
On-vehicle lens have a wide range of applications space on automobile.Current application of the camera lens on automobile mainly has：1. before
Visor head, is typically mounted at shield glass top, be mainly used in detect vehicle front environment, identification road, vehicle,
Pedestrian etc., is widely used in automatic cruising, preceding hits the functions such as early warning, driving recording；2. backsight camera lens, is typically mounted at car tail
Portion, for detecting rear view of vehicle environment, applied to vehicle-mounted reversing visible system；3. looking around camera lens, typically at least include four mirrors
Head, is separately mounted to the front, rear, left and right side of vehicle, realizes 360 ° of environment sensings, and being parked applied to automatic parking and panorama is
System.
Unique need to on-vehicle lens mainly has：1. the horizontal field of view angle of on-vehicle lens is sufficiently large, row is just avoided that
Vision dead zone during car；2. on-vehicle lens are it is necessary to have night vision function, to ensure that night can normally use.Further, since
On-vehicle lens cause its technical matters difficulty big, different from general camera lens the high request of reliability.On-vehicle lens continuously work
Time is longer and local environment is complex, therefore also requires that on-vehicle lens have the functions such as waterproof, antidetonation, high temperature resistant.
Although existing wide-angle high definition on-vehicle lens disclosure satisfy that basic flood looks squarely rink corner and realizes that vehicle mounted surveillance is used
Primary demand, such as vehicle-mounted mirror of wide-angle of application number 201510556596.8,200910099703.3,201620158537.5
Head, but it still has many defects, and complex process need to be such as caused using aspherical lens and production cost is high, do not possess night vision
Function, image quality be not good and does not possess waterproof, antidetonation, high temperature resistant function etc..Therefore provide it is a kind of without by optical filter come
It is burnt after compensation to possess that night vision function, image quality are good, have waterproof concurrently, antidetonation, the wide-angle of high temperature resistant function use vehicle-mounted mirror
Head oneself turn into when business urgently.
Utility model content
In order to overcome existing on-vehicle lens to need, increase optical filter could realize night vision function come Jiao after compensating and cost is high
Shortcoming, the utility model provides a kind of wide-angle and uses on-vehicle lens, can have with Jiao after without be compensated by optical filter
Standby night vision function, advantage with low cost.
The technical solution of the utility model is as follows：
A kind of wide-angle uses on-vehicle lens, including set gradually since object space the first lens element, the second lens cells
Part, the 3rd lens element, the 4th lens element, the 5th lens element and the 6th lens element, wherein：
First lens element be with negative focal power and in object space side evagination focal length be -7.69 to -
8.50mm crescent lens；
Second lens element is the biconcave lens that the focal length with negative focal power is -4.31 to -4.77mm；
3rd lens element is the biconvex lens that the focal length with positive focal power is 4.03 to 4.45mm；
4th lens element is the biconvex lens that the focal length with positive focal power is 3.76 to 4.16mm；
5th lens element be with negative focal power and in image space side evagination focal length be -5.20 to
5.74mm crescent lens；
6th lens element is the biconvex lens that the focal length with positive focal power is 8.65 to 9.56mm；
4th lens element and the 5th the lens element contiguity constitutes cemented doublet together.
The wide-angle of the application uses on-vehicle lens and uses double gauss structure, and this structure has preferably correction aberration energy
Power.First lens element design largely adds the angle of visual field of camera lens into meniscus lens, to the collection energy of rim ray
Power is also greatly promoted.Second lens element and the 3rd lens element are set to monolithic eyeglass, can balance system well
The sensitiveness of each units match in internal focal power, reduction system.The wide-angle uses on-vehicle lens and uses six chip lens
Element, simple in construction and practicality, the angle of visual field is big, as backsight camera lens and can look around camera lens and uses.And coordinate each lens element to set
The focal length set, it is 450-850nm, maximum infrared defocusing amount that the wide-angle, which uses on-vehicle lens and is applicable spectral region,<0.01mm, because
This need not be by the optical filter of different-thickness difference come Jiao after compensating in the spectral region, and itself and infrared light compensating lamp are arranged in pairs or groups
Afterwards, i.e., optical filter need not be set up i.e. achievable day and night confocal, with regard to the imaging effect on daytime can be obtained in pitch-dark environment.It is applicable
Property is strong.Further, since whole spheric glasses, the multi-purpose on-vehicle lens needs part of more existing wide-angle is used for aspherical lens,
Its lens element is more readily processed, and manufacturing cost is relatively low.
The refractive index Nd of first lens element is 1.5-1.6, and Abbe number Vd is 39-40；Second lens cells
The refractive index Nd of part is 1.5-1.6, and Abbe number Vd is 47-48；The refractive index Nd of 3rd lens element is 2.0-2.1,
Abbe number Vd is 28-29；The refractive index Nd of 4th lens element is 1.5-1.6, and Abbe number Vd is 68-69；It is described
The refractive index Nd of 5th lens element is 1.9-2.0, and Abbe number Vd is 17-18；The refractive index Nd of 6th lens element
For 1.8-1.9, Abbe number Vd is 46-47.
It is a 3MP (resolution ratio), the camera lens of wide-angle that the wide-angle of the application, which uses on-vehicle lens, focal length be 3.0mm ±
10%, the system monitoring angle of visual field can reach 160 ° ± 10%, and relative aperture D/f ' is 1:2 ± 10%, it is applicable the picture of video camera
Face ＞ 1/3inch, meet the video camera induction chip target surface size generally used now.The camera lens can be in the less situation of focal length
Under allow the angle of visual field reach wide-angle even ultra-wide angle, and when realizing its night vision function can by replace the material of lens element come
Reduce infrared defocusing amount.Each lens element of above-mentioned parameter is used cooperatively to be greatly promoted again on the basis of night vision function is realized
Image quality so that mtf value (mtf value embodies the image quality height of camera lens) in 160lp/mm ＞ within 0.7 visual field
0.3, full filed mtf value ＞ 0.18 in 160lp/mm.
The wide-angle uses the diaphragm that on-vehicle lens also include being arranged between the 3rd lens element and the 4th lens element
Element.
Aperture member is used to control imaging size.
The wide-angle, which uses on-vehicle lens, also to be included being used for the body tube of each lens element of clamp fixation, is set in body tube
Close to the side end of object space one for coordinating fixed each lens element locations with body tube and preventing each lens element from body tube
The preceding trim ring of middle abjection, the spacer ring A for keeping second lens element and the 3rd lens element relative distance, inner chamber middle part
Aperture member is set for card and for keeping the 3rd lens element and the spacer ring B and use of the 4th lens element relative distance
In the spacer ring C for keeping the 5th lens element and the 6th lens element relative distance.
Spacer ring A, spacer ring B and spacer ring C maintain the relative distance of each lens element, and are matched somebody with somebody by body tube and preceding trim ring
Each lens element is secured firmly to relative position by conjunction, prevents its positioning.
The air gap between first lens element and the second lens element is 3.2-3.3mm, the second lens element
The air gap between the 3rd lens element is 1.3-1.4mm, the air between the 3rd lens element and the 4th lens element
Gap is 2.6-2.7mm, and the air gap between the 5th lens element and the 6th lens element is 0.5-0.6mm.
The air gap refers to the ultimate range of two neighboring center of lens.Pass through above-mentioned each lens element relative distance position
Preferred restriction, further improve imaging effect.
First lens element, the second lens element, the 3rd lens element, the 4th lens element, the 5th lens element,
6th lens element uses glass material, and the aperture member, body tube and preceding trim ring use metal material.
On-vehicle lens also have external on-vehicle lens (reverse image, side shadow except built-in on-vehicle lens (drive recorder)
Picture).In summer and the two seasons in winter, the surface temperature of some areas car is minimum to can reach -20 DEG C, can reach 60
℃.Each lens element that the wide-angle of the application uses on-vehicle lens uses glass material entirely, and image quality is apparent, and diaphragm member
Part, body tube and preceding trim ring use metal material, coordinate close with each lens element, not only Stability Analysis of Structures, with higher
The thermal coefficient of expansion of each part is smaller under anti seismic efficiency, and high temperature, and influence of the high temperature to camera lens is smaller so that the wide-angle is more
With on-vehicle lens can at -20-80 DEG C normal work, the imaging in the temperature range is substantially undistorted, with it is wider array of should
Use scope.
First lens element, the second lens element, the 3rd lens element, the 4th lens element, the 5th lens element,
The surface of 6th lens element is all covered with for ensureing that light of each lens element in 480-850nm spectral range is effectively saturating
Cross rate>99.5% multicoating.
Each lens element is plated after above-mentioned film, and imaging effect becomes apparent from.
The spacer ring A, spacer ring B and spacer ring C be inner chamber two ends bore it is narrow compared with inner chamber stage casing bore can be used for eliminate miscellaneous
The buckle structure of astigmatism.
Each spacer ring uses buckle structure, can effectively shading, shield a large amount of veiling glares.
The axially facing surface of first lens element and body tube is provided with prevents for lifting the multi-purpose on-vehicle lens of wide-angle
The O-shaped rubber ring of aqueous energy.
The use environment of external on-vehicle lens is relatively complicated, is frequently encountered that comparison is moist or even direct contact water
Environment, accordingly, it would be desirable to carry out waterproof measure in structure.The wide-angle uses on-vehicle lens in mechanical structure by setting O
Type rubber ring so that anti-watertight is realized in the contact between body tube of the first lens element by way of extruding O-shaped rubber ring
Envelope, improves the water resistance that wide-angle uses on-vehicle lens.
The wide-angle is used to be bonded in video camera front fuselage, described video camera fuselage when on-vehicle lens are used and is provided with
Video camera induction chip, wide-angle is used after on-vehicle lens and the engagement of video camera fuselage, and it is many that the video camera induction chip is located at wide-angle
With the dead astern of on-vehicle lens, the endface position that the nearly wide-angle of video camera induction chip uses on-vehicle lens is provided with for avoiding shooting
Machine induction chip directly contacts the induction chip to be played a protective role to video camera induction chip with the multi-purpose on-vehicle lens of wide-angle
Protect window.
By setting induction chip to protect window to realize effective protection to video camera induction chip.
The spacer ring A, spacer ring B and spacer ring C dimension control are in ± 0.01mm；The chi of the body tube and preceding trim ring
Very little precision is controlled in ± 0.02mm, and axiality is controlled ± 0.02.
Above-mentioned precision controlling can further lift and ensure the imaging effect that the wide-angle uses on-vehicle lens.
The contact surface of the preceding trim ring and body tube and the end of external contact, which are provided with, glues both for pouring into glue
The point glue groove of knot together.
The setting of the glue groove coordinates above-mentioned O-shaped rubber ring, plays a part of dual waterproof.
Provided with the screw thread being connected with video camera fuselage, (i.e. M12 connects lateral wall of the body tube close to image space side
Mouthful).
The setting of the M12 interfaces causes the wide-angle to use on-vehicle lens and can be suitably used for more vehicle-mounted pick-up fields.
Body tube is provided with the optical filtering film trap for being used for placing optical filter close to the end of image space side.
The setting of optical filtering film trap causes wide-angle to use on-vehicle lens and can increase optical filter, and rear Jiao is entered according to specific demand
The further condition of row, meets more real requirements.
Wear-resisting waterproof membrane is also covered with outside the plated film.
Wear-resisting waterproof membrane can lift the wearability and water proofing property that wide-angle uses on-vehicle lens.
The glass material of each lens element is environmentally friendly glass material.
Compared with prior art, the present utility model application has advantages below：
1) wide-angle of the application uses on-vehicle lens in 450-850nm spectral region, maximum infrared defocusing amount<
0.01mm, need not can simultaneously have concurrently sufficiently large in the spectral region by the optical filter of different-thickness difference come Jiao after compensating
Horizontal field of view angle and night vision function, and use cheap spheric glass, not only reduce cost and easy to process；
2) set by the Optimal Parameters of each lens element, effectively improve image quality；
3) high-low temperature resistant, is applicable external temperature environment extensively, is imaged in the range of -20-80 DEG C substantially undistorted；
4) dual water-proof function and shockproof.
Brief description of the drawings
Fig. 1 is the lens optical schematic cross-sectional view that wide-angle described in the utility model uses on-vehicle lens；
Fig. 2 is the assembling structure section view signal that wide-angle described in the utility model uses on-vehicle lens and video camera fuselage
Figure；
Fig. 3 is that wide-angle described in the utility model uses camera lens point range figure of the on-vehicle lens under visible ray (daytime) environment
(Spt)；
Fig. 4 is that wide-angle described in the utility model uses transmission function song of the on-vehicle lens under visible ray (daytime) environment
Line (Mtf)；
Fig. 5 is that wide-angle described in the utility model uses camera lens point range figure of the on-vehicle lens under infrared light (night) environment
(Spt)；
Fig. 6 is that wide-angle described in the utility model uses transmission function song of the on-vehicle lens under infrared light (night) environment
Line (Mtf)；
Fig. 7 is that wide-angle described in the utility model uses camera lens point range figure (Spt) of the on-vehicle lens under -20 DEG C of environment；
Fig. 8 is that wide-angle described in the utility model uses transfer curve of the on-vehicle lens under -20 DEG C of environment
(Mtf)；
Fig. 9 is that wide-angle described in the utility model uses camera lens point range figure (Spt) of the on-vehicle lens under 20 DEG C of environment；
Figure 10 is that wide-angle described in the utility model uses transfer curve of the on-vehicle lens under 20 DEG C of environment
(Mtf)；
Figure 11 is that wide-angle described in the utility model uses camera lens point range figure (Spt) of the on-vehicle lens under 80 DEG C of environment；
Figure 12 is that wide-angle described in the utility model uses transfer curve of the on-vehicle lens under 80 DEG C of environment
(Mtf)。
Label declaration：
First lens element 1, the second lens element 2, the 3rd lens element 3, the 4th lens element 4, the 5th lens element
5th, the 6th lens element 6, aperture member 7, body tube 8, preceding trim ring 9, spacer ring A10, spacer ring B11, spacer ring C12, O-shaped rubber ring
13rd, video camera fuselage 14, point glue groove 15, screw thread 81, optical filtering film trap 82, video camera induction chip 141, induction chip protection window
142。
Embodiment
Raw material information：
First lens element, the second lens element, the 3rd lens element, the 4th lens element, the 5th lens element, the 6th
Lens element：Chengdu light glass storehouse.
The technical solution of the utility model is described in detail with reference to Figure of description 1-12.
As shown in Figure 1-2, a kind of wide-angle described in the utility model uses on-vehicle lens and includes setting successively since object space
The first lens element 1, the second lens element 2, the 3rd lens element 3, the 4th lens element 4, the 5th lens element 5 and put
Six lens elements 6, wherein：
First lens element 1 be with negative focal power and in object space side evagination focal length be -7.69 to -
8.50mm crescent lens；
Second lens element 2 is the biconcave lens that the focal length with negative focal power is -4.31 to -4.77mm；
3rd lens element 3 is the biconvex lens that the focal length with positive focal power is 4.03 to 4.45mm；
4th lens element 4 is the biconvex lens that the focal length with positive focal power is 3.76 to 4.16mm；
5th lens element 5 be with negative focal power and in image space side evagination focal length be -5.20 to
5.74mm crescent lens；
6th lens element 6 is the biconvex lens that the focal length with positive focal power is 8.65 to 9.56mm；
4th lens element 4 constitutes cemented doublet together with touching with the 5th lens element 5.
The refractive index Nd of first lens element 1 is 1.5-1.6, and Abbe number Vd is 39-40；Second lens cells
The refractive index Nd of part 2 is 1.5-1.6, and Abbe number Vd is 47-48；The refractive index Nd of 3rd lens element 3 is 2.0-
2.1, Abbe number Vd are 28-29；The refractive index Nd of 4th lens element 4 is 1.5-1.6, and Abbe number Vd is 68-69；
The refractive index Nd of 5th lens element 5 is 1.9-2.0, and Abbe number Vd is 17-18；The folding of 6th lens element 6
Rate Nd is penetrated for 1.8-1.9, Abbe number Vd is 46-47.
The wide-angle uses the light that on-vehicle lens also include being arranged between the 3rd lens element 3 and the 4th lens element 4
Late element 7.
The wide-angle, which uses on-vehicle lens, also to be included being used for the body tube 8 of each lens element of clamp fixation, is set in primary mirror
Cylinder 8 is close to the side end of object space one for coordinating fixed each lens element locations with body tube 8 and preventing each lens element from master
The preceding trim ring 9 deviate from lens barrel 8, the spacer ring for keeping second lens element 2 and the relative distance of the 3rd lens element 3
A10, be used in the middle part of inner chamber card set aperture member 7 and for keep the 3rd lens element 3 and the 4th lens element 4 with respect to away from
From spacer ring B11 and spacer ring C12 for keeping the 5th lens element 5 and the relative distance of the 6th lens element 6.
The air gap between the lens element 2 of first lens element 1 and second is 3.2-3.3mm, the second lens cells
The air gap between the lens element 3 of part 2 and the 3rd is 1.3-1.4mm, between the 3rd lens element 3 and the 4th lens element 4
The air gap be 2.6-2.7mm, the air gap between the 5th lens element 5 and the 6th lens element 6 is 0.5-0.6mm.
First lens element 1, the second lens element 2, the 3rd lens element 3, the 4th lens element 4, the 5th lens
Element 5, the 6th lens element 6 use glass material, and the aperture member 7, body tube 8 and preceding trim ring 9 use metal material
Matter.
First lens element 1, the second lens element 2, the 3rd lens element 3, the 4th lens element 4, the 5th lens
Element 5, the surface of the 6th lens element 6 are all covered with for ensureing each lens element in 480-850nm spectral range
Light effective transmissivity>99.5% multicoating.
The spacer ring A10, spacer ring B11 and spacer ring C12, which are that inner chamber two ends bore is narrow compared with inner chamber stage casing bore, to be used for
Eliminate the buckle structure of veiling glare.
The axially facing surface of first lens element 1 and body tube 8, which is provided with, to be used to lift the multi-purpose on-vehicle lens of wide-angle
The O-shaped rubber ring 13 of water resistance.
The wide-angle is used when on-vehicle lens are used and is bonded in the front end of video camera fuselage 14, described video camera fuselage 14
Provided with video camera induction chip 141, wide-angle is used after on-vehicle lens and the engagement of video camera fuselage 14, the video camera induction chip
141 are located at the dead astern that wide-angle uses on-vehicle lens, and the nearly wide-angle of video camera induction chip 141 uses the endface position of on-vehicle lens
Provided with for avoiding video camera induction chip 141 from directly being contacted with the multi-purpose on-vehicle lens of wide-angle with to video camera induction chip 141
The induction chip protection window 142 played a protective role.
The spacer ring A10, spacer ring B11 and spacer ring C12 dimension control are in ± 0.01mm；The body tube 8 is with before
The dimensional accuracy of trim ring 9 is controlled in ± 0.02mm, and axiality is controlled ± 0.02.
Above-mentioned precision controlling can further lift and ensure the imaging effect that the wide-angle uses on-vehicle lens.
The preceding trim ring 9 is provided with the contact surface of body tube 8 and the end of external contact incite somebody to action both for pouring into glue
The point glue groove 15 being bonded together.
The setting of the glue groove 15 coordinates above-mentioned O-shaped rubber ring 13, plays a part of dual waterproof.
Lateral wall of the body tube 8 close to image space side is provided with the screw thread 81 being connected with video camera fuselage 14, i.e. M12
Interface.
The setting of the M12 interfaces causes the wide-angle to use on-vehicle lens and can be suitably used for more vehicle-mounted pick-up fields.
Body tube 8 is provided with the optical filtering film trap 82 for being used for placing optical filter close to the end of image space side.
The setting of optical filtering film trap 82 causes wide-angle to use on-vehicle lens and can increase optical filter, according to specific demand to rear Jiao
Further condition is carried out, more real requirements are met.
Wear-resisting waterproof membrane is also covered with outside the plated film.
Wear-resisting waterproof membrane can lift the wearability and water proofing property that wide-angle uses on-vehicle lens.
The glass material of each lens element is environmentally friendly glass material.
Embodiment 1
A kind of wide-angle uses on-vehicle lens, its first lens element 1, the second lens element 2, the 3rd lens element 3, diaphragm
Element 7, the 4th lens element 4, the relative distance and relevant parameter such as table of the 5th lens element 5 and the 6th lens element 6
Shown in one.
Table one
Experimental data
First, camera lens point range figure (Spt) and transfer curve (Mtf) under visible ray (daytime) and infrared light (night) environment
Drafting, as seen in figures 3-6.Wherein, it is followed successively by 0% according to order from left to right, from top to bottom in camera lens point range figure (Spt)
Camera lens point range subgraph when visual field, 30% visual field, 50% visual field, 70% visual field, 100% visual field；Transfer curve (Mtf) is each
Have mark in lines is respectively the transmission under 0% visual field, 25.33% visual field, 38% visual field, 53.73% visual field, 76% visual field
Function curve.
2nd, camera lens point range figure (Spt) under each temperature (- 20 DEG C, 20 DEG C, 80 DEG C) environment, transfer curve (Mtf) are painted
System, as shown in fig.7-12.Wherein, in camera lens point range figure (Spt) according to order from left to right, from top to bottom be followed successively by 0 visual field,
Camera lens point range subgraph when 30% visual field, 50% visual field, 70% visual field, 100% visual field；Transfer curve (Mtf) each lines
In have mark be respectively 0% visual field, 25.33% visual field, 38% visual field, 53.73% visual field, 76% visual field under transmission function
Curve.
Note：
1. camera lens point range figure (Spt)：Many light that object space is a little sent are after optical system, because aberration makes itself and image planes
Intersection point no longer concentrate on same point, and form one and be dispersed in a range of dispersion pattern, by this dispersion pattern
Size is quantized into RMS RADIUS values in camera lens point range figure Spt (maximum radius that can approximately represent dispersion pattern).As camera lens spt
RMS RADIUS values<During video camera induction chip picture number point size, represent camera lens point range figure spt RMS RADIUS values with taking the photograph
Camera induction chip matches, i.e., camera lens and video camera induction chip are adapted.
2. transfer curve (Mtf)：Refer to the ratio between the contrast of picture and the contrast of thing under certain space frequency.Can reflection
The transmission capacity of different space frequency, different contrast.In general, high frequency transmission function reflects object detail transmission energy
Power, low frequency transmission function reflection contour of object transmission capacity, intermediate frequency transmission function reflects the transmission capacity to object level.Setting
MTF curve illustrates that the imaging effect of output is good in all design high point, the curve smoothing decline as far as possible of low frequency, intermediate frequency, high frequency in meter.
Abscissa is the resolution ratio of system, and its unit is：Line is right/mm.Ordinate is higher, and " contrast " is higher, and it is more clear to be imaged.
3rd, conclusion：
If from Fig. 3-6 as can be seen that matching video camera sensor target surfaces (the taking the photograph of generally using of existing market that be 1/2.7 "
The target surface length-width ratio of camera induction chip is 4:3、16:9), resolution of video camera 3MP, camera lens needs to reach with subscript in the design
It is accurate：RMS RADIUS values in 70% visual field spt<(visible light wave range and near infrared band meet the requirements 2.65um in design
Meet the requirements), the value of the transmission function MTF of 70% visual field at 160lp/mm>0.25 (visible light wave range and near-infrared in design
Wave band meets the requirements).The correlation values that the wide-angle of the application uses on-vehicle lens are up to standard, you can with it is existing
Market is often matched with video camera induction chip.
From Fig. 7-12 as can be seen that under from-20 DEG C of low temperature to 80 DEG C of environment of high temperature, the wide-angle of the application uses on-vehicle lens
The floating of RMS RADIUS values and mtf value in Spt in 70% visual field is within 20%, and its image still can be normally defeated
Go out, undistorted, camera lens can be with normal work.
With the contrast of 3 documents data described in background technology：
In terms of resolution ratio, as can be seen that the wide-angle of the application uses on-vehicle lens from transfer curve (Mtf)
Resolution ratio is substantially better than 3 documents.The MTF abscissas of the documents of application number 201510556596.8 are in 100lp/
During mm, its ordinate is concentrated between 0.2-0.5, and this camera lens, in 100lp/mm, contrast is between 0.6-0.8；Application
The MTF abscissas of numbers 200910099703.3 documents are in 45lp/mm, and its ordinate is concentrated between 0.6-0.9, and
This camera lens is all 0.9 or so；The contrast of the peripheral field of the documents of Application No. 201620158537.5 declines very
Severity, the contrast of 73 ° of visual fields is high apparently without the contrast of 76 ° of visual fields of this camera lens.It can be seen that, the wide-angle of the application uses vehicle-mounted
The imaging effect of camera lens is superior to existing wide-angle high definition on-vehicle lens.
In general, the optical index that the multi-purpose on-vehicle lens of the wide-angle of the application are reached is as follows：Focal length：F=3.0mm ±
10%；Relative aperture f/D=1/2 ± 10%；Angle of visual field 2w >=160 ° ± 10% (2 η of image space linear field >=φ 6.74mm ±
10%)；Optical texture length：ΣL≤21mm；It is applicable spectral region：480nm-850nm；Resolution of lens：With 3MP grades of high definitions
Clear ccd video camera or cmos camera adaptation；During spatial frequency 160lp/mm, the MTF of all visual fields is superior to 0.18；Fixed light
Circle.Relative illumination is up to 40%.The wide-angle of the application is using on-vehicle lens with existing video camera induction chip broad match, is applicable
External temperature environment is extensive, and imaging effect is splendid.
Wide-angle described in the utility model uses on-vehicle lens and is not only limited only to above-described embodiment, every according to this
Any improvement or replacement of utility model principle, all should be within protection domain of the present utility model.
Claims (10)
1. a kind of wide-angle uses on-vehicle lens, it is characterised in that：Including the first lens element set gradually since object space
(1), the second lens element (2), the 3rd lens element (3), the 4th lens element (4), the 5th lens element (5) and the 6th lens
Element (6), wherein：
First lens element (1) be with negative focal power and in object space side evagination focal length be -7.69 to -
8.50mm crescent lens；
Second lens element (2) is the biconcave lens that the focal length with negative focal power is -4.31 to -4.77mm；
3rd lens element (3) is the biconvex lens that the focal length with positive focal power is 4.03 to 4.45mm；
4th lens element (4) is the biconvex lens that the focal length with positive focal power is 3.76 to 4.16mm；
5th lens element (5) be with negative focal power and in image space side evagination focal length be -5.20 to
5.74mm crescent lens；
6th lens element (6) is the biconvex lens that the focal length with positive focal power is 8.65 to 9.56mm；
4th lens element (4) and the 5th lens element (5) contiguity constitute cemented doublet together.
2. wide-angle according to claim 1 uses on-vehicle lens, it is characterised in that：The folding of first lens element (1)
Rate Nd is penetrated for 1.5-1.6, Abbe number Vd is 39-40；The refractive index Nd of second lens element (2) is 1.5-1.6, Abbe
Coefficient Vd is 47-48；The refractive index Nd of 3rd lens element (3) is 2.0-2.1, and Abbe number Vd is 28-29；Described
The refractive index Nd of four lens elements (4) is 1.5-1.6, and Abbe number Vd is 68-69；The refraction of 5th lens element (5)
Rate Nd is 1.9-2.0, and Abbe number Vd is 17-18；The refractive index Nd of 6th lens element (6) is 1.8-1.9, Abbe system
Number Vd is 46-47.
3. wide-angle according to claim 2 uses on-vehicle lens, it is characterised in that：The wide-angle uses on-vehicle lens and also wrapped
Include the aperture member (7) being arranged between the 3rd lens element (3) and the 4th lens element (4).
4. wide-angle according to claim 3 uses on-vehicle lens, it is characterised in that：The wide-angle uses on-vehicle lens and also wrapped
Include and fix the body tube (8) of each lens element for clamp, be set in body tube (8) being used for and main close to the side end of object space one
Lens barrel (8) coordinates fixed each lens element locations and prevents each lens element preceding trim ring (9) of abjection, use from body tube (8)
In keeping spacer ring A (10) with the 3rd lens element (3) relative distance of second lens element (2), in the middle part of inner chamber for blocking
If aperture member (7) and the spacer ring B for keeping the 3rd lens element (3) and the 4th lens element (4) relative distance
(11) and for keeping the spacer ring C (12) of the 5th lens element (5) and the 6th lens element (6) relative distance.
5. wide-angle according to claim 4 uses on-vehicle lens, it is characterised in that：First lens element (1) and the
The air gap between two lens elements (2) is 3.2-3.3mm, between the second lens element (2) and the 3rd lens element (3)
The air gap is 1.3-1.4mm, and the air gap between the 3rd lens element (3) and the 4th lens element (4) is 2.6-
2.7mm, the air gap between the 5th lens element (5) and the 6th lens element (6) is 0.5-0.6mm.
6. wide-angle according to claim 5 uses on-vehicle lens, it is characterised in that：First lens element (1), second
Lens element (2), the 3rd lens element (3), the 4th lens element (4), the 5th lens element (5), the 6th lens element (6) are
Using glass material, the aperture member (7), body tube (8) and preceding trim ring (9) use metal material.
7. wide-angle according to claim 6 uses on-vehicle lens, it is characterised in that：First lens element (1), second
Lens element (2), the 3rd lens element (3), the 4th lens element (4), the 5th lens element (5), the 6th lens element (6)
Surface is all covered with the light effective transmissivity for ensureing each lens element in 480-850nm spectral range>99.5%
Multicoating.
8. wide-angle according to claim 4 uses on-vehicle lens, it is characterised in that：The spacer ring A (10), spacer ring B (11)
It is the inner chamber two ends bore buckle structure that can be used to eliminate veiling glare narrow compared with inner chamber stage casing bore with spacer ring C (12).
9. wide-angle according to claim 4 uses on-vehicle lens, it is characterised in that：First lens element (1) and master
The axially facing surface of lens barrel (8), which is provided with, to be used to lift the O-shaped rubber ring (13) that wide-angle uses on-vehicle lens water resistance.
10. the wide-angle according to claim any one of 1-9 uses on-vehicle lens, it is characterised in that：The wide-angle multiservice car
Carry to be bonded on when camera lens is used in video camera fuselage (14) front end, described video camera fuselage (14) and be provided with video camera induction chip
(141), wide-angle is used after on-vehicle lens and video camera fuselage (14) engagement, and it is many that the video camera induction chip (141) is located at wide-angle
With the dead astern of on-vehicle lens, the endface position that the nearly wide-angle of video camera induction chip (141) uses on-vehicle lens is provided with for keeping away
Exempt from video camera induction chip (141) directly to contact to play guarantor to video camera induction chip (141) with the multi-purpose on-vehicle lens of wide-angle
The induction chip protection window (142) of shield effect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720052886.3U CN206557463U (en) | 2017-01-16 | 2017-01-16 | Wide-angle uses on-vehicle lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720052886.3U CN206557463U (en) | 2017-01-16 | 2017-01-16 | Wide-angle uses on-vehicle lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206557463U true CN206557463U (en) | 2017-10-13 |
Family
ID=60358121
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720052886.3U Active CN206557463U (en) | 2017-01-16 | 2017-01-16 | Wide-angle uses on-vehicle lens |
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| Country | Link |
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| CN (1) | CN206557463U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108919455A (en) * | 2018-09-12 | 2018-11-30 | 东莞市玖洲光学有限公司 | A kind of high definition automotive rear-view camera lens |
| TWI695186B (en) * | 2017-11-07 | 2020-06-01 | 玉晶光電股份有限公司 | Optical imaging lens |
| CN111323895A (en) * | 2018-12-14 | 2020-06-23 | 光芒光学股份有限公司 | Lens and manufacturing method thereof |
| CN112099193A (en) * | 2020-09-30 | 2020-12-18 | 福建福特科光电股份有限公司 | Small TOF lens |
| US11314043B2 (en) | 2018-09-10 | 2022-04-26 | Sintai Optical (Shenzhen) Co., Ltd. | Lens assembly including six lenses of −−++−+ refractive powers |
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2017
- 2017-01-16 CN CN201720052886.3U patent/CN206557463U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI695186B (en) * | 2017-11-07 | 2020-06-01 | 玉晶光電股份有限公司 | Optical imaging lens |
| US11314043B2 (en) | 2018-09-10 | 2022-04-26 | Sintai Optical (Shenzhen) Co., Ltd. | Lens assembly including six lenses of −−++−+ refractive powers |
| CN108919455A (en) * | 2018-09-12 | 2018-11-30 | 东莞市玖洲光学有限公司 | A kind of high definition automotive rear-view camera lens |
| CN108919455B (en) * | 2018-09-12 | 2023-09-29 | 东莞市玖洲光学有限公司 | High-definition automobile rearview mirror |
| CN111323895A (en) * | 2018-12-14 | 2020-06-23 | 光芒光学股份有限公司 | Lens and manufacturing method thereof |
| CN112099193A (en) * | 2020-09-30 | 2020-12-18 | 福建福特科光电股份有限公司 | Small TOF lens |
| CN112099193B (en) * | 2020-09-30 | 2021-07-09 | 福建福特科光电股份有限公司 | Small TOF lens |
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