CN104317035B - Object lens of large relative aperture, strong Penetrating Fog, ultralow veiling glare pick-up lens - Google Patents
Object lens of large relative aperture, strong Penetrating Fog, ultralow veiling glare pick-up lens Download PDFInfo
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- CN104317035B CN104317035B CN201410586050.2A CN201410586050A CN104317035B CN 104317035 B CN104317035 B CN 104317035B CN 201410586050 A CN201410586050 A CN 201410586050A CN 104317035 B CN104317035 B CN 104317035B
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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
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
-
- 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
- G02B7/022—Mountings, adjusting means, or light-tight connections, for optical elements for lenses lens and mount having complementary engagement means, e.g. screw/thread
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B11/00—Filters or other obturators specially adapted for photographic purposes
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Blocking Light For Cameras (AREA)
- Optical Filters (AREA)
Abstract
The present invention relates to a kind of object lens of large relative aperture, strong Penetrating Fog, ultralow veiling glare pick-up lens, its optical system be sequentially provided with along light direction focal power be positive front group of A, iris assembly B, focal power be rear group of positive C and light filter transition components D, before described, group A is sequentially provided with positive crescent moon lens A 1, negative crescent moon lens A 2 and biconvex lens A 3 the first glued group touched and the second glued group touched by positive crescent moon lens A 4 and biconcave lens A 5, and described rear group C is provided with biconvex lens C.This camera lens has high resolution in the wide spectral range of 400nm～1000nm, relative aperture reaches 1: 2, coefficient of stray light is less than 1/10000, realize centering under the conditions of rainy day, the snow special weather such as sky, mist, the monitoring of distant object and ultralow coefficient of stray light and effectively eliminate the deceitful picture produced under high light goal condition, improve system monitoring ability.
Description
Technical field
The present invention relates to the optical pick-up apparatus of photoelectric video technology, particularly a kind of object lens of large relative aperture, strong Penetrating Fog, ultralow veiling glare pick-up lens.
Background technology
In existing routine, the pick-up lens clear aperture of remote monitoring less, response spectrum is narrower, i.e. visible ray spectral wavelength λ is less, under complex environment, the particularly special weather such as rain, snow, mist, light declines through ability, picture contrast, definition is caused to decline, shorten monitoring distance, and under high light goal condition, be easily generated deceitful picture etc. and have a strong impact on the monitoring capability of system.
Summary of the invention
In view of the deficiencies in the prior art, it is an object of the invention to provide a kind of object lens of large relative aperture, strong Penetrating Fog, ultralow veiling glare pick-up lens, have under the specific conditions such as rain, snow, mist, high light target more higher monitoring capability than common lens.
To achieve these goals, the technical scheme is that a kind of object lens of large relative aperture, strong Penetrating Fog, ultralow veiling glare pick-up lens, its optical system be sequentially provided with along light direction focal power be positive front group of A, iris assembly B, focal power be rear group of positive C and light filter transition components D, organizing A before described and be sequentially provided with positive crescent moon lens A-1, negative crescent moon lens A-2 and biconvex lens A-3 the first glued group touched and the second glued group touched by positive crescent moon lens A-4 and biconcave lens A-5, described rear group C is provided with biconvex lens C.
Further, the airspace between described front group A and rear group C is 60.0mm.
Further, the airspace between described rear group C and light filter transition components D is 10.0mm.
Further, the airspace between the glued group of positive crescent moon lens A-1 and first in described front group A is 56.0mm, and the airspace between the described first glued group and the second glued group is 4.2mm.
nullFurther，The frame for movement of described camera lens includes the first lens barrel、Second lens barrel、Trinocular tube、Middle lens barrel、4th lens barrel、Light filter rotating disk and rear flange，The front screening glass compressed by front screening glass trim ring is installed in described first lens barrel front end，It is provided with first in the middle part of described first lens barrel to disappear veiling glare light hurdle，Described first lens barrel rear end is connected by the first joint bolt and the second lens barrel front end，The positive crescent moon lens A-1 compressed by A-1 lens trim ring is installed in described second lens barrel front end，It is provided with second in the middle part of described second lens barrel to disappear veiling glare light hurdle，Described second lens barrel rear end inward flange is connected by the second joint bolt and trinocular tube front end，The negative crescent moon lens A-2 compressed by A-2 lens trim ring it is sequentially installed with in described trinocular tube、Biconvex lens A-3、Positive crescent moon lens A-4 and the biconcave lens A-5 compressed by A-5 lens trim ring，Described second lens barrel outward flange is connected with middle lens barrel front end by the 3rd joint bolt，Described intermediate mirror tube rear end is connected by the 4th joint bolt and the 4th lens barrel front end，It is disposed with the 3rd in described 4th lens barrel to disappear veiling glare light hurdle、The 4th veiling glare light hurdle and the 5th that disappears disappears veiling glare light hurdle，Described 4th disappear veiling glare light hurdle and the 5th disappear be provided with between veiling glare light hurdle by C lens trim ring compress biconvex lens C，In described light filter rotating disk, the light filter compressed by light filter trim ring is installed，The rear screening glass compressed by rear screening glass trim ring is installed in described rear flange.
Further, described light filter rotating disk is driven by gear drive by electric machine assembly, magnet steel and equally distributed four kinds of light filters are installed on described light filter rotating disk, described four kinds of light filters comprise visible filter, infrared filter, QB3 light filter and CB6 light filter, described visible filter is equipped with corresponding visible filter Hall element, described infrared filter is equipped with corresponding infrared filter Hall element, described QB3 light filter is equipped with corresponding QB3 light filter Hall element, described CB6 light filter is equipped with corresponding CB6 light filter Hall element.
Further, described 4th lens barrel is fixedly installed in primary mirror seat, described light filter rotating disk is arranged on primary mirror seat by light filter dish rotating shaft and is compressed by light filter dish rotating shaft trim ring, described electric machine assembly is arranged on primary mirror seat, the driven by motor motor driving gear of described electric machine assembly, described motor driving gear is meshed with light filter rotating disk external toothing.
Compared with prior art, the invention have the advantages that this camera lens has high resolution in the wide spectral range of 400nm～1000nm, relative aperture reaches 1: 2, coefficient of stray light is less than 1/10000, the light filter transition components controlled is driven by the micro machine arranged in light path, coordinate wide spectral response video camera, realize centering under the conditions of rainy day, the snow special weather such as sky, mist, the monitoring of distant object and ultralow coefficient of stray light and effectively eliminate the deceitful picture produced under high light goal condition, improve system monitoring ability.
Accompanying drawing explanation
Fig. 1 is the optical system diagram of the embodiment of the present invention.
Fig. 2 is the mechanical construction drawing of the embodiment of the present invention.
Fig. 3 is the structural representation of light filter shifter.
Fig. 4 is the cross-sectional schematic in Fig. 3 at A-A.
Fig. 5 is the control principle block diagram of light filter shifter.
In Fig. 1: organize A, A-1-positive crescent moon lens A-1, A-2-before A-and bear crescent moon lens A-2, A-3-biconvex lens A-3, A-4-positive crescent moon lens A-4, A-5-biconcave lens A-5, B-iris assembly B, organize C/ biconvex lens C, D-light filter transition components D, O-image planes after C-.
nullIn Fig. 2 ~ 4: screening glass before 1-，Screening glass trim ring before 2-，3-first disappears veiling glare light hurdle，4-positive crescent moon lens A-1，5-the first lens barrel，6-A-1 lens trim ring，7-the first joint bolt，8-the second lens barrel，9-second disappears veiling glare light hurdle，10-bears crescent moon lens A-2，11-biconvex lens A-3，12-A-2 lens trim ring，13-trinocular tube，14-the second joint bolt，15-the 3rd joint bolt，16-positive crescent moon lens A-4，17-biconcave lens A-5，18-A-5 lens trim ring，19-the 4th joint bolt，20-the 4th lens barrel，21-the 3rd disappears veiling glare light hurdle，22-the 4th disappears veiling glare light hurdle，23-C lens trim ring，24-the 5th disappears veiling glare light hurdle，25-light filter rotating disk，26-light filter trim ring，27-biconvex lens C，28-rear flange，Screening glass trim ring after 29-，30-light filter，Screening glass after 31-，41-electric machine assembly，42-CB6 light filter Hall element，43-visible filter，45-CB6 light filter，46-magnet steel，47-QB3 light filter Hall element，48-QB3 light filter，49-infrared filter Hall element，50-infrared filter，51-visible filter Hall element，52-primary mirror seat，53-light filter dish rotating shaft，53-light filter dish rotating shaft trim ring.
Detailed description of the invention
With embodiment the present invention made further details of elaboration below in conjunction with the accompanying drawings.
As shown in Figure 1, a kind of object lens of large relative aperture, strong Penetrating Fog, ultralow veiling glare pick-up lens, the optical system of described camera lens along light incident direction from left to right be sequentially provided with focal power be positive front group of A, iris assembly B, focal power be rear group of positive C and light filter transition components D, organizing A before described and be sequentially provided with positive crescent moon lens A-1, negative crescent moon lens A-2 and biconvex lens A-3 the first glued group touched and the second glued group touched by positive crescent moon lens A-4 and biconcave lens A-5, described rear group C is provided with biconvex lens C.
In the present embodiment, before described, the airspace between group A and rear group C is 60.0mm, after described, the airspace between group C and light filter transition components D is 10.0mm, before described, the airspace between the glued group of the positive crescent moon lens A-1 and first in group A is 56.0mm, and the airspace between the described first glued group and the second glued group is 4.2mm.
nullAs shown in Fig. 2 ~ 4，The frame for movement of described camera lens includes the first lens barrel 5、Second lens barrel 8、Trinocular tube 13、Middle lens barrel、4th lens barrel 20、Light filter rotating disk 25 and rear flange 28，In described first lens barrel 5 front end, the front screening glass 1 compressed by front screening glass trim ring 2 is installed，It is provided with first in the middle part of described first lens barrel 5 to disappear veiling glare light hurdle 3，Described first lens barrel 5 rear end is connected with the second lens barrel 8 front end by the first joint bolt 7，The positive crescent moon lens A-1 compressed by A-1 lens trim ring 6 is installed in described second lens barrel 8 front end，It is provided with second in the middle part of described second lens barrel 8 to disappear veiling glare light hurdle 9，Described second lens barrel 8 rear end inward flange is connected with trinocular tube 13 front end by the second joint bolt 14，The negative crescent moon lens A-2 compressed by A-2 lens trim ring 12 it is sequentially installed with in described trinocular tube 13、Biconvex lens A-3、Positive crescent moon lens A-4 and the biconcave lens A-5 compressed by A-5 lens trim ring 18，Described second lens barrel 8 outward flange is connected with middle lens barrel front end by the 3rd joint bolt 15，Described intermediate mirror tube rear end is connected with the 4th lens barrel 20 front end by the 4th joint bolt 19，It is disposed with the 3rd in described 4th lens barrel 20 to disappear veiling glare light hurdle 21、The 4th veiling glare light hurdle 22 and the 5th that disappears disappears veiling glare light hurdle 24，The described 4th veiling glare light hurdle 22 and the 5th that disappears disappears and is provided with the biconvex lens C compressed by C lens trim ring 23 between veiling glare light hurdle 24，The light filter 30 compressed by light filter trim ring 26 is installed in described light filter rotating disk 25，The rear screening glass 31 compressed by rear screening glass trim ring 29 is installed in described rear flange 28.
In the present embodiment, present invention employs the design of ultralow veiling glare: veiling glare is to enter visual field non-targeted light of imaging on target surface, the reflection image that primary event on the secondary reflection being mainly derived between eyeglass and Jing Bi produces, if the light after primary event particularly on Jing Bi does not block clean and enters visual field, its energy, up to about the 10% of target energy, is very easy to the deceitful picture of reflection Jing Bi occur.As only leaned on car delustring screw thread and matt finishing to increase the diffuse-reflectance of Jing Bi, reduce its reflectance, deceitful picture that high light target in Jing Bi reflection produce can't be completely eliminated.Therefore the structure at lens barrel designs the structure design using the veiling glare light hurdle that disappears, the method of design is except the delustring light marge of design necessity, in the case of volume allows, as much as possible big for the design of lens barrel inwall, enable delustring light hurdle to stop all of Jing Bi and reflect light, be allowed to not enter visual field.Simultaneously the parameter of the Jing Bi designed, disappear veiling glare light hurdle and eyeglass is substituted into optical processes to carry out disappearing THE CALCULATION OF STRAY LIGHT；As result of calculation can not meet technical requirement, then redesign position and the size of lens barrel on delustring light hurdle, then the program that substitutes into calculates；By repeatedly iterating calculating, until result of calculation meets the technical requirements；The position on delustring light hurdle and the structure of size and lens barrel are as shown in Figure 2.
In the present embodiment, in order to ensure the energy hole of veiling glare less than 1/10000, it is necessary to whether calculate the secondary reflecting image between all eyeglasses away from target surface with optical processes.If secondary reflecting imaging therein is on target surface, then can produce the deceitful picture that between eyeglass, secondary reflection causes.Now must re-start design with ZEMAX optical processes to calculate.By repeatedly iterate computing so that it is optical index meets the secondary reflecting image between technical conditions requirement, and all eyeglasses away from target surface, and its optical parametric is as shown in Figure 1.
In the present embodiment, present invention employs the design of strong fog penetrating function: under the conditions of the haze weathers such as rain, snow, mist, contain small water particle in atmosphere, according to Mie theory: when the ratio C/λ of scattering particles radius C Yu incident ray wavelength X is less, the luminous energy at image planes epigraph declines less.Accordingly when optical design, increase the weight of near-infrared spectral line (wavelength X is more than 800nm spectral line), make camera lens have higher resolution near infrared band.And carry out coatings optimization design, optical lens is made to have the transmitance higher than 80% in 450nm-900nm wavelength band, placed high-precision light filter shifter in the optical path simultaneously, driven by micro machine and control light filter shifter, light filter 30 is high pass filter, filter out the visible light of 450～700nm, making the light ray anti-reflection of 700～more than 900nm thus reach to filter out can not be by the visible light of mist, improve the ratio of near infrared spectrum, increase the detectivity of distant object.
In the present embodiment, described light filter rotating disk 25 is driven by gear drive by electric machine assembly 41, magnet steel 46 and equally distributed four kinds of light filters 30 are installed on described light filter rotating disk 25, described four kinds of light filters 30 comprise visible filter 43, infrared filter 50, QB3 light filter 48 and CB6 light filter 45, described visible filter 43 is equipped with corresponding visible filter Hall element 51, described infrared filter 50 is equipped with corresponding infrared filter Hall element 49, described QB3 light filter 48 is equipped with corresponding QB3 light filter Hall element 47, described CB6 light filter 45 is equipped with corresponding CB6 light filter Hall element 42.
In the present embodiment, described 4th lens barrel 20 is fixedly installed in primary mirror seat 52, described light filter rotating disk 25 is arranged on primary mirror seat 52 by light filter dish rotating shaft 53 and is compressed by light filter dish rotating shaft trim ring 54, described electric machine assembly 41 is arranged on primary mirror seat 52, the driven by motor motor driving gear of described electric machine assembly 41, described motor driving gear is meshed to drive light filter rotating disk 25 with light filter rotating disk 25 external toothing.Owing to light filter rotating disk 25 moves, magnet steel 46 is moved the most simultaneously, when magnet steel 46 is respectively close to Hall element, Hall element is under the action of a magnetic field, being become low resistive state by high-impedance state, the outfan of Hall element is become low level by high level, and this signal is passed to the microcomputer on lens control plate, after computer obtains the signal of Hall element, order motor stops；Then light filter rotating disk 25 stop motion.
In the present embodiment, design light filter, Hall element, the relative position of magnet steel 46 can make color filter film accurately be parked on optical axis position, the present invention arranges four kinds of color filter films and is respectively visible ray K9 light filter, 0.85-0.95um near-infrared HWB1 light filter, QB3 light filter, CB6 yellow filter, respectively by four hall element output signals to computer, computer just can be parked in required light filter position in the middle of light path accurately according to host command and Hall element signal, and its control principle block diagram is as shown in Figure 5.
In the present embodiment, this camera lens has the wide spectral range high resolution from 400nm to 1000nm and the object lens of large relative aperture of 1: 2 and 1/10000 ultralow veiling glare, can be under the specific conditions such as rain, snow, mist and high light target, there is provided without deceitful picture photosignal for video camera, produce the video image of high resolution, it is effectively improved the monitoring capability to high light target, there is electronic light modulation Real-time Feedback, light filter translation function.This camera lens has reached following optical index: (1) focal length: f '=150mm；(2) angle of visual field: horizontal field of view: 2 ω >=2.2 °, vertical field of view: 2 ω >=1.6 °；(3) relative aperture: >=1/2；(4) optical filter quantity: 4；(5) coefficient of stray light is not more than 1/10000；(6) distortion: be not more than 0.3%；(7) service band: 400nm～1000nm.
The foregoing is only presently preferred embodiments of the present invention, all impartial changes done according to scope of the present invention patent and modification, all should belong to the covering scope of the present invention.
Claims (7)
1. an object lens of large relative aperture, strong Penetrating Fog, ultralow veiling glare pick-up lens, it is characterized in that: the optical system of described camera lens be sequentially provided with along light direction focal power be positive front group of A, iris assembly B, focal power be rear group of positive C and light filter transition components D, organizing A before described and be sequentially provided with positive crescent moon lens A-1, negative crescent moon lens A-2 and biconvex lens A-3 the first glued group touched and the second glued group touched by positive crescent moon lens A-4 and biconcave lens A-5, described rear group C is provided with biconvex lens C.
Object lens of large relative aperture the most according to claim 1, strong Penetrating Fog, ultralow veiling glare pick-up lens, it is characterised in that: before described, the airspace between group A and rear group C is 60.0mm.
Object lens of large relative aperture the most according to claim 1, strong Penetrating Fog, ultralow veiling glare pick-up lens, it is characterised in that: after described, the airspace between group C and light filter transition components D is 10.0mm.
4. according to the object lens of large relative aperture described in claim 1,2 or 3, strong Penetrating Fog, ultralow veiling glare pick-up lens, it is characterized in that: before described, the airspace between the glued group of the positive crescent moon lens A-1 and first in group A is 56.0mm, the airspace between the described first glued group and the second glued group is 4.2mm.
nullObject lens of large relative aperture the most according to claim 1、Strong Penetrating Fog、Ultralow veiling glare pick-up lens，It is characterized in that: the frame for movement of described camera lens includes the first lens barrel、Second lens barrel、Trinocular tube、Middle lens barrel、4th lens barrel、Light filter rotating disk and rear flange，The front screening glass compressed by front screening glass trim ring is installed in described first lens barrel front end，It is provided with first in the middle part of described first lens barrel to disappear veiling glare light hurdle，Described first lens barrel rear end is connected by the first joint bolt and the second lens barrel front end，The positive crescent moon lens A-1 compressed by A-1 lens trim ring is installed in described second lens barrel front end，It is provided with second in the middle part of described second lens barrel to disappear veiling glare light hurdle，Described second lens barrel rear end inward flange is connected by the second joint bolt and trinocular tube front end，The negative crescent moon lens A-2 compressed by A-2 lens trim ring it is sequentially installed with in described trinocular tube、Biconvex lens A-3、Positive crescent moon lens A-4 and the biconcave lens A-5 compressed by A-5 lens trim ring，Described second lens barrel outward flange is connected with middle lens barrel front end by the 3rd joint bolt，Described intermediate mirror tube rear end is connected by the 4th joint bolt and the 4th lens barrel front end，It is disposed with the 3rd in described 4th lens barrel to disappear veiling glare light hurdle、The 4th veiling glare light hurdle and the 5th that disappears disappears veiling glare light hurdle，Described 4th disappear veiling glare light hurdle and the 5th disappear be provided with between veiling glare light hurdle by C lens trim ring compress biconvex lens C，In described light filter rotating disk, the light filter compressed by light filter trim ring is installed，The rear screening glass compressed by rear screening glass trim ring is installed in described rear flange.
Object lens of large relative aperture the most according to claim 5, strong Penetrating Fog, ultralow veiling glare pick-up lens, it is characterized in that: described light filter rotating disk is driven by gear drive by electric machine assembly, magnet steel and equally distributed four kinds of light filters are installed on described light filter rotating disk, described four kinds of light filters comprise visible filter, infrared filter, QB3 light filter and CB6 light filter, described visible filter is equipped with corresponding visible filter Hall element, described infrared filter is equipped with corresponding infrared filter Hall element, described QB3 light filter is equipped with corresponding QB3 light filter Hall element, described CB6 light filter is equipped with corresponding CB6 light filter Hall element.
Object lens of large relative aperture the most according to claim 6, strong Penetrating Fog, ultralow veiling glare pick-up lens, it is characterized in that: described 4th lens barrel is fixedly installed in primary mirror seat, described light filter rotating disk is arranged on primary mirror seat by light filter dish rotating shaft and is compressed by light filter dish rotating shaft trim ring, described electric machine assembly is arranged on primary mirror seat, the driven by motor motor driving gear of described electric machine assembly, described motor driving gear is meshed with light filter rotating disk external toothing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410586050.2A CN104317035B (en) | 2014-10-28 | 2014-10-28 | Object lens of large relative aperture, strong Penetrating Fog, ultralow veiling glare pick-up lens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410586050.2A CN104317035B (en) | 2014-10-28 | 2014-10-28 | Object lens of large relative aperture, strong Penetrating Fog, ultralow veiling glare pick-up lens |
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| Publication Number | Publication Date |
|---|---|
| CN104317035A CN104317035A (en) | 2015-01-28 |
| CN104317035B true CN104317035B (en) | 2016-08-24 |
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| CN201410586050.2A Active CN104317035B (en) | 2014-10-28 | 2014-10-28 | Object lens of large relative aperture, strong Penetrating Fog, ultralow veiling glare pick-up lens |
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| KR20230169311A (en) * | 2021-04-14 | 2023-12-15 | 베이징 시아오미 모바일 소프트웨어 컴퍼니 리미티드 | FILTER CHANGER |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05157965A (en) * | 1991-12-06 | 1993-06-25 | Nikon Corp | Wide-angle lens |
| JP2009230040A (en) * | 2008-03-25 | 2009-10-08 | Brother Ind Ltd | Wide-angle imaging lens |
| JP2010186011A (en) * | 2009-02-12 | 2010-08-26 | Olympus Imaging Corp | Wide angle optical system and image pickup apparatus using the same |
| CN204166188U (en) * | 2014-10-28 | 2015-02-18 | 福建福光数码科技有限公司 | Object lens of large relative aperture, strong Penetrating Fog, ultralow parasitic light pick-up lens |
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