CN108008528A - A kind of three visual field optical system of axial direction zoom shortwave - Google Patents
A kind of three visual field optical system of axial direction zoom shortwave Download PDFInfo
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- CN108008528A CN108008528A CN201710997229.0A CN201710997229A CN108008528A CN 108008528 A CN108008528 A CN 108008528A CN 201710997229 A CN201710997229 A CN 201710997229A CN 108008528 A CN108008528 A CN 108008528A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/0081—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 with means for altering, e.g. enlarging, the entrance or exit pupil
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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
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Abstract
The present invention relates to a kind of axial three visual field optical system of zoom shortwave, the three visual field optical system of axial zoom applied to 0.9 1.7 mu m waveband of shortwave is devised, focal length is respectively 40mm, 120mm, 360mm；Large, medium and small three visual fields are realized by the movement of zoom group and compensation group, and the compensation of hot defocus is realized by motion compensation group, realizes and is imaged within the scope of larger temperature；Realize that the F numbers of large, medium and small three visual fields are adjustable using iris diaphgram, select system clear aperture on demand to realize, control prevents overexposure；Common visible ray glass materials are all chosen, and high image quality is all realized using sphere, are not used any aspherical etc..Optical system is to be operated in the infrared three-field imaging system of 0.9 1.7 mu m wavebands, realizes the design of 9 times of zoom ratios of axial movement mode；All spherical lenses, and using common and optical glass in stock, material obtains, handling ease.
Description
Technical field
The invention belongs to three visual field optical systems, and in particular to a kind of three visual field optical system of axial direction zoom shortwave.
Background technology
The thermal imaging system i.e. design feature of the video camera with visible ray of short infrared wave band is worked in, and there is middle long wave
The energy feature of thermal infrared imager, belongs between a kind of theoretical thermal imaging system with luminosity theory of emittance.It can be achieved to penetrate
Cigarette, mist, haze, snow etc. limit and the ability of identification camouflage, can it is remote to the realization of goal of the high-temperature plume such as aircraft, guided missile,
Round-the-clock observation.
The optical system of visible ray (0.4-0.8 μm) wave band is worked in, although its material can be applied to shortwave optical system
System, but because wave band is different, cause the abbe number of optical material different, lens surface plated film is also different, therefore visible ray
Camera lens or optical system are not directly applicable the imaging of short-wave band.Although that is material is of the same name, substantive property is
Differ greatly.For fear of the development of shortwave detector, short-wave infrared optical system does not obtain enough attention always.
The implementation of domestic and international infrared three-field variable-power optical system, is divided into radial direction cut-in manner and axial movement side
Formula.Three visual field optical system of radial direction cut-in manner realizes the conversion of three visual fields, the party by way of the switching of different zoom microscope groups
The advantages of formula is that narrow visual field has highest plain shaft precision and highest optical transmittance.Shortcoming is due to using radially switching side
Formula causes that system radial dimension is excessive, motion is complicated and heavier-weight.Three visual field optical system of axial movement mode
Realize the conversion of three visual fields with diverse location of the compensation microscope group on optical axis by zoom microscope group, the advantages of which is system
It is small, light-weight.
Patent CN104297899A discloses a kind of passive athermal short-wave infrared optical system of big visual field, works in 0.9-
2.5 μm, be made of six pieces of lens, and introduce it is aspherical, F numbers be 1.4, focal length 24.7mm.But because it is haplopia field optics
System, can not realize the demand of the detection and identification of more visual fields, and operating distance is limited.
The three visual field optical systems for working in middle long wave infrared region have had more report, such as CN103558679B,
Disclose a kind of three visual field optical system of long wave, focal length 20mm, 92mm, 560mm.By moving axially one group of lens, and cut
Enter one flat plate glass and realize three visual fields.And for example two constituent elements, the three visual field infrared optical system disclosed by CN104297923A, leads to
Cross axial zoom, mechanical compensation realizes the design of three visual fields.But it can not be applied because its service band is long wave or medium wave
In shortwave imaging system, and three visual field optical system of infrared shortwave then yet there are no all reports.
The content of the invention
Technical problems to be solved
In order to avoid the shortcomings of the prior art, the present invention proposes a kind of axial three visual field optical system of zoom shortwave,
Three view field imagings can be realized in the case where ensureing the quality of optical imaging of each visual field of optical system, while can realize the work(for becoming F numbers
Energy.Three visual fields are realized by the movement of zoom group 3 and compensation group 4, and the compensation of hot defocus is realized by motion compensation group 4, it is real
It is imaged within the scope of now larger temperature.
Technical solution
A kind of three visual field optical system of axial direction zoom shortwave, it is characterised in that including object plane 1, preceding fixed lens group 2, zoom
Lens group 3, offset lens group 4, afocal variable diaphragm 5, rear fixed lens group 6 and detector image planes 7, wherein same lens body
Upper front surface is close to the surface of object plane 1, and rear surface is close to the surface of image planes 7；The preceding fixed lens group 2 is including biconvex just
Lens 201, double-concave negative lens 202 and bent moon positive lens 203, axial centre distance is from object plane to image planes direction between three pieces lens
It is followed successively by 4.3mm, 0.5mm；；The Zoom lens group 3 includes bent moon negative lens 301, double-concave negative lens 302, biconvex positive lens
303 and double-concave negative lens 304, between four lens axial centre distance be followed successively by from object plane to image planes direction 15.6mm,
0.5mm、2.3mm；The offset lens group 4 includes biconvex positive lens 401, bent moon negative lens 402 and bent moon positive lens 403, and three
Axial centre distance is followed successively by 0.5mm, 0.8mm from object plane to image planes direction between piece lens；Fixed lens group 6 includes after described
Bent moon positive lens 601, bent moon negative lens 602 and bent moon positive lens 603,601 distance variable bore diaphragm of bent moon positive lens 5 are axial
Centre distance is 0.5mm, between three pieces lens axial centre distance be followed successively by from object plane to image planes direction 3.2mm, 3mm,
3.1mm；
Axial centre spacing is 3mm, Zoom lens group 3 and compensation between fixed lens group 2 and Zoom lens group 3 before adjustment
Axial centre spacing is 145.9mm between lens group 4, and axial centre spacing is between offset lens group 4 and afocal variable diaphragm 5
3mm, forms the big visual field light path of optical system, it is 38.9mm that afocal variable diaphragm 5 is unified at this time；
Axial centre spacing is 53.6mm between fixed lens group 2 and Zoom lens group 3 before adjustment, Zoom lens group 3 with
Axial centre spacing is 86.5mm between offset lens group 4, between offset lens group 4 and afocal variable diaphragm 5 between axial centre
Away from for 11.7mm, visual field light path in optical system is formed, at this time the unified about 19.3mm of afocal variable diaphragm 5；
Axial centre spacing is 59.5mm between fixed lens group 2 and Zoom lens group 3 before adjustment, Zoom lens group 3 with
Axial centre spacing is 3mm between offset lens group 4, and axial centre spacing is between offset lens group 4 and afocal variable diaphragm 5
89.4mm, forms optical system small field of view light path, it is 12.9mm that afocal variable diaphragm 5 is unified at this time.
The afocal variable diaphragm 5 adjusts bore by motor, and small field of view 6, middle visual field are 4, big visual field is 2.
201 glass material of biconvex positive lens is HZK20, and front surface radius 133mm, rear surface radius is -249, thoroughly
Mirror center thickness 29mm, unified 134mm；202 glass material of double-concave negative lens is HZF62, front surface radius -229mm, after
Surface radius is 345mm, lens centre thickness 3mm, unified 127mm；203 glass material of bent moon positive lens is HZK20, preceding
Surface radius 120mm, rear surface radius are 2730mm, lens centre thickness 17mm, unified 119mm.
301 glass material of bent moon negative lens is HFK61, and front surface radius 124mm, rear surface radius is 40mm, thoroughly
Mirror center thickness 6mm, bore 65；302 glass material of double-concave negative lens is HFK61, and front surface radius -69mm, rear surface is partly
Footpath is 72mm, lens centre thickness 3mm, unified 52mm；303 glass material of biconvex positive lens is HZF62, front surface radius
57mm, rear surface radius are -159mm, lens centre thickness 11mm, unified 53mm.
304 glass material of double-concave negative lens is HZLAF52, and front surface radius -86mm, rear surface radius is 75mm,
Lens centre thickness 3mm, unified 52；401 glass material of biconvex positive lens is HZK20, front surface radius 60mm, rear surface
Radius about -381, lens centre thickness 9mm, unified 51mm；402 glass material of bent moon negative lens is HZF62, and front surface is partly
Footpath 70mm, rear surface radius are 34mm, lens centre thickness 3mm, unified 49mm；403 glass material of bent moon positive lens is
HFK61, front surface radius 35mm, rear surface radius are 19000mm, lens centre thickness 11mm, unified 45mm.
601 glass material of bent moon positive lens is HZK20, and front surface radius 82mm, rear surface radius is 272, lens
Center thickness 4mm, unified 38mm；602 glass material of bent moon negative lens is HZF62, front surface radius -84mm, rear surface
Radius is -136mm, lens centre thickness 3mm, unified 37mm；603 glass material of bent moon positive lens is HZK20, front surface
Radius -127mm, rear surface radius are -77mm, lens centre thickness 3mm, unified 32mm.
Beneficial effect
A kind of axial three visual field optical system of zoom shortwave proposed by the present invention, according to visible light optical system design side
Method, takes axial zoom, the method for mechanical compensation, devises three visual field of axial zoom applied to shortwave 0.9-1.7 mu m wavebands
Optical system, focal length are respectively 40mm, 120mm, 360mm；Large, medium and small three are realized by the movement of zoom group 3 and compensation group 4
A visual field, and realize by motion compensation group 4 compensation of hot defocus, realize and be imaged within the scope of larger temperature；Using variable
Diaphragm realizes that the F numbers of large, medium and small three visual fields are adjustable, selects system clear aperture on demand to realize, control prevents overexposure；
Common visible ray glass materials are all chosen, and high image quality is all realized using sphere, are not used any aspherical etc..
Beneficial effect：
1st, optical system is to be operated in the infrared three-field imaging system of 0.9-1.7 mu m wavebands, realizes axial movement side
The design of 9 times of zoom ratios of formula；
2nd, F numbers are variable, and small field of view 6, middle visual field are 4, big visual field is 2, to adjust light-inletting quantity, prevent overexposure；
3rd, all spherical lenses, and using common and optical glass in stock, material obtains, handling ease；
4th, the application of iris diaphgram, it is possible to achieve adjustable, the processing of mitigation backend electronics white balance of system illuminance of image plane
Difficulty.
Brief description of the drawings
Fig. 1 is the large visual field optical system topology view of the present invention；
Fig. 2 is the middle visual field optical system structure view of the present invention；
Fig. 3 is the small field of view optical system structure view of the present invention；
Embodiment
In conjunction with embodiment, attached drawing, the invention will be further described：
The object plane 1 of optical system including unlimited distance, preceding fixed lens group 2, Zoom lens group 3, offset lens group 4, can
Calibre-changeable diaphragm 5, rear fixed lens group 6, detector image planes 7 form.Front surface is the table close to object plane 1 on same lens body
Face, rear surface are close to the surface of image planes 7, are repeated no more below.
Include object plane 1, preceding fixed lens group 2, Zoom lens group 3, the offset lens of unlimited distance successively by light path trend
Group 4, afocal variable diaphragm 5, rear fixed lens group 6, detector image planes 7 form.Wherein preceding fixed group is made of three pieces lens, double
Convex positive lens 201, double-concave negative lens 202, bent moon positive lens 203 are formed；Zoom lens group is made of four lens, and bent moon is born
Mirror 301, double-concave negative lens 302, biconvex positive lens 303, double-concave negative lens 304 are formed；Offset lens group is made of three pieces lens,
Biconvex positive lens 401, bent moon negative lens 402, bent moon positive lens 403 are formed；Fix group afterwards to be made of three pieces lens, bent moon is just saturating
Mirror 601, bent moon negative lens 602, bent moon positive lens 603 are formed.
Wherein preceding fixed group is made of three pieces lens, biconvex positive lens 201, double-concave negative lens 202, bent moon positive lens 203
Form：201 glass material of lens is HZK20, and front surface radius about 133mm, rear surface radius is about -249, and lens centre thickness is about
29mm, unified about 134mm；202 glass material of lens is HZF62, front surface radius about -229mm, and rear surface radius is about
345mm, lens centre thickness about 3mm, unified about 127mm；203 glass material of lens is HZK20, front surface radius about 120mm,
Rear surface radius is about 2730mm, lens centre thickness about 17mm, unified about 119mm.Axial centre distance between three pieces lens
From left to right direction (be exactly object plane to image planes direction, repeat no more below) is about 4.3mm, 0.5mm successively.
Zoom lens group is made of four lens, bent moon negative lens 301, double-concave negative lens 302, biconvex positive lens 303, double
Recessed negative lens 304 is formed：301 glass material of lens is HFK61, and front surface radius about 124mm, rear surface radius is about 40mm,
Lens centre thickness about 6mm, bore about 65；302 glass material of lens is HFK61, front surface radius about -69mm, rear surface radius
About 72mm, lens centre thickness about 3mm, unified about 52mm；303 glass material of lens is HZF62, and front surface radius is about
57mm, rear surface radius are about -159mm, lens centre thickness about 11mm, unified about 53mm；304 glass material of lens is
HZLAF52, front surface radius about -86mm, rear surface radius are about 75mm, lens centre thickness about 3mm, and unified about 52.Four
From left to right direction is about 15.6mm, 0.5mm, 2.3mm successively to axial centre distance between lens.
Offset lens group is made of three pieces lens, biconvex positive lens 401, bent moon negative lens 402,403 structure of bent moon positive lens
Into；401 glass material of lens is HZK20, and front surface radius about 60mm, rear surface radius is about -381, and lens centre thickness is about
9mm, unified about 51mm；402 glass material of lens is HZF62, and front surface radius about 70mm, rear surface radius is about 34mm,
Lens centre thickness about 3mm, unified about 49mm；403 glass material of lens is HFK61, and front surface radius about 35mm, rear surface is partly
Footpath is about 19000mm, lens centre thickness about 11mm, unified about 45mm.Axial centre is apart from from left to right between three pieces lens
Direction is about 0.5mm, 0.8mm successively.
Fix group afterwards to be made of three pieces lens, bent moon positive lens 601, bent moon negative lens 602, bent moon positive lens 603 are formed.
601 glass material of lens is HZK20, and front surface radius about 82mm, rear surface radius is about 272, lens centre thickness about 4mm, entirely
Bore about 38mm；602 glass material of lens is HZF62, front surface radius about -84mm, and rear surface radius is about -136mm, lens
Center thickness about 3mm, unified about 37mm；603 glass material of lens is HZK20, front surface radius about -127mm, rear surface radius
About -77mm, lens centre thickness about 3mm, unified about 32mm.601 distance variable bore diaphragm of lens, 5 axial centre distance is
0.5mm.From left to right direction is about 3.2mm, 3mm, 3.1mm successively to axial centre distance between three pieces lens.
When Zoom lens group 3 and offset lens group 4 are in position shown in Fig. 1, the big visual field light path of optical system is formed；Thoroughly
Axial centre is spaced about 3mm between microscope group 2 and lens group 3, and axial centre is spaced about between lens group 3 and lens group 4
145.9mm, axial centre is spaced about 3mm between lens group 4 and afocal variable diaphragm 5, forms the big visual field light path of optical system,
The unified about 38.9mm of afocal variable diaphragm 5 at this time；
When Zoom lens group 3 vertically with the movement close to each other vertically of offset lens group 4, in shown in Fig. 2 during position,
Form visual field light path in optical system；Axial centre is spaced about 53.6mm between lens group 2 and lens group 3, lens group 3 with thoroughly
Axial centre is spaced about 86.5mm between microscope group 4, and axial centre is spaced about between lens group 4 and afocal variable diaphragm 5
11.7mm, forms visual field light path in optical system, at this time the unified about 19.3mm of afocal variable diaphragm 5；
When Zoom lens group 3 and offset lens group 4 continue movement close to each other vertically, in shown in Fig. 3 during position, structure
Into optical system small field of view light path.Axial centre is spaced about 59.5mm, lens group 3 and lens between lens group 2 and lens group 3
Axial centre is spaced about 3mm between group 4, and axial centre is spaced about 89.4mm between lens group 4 and afocal variable diaphragm 5,
Optical system small field of view light path is formed, at this time the unified about 12.9mm of afocal variable diaphragm 5.
The movement of lens group, by driving stepper motor, moves linearly along guide rail or polished rod.It can pass through when the temperature is changed
The compensation that offset lens group 4 realizes hot defocus is moved back and forth, that is, is exactly mechanical passive athermal method.Afocal variable diaphragm 5 can be with
Bore is adjusted by motor, realizes the adjusting of F numbers under different visual fields, while can also realize the image planes under different bright dark fields
Illumination is adjusted.
The movement of lens group, by driving stepper motor, moves linearly along guide rail or polished rod.It can pass through when the temperature is changed
Move back and forth the compensation that offset lens group 4 realizes hot defocus.
Afocal variable diaphragm 5 can adjust bore by motor, realize the adjusting of F numbers under different visual fields, while can be with
Realize that the illuminance of image plane under different bright dark fields is adjusted.
Big visual field focal length is 360 ㎜ (F numbers are 6), middle visual field focal length is 120mm (F numbers are 4), small field of view focal length is 40mm
(F numbers are 2)；System is by the way of Polaroid；The first face of system --- the axial direction of 201 front surface of lens to detector image planes
Space length is 360mm.The large, medium and small visual field of distortion is respectively smaller than equal to 3.5%, 1.5%, 0.06% in full filed.Full filed
Interior MTF evaluations large, medium and small visual field at 20lp/mm, which is respectively greater than, is equal to 0.597,0.714,0.629.
Its applicable detector is pixel number 640 × 512, the short-wave infrared focus planar detector of 25 μm of pixel size, is fitted
Use wavelength：0.9μm-1.7μm；Centre wavelength：1.3μm；Effective imaging area：16mm×12.8mm.
Claims (6)
1. a kind of three visual field optical system of axial direction zoom shortwave, it is characterised in that including object plane [1], preceding fixed lens group [2], become
Times lens group [3], offset lens group [4], afocal variable diaphragm [5], rear fixed lens group [6] and detector image planes [7], wherein
Front surface is close to the surface of object plane [1] on same lens body, and rear surface is close to the surface of image planes [7]；It is fixed before described
Lens group [2] includes biconvex positive lens [201], double-concave negative lens [202] and bent moon positive lens [203], the countershaft of three pieces lens
4.3mm, 0.5mm are followed successively by centre distance from object plane to image planes direction；；The Zoom lens group [3] includes bent moon negative lens
[301], double-concave negative lens [302], biconvex positive lens [303] and double-concave negative lens [304], between four lens axial centre away from
15.6mm, 0.5mm, 2.3mm are followed successively by from from object plane to image planes direction；The offset lens group [4] includes biconvex positive lens
[401], bent moon negative lens [402] and bent moon positive lens [403], axial centre distance is from object plane to image planes side between three pieces lens
To being followed successively by 0.5mm, 0.8mm；It is described after fixed lens group [6] include bent moon positive lens [601], bent moon negative lens [602] and
Bent moon positive lens [603], bent moon positive lens [601] distance variable bore diaphragm [5] axial centre distance is 0.5mm, and three pieces are saturating
Axial centre distance is followed successively by 3.2mm, 3mm, 3.1mm from object plane to image planes direction between mirror；
Axial centre spacing is 3mm between fixed lens group [2] and Zoom lens group [3] before adjustment, and Zoom lens group [3] is with mending
Axial centre spacing is 145.9mm between repaying lens group [4], between offset lens group [4] and afocal variable diaphragm [5] in axial direction
In the heart away from for 3mm, the big visual field light path of optical system is formed, it is 38.9mm that afocal variable diaphragm [5] is unified at this time；
Axial centre spacing is 53.6mm between fixed lens group [2] and Zoom lens group [3] before adjustment, Zoom lens group [3]
Axial centre spacing is 86.5mm, offset lens group [4] and the countershaft of afocal variable diaphragm [5] between offset lens group [4]
It is 11.7mm to center spacing, forms visual field light path in optical system, afocal variable diaphragm [5] is unified about at this time
19.3mm；
Axial centre spacing is 59.5mm between fixed lens group [2] and Zoom lens group [3] before adjustment, Zoom lens group [3]
Axial centre spacing is 3mm between offset lens group [4], between offset lens group [4] and afocal variable diaphragm [5] in axial direction
In the heart away from for 89.4mm, optical system small field of view light path is formed, it is 12.9mm that afocal variable diaphragm [5] is unified at this time.
2. axial three visual field optical system of zoom shortwave according to claim 1, it is characterised in that：The afocal variable diaphragm
[5] bore is adjusted by motor, small field of view 6, middle visual field are 4, big visual field is 2.
3. axial three visual field optical system of zoom shortwave according to claim 1, it is characterised in that：The biconvex positive lens
[201] glass material is HZK20, front surface radius 133mm, and rear surface radius is -249, lens centre thickness 29mm, unified
134mm；Double-concave negative lens [202] glass material is HZF62, and front surface radius -229mm, rear surface radius is 345mm,
Lens centre thickness 3mm, unified 127mm；Bent moon positive lens [203] glass material is HZK20, front surface radius 120mm,
Rear surface radius is 2730mm, lens centre thickness 17mm, unified 119mm.
4. axial three visual field optical system of zoom shortwave according to claim 1, it is characterised in that：The bent moon negative lens
[301] glass material is HFK61, front surface radius 124mm, and rear surface radius is 40mm, lens centre thickness 6mm, bore 65；Institute
It is HFK61 to state double-concave negative lens [302] glass material, and front surface radius -69mm, rear surface radius is 72mm, and lens centre is thick
3mm, unified 52mm；Biconvex positive lens [303] glass material is HZF62, front surface radius 57mm, rear surface radius
For -159mm, lens centre thickness 11mm, unified 53mm.
5. axial three visual field optical system of zoom shortwave according to claim 1, it is characterised in that：The double-concave negative lens
[304] glass material is HZLAF52, front surface radius -86mm, and rear surface radius is 75mm, lens centre thickness 3mm, unified
52；Biconvex positive lens [401] glass material is HZK20, front surface radius 60mm, rear surface radius about -381, in lens
The heart thickness 9mm, unified 51mm；Bent moon negative lens [402] glass material is HZF62, and front surface radius 70mm, rear surface is partly
Footpath is 34mm, lens centre thickness 3mm, unified 49mm；Bent moon positive lens [403] glass material is HFK61, and front surface is partly
Footpath 35mm, rear surface radius are 19000mm, lens centre thickness 11mm, unified 45mm.
6. axial three visual field optical system of zoom shortwave according to claim 1, it is characterised in that：The bent moon positive lens
[601] glass material is HZK20, and front surface radius 82mm, rear surface radius is 272, lens centre thickness 4mm, unified 38mm；
Bent moon negative lens [602] glass material is HZF62, front surface radius -84mm, and rear surface radius is -136mm, in lens
The heart thickness 3mm, unified 37mm；Bent moon positive lens [603] glass material is HZK20, front surface radius -127mm, rear surface
Radius is -77mm, lens centre thickness 3mm, unified 32mm.
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| CN201710997229.0A CN108008528B (en) | 2017-10-24 | 2017-10-24 | Axial zoom short wave three-view-field optical system |
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| CN201710997229.0A CN108008528B (en) | 2017-10-24 | 2017-10-24 | Axial zoom short wave three-view-field optical system |
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| CN109781143A (en) * | 2019-01-25 | 2019-05-21 | 苏州大学 | A kind of athermal Dynamic Star simulator optical system |
| CN110543004A (en) * | 2019-08-27 | 2019-12-06 | 杭州图谱光电科技有限公司 | Digital microscope objective with high magnification and large zoom ratio |
| CN112764298A (en) * | 2021-01-31 | 2021-05-07 | 迪擎光电(台州)有限责任公司 | Projection lens system |
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| CN109781143A (en) * | 2019-01-25 | 2019-05-21 | 苏州大学 | A kind of athermal Dynamic Star simulator optical system |
| CN110543004A (en) * | 2019-08-27 | 2019-12-06 | 杭州图谱光电科技有限公司 | Digital microscope objective with high magnification and large zoom ratio |
| CN112764298A (en) * | 2021-01-31 | 2021-05-07 | 迪擎光电(台州)有限责任公司 | Projection lens system |
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