CN204515222U - Long-pupil-distance short-wave infrared spectrum imaging objective lens - Google Patents
Long-pupil-distance short-wave infrared spectrum imaging objective lens Download PDFInfo
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- CN204515222U CN204515222U CN201520146010.6U CN201520146010U CN204515222U CN 204515222 U CN204515222 U CN 204515222U CN 201520146010 U CN201520146010 U CN 201520146010U CN 204515222 U CN204515222 U CN 204515222U
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- 238000003384 imaging method Methods 0.000 title abstract description 10
- 238000002329 infrared spectrum Methods 0.000 title 1
- 239000011521 glass Substances 0.000 claims abstract description 8
- 239000005308 flint glass Substances 0.000 claims abstract description 6
- 239000005383 fluoride glass Substances 0.000 claims abstract description 5
- 238000001228 spectrum Methods 0.000 claims description 14
- 229910004261 CaF 2 Inorganic materials 0.000 claims description 8
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 7
- 238000005452 bending Methods 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 abstract description 12
- 230000003595 spectral effect Effects 0.000 abstract description 7
- 201000009310 astigmatism Diseases 0.000 abstract description 4
- 238000002834 transmittance Methods 0.000 abstract description 2
- 238000004566 IR spectroscopy Methods 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 13
- 230000004075 alteration Effects 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 239000000571 coke Substances 0.000 description 4
- 239000006185 dispersion Substances 0.000 description 4
- 238000000701 chemical imaging Methods 0.000 description 3
- 229910016036 BaF 2 Inorganic materials 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000005331 crown glasses (windows) Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004611 spectroscopical analysis Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 238000009615 fourier-transform spectroscopy Methods 0.000 description 1
- 239000005304 optical glass Substances 0.000 description 1
- 210000001747 pupil Anatomy 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Abstract
The utility model discloses a long interpupillary distance shortwave infrared spectroscopy formation of image objective. The objective lens comprises five lenses which are sequentially arranged on a system optical axis from the diaphragm to the image surface. The first three lenses are achromatic glass pairs with positive, negative and positive focal powers, and the combination of the fluoride glass and the flint glass has good achromatism capability in a short-wave infrared band and good spectral transmittance. The fourth lens is used for balancing astigmatism and field curvature of the system so as to increase the field capacity of the imaging objective lens, and the fifth lens is used for further compensating the astigmatism of the objective lens and meeting the telecentric requirement of the imaging objective lens on the image space; finally, the requirement of long interpupillary distance and achromatic quality in a short wave infrared band can be met.
Description
Technical field:
The utility model relates to a kind of optical imagery object lens, particularly relates to the long interpupillary distance short-wave infrared image-forming objective lens for light spectrum image-forming.
Background technology:
Light spectrum image-forming is the imaging detection mode of a kind of collection of illustrative plates unification, and the view data obtained is generally the data cube containing two-dimensional space information and one dimension spectral information.
Spectral imaging technology conventional at present mainly contains three classes:
First kind spectral imaging technology adopts filter technology to obtain the spectroscopic data of image;
Equations of The Second Kind spectral imaging technology adopts Dispersive to obtain the spectroscopic data of piece image;
3rd class is the interference spectrum imaging technique adopting Fourier Transform Spectroscopy.
Especially the 3rd class interference spectrum imaging technique is subject to increasing attention because it has high-throughout exemplary advantage, is the hot spot technology studied in the world at present.
Liar for static interference light spectrum image-forming is very different with conventional image-forming objective lens, ultraprecise interferometer component to be put in the image-forming objective lens light path of this class, thus should reduce the size of interferometer in actual applications as far as possible, in order to reduce the size of interferometer, usually the entrance pupil of image-forming objective lens is placed on the centre of interferometer component, simultaneously often require that object lens realize the image space heart far away to realize good imaging spectral, the method realizing the image space heart far away generally adopts to put light marge and to be placed in object lens front focus.
For the image-forming objective lens on external smooth hurdle, enter interpupillary distance and refer to the position of the first surface of optical system to light hurdle, transmission-type image-forming objective lens is made up of multiple eyeglass in order to the requirement of aberration correction under normal circumstances, this just makes the front focus position of object lens often be less than the focal length of a times, and based on the interferometer of short-wave infrared, often there is very long light path, therefore require that image-forming objective lens must have and long enter interpupillary distance to mate size and the light path requirement of interferometer, and realize the image space heart far away to meet the requirement of light spectrum image-forming simultaneously.
Short-wave infrared typically refers to the electromagnetic radiation of wavelength 1000nm ~ 2500nm, and this wave band has many important detection demands, and this demand often realizes with the means of light spectrum image-forming.Transmission type optical system all can adopt spherical surface shape and have processing technology simple, and equipment adjustment is easy, the feature that Project Realization degree high cost is cheap, thus makes it have a wide range of applications.And on this wave band, realize transmission-type spectrum imaging system must the aberration of correcting optical system well, the optical material transmitance that must have on this spectral coverage simultaneously.
One of important means of optical system chromatic aberration correction is exactly utilize the different dispersions of optical material to carry out rational focal power distribution, under normal circumstances, transmission type optical system is made up of the eyeglass of several positive light cokes and negative power, often positive lens is made with the crown glass that dispersion is little when visible light wave range carries out chromatic aberration correction, negative lens made by the flint glass that dispersion is large, but the glass of this two type changes in its dispersion characteristics of short infrared wave band, the right combination of common optical glass is difficult to realize the correction to aberration, adopting in this way can not correcting chromatic aberration effectively, the transmitance of crown glass also has the reduction of transmitance and can not meet the performance index requirement of optical system between 2200nm ~ 2500nm simultaneously, thus the spectral band of short-wave infrared must adopt suitable optical material carry out coupling and rational structural shape to realize the chromatic aberration correction of this wave band.
Utility model content:
The utility model devises a kind of long interpupillary distance short-wave infrared light spectrum image-forming object lens, can meet long interpupillary distance and the achromatism requirement at short infrared wave band.
The technical solution of the utility model is as follows:
Long interpupillary distance short-wave infrared light spectrum image-forming object lens, comprise five lens set gradually on light hurdle to the light path of image planes; Wherein the first lens, the second lens and the 3rd lens are respectively biconvex eyeglass, bend towards the bent moon eyeglass on light hurdle and biconvex eyeglass, and forming focal power is positive and negative, positive achromatism glass pair, is the combination of fluoride glass and dense flint glass on the whole; 4th lens and the 5th lens are the infrared quartz glass bent moon eyeglass bending towards light hurdle of negative power.
The distance of above-mentioned smooth hurdle and the first lens is the system focal length of 1.8 times.
Above-mentioned fluoride glass can be selected from CaF
2and BaF
2, dense flint glass is selected from ZF series and Xiao Te material SF series.
The preferred materials of first three sheet lens is configured to: the material of the first lens is CaF
2, the material of the second lens is SF
6, the material of the 3rd lens is CaF
2.
The utility model has following technique effect:
First three sheet lens is focal power is positive and negative, positive achromatism glass pair, and the fluoride glass of employing and the short-wave infrared section that is combined in of dense flint glass have good achromatism ability, have good spectral transmittance simultaneously.4th lens are used for astigmatism and the curvature of field of balanced system, and to increase the visual field ability of image-forming objective lens, the 5th lens are used for the astigmatism compensating object lens further, the heart requirement far away of the image space simultaneously for meeting image-forming objective lens.Finally can realize long interpupillary distance and the achromatism requirement at short infrared wave band.
Accompanying drawing explanation
Fig. 1 is image-forming objective lens structural shape schematic diagram of the present utility model.
Fig. 2 is the MTF curve of the present embodiment object lens when ruleization focal length 100mm.
Embodiment:
As shown in Figure 1, image-forming objective lens comprises light hurdle and eyeglass 1 ~ 5, is together sequentially arranged on systematic optical axis oo ' together with image planes (imaging detector).
Light hurdle is placed on before system, and distance first eyeglass is the focal length value of 1.8 times.
Eyeglass 1 is for having the biconvex eyeglass of positive light coke, and material therefor is CaF
2, eyeglass 2 is for having the bent moon eyeglass bending towards light hurdle of negative power, and material therefor is SF6, and eyeglass 3 is for having the biconvex eyeglass of positive light coke, and material therefor is CaF
2;
The eyeglass with positive light coke all can adopt CaF
2and BaF
2, the eyeglass with negative power all can adopt ZF or SF series, and therefore eyeglass 1,2,3 can have the combination of three kinds of modes, Ji Zheng ?Fu ?Zheng, Fu ?Zheng ?positive, Zheng ?Zheng ?negative combination.
Eyeglass 4 is less than the thick bent moon eyeglass of 2 for the radius-thickness ratio bending towards light hurdle with negative power, and material therefor is infrared quartz glass, and eyeglass 5 is for having the bent moon eyeglass bending towards light hurdle of negative power, and material therefor is infrared quartz glass.
The MTF curve of the present embodiment object lens when ruleization focal length 100mm as shown in Figure 2.The image space telecentric imaging objective on this preposition smooth hurdle has 1.8 times to the interpupillary distance of growing into of focal length, the field angle of 10 °, the relative aperture of F#5, in the wide spectral range of wavelength 900 ~ 2500nm, correct aberration well, achieve when objective focal length is 100mm and to reach in full filed and close to the image quality of diffraction limit.
Claims (3)
1. long interpupillary distance short-wave infrared light spectrum image-forming object lens, is characterized in that: comprise five lens set gradually on light hurdle to the light path of image planes; Wherein the first lens, the second lens and the 3rd lens are respectively biconvex eyeglass, bend towards the bent moon eyeglass on light hurdle and biconvex eyeglass, and forming focal power is positive and negative, positive achromatism glass pair, is the combination of fluoride glass and dense flint glass on the whole; 4th lens and the 5th lens are the infrared quartz glass bent moon eyeglass bending towards light hurdle of negative power.
2. long interpupillary distance short-wave infrared light spectrum image-forming object lens according to claim 1, is characterized in that: the distance of described smooth hurdle and the first lens is the system focal length of 1.8 times.
3. long interpupillary distance short-wave infrared light spectrum image-forming object lens according to claim 1, is characterized in that: the first lens are CaF
2glass, the second lens are SF
6glass, the 3rd lens are CaF
2glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520146010.6U CN204515222U (en) | 2015-03-13 | 2015-03-13 | Long-pupil-distance short-wave infrared spectrum imaging objective lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520146010.6U CN204515222U (en) | 2015-03-13 | 2015-03-13 | Long-pupil-distance short-wave infrared spectrum imaging objective lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204515222U true CN204515222U (en) | 2015-07-29 |
Family
ID=53713178
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520146010.6U Expired - Fee Related CN204515222U (en) | 2015-03-13 | 2015-03-13 | Long-pupil-distance short-wave infrared spectrum imaging objective lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204515222U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105301752A (en) * | 2015-11-18 | 2016-02-03 | 山西大学 | Near-infrared long-working distance monochromatic microscopic objective lens with NA=0.4 |
| CN110989142A (en) * | 2019-12-30 | 2020-04-10 | 中国科学院长春光学精密机械与物理研究所 | Preposed common-caliber dual-waveband achromatic lens of Fourier transform imaging spectrometer |
-
2015
- 2015-03-13 CN CN201520146010.6U patent/CN204515222U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105301752A (en) * | 2015-11-18 | 2016-02-03 | 山西大学 | Near-infrared long-working distance monochromatic microscopic objective lens with NA=0.4 |
| CN110989142A (en) * | 2019-12-30 | 2020-04-10 | 中国科学院长春光学精密机械与物理研究所 | Preposed common-caliber dual-waveband achromatic lens of Fourier transform imaging spectrometer |
| CN110989142B (en) * | 2019-12-30 | 2021-07-06 | 中国科学院长春光学精密机械与物理研究所 | Preposed common-caliber dual-waveband achromatic lens of Fourier transform imaging spectrometer |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150729 Termination date: 20190313 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |