CN103995342A - Near-infrared hyperspectral optical imaging device - Google Patents
Near-infrared hyperspectral optical imaging device Download PDFInfo
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- CN103995342A CN103995342A CN201410205930.0A CN201410205930A CN103995342A CN 103995342 A CN103995342 A CN 103995342A CN 201410205930 A CN201410205930 A CN 201410205930A CN 103995342 A CN103995342 A CN 103995342A
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Abstract
The invention discloses a near-infrared hyperspectral optical imaging device. The near-infrared hyperspectral optical imaging device comprises a front-arranged objective lens set, a field diaphragm, a collimating lens set and a near-infrared band acousto-optic adjustable light filter, wherein the front-arranged object lens set, the field diaphragm, the collimating lens set and the near-infrared band acousto-optic adjustable light fiber are arranged on the same light path. An imaging lens set and a detector are sequentially arranged on the transmission light path of positive first-order diffraction O light after diffraction by the acousto-optic adjustable light filter, and a light barrier is arranged on the transmission light path of negative first-order diffraction E light after diffraction by the acousto-optic adjustable light filter and zero-order light. The system focal length f',the front-arranged objective lens focal length f2', the collimating lens set focal length f3' and the imaging lens set focal length f4' respectively meet the formulas: f1'/f2'=1, and f3'/f'=-1. The device has the advantages of being simple in structure and light in weight and can be used for the fields of target recognition, abnormal target detection, camouflage target recognition and others under the complex background of a near-infrared waveband reflection spectrum.
Description
Technical field
The present invention relates to a kind of near infrared ultraphotic spectroscopic optics imaging device, can be used for the fields such as target identification under complex background that reflectance spectrum is near-infrared band, Anomaly target detection, camouflaged target identification.
Background technology
Along with the fast development of camouflage, military target and natural background difference are more and more less, and conventional target detection means have been proposed to more and more higher requirement.Only rely on information that traditional single band, wide spectrum investigating system provide cannot meet the demand of modern military, need to be with multispectral, ultra-optical spectrum imaging system, potential target is surveyed, obtain location estimation, objective attribute target attribute, for war simulation, threat analysis and aid decision making etc. provide accurate information.
Multispectral/Hyper spectral Imaging Detection Techniques can fully reflect target and the background spectral distribution feature of attribute separately, have very important application prospect at aspects such as low probability target detection, camouflaged target detection, camouflage effectiveness detection, missile guidance application.In the equipment such as photoelectric alertness, detection, adopt multispectral/ultraphotic spectrum Detection Techniques, be conducive to disclose classification, combination and the style characteristic of target, the interference of Background suppression, improves the ability of target detection, identification.
According to different needs, Hyper spectral Imaging Detection Techniques can be applied in different wavelength band, at visible ray/near-infrared band, (0.4～2.5 μ m), (3～5 μ m) for medium-wave infrared wave band, (8～14 μ m) all can carry out imaging spectral detection to long wave infrared region, wherein visible/near infrared wave band is solar reflection optical spectrum district, reflection at this band detection earth's surface object can be obtained soil types, water body characteristic, vegetation distributes and military equipment, the information such as army's deployment, can tell real goal and decoy under green vegetation background, under the background of desert, can fast detecting go out the little target of the tactics such as military vehicle.
Non-colinear acousto-optic turnable filter (Acousto-Optic TunableFilter is called for short AOTF), as a kind of beam splitter, is very suitable for light spectrum image-forming field.TeO2 crystal is except the volume that has non-colinear acousto-optic crsytal and have is little, solid structure, insensitive to vibrating; Diffraction efficiency is high; Tuning range is wide, tuning flexibly and outside the speed outstanding acousto-optic performance characteristics such as fast, also has very wide clear area scope, can be used as visible ray to the acousto-material using near infrared range.The acousto-optic turnable filter that TeO2 crystal is made is a kind of automatically controlled light filter, the sound wave producing by additional radiofrequency signal forms grating in anisotropic TeO2 crystal, by regulating additional radio frequency to select diffraction light wavelength, can rapid sequential or random tuning Hyper spectral Imaging device.
At present, super spectrum optical imaging system is mainly deposited defect and deficiency both ways:
(1) visible ray/near infrared AOTF operating wavelength range adopting is 0.4～1.0 μ m, and the near-infrared band target in complex environment for reflectance spectrum more than 1.0 μ m is difficult to identification;
(2) for drift, the reduction of imaging resolution and the problem of image drift of the angle of diffraction causing due to the dispersion of crystalline material, need to add single wedge or multiple wedge combines to eliminate the image drift that dispersion causes at the outgoing end face of AOTF, this has increased the volume and weight of whole system undoubtedly.
Summary of the invention
The object of the invention is to, overcome the problems of the prior art and deficiency, a kind of near infrared ultraphotic spectroscopic optics imaging device based on acousto-optic turnable filter is provided, its operating wavelength range is 0.9 μ m～1.7 μ m, the diffraction light angle drift of the near-infrared band AOTF that these optical devices adopt is controlled in 0.01 °, has improved ultraphotic spectroscopic optics imaging resolution.
The technical solution adopted for the present invention to solve the technical problems is: a kind of near infrared ultraphotic spectroscopic optics imaging device, comprise and be arranged on pre-objective group in same light path, field stop, collimation lens set and near-infrared band acousto-optic turnable filter, in the transmission light path of the positive first-order diffraction O light after acousto-optic turnable filter diffraction, be disposed with imaging lens group and detector, negative first-order diffraction E light after acousto-optic turnable filter diffraction and the transmission light path of zero order light are provided with light barrier, described system focal length
, pre-objective group focal length
, collimation lens set focal length
with imaging lens group focal length
meet respectively:
。
Described a kind of near infrared ultraphotic spectroscopic optics imaging device, its pre-objective group comprises the heavy crown positive meniscus lens of a slice H-FK61 material biconvex lens, a slice barium crown diverging meniscus lens, a slice dense flint positive meniscus lens and a slice of being arranged in same light path, wherein barium crown diverging meniscus lens and dense flint positive meniscus lens composition cemented doublet.
Described a kind of near infrared ultraphotic spectroscopic optics imaging device, its collimation lens set comprises a slice H-ZK21 material positive meniscus lens, a slice lanthanum flint diverging meniscus lens, a slice H-ZF12 material biconcave lens and a slice lanthanum flint biconvex lens that are arranged in same light path, wherein positive meniscus lens and lanthanum flint diverging meniscus lens composition cemented doublet, biconcave lens and lanthanum flint biconvex lens composition cemented doublet.
Described a kind of near infrared ultraphotic spectroscopic optics imaging device, its imaging lens group comprises a slice H-FK61 material biconvex lens, a slice barium crown positive meniscus lens and a slice dense flint diverging meniscus lens and a slice lanthanum flint positive meniscus lens that are arranged in same light path, wherein barium crown positive meniscus lens and dense flint diverging meniscus lens composition cemented doublet.
Described a kind of near infrared ultraphotic spectroscopic optics imaging device, that the beam splitter of its acousto-optic turnable filter adopts is acousto-optic crsytal TeO2, positive first-order diffraction O light after TeO2 diffraction and the angle of departure of zero order light are more than or equal to 5.6 °, and the positive first-order diffraction O light after acousto-optic crsytal TeO2 diffraction is 3 ° along the deflection angle of incident light optical axis direction.
Described a kind of near infrared ultraphotic spectroscopic optics imaging device, the incident light aperture of its TeO2 crystal is 10mm × 10mm, and its service band is 0.9 μ m～1.7 μ m, and driving frequency scope is 37MHZ～110MHZ, the line width at 1.7 mum wavelength places is less than or equal to 15nm, wave band number is greater than 70, and diffraction efficiency is more than or equal to 60%, and the clear aperture of described TeO2 is 10mm, focal length is-80mm, operating wavelength range is 0.9 μ m～1.7 μ m, and image planes are of a size of 1/3 inch, and Pixel size is 30 μ m.
Described a kind of near infrared ultraphotic spectroscopic optics imaging device, the focal length of its pre-objective group and collimation lens set is 50mm, and visual field is 4.3 °, and relative aperture is 1/5, and the focal length of described imaging lens group is 80mm, relative aperture is 1/8.
The invention has the beneficial effects as follows: pre-objective group and collimation lens set are born the task of producing the parallel beam of injecting TeO2 crystal, the aberration that can exert an influence to light beam performance is corrected, choose H-ZK21, H-ZF12, the optical materials such as H-FK61 are realized apochromatism problem, make the telescopic system second order spectrum of pre-objective group and collimation lens set composition obtain reasonable correction, field stop in Polaroid of pre-objective group is used for eliminating veiling glare, acousto-optic turnable filter is by after a certain wavelength light diffraction in incident directional light, produce zero order light, O light and E light, imaging lens group converges to the O light of diffraction in picture plane, together with the telescopic system that it is formed with pre-objective group and collimation lens set, carry out after aberration correction, make system have good picture element in whole wavelength band and each wavelength place, due to unglazed compensating wedge part, this device has simple in structure and lightweight advantage.
Brief description of the drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is that optical system of the present invention is at all band scope transport function figure;
Fig. 3 is that the present invention is the 0.9 optical system transport function figure of μ m place at wavelength;
Fig. 4 is that the present invention is the 1.3 optical system transport function figure of μ m place at wavelength;
Fig. 5 is that the present invention is the 1.7 optical system transport function figure of μ m place at wavelength.
Wherein each Reference numeral is: 1-pre-objective group, 2-field stop, 3-collimation lens set, 4-acousto-optic turnable filter, 5-imaging lens group, 6-detector, 7-light barrier.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Shown in Fig. 5, the invention discloses a kind of near infrared ultraphotic spectroscopic optics imaging device, comprise and being arranged in same light path, the pre-objective group 1 being arranged in order according to optic path, field stop 2, collimation lens set 3 and near-infrared band acousto-optic turnable filter 4, acousto-optic turnable filter 4 will produce zero order light after a certain wavelength light diffraction in directional light after preposition telescopic system collimation, positive first-order diffraction light O light and negative first-order diffraction E light, the diaphragm of multiple different bores is set in the light path along the transmission of O light, for effectively blocking/reduce the zero order light of transmission, E light and other veiling glares enter the interference to O light in imaging optical path, diaphragm is arranged on the preposition part of diaphragm of imaging system, in order to suppress zero order light and the impact of E light on O light, in the light path along O light transmission along the diaphragm that multiple different bores are set on AB dotted line in Fig. 1, can effectively block the zero order light of transmission, E light and veiling glare enter in imaging optical path, the caliber size of diaphragm only need ensure that O light can unscreenedly pass through in this position.
In the transmission light path of O light, be disposed with imaging lens group 5 and detector 6, imaging lens group 5 will converge on the target surface of detector 6 by the O light after acousto-optic turnable filter 4 diffraction, the transmission light path of zero order light and E light is provided with light barrier 7, use up described system focal length for absorbing by remaining nothing after diaphragm
, pre-objective group 1 focal length
, collimation lens set 3 focal lengths
with imaging lens group 5 focal lengths
meet respectively
with
, that the beam splitter of described acousto-optic turnable filter 4 adopts is acousto-optic crsytal TeO2, positive first-order diffraction O light after TeO2 diffraction and the angle of departure of zero order light are more than or equal to 5.6 °, positive first-order diffraction O light after acousto-optic crsytal TeO2 diffraction is 3 ° along the deflection angle of incident light optical axis direction, the incident light aperture of described TeO2 crystal is 10mm × 10mm, its service band is 0.9 μ m～1.7 μ m, driving frequency scope is 37MHZ～110MHZ, the line width at 1.7 mum wavelength places is less than or equal to 15nm, wave band number is greater than 70, diffraction efficiency is more than or equal to 60%, the clear aperture of described TeO2 is 10mm, focal length is-80mm, operating wavelength range is 0.9 μ m～1.7 μ m, image planes are of a size of 1/3 inch, Pixel size is 30 μ m, the focal length of pre-objective group 1 and collimation lens set 3 is 50mm, visual field is 4.3 °, relative aperture is 1/5, the focal length of imaging lens group 5 is 80mm, relative aperture is 1/8, image planes are of a size of 1/3 inch, Pixel size is 30mm.
Described pre-objective group 1 is undertaken Polaroid by the light sending from target to be measured, it is made up of three groups of four lens, comprise a slice H-FK61 material biconvex lens being arranged in same light path, a slice barium crown diverging meniscus lens, the heavy crown positive meniscus lens of a slice dense flint positive meniscus lens and a slice, wherein barium crown diverging meniscus lens and dense flint positive meniscus lens composition cemented doublet, heavy crown positive meniscus lens is focusing lens, it is moved to 0.9mm toward object space can be to the target blur-free imaging of 5m distance, on Polaroid of pre-objective group 1, field stop 2 is set, can effectively eliminate the impact of parasitic light, the 4th lens in pre-objective group 1 bear focusing task from the nearest lens of image planes, be used for close-in target blur-free imaging, in the time that these sheet lens move 0.9mm toward object space, can be to the target blur-free imaging of 5m distance, and the focal length variations amount of whole system is less than 5%.
Described collimation lens set 3 is collimated into directional light by the light of Polaroid and incides on TeO2 crystal, its outgoing diaphragm is arranged on TeO2 crystal to aberration correction together with pre-objective group 1, it is made up of two groups of four lens, comprise the positive meniscus lens of a slice H-ZK21 material being arranged in same light path, a slice lanthanum flint diverging meniscus lens, the biconcave lens of a slice H-ZF12 material and a slice lanthanum flint biconvex lens, wherein positive meniscus lens and lanthanum flint diverging meniscus lens composition cemented doublet, biconcave lens and lanthanum flint biconvex lens composition cemented doublet, pre-objective group 1 and collimation lens set 3 form the preposition telescopic system of a times, the light that target to be measured is sent is assembled through pre-objective group 1 and collimation lens set 3, after collimation, incide on TeO2 with parallel beam, in order effectively to utilize the bore of acousto-optic crsytal, the aperture diaphragm of preposition telescopic system is arranged on TeO2, make collimation lens set 3 become a diaphragm front-end system.
The incident diaphragm of described imaging lens group 5 is arranged on TeO2 crystal, diaphragm trail is 280mm, together with the preposition telescopic system that it is formed with collimation lens set 3 with pre-objective group 1, carry out aberration correction, ensure at whole service band scope picture element good, it is made up of three groups of four lens, comprise the biconvex lens of a slice H-FK61 material being arranged in same light path, a slice barium crown positive meniscus lens and a slice dense flint diverging meniscus lens and a slice lanthanum flint positive meniscus lens, wherein barium crown positive meniscus lens and dense flint diverging meniscus lens composition cemented doublet, imaging lens group 5 converges to O light in picture plane, for by O light, zero order light and E light separate completely, the same diaphragm front-end system that adopts of imaging lens group 5 of rear end, the trail of its diaphragm obtains according to diffraction dissociation angle and the deflection angle calculation of parameter of acousto-optic turnable filter 4, described tunable optical filter 4 has adopted the method that suppresses diffraction light drift, without the image drift of establishing wedge at its outgoing end face and can repair O light, eliminate the image drift causing due to crystalline dispersion.
The pre-objective group 1 of apparatus of the present invention and collimation lens set 3 are born the task of producing the parallel beam of injecting TeO2 crystal, the aberration that can exert an influence to light beam performance is corrected, choose H-ZK21, H-ZF12, the optical materials such as H-FK61 are realized apochromatism problem, the telescopic system second order spectrum that pre-objective group 1 and collimation lens set 3 are formed obtains reasonable correction, field stop 2 in Polaroid of pre-objective group 1 is for eliminating veiling glare, acousto-optic turnable filter 4 is by after a certain wavelength light diffraction in incident directional light, produce zero order light, O light and E light, imaging lens group converges to the O light of diffraction in picture plane, it is carried out after aberration correction together with telescopic system that collimation lens set 3 forms with pre-objective group 1, make system have good picture element in whole wavelength band and each wavelength place, due to unglazed compensating wedge part, this device has simple in structure and lightweight advantage
Above-described embodiment is illustrative principle of the present invention and effect thereof only; and the embodiment of part utilization, for the person of ordinary skill of the art, without departing from the concept of the premise of the invention; can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (7)
1. a near infrared ultraphotic spectroscopic optics imaging device, it is characterized in that: comprise and be arranged on pre-objective group (1) in same light path, field stop (2), collimation lens set (3) and near-infrared band acousto-optic turnable filter (4), in the transmission light path of the positive first-order diffraction O light after acousto-optic turnable filter (4) diffraction, be disposed with imaging lens group (5) and detector (6), negative first-order diffraction E light after acousto-optic turnable filter (4) diffraction and the transmission light path of zero order light are provided with light barrier (7), described system focal length
, pre-objective group (1) focal length
, collimation lens set (3) focal length
and imaging lens group (5) focal length
meet respectively:
。
2. a kind of near infrared ultraphotic spectroscopic optics imaging device according to claim 1, it is characterized in that, described pre-objective group (1) comprises the heavy crown positive meniscus lens of a slice H-FK61 material biconvex lens, a slice barium crown diverging meniscus lens, a slice dense flint positive meniscus lens and a slice of being arranged in same light path, wherein barium crown diverging meniscus lens and dense flint positive meniscus lens composition cemented doublet.
3. a kind of near infrared ultraphotic spectroscopic optics imaging device according to claim 1, it is characterized in that, described collimation lens set (3) comprises a slice H-ZK21 material positive meniscus lens, a slice lanthanum flint diverging meniscus lens, a slice H-ZF12 material biconcave lens and a slice lanthanum flint biconvex lens that are arranged in same light path, wherein positive meniscus lens and lanthanum flint diverging meniscus lens composition cemented doublet, biconcave lens and lanthanum flint biconvex lens composition cemented doublet.
4. a kind of near infrared ultraphotic spectroscopic optics imaging device according to claim 1, it is characterized in that, described imaging lens group (5) comprises a slice H-FK61 material biconvex lens, a slice barium crown positive meniscus lens and a slice dense flint diverging meniscus lens and a slice lanthanum flint positive meniscus lens that are arranged in same light path, wherein barium crown positive meniscus lens and dense flint diverging meniscus lens composition cemented doublet.
5. according to a kind of near infrared ultraphotic spectroscopic optics imaging device described in claim 1 or 2 or 3 or 4, it is characterized in that, that the beam splitter of described acousto-optic turnable filter (4) adopts is acousto-optic crsytal TeO2, positive first-order diffraction O light after TeO2 diffraction and the angle of departure of zero order light are more than or equal to 5.6 °, and the positive first-order diffraction O light after acousto-optic crsytal TeO2 diffraction is 3 ° along the deflection angle of incident light optical axis direction.
6. a kind of near infrared ultraphotic spectroscopic optics imaging device according to claim 5, it is characterized in that, the incident light aperture of described TeO2 crystal is 10mm × 10mm, its service band is 0.9 μ m～1.7 μ m, driving frequency scope is 37MHZ～110MHZ, the line width at 1.7 mum wavelength places is less than or equal to 15nm, wave band number is greater than 70, diffraction efficiency is more than or equal to 60%, the clear aperture of described TeO2 is 10mm, and focal length is-80mm that operating wavelength range is 0.9 μ m～1.7 μ m, image planes are of a size of 1/3 inch, and Pixel size is 30 μ m.
7. a kind of near infrared ultraphotic spectroscopic optics imaging device according to claim 6, it is characterized in that, the focal length of described pre-objective group (1) and collimation lens set (3) is 50mm, visual field is 4.3 °, relative aperture is 1/5, the focal length of described imaging lens group (5) is 80mm, and relative aperture is 1/8.
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| CN201410205930.0A CN103995342B (en) | 2014-05-15 | A kind of near-infrared ultraphotic spectroscopic optics imaging device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410205930.0A CN103995342B (en) | 2014-05-15 | A kind of near-infrared ultraphotic spectroscopic optics imaging device |
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| CN103995342A true CN103995342A (en) | 2014-08-20 |
| CN103995342B CN103995342B (en) | 2016-11-30 |
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| CN105181638A (en) * | 2015-09-16 | 2015-12-23 | 湖北久之洋红外***股份有限公司 | Infrared spilling oil monitoring device and monitoring method thereof |
| CN106482731A (en) * | 2016-09-29 | 2017-03-08 | 华中光电技术研究所（中国船舶重工集团公司第七七研究所） | Star sensor and using method are surveyed in a kind of big visual field of suppression atmospheric turbulence effect on daytime |
| CN106840615A (en) * | 2017-03-24 | 2017-06-13 | 中国工程物理研究院应用电子学研究所 | A kind of pupil on-line measurement device and calibration method based on imaging conjugate |
| CN107260123A (en) * | 2017-06-09 | 2017-10-20 | 苏州大学 | A kind of mobile phone external fundus imaging camera lens and eye fundus image acquisition methods |
| CN110460757A (en) * | 2019-08-16 | 2019-11-15 | 广州星博科仪有限公司 | A kind of integrated spectrum pick-up lens and spectrum camera |
| CN111077664A (en) * | 2019-12-13 | 2020-04-28 | 中国科学院西安光学精密机械研究所 | Visible light-medium wave infrared integrated optical lens |
| CN111919097A (en) * | 2019-09-04 | 2020-11-10 | 深圳市海谱纳米光学科技有限公司 | Optical lens and optical equipment |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105181638A (en) * | 2015-09-16 | 2015-12-23 | 湖北久之洋红外***股份有限公司 | Infrared spilling oil monitoring device and monitoring method thereof |
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| CN106482731A (en) * | 2016-09-29 | 2017-03-08 | 华中光电技术研究所（中国船舶重工集团公司第七七研究所） | Star sensor and using method are surveyed in a kind of big visual field of suppression atmospheric turbulence effect on daytime |
| CN106840615A (en) * | 2017-03-24 | 2017-06-13 | 中国工程物理研究院应用电子学研究所 | A kind of pupil on-line measurement device and calibration method based on imaging conjugate |
| CN107260123A (en) * | 2017-06-09 | 2017-10-20 | 苏州大学 | A kind of mobile phone external fundus imaging camera lens and eye fundus image acquisition methods |
| CN107260123B (en) * | 2017-06-09 | 2020-09-18 | 苏州大学 | Mobile phone external eye ground imaging lens and eye ground image acquisition method |
| CN110460757A (en) * | 2019-08-16 | 2019-11-15 | 广州星博科仪有限公司 | A kind of integrated spectrum pick-up lens and spectrum camera |
| CN111919097A (en) * | 2019-09-04 | 2020-11-10 | 深圳市海谱纳米光学科技有限公司 | Optical lens and optical equipment |
| WO2021042306A1 (en) * | 2019-09-04 | 2021-03-11 | 深圳市海谱纳米光学科技有限公司 | Optical lens and optical device |
| CN111919097B (en) * | 2019-09-04 | 2022-08-05 | 深圳市海谱纳米光学科技有限公司 | Optical lens and optical equipment |
| CN111077664A (en) * | 2019-12-13 | 2020-04-28 | 中国科学院西安光学精密机械研究所 | Visible light-medium wave infrared integrated optical lens |
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Effective date of registration: 20230704 Address after: No. 2 Scientific Research Building, No. 717, Yangguang Avenue, Jiangxia District, Wuhan City, Hubei Province, 430223 Patentee after: Wuhan Huazhong Kuangteng Optical Technology Co.,Ltd. Address before: 430223 717 Sunshine Avenue, Jiangxia District, Wuhan, Hubei. Patentee before: NO. 717 RESEARCH INSTITUTE OF CHINA SHIPBUILDING INDUSTRY Corp. |
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