CN102096211B - AOTF optical system with image drift compensation - Google Patents
AOTF optical system with image drift compensation Download PDFInfo
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- CN102096211B CN102096211B CN 200910219429 CN200910219429A CN102096211B CN 102096211 B CN102096211 B CN 102096211B CN 200910219429 CN200910219429 CN 200910219429 CN 200910219429 A CN200910219429 A CN 200910219429A CN 102096211 B CN102096211 B CN 102096211B
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Abstract
The invention relates to an acousto-optic tunable filter (AOTF) optical system with image drift compensation. The system comprises an objective lens, an ocular lens and a TEO2 crystal which are positioned in the direction of an optical path, a +1 level optical path and a -1 level optical path on which a radio frequency signal is added to an energy converter, an acoustic wave is excited and transmitted to the TEO2 crystal, and the wave with the wavelength meeting the acousto-optic interaction condition is subjected to Bragg diffraction, and is diffracted from the TEO2 crystal at a certain diffraction angle, collecting lenses which are positioned on the +1 level optical path and the -1 level optical path, and combined optical wedges which are positioned at the front ends of the collecting lenses and can correct diffraction optical drift outside the TEO2 crystal before the +1 level optical path and the -1 level optical path enter the collecting lenses. The characteristics of non-collinear AOTF all-solid parts are completely realized, and the technical problem of the image drift compensation is well solved.
Description
Technical field
The present invention relates to a kind of AOTF optical system, be specifically related to a kind of non-colinear acousto-optic tunable filter AOTF optical system with image drift compensation.
Background technology
Non-colinear type acousto-optic tunable filter light-dividing principle:
As shown in Figure 1, radio-frequency (RF) driving signal is converted into the ultrasonic signal of corresponding frequencies after by electroacoustics transducer, by forming diffraction grating after the single axial birefringence crystal, is absorbed device at the other end and absorbs.
After white light incident single axial birefringence crystal, meet the wavelength components generation Bragg diffraction of acoustic optic interaction condition, and all the other wavelength components are constant.Due to the birefringence effect of crystal, diffraction light is divided into two bundles, namely+1 grade and-1 order diffraction light, and non-diffracted light is defined as 0 grade, and the relative position of emergent lights at different levels is as shown in Figure 1.
The optical wavelength that occurs to export after diffraction determined by ultrasonic frequency, and ultrasonic frequency and light wave number are linear relationship.Non-colinear acousto-optic tunable filter AOTF can be tuned as a narrow wave band to the broadband light beam, so imaging only occurs in specific wave band.But, during non-colinear acousto-optic tunable filter AOTF wavelength tuning, angle of diffraction can change with the variation of wavelength, causes the image generation relativity shift of same target different spectral coverage, thereby can not effectively utilize each pixel of area array CCD and affect data cube reconstruct.
Because the intrinsic dispersion of acousto-optic crsytal causes the diffraction light drift, can cause the drift phenomenon of image in imaging, this causes very large obstacle to imaging applications.The angle of wedge compensation that adds angle of wedge compensation at TEO2 crystal exit facet of reporting in previous literature all can only compensate one the tunnel, can only be applicable to the situation of polarized light incident, and it is the scheme that adopts rotary plane reflecting mirror.Method in this paper is compared with the scheme that adopted rotary plane reflecting mirror in the past, has realized the characteristic of non-colinear acousto-optic tunable filter AOTF total solids parts fully.
Summary of the invention
The object of the present invention is to provide a kind of AOTF optical system with image drift compensation, the characteristic that it has realized non-colinear acousto-optic tunable filter AOTF total solids parts has fully solved the technical matters of image drift compensation preferably.
Technical solution of the present invention is:
A kind of AOTF optical system with image drift compensation, comprise the object lens that are positioned on optical path direction, eyepiece, the TEO2 crystal, through radiofrequency signal be added to motivate sound wave on transducer and inject wavelength generation Bragg diffraction that the TEO2 crystal satisfies the acoustic optic interaction condition from the TEO2 crystal and with certain angle of diffraction diffraction out+1 grade of light path and-1 grade of light path, be positioned at+collection mirror on 1 grade of light path and-1 grade of light path
Its special character is: comprise that also described+1 grade light path and-1 grade of light path enter collection mirror anteposition in the combination wedge that can proofread and correct the diffraction light drift outside the TEO2 crystal of collecting the mirror front end.
The combinations thereof wedge is that two common wedge shape optical glass bondings form.
Above-mentioned object lens and eyepiece form one without the focus collimation system; The directional light that comes when the infinite distance enters object lens, through outgoing directional light after eyepiece.
Above-mentioned by adding the combination wedge in+1 grade of light path and-1 grade of light path, can realize that image drift is in a pixel in visible light arrives near infrared service band scope.
Above-mentioned collection mirror comprises the CCD focal plane, and whole optical system imaging is on the CCD focal plane.
The invention has the advantages that:
Add the combination wedge by reaching in-1 order diffraction light path at+1 grade, can realize that image drift is in a pixel in visible light arrives near infrared service band scope.Highly beneficial for the image acquisition registration identification in later stage like this, do not need to adjust CCD and receive image, and also can obtain simultaneously the polarization image of two orthogonal directionss of same target.
Description of drawings
Fig. 1 is non-colinear type acousto-optic tunable filter light-dividing principle figure;
Fig. 2 is optical system structure schematic diagram of the present invention;
Fig. 3 is combination wedge structural representation.
The drawing reference numeral explanation: the 1-object lens, the 2-eyepiece, the 3-TEO2 crystal, 4-+1 level light path, 5--1 level light path, 6-collects mirror, and 7-makes up wedge.
Embodiment
Referring to Fig. 2, a kind of AOTF optical system with image drift compensation, comprise the object lens 1 that are positioned on optical path direction, eyepiece 2, the TEO2 crystal 3, through radiofrequency signal be added to motivate sound wave on transducer and inject wavelength generation Bragg diffraction that the TEO2 crystal 3 satisfies the acoustic optic interaction condition from the TEO2 crystal 3 and with certain angle of diffraction diffraction out+1 grade of light path 4 and-1 grade of light path 5, be positioned at+collection mirror 6 on 1 grade of light path 4 and-1 grade of light path 5.
Before comprising that also described+1 grade light path 4 and-1 grade of light path 5 enter collection mirror 6, be positioned at the combination wedge 7 that can proofread and correct the outer diffraction light drift of TEO2 crystal 3 of collecting mirror 6 front ends.
The diffraction light that we proofread and correct the TEO2 crystal 3 outside by the method that adds respectively the appropriate combination wedge in+1 grade of light path 4 and-1 grade of light path 5 drifts about.
The method according to this invention, designed a kind of total solids parts and also obtained simultaneously the optical system device of two cross polarization light images: the directional light that the infinite distance is come enters telescopical object lens 1, through outgoing directional light after eyepiece 2, in other words the system of front be one without the focus collimation system.The aperture diaphragm of system is arranged in object lens 1 systems, by object lens 1 and eyepiece 2, the picture of aperture diaphragm is become centre at the TEO2 crystal 3.Directional light enters when radiofrequency signal is added on transducer simultaneously after the TEO2 crystal 3, motivate sound wave and inject the TEO2 crystal 3, at this moment the wavelength generation Bragg diffraction that satisfies the acoustic optic interaction condition from the TEO2 crystal 3 and with certain angle of diffraction diffraction out, through the combination wedge by imaging on the CCD focal plane by collecting mirror 6.
The combination wedge is illustrated in fig. 3 shown below, and adopts two common wedge shape optical glass bondings to form, and adopts common optical glass to make up to proofread and correct by the intrinsic dispersion of TEO2 crystal 3 and causes the image drift that the high-order drift dispersion of diffraction light causes.
Add the combination wedge by reaching 5 li of-1 grade of light paths in+1 grade of light path 4, can realize that image drift is in a pixel in visible light arrives near infrared service band scope.Highly beneficial for the image acquisition registration identification in later stage like this, do not need to adjust CCD and receive image, and also can obtain simultaneously the polarization image of two orthogonal directionss of same target.
Claims (5)
1. one kind has the AOTF optical system that image drift compensates, comprise the object lens that are positioned on optical path direction, (1), eyepiece, (2), the TEO2 crystal, (3), be added to through radiofrequency signal and motivate sound wave on transducer and inject the TEO2 crystal, (3), satisfy the wavelength generation Bragg diffraction of acoustic optic interaction condition, from the TEO2 crystal, (3) in and with certain angle of diffraction diffraction out+1 grade of light path, (4) and-1 grade of light path, (5), be positioned at+1 grade of light path, (4) and-1 grade of light path, (5) the collection mirror on, (6)
It is characterized in that: comprise that also described+1 grade light path (4) and-1 grade of light path (5) enter collection mirror (6) front, be positioned at the combination wedge (7) that can proofread and correct the outer diffraction light drift of TEO2 crystal (3) of collecting mirror (6) front end.
2. have according to claim 1 the AOTF optical system of image drift compensation, it is characterized in that: described combination wedge (7) is that two common wedge shape optical glass bondings form.
3. described AOTF optical system with image drift compensation according to claim 1 and 2, it is characterized in that: described object lens (1) form one without the focus collimation system with eyepiece (2); The directional light that comes when the infinite distance enters object lens (1), through outgoing directional light after eyepiece (2).
4. the AOTF optical system that has according to claim 3 the image drift compensation, it is characterized in that: described by+1 grade of light path (4) and the inner combination wedge that adds of-1 grade of light path (5), can realize that image drift is in a pixel in visible light arrives near infrared service band scope.
5. have according to claim 4 the AOTF optical system of image drift compensation, it is characterized in that: described collection mirror (6) comprises the CCD focal plane, and whole optical system imaging is on the CCD focal plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910219429 CN102096211B (en) | 2009-12-10 | 2009-12-10 | AOTF optical system with image drift compensation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910219429 CN102096211B (en) | 2009-12-10 | 2009-12-10 | AOTF optical system with image drift compensation |
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| Publication Number | Publication Date |
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| CN102096211A CN102096211A (en) | 2011-06-15 |
| CN102096211B true CN102096211B (en) | 2013-06-05 |
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| CN 200910219429 Expired - Fee Related CN102096211B (en) | 2009-12-10 | 2009-12-10 | AOTF optical system with image drift compensation |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104931138A (en) * | 2015-07-13 | 2015-09-23 | 中北大学 | Method of using prism to increase AOTF spectrum imaging quality and apparatus thereof |
| CN109782428A (en) * | 2018-11-30 | 2019-05-21 | 中国科学院上海药物研究所 | Biological unit imaging system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1300950A (en) * | 1999-11-05 | 2001-06-27 | Jds尤尼费斯公司 | Adjustable chromatic dispersion compensator |
| CN1366200A (en) * | 2001-01-16 | 2002-08-28 | 财团法人工业技术研究院 | Polarization-independent regualtable acousto-optic filter and its method |
| CN201681208U (en) * | 2009-12-10 | 2010-12-22 | 中国科学院西安光学精密机械研究所 | AOTF optical system with function of image drift compensation |
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2009
- 2009-12-10 CN CN 200910219429 patent/CN102096211B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1300950A (en) * | 1999-11-05 | 2001-06-27 | Jds尤尼费斯公司 | Adjustable chromatic dispersion compensator |
| CN1366200A (en) * | 2001-01-16 | 2002-08-28 | 财团法人工业技术研究院 | Polarization-independent regualtable acousto-optic filter and its method |
| CN201681208U (en) * | 2009-12-10 | 2010-12-22 | 中国科学院西安光学精密机械研究所 | AOTF optical system with function of image drift compensation |
Non-Patent Citations (2)
| Title |
|---|
| 常凌颖 等.声光可调谐滤波器（AOTF）消色散设计.《光子学报》.2009,第38卷(第11期),2895-2899. * |
| 李庆波 等.声光可调谐滤波器分光系统光学特性的研究.《中国激光》.2003,第30卷(第4期),329-333. * |
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