CN2419588Y - Polarization interference image spectrometer - Google Patents

Polarization interference image spectrometer Download PDF

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Publication number
CN2419588Y
CN2419588Y CN 99256129 CN99256129U CN2419588Y CN 2419588 Y CN2419588 Y CN 2419588Y CN 99256129 CN99256129 CN 99256129 CN 99256129 U CN99256129 U CN 99256129U CN 2419588 Y CN2419588 Y CN 2419588Y
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polarization type
interferometer
imaging spectrometer
birefringent
according
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CN 99256129
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Chinese (zh)
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相里斌
杨建峰
阮萍
张淳民
王炜
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中国科学院西安光学精密机械研究所
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Abstract

The utility model discloses a polarization interference imaging spectrometer, which is composed of a pre-processor optical assembly, robot scaling equipment, a polarization type lateral shearing interferometer, an optical imaging assembly, a detector and a signal acquiring and handling system, wherein pre-processor optical assembly is composed of a pre-processor object glass and a collimating mirror. A field diaphragm is arranged at the back focal plane of the pre-processor object glass. The switching mirror of the robot scaling equipment is arranged between the pre-processor optical assembly and the polarization type lateral shearing interferometer. The polarization type lateral shearing interferometer is composed of a polarizer, two blocks of birefringent prisms and an analyzer, and the crystal axis directions of the two birefringent prisms are mutually perpendicular.

Description

偏振型干涉成像光谱仪 Polarization type interferometer imaging spectrometer

本实用新型属于光学仪器技术领域,涉及一种干涉成像光谱仪,特别是一种偏振型干涉成像光谱仪。 The present invention belongs to the technical field of optical instruments, it relates to an imaging spectrometer interferometer, in particular a polarization type interferometer imaging spectrometer.

近年来,随着偏振型干涉成像光谱技术的不断进步,与该技术相关的设备也逐渐更新,但现有的相关设备其能量通量、光谱通道等方面仍有改进的必要。 In recent years, with advances in imaging spectroscopy polarization type interferometer is associated with the device gradually updated art, aspects of the existing energy flux associated equipment, spectral channels is still need for improvement and the like.

本实用新型的目的在于提供一种偏振型干涉成像光谱仪,该光谱仪具有高能量通量、多光谱通道、高信噪比、高稳定性、结构简单的特点。 The present invention aims to provide a polarization type interferometer imaging spectrometer, the spectrometer having a high energy flux, multiple spectral channels, high signal to noise ratio, high stability, and simple structure.

本实用新型的任务是通过下述方式完成的,一种偏振型干涉成像光谱仪,由偏振型横向剪切干涉仪、光学成像组件、探测器、信号获取与处理系统构成,其关键是偏振型横向剪切干涉仪由起偏器,一组双折射棱镜以及检偏器组成。 This new task is practically accomplished in the following manner, one polarization type interferometer imaging spectrometer, acquired by the polarization type lateral shearing interferometer, the optical imaging assembly, detector, and a signal processing system configuration, the key is a transverse polarization type shearing interferometer by the polarizer, the birefringent prism and a set of the analyzer components.

偏振型横向剪切干涉仪的作用是将目标辐射沿垂直于光轴方向剪切为有一定间距的两束相干光,他们的强度相同或相似,在光学成像组件的后焦面处发生干涉。 Lateral shearing action polarization type interferometer is to target the radiation in the vertical shear that there is a spacing of two coherent light beams in the optical axis direction, the same as or similar to their strength, interference occurs in the back focal plane of the optical imaging assembly. 晶体材料的厚度不同,一根光线经过偏振干涉仪后分开的距离(称为剪切量)不同。 Different thickness of the crystal material, a light through the polarization separating from the interferometer (referred to the amount of shear) different. 晶体材料越厚,剪切量越小,反之,晶体材料越薄,剪切量就越大。 Thicker crystalline material, the smaller the amount of shear, conversely, the thinner the crystalline material, the greater the amount of shear.

上述一组双折射棱镜可以选用以下任一方案制成:A. Said set of birefringent prisms may choose one of these options is made: A. 两块双折射棱镜同为正晶体,B. Two birefringent crystal prism with a positive, B. 两块双折射棱镜同为负晶体,C. Two negative birefringent crystal prism with, C. 两块双折射棱镜中的一块为正晶体,而另一块为负晶体, Two birefringent prisms of a crystal is positive, while the other crystal is negative,

同时两块双折射棱镜的晶轴方向互相垂直。 While the two birefringent crystal prism is perpendicular to the axial direction.

也就是说,偏振型横向剪切干涉仪由四个部件组成,即:起偏器,两块双折射棱镜和检偏器。 That is, the polarization type lateral shearing interferometer consists of four components, namely: a polarizer, two birefringent prism and an analyzer. 所述的两块双折射棱镜可以选用同一种材料(同为正晶体,或者同为负晶体),也可以是一块正晶体,一块负晶体,上述两块双折射棱镜的晶轴方向要互相垂直。 It said two birefringent prisms can use the same material (both positive crystals, or crystals with negative), the crystal may be a positive, a negative crystal, the crystal axis direction of the birefringent prism to two mutually perpendicular .

所述探测器可以选用CCD面阵探测器,该CCD面阵探测器在推扫方式工作时,能够获得目标的两维空间和一维光谱信息。 The detector may be selected CCD area array detector, the CCD area array detector working at the push-broom mode, the target can be obtained in two-dimensional space and the one-dimensional spectral information.

所述信号获取与处理系统可以采用普通微机,再加上专用电路板制成,它把从探测器获取的干涉图信号放大以后转化为数字信号并进行处理,最终得到目标的光谱信息和图像信息。 The signal acquisition and processing system can use ordinary computer, coupled with the specific circuit board is made, it acquires the interferogram signal from the detector into a digital signal after amplification and treatment, and the finally obtained spectrum information to the image information of the target .

在偏振型横向剪切干涉仪的前方最好增设前置光学组件,该前置光学组件可以由前置物镜和准直镜两部分组成,它将目标发出的辐射进行收集、准直并减小杂散光。 Polarization type in front of the lateral shearing interferometer optical assembly is preferably pre-addition of the pre-optic component may be composed by the front objective lens and a collimator lens in two parts, the radiation emitted from the target will be collected, collimated and reduced stray light.

前置光学组件具有将目标发出的辐射进行收集、准直和减小杂散光等作用,其结构可采用折射、折反射和反射等多种形式。 Pre-assembly having the optical radiation emitted by the target is collected, collimated, and the like to reduce the effect of stray light, the structure can be refractive, reflective, and catadioptric other forms. 由于仪器要求准直光进入到下一部分,如果从前置光学组件出射的光束不是准直光,会影响复原光谱的准确性,所以将目标的辐射转变为准直光是前置光学组件的主要目的。 As the instrument requires collimated light enters the next section, from the front light beam exiting the optical component is not collimated light, restored spectra will affect the accuracy, so that the radiation is mainly linear transition destination, whichever pre-optic light assembly purpose. 当整个系统的光能量不足时,加大前置光学组件的入瞳直径,可以增大进入光学系统能量数倍,此时,前置光学组件中可以加入合适的光阑,以便有效地抑制系统的杂散光。 When insufficient light energy of the entire system, to increase the pre-entrance pupil diameter of the optical assembly, the energy entering the optical system can be increased several times, this time, the optical assembly may be pre-addition of a suitable stop, in order to effectively suppress the system the stray light.

在没有设置前置光学组件的情况下,要充分考虑光学系统的杂散光抑制问题,通常可以通过加上一个外遮光罩的技术措施加以解决。 In the absence of pre-set optical assembly, the optical system to fully consider the stray light rejection problem often can be solved by adding an outer hood technical measures.

在本偏振型干涉成像光谱仪的结构组成内,还可以增设一个定标装置,定标光路由切换镜导入,在无前置光学组件的情况下,切换镜设置在偏振型横向剪切干涉仪的前方,而在设置有前置光学组件的情况下,切换镜设置在前置光学组件以及偏振型横向剪切干涉仪之间,该切换镜将目标辐射进行切换,定标装置在进行定标时,目标辐射的主光路不能进入后续的偏振型横向剪切干涉仪,所述定标装置用于对整个仪器系统的光谱响应和辐射度响应进行标定。 Structures present in the polarization type interferometer in the imaging spectrometer can also be an additional scaling means scaling introduced optical path switching mirror, in the absence of pre-optic assembly, the polarization type switching mirror disposed lateral shearing interferometer in front of, and in front of the optical assembly is provided with a case, the switching mirror is provided between the optical component and a polarization type front lateral shearing interferometer, the switching mirror radiation handover target, when performing the scaling means scaling , the main light path of the target can not enter the subsequent radiation polarization type lateral shearing interferometer, means for scaling the spectral response of the whole instrument and the radiation response of the system calibration.

光学成像组件将剪切后的目标辐射收集到位于其像面的探测器上,辐射于此处发生干涉,干涉条纹方向与偏振型横向剪切干涉仪的剪切方向垂直,干涉光程差与剪切量、探测器有效尺寸成正比,与光学成像组件焦距成反比。 The optical imaging assembly after shearing the target radiation collector in place on the detector plane of the image thereon, where the radiation to interfere, the interference fringes shear direction transverse direction of the polarization type of the vertical shearing interferometer, and the interference optical path difference the amount of shear is proportional to the effective size of the detector, is inversely proportional to the focal length of the optical imaging assembly. 光程差越大,光谱分辨率越高。 Optical path difference, the higher the spectral resolution.

探测器是干涉信号的接收器,探测器可以使用面阵探测器,在推扫方式工作时,能够获得目标的两维空间和一维光谱信息。 The interference signal detector is a receiver, the detector plane array detector may be used in push-broom mode when working, it is possible to obtain two-dimensional space and a certain dimensional spectral information.

信号获取与处理系统把从探测器获取的干涉图信号进行数字化,并进行处理,最终得到目标的光谱信息和图像信息。 Signal acquisition and processing system for the interferogram obtained from the detector signals digitized and processed to finally obtain spectral information and image information of the object.

定标装置的主要功能是对整个仪器系统的光谱响应和辐射度响应进行标定,有光谱响应度定标、辐射度定标以及相对定标和绝对定标之分。 The main function of the scaling means and the spectral response of the radiation response of the entire system, calibration of the instrument, spectral response with a calibration, calibration of the radiation and the relative and absolute calibration of the calibration points. 光谱定标的目的是获取实物的真实光谱图。 The purpose is to obtain spectral calibration kind of real spectra.

本实用新型提出的偏振型干涉成像光谱仪的能量利用率高于一般色散型成像光谱仪的能量利用率。 Polarization type interferometer in the imaging spectrometer according to the present invention, the energy efficiency is generally higher than that proposed by dispersive imaging spectrometer energy efficiency. 一般色散型成像光谱仪是把从目标来的辐射按照波长的长短散布在探测器的一个条带上,如果光谱仪的光谱分辨率为100,则目标的辐射要按照波长从短到长分散到100个探测器单元上,每个探测器单元上接收的能量的平均值是普通照相机的百分之一。 Usually dispersive imaging spectrometer in accordance with the length of the wavelength of the radiation scattered from the target to the detector in a strip tape, if the spectral resolution of the spectrometer 100, in accordance with the radiation of the target from short to long wavelength dispersion to 100 the detector unit, the average value of the energy received at each detector cell is one percent of a normal camera. 而本实用新型描述的偏振型干涉成像光谱仪在像面上的照度与相同孔径照相机像面照度在一个量级。 The present invention described in the polarization type interferometer in the imaging spectrometer illuminance same camera aperture image plane illuminance at the image plane an order of magnitude.

可见,本实用新型所提供的偏振型干涉成像光谱仪能提供一定光谱范围内的多张单色图像。 Be seen, the present invention provides the novel polarization type interferometer imaging spectrometer provides a plurality of monochrome image in a certain spectral range. 获得一定光谱范围内的任意一个极窄波段内的完整图像,供使用者进行分析处理。 Complete image within an arbitrary range within a spectrum to obtain a certain very narrow band for a user to perform analysis processing.

下面结合实施例所示附图对本实用新型作进一步详细说明。 DRAWINGS detailed description of embodiments of the present invention as illustrated further.

图1为偏振型干涉成像光谱仪的整体结构示意图;图2为偏振型横向剪切干涉仪内部组件的配合示意图。 1 is a schematic overall configuration of a polarization type interferometer in the imaging spectrometer; FIG. 2 is a schematic view with lateral shearing interferometer polarization type internal components.

参照图1,偏振型干涉成像光谱仪由前置光学组件1、偏振型横向剪切干涉仪2、光学成像组件3、探测器4构成。 Referring to Figure 1, polarization type interferometer optical imaging spectrometer by the front module 1, the lateral shearing interferometer polarization type 2, the optical imaging assembly 3, the detector 4.

从图1中可以看出,前置光学组件1两端分别为前置镜11和准直镜12,其近中央位置设有视场光阑13,前置镜11位于前置镜镜筒14的前端,准直镜12位于准直镜镜筒15的后端,调焦机构16设置在前置镜镜筒14的外周,光学成像组件3由固定件31固定在偏振型横向剪切干涉仪2的后部。 As can be seen from Figure 1, both ends of a front optical assembly respectively front mirror 11 and the collimator lens 12, which is provided with a position near the center of the field diaphragm 13, a mirror 11 is located in front of the lens barrel 14 front mirror front end, the collimator lens 12 at the rear end of the collimator lens barrel 15, the focusing mechanism 16 is provided on the outer periphery of the front lens barrel 14, the optical imaging assembly 3 by a fixing member 31 fixed to the lateral shearing interferometer type polarization rear 2.

结合图2,偏振型横向剪切干涉仪2由起偏器21,两块双折射棱镜22和23以及检偏器24组成,两块双折射棱镜22和23的晶轴方向互相垂直。 In conjunction with FIG. 2, the lateral shearing interferometer polarization type 2 by the polarizer 21, the two birefringent prism 22 and the analyzer 23 and the composition 24, two birefringent crystal prism 23 and the shaft 22 in the direction perpendicular to each other.

Claims (8)

  1. 1. 1. 一种偏振型干涉成像光谱仪,前端设置有偏振型横向剪切干涉仪,之后为光学成像组件,再之后为探测器、并有信号获取与处理系统连接于探测器,其特征是所述的偏振型横向剪切干涉仪的结构为,前端设置起偏器,中间为一组双折射棱镜,末端为检偏器;其中一组双折射棱镜为两块晶轴方向互相垂直的双折射棱镜。 A polarization interferometer imaging spectrometer, the distal end is provided with a lateral shearing interferometer polarization type, followed by the optical imaging assembly, and then followed by the detector, and the signal acquisition and processing system connected to the detector, characterized in that said polarization structural lateral shearing interferometer is a front end disposed polarizer, the middle of a group of birefringent prisms, the analyzer terminus; a group wherein two birefringent crystal prisms are mutually perpendicular axis birefringent prism.
  2. 2.根据权利要求1规定的偏振型干涉成像光谱仪,其特征是所述一组双折射棱镜选用以下任一方案制成:A. 2.1 predetermined polarization type interferometer according to claim imaging spectrometer, wherein said selected set of birefringent prisms made of any of the following schemes: A. 两块双折射棱镜同为正晶体,B. Two birefringent crystal prism with a positive, B. 两块双折射棱镜同为负晶体,C. Two negative birefringent crystal prism with, C. 两块双折射棱镜中的一块为正晶体,而另一块为负晶体。 Two birefringent prisms of a crystal is positive, one negative and the other crystals.
  3. 3.根据权利要求2规定的偏振型干涉成像光谱仪,其特征是所述光学成像组件为一块凸透镜,所述探测器选用面阵探测器,所述信号获取与处理系统由普通微机,再加上专用电路板制成。 3. polarization type interferometer predetermined imaging spectrometer according to claim 2, characterized in that the optical imaging assembly is a lens, the choice of the detector plane array detector, the signal acquisition and processing system comprises an ordinary microcomputer, plus made specific circuit board.
  4. 4.根据权利要求1、2或3规定的偏振型干涉成像光谱仪,其特征是在偏振型横向剪切干涉仪的前方设置有前置光学组件。 According to claim 1, 2 or 3 predetermined polarization type interferometer imaging spectrometer, wherein the polarization type in front of the lateral shearing interferometer is provided with a front optical assembly.
  5. 5.根据权利要求4规定的偏振型干涉成像光谱仪,其特征是所述前置光学组件中增设有光阑。 5.4 predetermined polarization type interferometer according to claim imaging spectrometer, wherein said front optical assemblies have additional stop.
  6. 6.根据权利要求1、2或3规定的偏振型干涉成像光谱仪,其特征是它还具有一个定标装置。 According to claim 1, 2 or 3 predetermined polarization type interferometer imaging spectrometer, which is further characterized in having a given standard means.
  7. 7.根据权利要求4规定的偏振型干涉成像光谱仪,其特征是它还具有一个定标装置。 7.4 predetermined polarization type interferometer according to claim imaging spectrometer, which is further characterized in having a given standard means.
  8. 8.根据权利要求5规定的偏振型干涉成像光谱仪,其特征是它还具有一个定标装置。 According to claim polarization type interferometer predetermined imaging spectrometer 5, characterized in that the apparatus further having a given standard.
CN 99256129 1999-12-28 1999-12-28 Polarization interference image spectrometer CN2419588Y (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100478832C (en) 2004-08-19 2009-04-15 富士通株式会社 Casing structure and electronic equipment having the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100478832C (en) 2004-08-19 2009-04-15 富士通株式会社 Casing structure and electronic equipment having the same

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