Miniature snapshot imaging spectrometer and imaging method thereof

An imaging spectrometer and snapshot technology, which is applied in the directions of interference spectroscopy, spectrometry/spectrophotometry/monochromator, instruments, etc. The effect of being easy to carry and reducing the overall volume of the structure

Inactive Publication Date: 2018-08-24
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Although the system is a compact real-time snapshot imaging spectrometer, its overall structure is still large, which is not conducive to concealed and small aircraft carrying reconnaissance and monitoring

Method used

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  • Miniature snapshot imaging spectrometer and imaging method thereof
  • Miniature snapshot imaging spectrometer and imaging method thereof

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Embodiment 1

[0025] Embodiment 1: as figure 1 As shown, a small snapshot imaging spectrometer of this embodiment includes a polarizer 1 arranged in sequence along the light propagation direction, a microlens array 2, a birefringent crystal column array whose optical axes are perpendicular to each other, an analyzer 6, and a photodetector device and signal processing unit 7, the non-transparent surface of the birefringent crystal column array whose optical axes are perpendicular to each other is coated with light-absorbing material; the birefringent crystal column array whose optical axes are perpendicular to each other includes the first sub-crystal column 3 and the second Two sub-crystal pillars 5, the first sub-crystal pillar 3 and the second sub-crystal pillar 5 are evenly distributed into arrays according to the order of length difference and glued together, the difference between the length difference between the first sub-crystal pillar 3 and the second sub-crystal pillar 5 The diffe...

Embodiment 2

[0030] Embodiment 2: as figure 2 As shown, a small-scale snapshot imaging spectrometer in this embodiment includes a polarizer 1 sequentially arranged along the light propagation direction, a birefringent crystal column array whose optical axes are perpendicular to each other, a microlens array 2, and a fused silica glass column array 8, A polarizer 6, a photodetector and a signal processing unit 7; the birefringent crystal column array whose optical axes are perpendicular to each other includes a first sub-crystal column 3 and a second sub-crystal column 5, the first sub-crystal column 3 and the second sub-crystal column The sub-crystal pillars 5 are evenly distributed into an array in the order of length difference and glued together. The difference in optical path difference that can be generated by the difference in length between the first sub-crystal pillar 3 and the second sub-crystal pillar 5 satisfies Nyquist sampling According to the law, the difference of the resul...

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Abstract

The invention relates to a miniature snapshot imaging spectrometer and an imaging method thereof and belongs to the technical field of snapshot imaging spectroscopy. The technical key points are as follows: the miniature snapshot imaging spectrometer is provided, in sequence, with a polarizer, a microlens array, birefringent crystal column arrays with optical axes perpendicular to each other, an analyzer, a photodetector and a signal processing part, wherein the birefringent crystal column arrays with optical axes perpendicular to each other are arranged in order of length differences, and thenon light-transmitting surface of each birefringent crystal column is coated with a light-absorbing material to achieve a diaphragm effect. A target is imaged through the microlens array, image information of equal spacing distribution of optical path differences is generated through the birefringent crystal column arrays, and spectral information of the target image is obtained by conducting corresponding Fourier transform and spectral reconstruction of the image information of the equal spacing distribution of the optical path differences. The miniature snapshot imaging spectrometer can capture the target image and spectral information quickly, is compact in structure and light in weight and can be applied in the field of fast reconnaissance, monitoring and the like.

Description

technical field [0001] The invention relates to an imaging spectrometer and an imaging method thereof, in particular to a small snapshot imaging spectrometer and an imaging method thereof, and belongs to the technical field of snapshot imaging spectroscopy. Background technique [0002] The Fourier transform imaging spectrometer is an interferometric imaging spectrometer based on Michelson interferometer or other optical path difference generating components. It can obtain the interference intensity distribution of the target, and obtain the target spectral information through Fourier transform. dimensional space information. [0003] With the development of spectroscopic technology, the study of fast and real-time acquisition of target image and spectral information has been put forward for imaging spectrometer. For the Fourier transform imaging spectrometer, the paper "Application of Multiple-Image Fourier Transform Spectral Imaging to Measurement of Fast Phenomena, OPTIC...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J3/28G01J3/45G01J3/02
CPCG01J3/0205G01J3/2803G01J3/2823G01J3/45G01J2003/452
Inventor 金鹏张宇朱帅帅林杰
Owner HARBIN INST OF TECH
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