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Novel snapshot type polarization spectral imaging system with adjustable multi-dimensional parameters

A polarization spectroscopy and imaging system technology, applied in polarization spectroscopy, spectrum investigation, etc., can solve the problems of system spatial and spectral resolution solidification, complex spectral unmixing, slow solution speed, etc., to achieve the effect of improving target detection capabilities

Active Publication Date: 2021-07-30
BEIHANG UNIV
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Problems solved by technology

However, due to the problems of fixed spatial and spectral resolution, complex spectral unmixing, and slow calculation speed in this type of system, there is still a certain distance between this technology and practical applications.

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  • Novel snapshot type polarization spectral imaging system with adjustable multi-dimensional parameters
  • Novel snapshot type polarization spectral imaging system with adjustable multi-dimensional parameters
  • Novel snapshot type polarization spectral imaging system with adjustable multi-dimensional parameters

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Embodiment Construction

[0030] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0031] The present invention can be regarded as a dual-dispersion type coded aperture imaging polarization spectrometer, in this type of spectrometer, the pixel size of the detector usually determines the spatial resolution, and the code element size of the coded aperture device determines the spectral resolution. Such as figure 1 , the present invention comprises objective lens 1, collimating lens 2, splitting grating 3, converging mirror A4, DMD5, converging mirror B6, light-combining grating 7, sub-aperture polarization assembly 8, CCD12, computer 13, wherein the single aperture sub-aperture polarization assembly 8 The aperture element is composed of an iris diaphragm 9 , a polarizer 10 and an imaging mirror 11 . The objective lens 1 images the object to be measured on the primary image plane, and the collimating lens 2 re...

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Abstract

The invention discloses a novel snapshot type polarization spectral imaging system with adjustable multi-dimensional parameters. The system is composed of an objective lens, a collimating mirror, a light splitting grating, a convergent mirror A, a digital micromirror device (DMD), a convergent mirror B, a light combining grating, a sub-aperture polarization assembly, a charge coupled device (CCD) and a computer. The polarization spectrum system controls the reflection direction of a code element corresponding to a coding matrix to carry out spectrum resolution modulation based on a programmable function of the DMD, carries out polarization state modulation of measured light through a sub-aperture polarization assembly, and carries out spatial resolution modulation by adopting a CCD pixel merging method. And finally, flexible modulation of multi-dimensional parameters of the novel snapshot polarization spectrum system is realized. The imaging system has the capability of flexibly modulating the spatial resolution, the spectral resolution and the polarization state of the target, and is beneficial to obtaining a proper multi-dimensional parameter combination detection mode under a certain detection condition so as to reduce the influence of the spectral resolution, the spatial scale effect and the atmospheric effect on the detection precision.

Description

technical field [0001] The invention relates to a novel snapshot type polarization spectrum imaging system with adjustable multi-dimensional parameters, which refers to a polarization spectrum imaging detection system that can flexibly modulate spatial and spectral resolution and polarization state. Background technique [0002] With the development of remote sensing science and the deepening of remote sensing applications, optical remote sensing instruments for integrated detection of multi-dimensional information of targets have emerged in recent years. A typical one is to add polarization devices to the traditional spectral imaging detection system to form polarization spectral imaging detection. The detection capability of this type of polarization spectral imaging system mainly depends on its spectral splitting mode and polarization modulation mode. [0003] In recent years, the snapshot coded aperture spectroscopy technology based on computational imaging stands out as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J3/447
CPCG01J3/447
Inventor 张颖仇汝冬刘惠兰张晞凌子盟孙婧怡
Owner BEIHANG UNIV
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