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High-throughput, high-signal-to-noise-ratio and high-sensitivity ultraviolet spectrum imager

A high signal-to-noise ratio, ultraviolet spectrum technology, applied in the high dynamic ultraviolet spectrum imager, high-sensitivity field, can solve the problems of low luminous flux, poor signal-to-noise ratio, low sensitivity, etc., to achieve improved luminous flux, high signal-to-noise ratio, high The effect of sensitivity

Pending Publication Date: 2021-07-13
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to solve the technical problems of low luminous flux, poor signal-to-noise ratio and low sensitivity in existing ultraviolet spectrum imagers, and to provide a high-throughput, high signal-to-noise ratio and high-sensitivity ultraviolet spectrum imager

Method used

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  • High-throughput, high-signal-to-noise-ratio and high-sensitivity ultraviolet spectrum imager
  • High-throughput, high-signal-to-noise-ratio and high-sensitivity ultraviolet spectrum imager
  • High-throughput, high-signal-to-noise-ratio and high-sensitivity ultraviolet spectrum imager

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Experimental program
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Embodiment

[0066] The dispersion unit is an ultraviolet aberration-corrected imaging grating 3, and the parameters of each part are as follows:

[0067]

[0068] The parameters of the Hadamard template are as follows:

[0069]

[0070]

[0071] In the above two tables, NA means not available, that is, because of the unified table format, some items are not meaningful to them. For example, the reflective imaging mirror 1 does not have the characteristic of density.

[0072] Among them, Hadamard template 2 takes the 3rd-order S matrix (0 1 1 0 1), and one sampling period is 3. Each time the template window is used to realize an encoded spatial sampling combination, and a total of three times to complete the bus field of view 10mm×0.3mm spectral imaging.

[0073] The target is imaged at the position of its primary image plane through the reflective imaging mirror 1, and this position is also the object-side conjugate position of the ultraviolet aberration correction imaging grating...

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Abstract

The invention relates to an ultraviolet spectral imager, in particular to a high-sensitivity and high-dynamic ultraviolet spectral imager. The invention aims to solve the technical problems of low luminous flux, poor signal-to-noise ratio and low sensitivity of the existing ultraviolet spectrum imager, and provides the ultraviolet spectrum imager with high flux, high signal-to-noise ratio and high sensitivity. According to the imager, a Hadamard template is adopted to complete spatial light path gating, a specific dispersion system and an ultraviolet sensitive image enhancement type detector assembly are adopted, and a combined signal measurement mode is utilized, so that the influence of inherent errors of the ultraviolet spectrum imager on a target signal true value is reduced, the deviation between a target signal measurement value and the true value is indirectly reduced, the signal-to-noise ratio of a detection signal is improved, and the luminous flux is improved by adopting the Hadamard template, so that the whole ultraviolet spectrum imager meets high sensitivity.

Description

technical field [0001] The invention relates to an ultraviolet spectrum imager, in particular to a high-sensitivity and high-dynamic ultraviolet spectrum imager. Background technique [0002] Spectral imaging technology began in the 1980s. It can obtain the two-dimensional geometric image and spectral dimension information of the target and provide the mapping relationship between the two. In the fields that require the spatial location and spectral fingerprint information of the target, such as environmental resources The fields of detection, astronomical observation, space weather research and biomedicine have been widely used and valued, and have the irreplaceable advantages of remote sensing technologies such as ordinary telescopes and radars. [0003] Spectral imaging instruments mainly include interferometric spectral imagers and dispersive spectral imagers. Among them, interferometric spectral imagers take advantage of optical multiplexing technology to obtain higher...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J3/28G01J3/02G01J3/04G01J3/18
CPCG01J3/0208G01J3/0213G01J3/0262G01J3/04G01J3/1804G01J3/2823G01J3/2846G01J2003/285
Inventor 孙鑫白永林陈震石大莲李然曹伟伟朱军王博王乐杨凯
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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