Interference imaging spectroscopy device and method for improving spectral resolution

A technology of spectral resolution and interference imaging, applied in interference spectroscopy, spectrum investigation, etc., can solve the problems of loss of luminous flux, increase the burden of detector response sensitivity, etc., and achieve high luminous flux and spectral resolution detection. The method is simple and practical, The effect of hyperspectral resolution detection

Active Publication Date: 2013-05-01
NANJING UNIV OF SCI & TECH
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Problems solved by technology

This method is currently only used in spatially modulated interferometric imaging spectrometers, but in spatially modulated interferometric imaging spectrometers, the use of slits makes there is a constraint relationship between spatial resolution and luminous flux
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  • Interference imaging spectroscopy device and method for improving spectral resolution

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Embodiment Construction

[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0018] refer to figure 1 , an interference imaging spectroscopy device for improving spectral resolution, characterized in that it includes a pre-optical system 1, a dispersion plate Sagnac transverse shearing beam splitting system 2, an imaging system 3 and a signal processing system 4 placed sequentially along the direction of the optical path; wherein , the front optical system 1 includes a front imaging objective lens 11 and a collimating objective lens 12 arranged in sequence along the optical path direction, the image plane of the front imaging objective lens 11 coincides with the front focal plane of the collimating objective lens 12; The beam system 2 includes a beam splitter 21, a high reflection mirror 22, a dispersion plate 24, and a high reflection mirror 23 arranged in sequence along the internal clockwise optical axis of the Sagnac common optica...

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Abstract

The invention discloses an interference imaging spectroscopy device and an interference imaging spectroscopy method for improving spectral resolution. The device comprises a front optical system, a dispersion flat plate Sagnac lateral shear beam splitting system, an imaging system and a signal processing system which are arranged along an optical path in sequence, wherein incident light of each point of a target enters the front optical system to eliminate stray light and form a collimated light beam; the light beam then enters the dispersion flat plate Sagnac lateral shear beam splitting system; the light is laterally sheared by the lateral shear beam splitting system; because of the flat plate dispersion effect, the shear distance changes along with light wavelength, and further optical path difference information which changes along with wave number is introduced; two beams of light formed by shearing subsequently enter the imaging system; interference information under different optical path differences of each point of the target is acquired by turning the lateral shear beam splitter or the entire system; and discrete fourier transform is performed on the acquired interference information of the target point to obtain high-resolution spectral information and two-dimensional image information of each spectral band are obtained. The device and the method have the advantages of high spectral resolution, high luminous flux, high target resolution and the like.

Description

technical field [0001] The invention belongs to the field of optical detection targets, in particular to a detection method capable of obtaining two-dimensional image information of the target space and high-resolution spectral information of each point of the target. Background technique [0002] Imaging spectroscopy technology uses a combination of radiation imaging technology and spectral measurement technology to obtain the two-dimensional spatial radiation intensity information of the target and the spectral information of each point of the target. Among them, interference imaging spectroscopy technology is a new detection technology developed in the 1980s. It uses the Fourier transform relationship between interference information and spectral information to calculate the spectral information of the target and obtain the two-dimensional spatial information of the target. The image-plane interference imaging spectroscopy technology that appeared in the mid-to-late 1990s...

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Application Information

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IPC IPC(8): G01J3/45
Inventor 李建欣孟鑫孙宇声徐婷婷郭仁慧沈华马骏朱日宏陈磊何勇
Owner NANJING UNIV OF SCI & TECH
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