A high-resolution linear array ccd direct-reading spectrometer

Abstract

The invention provides a high-resolution linear array CCD direct-reading type spectrometer, and the spectrometer comprises an incident module, a collimating mirror, an optical grating, a focusing lens, and a linear array CCD chip. The collimating mirror is disposed on an emergent optical path of the incident module, and the optical grating is disposed on an emergent optical path of the collimating mirror. The focusing lens is disposed on the emergent optical path of the optical grating, and the linear array CCD chip is disposed on the emergent optical path of the focusing lens. The incident module is used for segmenting the work band of the spectrometer into a plurality of subbands, and just allows the light at one suband to come out. The collimating mirror is used for the collimating of the emergent light of the incident module, and then enabling the light to be transmitted to the optical grating in different inclined angles. The central wavelengths of light beams at different subbands at different inclined angles have the same diffraction angle, and the light reflected by the optical grating is projected to the linear array CCD chip through the focusing lens. The spectrometer can greatly improve the resolution and sensitivity through the spectrum band segmenting technology and the technology of grating space division multiplexing.

Description

technical field [0001] The invention belongs to the technical field of spectrum measurement, and more specifically relates to a high-resolution linear array CCD direct-reading spectrometer. Background technique [0002] There are two mainstream technical solutions for spectral measurement and analysis instruments. The first type uses a monochromator for wavelength scanning, and a single-channel photodetector receives wavelengths one by one to draw a spectrum; the second type uses a grating to scan all wavelengths. At the same time, the dispersion is expanded, and a linear array photodetector is used to receive the optical power of all wavelengths at the same time, and draw a spectrogram. The first type of spectrometer adopts the serial signal processing method, and the spectral resolution is high, but it takes a long time to draw a spectrogram, which cannot meet the needs of real-time and fast processing, and in order to achieve a wide spectral measurement range, it is often...

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Problems solved by technology

[0006] Aiming at the defects of the prior art, the object of the present invention is to provide a linear array CCD direct-reading spectrometer with wide spectrum and high resolution, aiming to solve the problems of low wavelength resolution and low spectral sensitivity in existing linear array CCD spectrometers The problem

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