Method for achieving spaceborne imaging spectrometer based on multi-channel EMCCD

An imaging spectrometer and a technology of its realization method, which are applied in spectrum investigation and other directions, can solve the problems of reducing the frame rate of image sensors, poor application reliability, low signal-to-noise ratio, etc. Effect

CN103900690AInactive Publication Date: 2014-07-02CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2014-07-02
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for achieving a spaceborne imaging spectrometer based on a multi-channel EMCCD, and relates to the method for achieving the spaceborne imaging spectrometer. The method mainly solves the problems that due to the fact that many spectrum segments exist in an existing spaceborne imaging spectrometer, the signal to noise ratio is low, and the required frame frequency is high. On the basis of the thought of splicing a plurality of linear array image sensors, the method for achieving the imaging spectrometer based on the multi-channel EMCCD is provided. Each linear array image sensor receives physical information of different spectrum segments, and original high-requirement frame transfer time is converted into low-requirement line transfer time; images generated in the linear array image sensors are electronically multiplied and then are output so as to improve the signal to noise ratio of multi-spectrum-segment signals; the multiplication gain value is set by each linear array image sensor according to the quantum efficiency in the spectrum segments, the amplitude of output signals of the spectrum segments is kept consistent, the uniformity of the output signals of the spectrum segments is improved, and the whole dynamic range is widened.
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Description

technical field

[0001] The invention relates to a realization method of a spaceborne imaging spectrometer, in particular to a realization method of a spaceborne imaging spectrometer based on a multi-channel EMCCD. Background technique

[0002] The spaceborne imaging spectrometer is mainly composed of a front-end imaging system and a back-end spectrometer system. The front-end imaging system is used to obtain the spatial information of the target, and the back-end spectrometer system is used to obtain the spectral information of the target to provide a continuous spectrum for each spatial pixel. Information, the two are organically combined through the incident slit. According to the different spectroscopic methods used in the spectrometer system, imaging spectrometers can be divided into prisms, grating dispersion imaging spectrometers, filter imaging spectrometers, binary optical imaging spectrometers, interference imaging spectrometers, interference imaging spectrometers, ...

Examples

specific Embodiment approach 1

[0019] Specific implementation mode 1. Combination figure 2 and image 3 Illustrate this embodiment, the realization method of the space-borne imaging spectrometer based on multi-channel EMCCD, this method is realized by the following steps:

[0020] Step 1. The optical signal enters the spectrometer optical system through the telescope optical system and then outputs it through the multi-channel EMCCD;

[0021] Firstly, it is stipulated that the sensor of the imaging spectrometer is an area sensor structure, and the number of columns is the minimum number of pixels per row of the sensor n mini According to the formula: OK; the minimum number of sensor lines of the imaging spectrometer is equal to the number of bands n of the imaging spectrometer 谱段 ; The signal output by each line of the sensor of the imaging spectrometer is read out simultaneously by m channels, and the total output channel number of the sensor of the imaging spectrometer is p 通道 By the formula m×n 谱段...