Light splitting device and method for improving spectrum probing range

Abstract

The invention provides a light splitting device for improving the spectrum probing range, which includes a first light splitting unit, a second light splitting unit, a detection unit and a processing unit, wherein the first light splitting unit is used for light splitting of measured light, and the wave length of the measured light covers the range of [lambda1, lambda 2]; the second light splitting unit includes chromatic dispersion component(s) Mi used for the light splitting of measured light before or / and after passing by the first light splitting unit and having different light splitting capabilities, wherein I equals to 1, 2 to N, and N equals to or is lager than 2, and the chromatic dispersion direction of the first and the second light splitting units are mutually vertical; the detection unit is used for converting optical signals of the received measured light passing by the first light splitting unit or the chromatic dispersion component(s) Mi into electrical signals Ii respectively, and transmitting the electrical signals to the processing unit, wherein I equals to 1, 2 to N, and N equals to or is lager than 2; and the processing unit is used for combining the received electrical signals Ii, so as to obtain the light intensity distribution of the measured light in the range of [lambda1, lambda 2], wherein I equals to 1, 2 to N, and N equals to or is lager than 2. The light splitting device provided by the invention has the advantages of excellent stability, simplicity in installation and debugging, excellent maintainability, low cost and the like.

Description

technical field [0001] The invention relates to the spectroscopic separation of polychromatic light, in particular to a spectroscopic device and method capable of significantly improving the spectrum detection range. Background technique [0002] A spectrometer is a device that continuously distributes and detects the collected spectra. At present, common spectrometer structures include Czerny-Turner structure, Paschen-Runge structure, flat-field concave grating spectroscopic system, echelle grating two-dimensional spectroscopic system, etc. The echelle two-dimensional spectroscopic system has the advantages of small size and high resolution, so it is widely used in occasions that require high resolution. [0003] figure 1 Schematically gives the basic structure diagram of the conventional échelle grating two-dimensional spectroscopic system, such as figure 1 As shown, the spectroscopic system includes a light source 1 , a collector mirror 2 , an entrance slit 3 , a colli...

AI Technical Summary

Problems solved by technology

[0012] 3. If image 3 As shown, with the wavelength from short-wavelength to long-wavelength, the distribution of spectral spectra on the detector is severely uneven, resulting in low space utilization of the detector

[0013] 4. Usually, if you need to collect the spectrum in the deep ultraviolet band, you need two exposures, which increases the moving parts and increases the measurement time

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