Spectrograph

Abstract

The invention discloses a spectrograph which comprises a beam splitter and a plurality of array spectrographs. To-be-detected light is divided into a plurality of beams by the beam splitter, each wave band is measured accurately by measuring each array spectrograph, wherein the array spectrographs are connected end to end in scope and cover the whole to-be-detected wave bands, and spectral power distribution of the whole to-be-detected wave bands is obtained accurately only by one measurement. The spectrograph has the advantages of being fast in measuring speed, high in measuring accuracy, high in fine division of wavelength, high in energy utilization rate, convenient to operate and the like.

Description

technical field [0001] The invention belongs to the field of optical radiation measurement, and in particular relates to a spectrometer. Background technique [0002] The spectrometer is a device used to measure and analyze the spectral composition of the spectral radiant power distribution, and is widely used in light source radiation measurement, color measurement, element identification, chemical analysis and other fields. Commonly used spectrometers include monochromators and polychromators (multi-channel spectrometers, array fast spectrometers, etc.). Array spectrometers using multi-channel detectors have a measurement speed of milliseconds. In recent years, they have developed rapidly and their applications have become more and more extensive. [0003] The stray light index is an important index of the array spectrometer. For the array spectrometer, stray light refers to other spectral components irradiated on the pixel corresponding to a specific wavelength point, and...

AI Technical Summary

Problems solved by technology

When each monochromator actually works, it outputs monochromatic light of different wavelengths by rotating the grating, which not only takes a long time; and as mentioned above, all the measured light is introduced into the monochromator at one time, and a large amount of stray light is introduced, so the measurement is accurate low degree

[0006] In addition, since the zero-order spectrum of the grating has the largest energy but cannot be dispersed, the spectrometer actually measures the first-order spectrum of the grating with dispersion, but because of its low energy, it is limited by the sensitivity of the detector, and often requires a larger energy incident light. In order to ensure that the first-order spectrum is detected by the detector, the energy utilization rate is low; but when the incident light energy increases, the energy of its zero-order spectrum and other order spectra is also greater, and there are more stray light inside the spectrometer, which affects measurement accuracy

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