Miniaturized sub-nano grating light splitting system

Abstract

The invention discloses a miniaturized sub-nano grating beam splitting system. The system comprises an entrance slit, a collimating lens module, a transmission-type grating, a focusing lens module and a detector. A front signal is coupled to the entrance slit and is collimated by the collimating lens module after passing through the entrance slit, collimated parallel light is divided into monochromatic light with different emergent angles and different wavelengths after passing through the transmission-type grating, each monochromatic light is focused on the detector through the focusing lens module, and the detector is used for detecting the incident light. And finally, the spectral resolution of 0.1 nm in the range of 535-635 nm is realized, and the total size of the light splitting system is only about 108 mm * 63 mm, so that the light splitting system is relatively portable. The spectral resolution of 0.1 nm directly determines whether the system can distinguish different characteristic peaks when the spectral characteristic peak difference is small, so that the sample detection precision is ensured.

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