Miniature optical spectrometer based on stepping motor

Abstract

The invention discloses miniature spectrograph which is based on a stepping motor-based and comprises an optical fiber connector, an entrance slit, a reflecting mirror, a blazed grating, a focusing mirror and a detector, wherein, the reflecting mirror includes an external framework as well as a plane mirror and a stepping motor which are arranged in the external framework. By adopting the stepping motor and a novel light path structure, the miniature spectrograph provided by the invention is characterized by good applicability and simple light path structure, and can overcome the defects of large signal noise, complicated optical structure and the like in the folding structure light path of the prior miniature spectrograph. In addition, the miniature spectrograph provided by the invention has the advantages of wide applicable spectral range, flexible use and portability, and is characterized in that no error is introduced, no change of internal resistance occurs, and the plane mirror can rotate at an angle of 360 DEG.

Description

technical field [0001] The invention relates to a spectrometer, in particular to a micro spectrometer based on a stepping motor. Background technique [0002] Spectroscopy is a technique for measuring the intensity of light in the ultraviolet, visible, near-infrared and infrared bands. It is widely used in various fields, such as color measurement, concentration detection of chemical components or electromagnetic radiation analysis. The traditional spectrometer is composed of many optical, electrical and mechanical discrete devices, which requires extremely complex optical system and precise mechanical structure, which reduces the reliability of the whole instrument, and has strict requirements on the working and storage environment of the instrument, which limits the its wider application. Especially for the application requirements of online (on-site) spectral measurement, traditional spectrometers are unable to solve it, and the development of miniaturized spectrometers ...

AI Technical Summary

Problems solved by technology

This structure is suitable for the infrared spectral range, but the realization of the ultraviolet, visible, near-infrared and other spectral bands is not mentioned; the optical path system adopts a folded structure, and the diffracted light and the incident light share the same optical path, which increases the difficulty of the actual optical path design. and complexity, and the signal noise is large, which affects the spectral resolution, so the application range of this scheme is limited

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