Multiple-grating monochrometer and calibration method thereof

Abstract

The invention discloses a multiple-grating monochrometer. The monochrometer mainly comprises a mono-light optical splitting system, a control system, a computer and a printer, wherein the splitting system and the control system are designed as one, the upper part of the device is a grating chamber, the lower part is a controller chamber; the grating chamber mainly comprises an entrance slit, two exit slits, a color filter group, two concave mirrors, a grating turntable, a reflector and a stepper motor, wherein the open or close size of the entrance and exit slits are controlled manually; the hardware circuit adopts a second-order Butterworth filter to perform anti-aliasing filtering, and the hardware 8-bit pulse width modulation method is used to realize the control of the stepper motor. The multiple-grating monochrometer overcomes the bottleneck of low data transmission speed caused by the use of the RS232 interface before and the USB2.0 interface is used to connect with the computer. A power distribution system, a grating turntable control system, a filtering wheel control system, a reflector control system and a high speed and high accuracy data acquisition system are integrated to increase the integration degree, reliability, control precision and scanning precision of the system. The newly provided automatic scanning multiple-grating monochromatic spectrometer system has wide development prospect.

Description

technical field [0001] The invention relates to a spectrum analysis and measurement technology, in particular to a multi-grating monochromator and a calibration method thereof. Background technique [0002] A monochromator is a spectroscopic instrument that decomposes a beam of composite light into monochromatic light of different wavelengths through the diffraction of a grating. It is an important basic instrument for spectral analysis and measurement in the fields of optics and optoelectronics. Due to the rapid development of electronic technology, photoelectric detection technology puts forward higher requirements in terms of instrument resolution, measurement range, measurement sensitivity, measurement speed, integration, and integration. Improving the wavelength scanning range, speed, precision and integration of monochromatic spectrometers is the main task of monochromatic spectrometer control system design. The original computer-controlled automatic grating monochrom...

AI Technical Summary

Problems solved by technology

The original computer-controlled automatic grating monochromatic spectrometer mostly uses a sinusoidal mechanism, only one grating can be installed, and the scanning spectrum range is narrow; in addition, the sinusoidal mechanism can only do reciprocating motion, which is easy to crash. The grating monochromatic spectrometer using the sinusoidal mechanism is facing the trend of elimination

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