Design of photometric system of portable high-speed near-infrared grating spectrometer

A design of portable high-speed near-infrared grating spectrometer based on linear array CCD and USB2.0 data acquisition system was introduced. Plan grating, collimator system and imaging system with the spherical reflector were used, which made the spectrum plane and little curved (﹤4.2%), and the CCD was used to detected the spectrum. Hardware structure was optimized by using the FPGA and USB2.0, and the speed of data acquisition was improved greatly, the fastest up to 2MB/S. Analyzing the measuring data, the wavelength calibration was given. By the result, the spectrometer is portable and high-speed, and the wavelength accuracy is up to 1nm.