Design and optimization of broadband micro-spectrometer system

In recent years, the application scenarios and scope of spectroscopic instruments have become more and more extensive, and the demand is also shifting toward miniaturization. Therefore, this paper investigated the design method and optimization measures of the optical system of a wide-band miniature spectrometer. First, the symmetrical Cheney-Turner structure is selected as the designed optical structure. Then, according to the optical parameters, the optical constraints are analyzed and summarized; and a set of system design methods based on optical constraints is proposed, and ZEMAX is used to design and simulate the optical system. In addition, effective solutions are proposed for the two problems caused by widening the spectral range. Finally, the optical system is actually measured, and the measurement results meet the expected design purpose.