OTF光谱仪的小型化研究

he development and combination of the acousto-optic tunable filter (AOTF) and near infrared (NIR) inspection technology in recent years made it possible for the miniaturization of the AOTF spectrometer. Base on the linear optical configuration of the laboratory AOTF spectrometer utilizing the orthogonal polarizing method, three plans, ranging from the collimated linear optical path to the folding ones by one or two reflectors were put forward. According to the intensity ratio between the first order beam and zero order beam as well as taking the size of the optical system into consideration, the performance and feasibility of each plan were assessed and a symmetrically U-shaped optical configuration utilizing two reflectors was achieved as the ultimately optimized plan. The study of the miniaturization of the optical system in this paper brought certain evidence for the design of portable AOTF spectrometer.