Minimizing aberrations of a near-infrared acousto-optic video spectrometer by optimizing the tunable filter parameters

摘要

Minimization of the aberration distortions of a near-infrared image spectrometer is addressed in this study. A model of an acousto-optical video spectrometer has been developed that provides a fairly high quality of spectral images over the 0.9-1.7 mu m range. Aberration distortions are minimized through ZEMAX software, using a semi-automated (interactive) procedure to optimize the geometric parameters of an acousto-optic paratellurite cell with the selected parameters of other optical elements of the system. The prototype developed here is characterized by the absence of distortion and lateral chromatic aberration, with diffraction-limited spatial resolution of 30 mu m in the image plane within the entire field of view. The resulting spectral images confirm the calculation and simulation results. (C) 2020 Optical Society of America