Title :
Accurate optical design of an acousto-optic tunable filter imaging spectrometer
Author :
Pengwei Zhou ; Huijie Zhao ; Ying Zhang ; ChongChong Li
Author_Institution :
Key Lab. of Precision Opto-Mechatron. Technol., Beihang Univ., Beijing, China
Abstract :
When designing an acousto-optic tunable filter (AOTF) imaging spectrometer, the traditional method used a refractive grating to simulate the effects of the AOTF. We studied the acousto-optic interaction in AOTF with exact analysis and found that simulating AOTF with grating was inaccurate due to angular dependence of grating spacing. We proposed a new method to simulate the diffraction using user defined surface (UDS) function in ZEMAX based on accurate acousto-optic interaction. Optimization and analysis of the optical design for an AOTF imaging spectrometer was carried out with the UDS. The obtained geometric MTF and spectral image indicates that the proposed method is efficient, accurate and feasible for routine design of the AOTF imaging spectrometer.
Keywords :
acousto-optical filters; diffraction gratings; image resolution; optical design techniques; optical transfer function; optical tuning; spectrometers; AOTF imaging spectrometer; UDS function; ZEMAX; acousto-optic interaction; acousto-optic tunable filter imaging spectrometer; angular dependence; diffraction grating; geometric MTF; grating spacing; optical design; optimization; refractive grating; spectral image; user defined surface; Acoustic beams; Crystals; Gratings; Optical filters; Optical imaging; Vectors; AOTF; acousto-optic; grating simulation; user defined surface;
Conference_Titel :
Imaging Systems and Techniques (IST), 2012 IEEE International Conference on
Conference_Location :
Manchester
Print_ISBN :
978-1-4577-1776-5
DOI :
10.1109/IST.2012.6295512