Design of a Large Angular Aperture TeO2 Acousto-Optic Tunable Filter.

摘要

In this paper the design of a large angular aperture acousto-optic tunable filter (AOTF) using TeO2 crystals is described. A new crystal orientation with Theta sub a = 100 deg. and Theta sub i =23.4 deg. is proposed. It has been proven in the experiments that this AOTF meets the exact condition of tangent momentum match. The measured tuning relation is in good agreement with theoretical calculations and the spectral resolution has been improved by nearly 10 Angstroms. After compensation, the change in deflection angle is decreased to + or - 0.06 degrees. Chinese Translations, China. (JHD)