Open AccessChromatic aberrations correction for imaging spectrometer based on acousto-optic tunable filter with two transducers
Author(s) -
Haitao Zhao,
Ziye Wang,
Guorui Jia,
Ying Zhang,
Zefu Xu
Publication year - 2017
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.023809
Subject(s) - optics , chromatic aberration , chromatic scale , spectrometer , transducer , focal length , physics , catadioptric system , materials science , lens (geology) , quantum mechanics
The acousto-optic tunable filter (AOTF) with wide wavelength range and high spectral resolution has long crystal and two transducers. A longer crystal length leads to a bigger chromatic focal shift and the double-transducer arrangement induces angular mutation in diffracted beam, which increase difficulty in longitudinal and lateral chromatic aberration correction respectively. In this study, the two chromatic aberrations are analyzed quantitatively based on an AOTF optical model and a novel catadioptric dual-path configuration is proposed to correct both the chromatic aberrations. The test results exhibit effectiveness of the optical configuration for this type of AOTF-based imaging spectrometer.