Optical system design of polarization imaging spectrometer for ground-based astronomical observation

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.

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Optical system design of polarization imaging spectrometer for ground-based astronomical observation

Cited by 2 publications

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Spatial and spectral image distortions caused by diffraction of an ordinary polarised light beam by an ultrasonic wave

Spatial and spectral image distortions caused by diffraction of an ordinary polarised light beam by an ultrasonic wave

Chromatic aberrations correction for imaging spectrometer based on acousto-optic tunable filter with two transducers

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