1 October 2005 Wavelength-agile telescope system with diffractive wavefront control and acousto-optic spectral filter
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Abstract
Programmable diffractive optics (PDO) based on liquid-crystal (LC) technology has been demonstrated as a wavelength-tunable technology for compensating large aberrations over limited instantaneous spectral bandwidths. Acousto-optic tunable filters (AOTFs) based on acousto-optic Bragg diffraction have been demonstrated as a wavelength-tunable technology for selecting narrow spectral bands from white light with high rejection ratios. These technologies are integrated into a telescope system that includes a conventional primary mirror utilized off axis with more than 40 waves of aberration to view a white-light-illuminated object bar chart. A high-resolution LC PDO, situated in a pupil plane, compensates for the large primary mirror aberration. The AOTF, operating in an image plane, rejects light outside a 2-nm spectral band centered about the wavelength at which the modulo λ phase profile of the PDO is defined. Wavelength-tunable narrowband imaging is achieved by synchronously tuning the PDO and AOTF over a 100-nm spectral range. Near-diffraction-limited image quality is demonstrated.
© (2005) Society of Photo-Optical Instrumentation Engineers (SPIE)
Mark T. Gruneisen, Mark T. Gruneisen, Raymond C. Dymale, Raymond C. Dymale, James R. Rotgé, James R. Rotgé, David G. Voelz, David G. Voelz, Melinda Deramo, Melinda Deramo, } "Wavelength-agile telescope system with diffractive wavefront control and acousto-optic spectral filter," Optical Engineering 44(10), 103202 (1 October 2005). https://doi.org/10.1117/1.2083187 . Submission:
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