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Optical Engineering

Wavelength-agile telescope system with diffractive wavefront control and acousto-optic spectral filter
Author(s): Mark T. Gruneisen; Raymond C. Dymale; James R. Rotgé; David G. Voelz; Melinda Deramo
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Paper 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.

Paper Details

Date Published: 1 October 2005
PDF: 5 pages
Opt. Eng. 44(10) 103202 doi: 10.1117/1.2083187
Published in: Optical Engineering Volume 44, Issue 10
Show Author Affiliations
Mark T. Gruneisen, Air Force Research Lab. (United States)
Raymond C. Dymale, The Boeing Co. (United States)
James R. Rotgé, The Boeing Co. (United States)
David G. Voelz, New Mexico State Univ. (United States)
Melinda Deramo, Unisys Corp. (United States)

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