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Proceedings Paper

Wavelength-agile telescope system with diffractive wavefront control and acousto-optic spectral filter
Author(s): Mark T. Gruneisen; Raymond C. Dymale; James R. Rotge; Donald L. Lubin; 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-agile means of compensating large aberrations over limited instantaneous spectral bandwidths. Acousto-optic tunable filters (AOTF) based on acousto-optic Bragg diffraction have been demonstrated as wavelength-agile means 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-lambda phase profile of the PDO is defined. Wavelength-agile operation is achieved by synchronously tuning the PDO and AOTF over a 100nm spectral range. Near-diffraction-limited image quality is demonstrated.

Paper Details

Date Published: 12 October 2004
PDF: 7 pages
Proc. SPIE 5553, Advanced Wavefront Control: Methods, Devices, and Applications II, (12 October 2004); doi: 10.1117/12.561732
Show Author Affiliations
Mark T. Gruneisen, Air Force Research Lab. (United States)
Raymond C. Dymale, Boeing Co. (United States)
James R. Rotge, Boeing Co. (United States)
Donald L. Lubin, Boeing Co. (United States)
David G. Voelz, New Mexico State Univ. (United States)
Melinda Deramo, New Mexico State Univ. (United States)

Published in SPIE Proceedings Vol. 5553:
Advanced Wavefront Control: Methods, Devices, and Applications II
John D. Gonglewski; Mark T. Gruneisen; Michael K. Giles, Editor(s)

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