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Optical Engineering

Compensated telescope system with programmable diffractive optic
Author(s): Mark T. Gruneisen; Lewis F. DeSandre; Raymond C. Dymale; James R. Rotgé; Donald L. Lubin
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Paper Abstract

Diffractive wavefront control with programmable optically efficient modulo gratings has been successfully demonstrated as a means of compensating large optical aberrations and steering an outgoing beam over small angles without mechanical motion. This work builds on past work to demonstrate the integrated performance of a programmable diffractive element of large pixel count with a telescope system. More specifically, a liquid-crystal-based spatial light modulator is used as a reconfigurable diffractive optical element in a telescope system to compensate for large aberrations associated with variations in object range and field angle within the telescope's field of regard. The telescope consists of a conventional primary mirror that gimbals relative to the other components of the system and a programmable diffractive optic that compensates for more than 40 waves of aberration associated with defocus and off-axis aberrations. In this setup, aberration compensation via the programmable diffractive optic allows the object range to be varied by 160 times the depth of focus and increases the diffraction-limited field of regard by a factor of 70 while maintaining near-diffraction-limited performance.

Paper Details

Date Published: 1 February 2005
PDF: 9 pages
Opt. Eng. 44(2) 023201 doi: 10.1117/1.1849552
Published in: Optical Engineering Volume 44, Issue 2
Show Author Affiliations
Mark T. Gruneisen, Air Force Research Lab. (United States)
Lewis F. DeSandre, Air Force Research Lab. (United States)
Raymond C. Dymale, The Boeing Co. (United States)
James R. Rotgé, The Boeing Co. (United States)
Donald L. Lubin, The Boeing Co. (United States)

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