Compact and Robust Beam Steering for IRCM Applications

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N68335-02-C-3076
Agency Tracking Number: N01-169-05
Amount: $98,640.00
Phase: Phase I
Program: SBIR
Awards Year: 2002
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
Optra, Inc.
461 Boston Street, Topsfield, MA, 01983
DUNS: 607836293
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Michael Hercher
 Staff Engineer/CTO
 (978) 887-6600
 mhercher@optra.com
Business Contact
 James Engel
Title: President
Phone: (978) 887-6600
Email: jengel@optra.com
Research Institution
N/A
Abstract
A technique based on a pair of in-line cesium bromide prisms is proposed for the rapid and reliable steering of a 5-watt laser beam as part of an Infra-Red Counter-Measure system for use in naval aircraft. To steer the beam, both prisms are rotated aboutan axis coincident with the incoming laser beam axis. By using prisms with a 24¿ angle, laser beams with a wavelength between 0.5 micron and 5.0 microns can be steered in any direction up to 45¿ from the incoming beam axis. This range can easily beincreased by adding a reverse telescope immediately following the prism pair. The beam steering angle is to first order insensitive to tilts and displacements of the prism pair, and the prism/motor structure is compact and has a high mechanical resonantfrequency. These factors work to minimize the systems sensitivity to vibrations. The approach is based on mature technologies and should lead to a robust, reliable, accurate, and economical solution to the Navy's beam-steering problem. Static in-linebeam-steering, continuous spiral laser beam scans, high-speed and high-resolution random access beam-steering with very high optical efficiency.

* information listed above is at the time of submission.

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