Share Email Print

Proceedings Paper

Sub-µrad laser beam tracking
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

We compare active optical elements based on different technologies to accomplish the requirements of a 2-dim. fine tracking control system. A cascaded optically and electrically addressable spatial light modulator (OASLM) based on liquid crystals (LC) is used for refractive beam steering. Spatial light modulators provide a controllable phase wedge to generate a beam deflection. Additionally, a tip/tilt mirror approach operating with piezo-electric actuators is investigated. A digital PID controller is implemented for closed-loop control. Beam tracking with a root-mean-squared accuracy of Δα=30 nrad has been laboratory-confirmed.

Paper Details

Date Published: 5 October 2006
PDF: 7 pages
Proc. SPIE 6397, Technologies for Optical Countermeasures III, 63970J (5 October 2006); doi: 10.1117/12.690424
Show Author Affiliations
Ivo Buske, German Aerospace Ctr. (Germany)
Wolfgang Riede, German Aerospace Ctr. (Germany)

Published in SPIE Proceedings Vol. 6397:
Technologies for Optical Countermeasures III
David H. Titterton, Editor(s)

© SPIE. Terms of Use
Back to Top