Document Type

Article

Publication Date

11-1995

Publication Source

Optical Engineering

Abstract

Liquid-crystal arrays represents one of the first practical technologies capable of steering light by electronic control only. We use such a device to steer the field of view of a broadband imaging sensor. Unfortunately, dispersion degrades the image quality by smearing out details in the image and by introducing multiple diffraction orders (echoes) at the detector plane. We present a method to compensate for these unwanted effects and thus restore the broadband images obtained with the beam steerer. We use the beam-propagation method to find the wavelength-dependent impulse response, from which we determine the appropriate Wiener filter. When training data are available, we improve the filter with the adaptive least mean square algorithm. We present restored images that demonstrate the capabilities of this technique.

Inclusive pages

3138-3145

ISBN/ISSN

0091-3286

Document Version

Published Version

Publisher

Society of Photo-Optical Instrumentation Engineers (SPIE)

Volume

34

Issue

11

Peer Reviewed

yes

Keywords

optical remote sensing and image processing, liquid crystals, beam steering, imaging, adaptive signal processing

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