Share Email Print
cover

Proceedings Paper

Optical image processing with the liquid crystal active lens
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

The concept of the liquid crystal active lens basically amounts to adding a phase-only spatial light modulator to a classical lens. The modulator controls the phase of the optical wave in the pupil and achieves an arbitrary wavefront shape, that is limited only by the available modulation depth and resolution. We propose to apply the liquid crystal active lens to optical image processing. We demonstrate experimentally that directional edge extraction can be accomplished by subtracting shifted frames. The width of the edges can be varied continuously with our system. Focal length shifting can also be controlled continuously to yield low-pass filtering. After subtraction from the original frame, high-pass filtering is obtained as we show experimentally.

Paper Details

Date Published: 19 August 1997
PDF: 7 pages
Proc. SPIE 3101, New Image Processing Techniques and Applications: Algorithms, Methods, and Components II, (19 August 1997); doi: 10.1117/12.281273
Show Author Affiliations
Vincent Laude, Thomson-CSF (France)
Jean-Pierre Huignard, Thomson-CSF (France)
Martin Defour, Thomson-CSF (France)
Philippe Refregier, Ecole Nationale Superieure de Physique de Marseille (France)


Published in SPIE Proceedings Vol. 3101:
New Image Processing Techniques and Applications: Algorithms, Methods, and Components II
Philippe Refregier; Rolf-Juergen Ahlers, Editor(s)

© SPIE. Terms of Use
Back to Top