Paper
19 August 1997 Optical image processing with the liquid crystal active lens
Author Affiliations +
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.
© (1997) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Vincent Laude, Jean-Pierre Huignard, Martin Defour, and Philippe Refregier "Optical image processing with the liquid crystal active lens", Proc. SPIE 3101, New Image Processing Techniques and Applications: Algorithms, Methods, and Components II, (19 August 1997); https://doi.org/10.1117/12.281273
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CITATIONS
Cited by 1 scholarly publication.
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KEYWORDS
Spatial light modulators

Liquid crystals

Image processing

Active optics

Image quality

Edge detection

Linear filtering

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