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Real time optical edge enhancement using a Hughes liquid crystal light valveThe discovery of an edge enhancement effect in using a Hughes CdS liquid crystal light valve (LCLV) is reported. An edge-enhanced version of the input writing image can be directly obtained by operating the LCLV at a lower bias frequency and bias voltage. Experimental conditions in which this edge enhancement effect can be optimized are described. Experimental results show that the SNR of the readout image using this technique is superior to that obtained using high-pass filtering. The repeatability of this effect is confirmed by obtaining an edge enhancement result using two different Hughes LCLVs. The applicability of this effect to improve discrimination capability in optical pattern recognition is addressed. The results show that the Hughes LCLV can be used in both continuous tone and edge-enhancing modes by simply adjusting its bias conditions.
Document ID
19900035922
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Chao, Tien-Hsin
(JPL Pasadena, CA, United States)
Date Acquired
August 14, 2013
Publication Date
November 15, 1989
Publication Information
Publication: Applied Optics
Volume: 28
ISSN: 0003-6935
Subject Category
Optics
Accession Number
90A22977
Distribution Limits
Public
Copyright
Other

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