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Optical CorrelationPattern recognition may supplement or replace certain navigational aids on spacecraft in docking or landing activities. The need to correctly identify terrain features remains critical in preparation of autonomous planetary landing. One technique that may solve this problem is optical correlation. Correlation has been successfully demonstrated under ideal conditions; however, noise significantly affects the ability of the correlator to accurately identify input signals. Optical correlation in the presence of noise must be successfully demonstrated before this technology can be incorporated into system design. An optical correlator is designed and constructed using a modified 2f configuration. Liquid crystal televisions (LCTV) are used as the spatial light modulators (SLM) for both the input and filter devices. The filter LCTV is characterized and an operating curve is developed. Determination of this operating curve is critical for reduction of input noise. Correlation of live input with a programmable filter is demonstrated.
Document ID
19920012023
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Cotariu, Steven S.
(Military Academy West Point, NY, United States)
Date Acquired
September 6, 2013
Publication Date
December 1, 1991
Publication Information
Publication: Texas A and M Univ., NASA(ASEE Summer Faculty Fellowship Program, 1991, Volume 1
Subject Category
Optics
Accession Number
92N21266
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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