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Optical proximity detectorSensitive, relatively inexpensive instrument uses phase-detection techniques to sense presence of objects. Phase-sensitive detectors, LED, photodiode with response matched to LED output, and filtering lens allow detector to operate over narrow radiation band, giving selectivity over stray light.
Document ID
19770000041
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Hermann, W. A.
Johnston, A. R.
Date Acquired
August 8, 2013
Publication Date
June 1, 1977
Publication Information
Publication: NASA Tech Briefs
Volume: 2
Issue: 1
ISSN: 0145-319X
Subject Category
Physical Sciences
Report/Patent Number
NPO-13306
Accession Number
77B10041
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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