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Filter Enhances Fluorescent-Penetrant-Inspecting BorescopeSlip-on eyepiece for commercial ultraviolet-light borescope reduces both amount of short-wave ultraviolet light that reaches viewer's eye and apparent intensity of unwanted reflections of white light from surfaces undergoing inspection. Fits on stock eyepiece of borescope, which illuminates surface inspected with intense ultraviolet light. Surface, which is treated with fluorescent dye, emits bright-green visible light wherever dye penetrates - in cracks and voids. Eyepiece contains deep-yellow Wratten 15 (G) filter, which attenuates unwanted light strongly but passes yellow-green fluorescence so defects seen clearly.
Document ID
19900000131
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Molina, Orlando G.
(Rockwell International Corp.)
Date Acquired
August 14, 2013
Publication Date
March 1, 1990
Publication Information
Publication: NASA Tech Briefs
Volume: 14
Issue: 3
ISSN: 0145-319X
Subject Category
Fabrication Technology
Report/Patent Number
MFS-29379
Accession Number
90B10131
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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