Modification of commercial borescope yields clear, glare-free images of defects on inside of tube. Used to examine diverging wall of tube. Wall illuminated by light from fiber distinct from fused-fiber cable used for viewing. Viewing cable holds right-angle mirror at tip so it can look sideways. Image appears, magnified, on monitor. Instrument offers large depth of focus and therefore used in tubes of varying inside diameter.
Borescope With Large Depth Of Focus
NASA Tech Briefs ; 14 , 5
1990-05-01
Miscellaneous
No indication
English
Noncontaminating Borescope Viewing Fixture
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