Surfaces to be bonded tested for cleanliness. Equipment includes commercial photoelectron-emission sensor. Inspected surface irradiated with ultraviolet photons from source in sensor head while anode in sensor head collects photoelectrons ejected from surface by absorbed photons. If intensity and spectrum of ultraviolet light and distance between sensor and surface held constant, then photocurrent varies according to amount and type of contamination.
Scanning Photoelectron-Emission Inspection Equipment
NASA Tech Briefs ; 13 , 11
1989-11-01
Miscellaneous
No indication
English
Detecting Contamination With Photoelectron Emission
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