Inspection apparatus including photodetection and scanning appar

Details Inspection apparatus including photodetection and scanning appar Inspection apparatus including photodetection and scanning appar

1987-04-28

1989-01-10

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250235, 250236, 350 68, G01N 2188, H01J 314

Patent

active

047975580

ABSTRACT:
An inspection apparatus for inspecting, for example, sheet material, in which a beam of radiation 12 is scanned across a sheet 13 by means of a first facet 41 of a rotating mirror drum 22. Scattered radiation from the sheet is received by a second facet 46 and 2 is passed to a photodetector 49 for analysis.

REFERENCES:
patent: 4018504 (1977-04-01), Wu et al.
patent: 4170398 (1979-10-01), Koester
patent: 4523093 (1985-06-01), Neumann

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