Printed circuit inspection system utilizing interference fringes

Details Printed circuit inspection system utilizing interference fringes Printed circuit inspection system utilizing interference fringes

1993-07-21

1995-05-09

Turner, Samuel A.

Optics: measuring and testing

By dispersed light spectroscopy

Utilizing a spectrometer

356345, 356392, G01B 902

Patent

active

054145139

ABSTRACT:
Incorrectly assembled circuit boards become detected by directing interfering laser beams on the surface of a circuit board. Fringe patterns develop on the surfaces of electronic elements as well as the board proper. These fringe patterns are compared with those of a reference standard and anomalies become electronically detected.

REFERENCES:
patent: 4653855 (1987-03-01), Birnbach et al.

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