Device for checking the position the coplanarity and the separat

Details Device for checking the position the coplanarity and the separat Device for checking the position the coplanarity and the separat

1998-06-09

2000-05-16

Pham, Hoa Q.

Optics: measuring and testing

By polarized light examination

With light attenuation

356398, 3562371, G01N 2100

Patent

active

060644834

ABSTRACT:
A device for detecting the position, coplanarity and separation of terminals of printed circuit board components wherein the terminals are consecutively imaged on a topically resolving detector through the use of an illuminating light source, and wherein the direct reflections are suppressed by the use of a polarized light source and by the existence of an optical analyzer in the imaging beam path, resulting in only the diffused reflections being used for imaging to avoid overradiation of the detector.

REFERENCES:
patent: 4028728 (1977-06-01), Sharp
patent: 4739175 (1988-04-01), Tamura
patent: 5162866 (1992-11-01), Tomiya et al.
patent: 5208463 (1993-05-01), Honma et al.
patent: 5212390 (1993-05-01), LeBeau et al.
patent: 5440391 (1995-08-01), Smeyers et al.
patent: 5751910 (1998-05-01), Bryant et al.

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