Apparatus for and method of checking external appearance of sold

Details Apparatus for and method of checking external appearance of sold Apparatus for and method of checking external appearance of sold

1990-12-13

1993-03-09

Evans, F. L.

Optics: measuring and testing

By polarized light examination

With light attenuation

356237, G01B 1124, G01N 2100

Patent

active

051929830

ABSTRACT:
A laser beam is projected from above toward a solder fillet for bonding the corresponding one of leads of an electronic component to a circuit board. The laser beam is reflected by the solder fillet, and the reflected beam is received by light receiving means disposed above and aslant the leads, thereby to measure a shape of the solder fillet.

REFERENCES:
Geise et al, "A Laser Scaner for PC Board Inspection," Electronic Packaging and Production, vol. 20, #12, Dec. 1980.

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