Elliptical reflector illumination system for inspection of print

Details Elliptical reflector illumination system for inspection of print Elliptical reflector illumination system for inspection of print

1987-07-13

1989-01-31

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250216, 356430, G01N 2188

Patent

active

048018104

ABSTRACT:
An elliptical reflector illumination system for inspection of printed wiring boards including an elliptical reflector element for mounting above the board to be inspected with a region of the board generally at a first elliptical focus of the reflector element. There is a light source mounted generally at a second elliptical focus of the elliptical reflector element for illuminating substantially all facets of the region of the board at the first focus. One or more detectors are provided for sensing light reflected from the illuminated facets of at least a portion of the illuminated region of the board at the first focus.

REFERENCES:
patent: 4095905 (1978-06-01), Kuni et al.
patent: 4597665 (1986-07-01), Galbraith et al.
patent: 4714327 (1987-12-01), Marshall

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