Substrate location and detection apparatus

Details Substrate location and detection apparatus Substrate location and detection apparatus

1993-09-23

1995-05-23

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

414936, G01N 2186

Patent

active

054183820

ABSTRACT:
A device for detecting and locating substrates in a cassette including a homogeneous columnar radiation source adjacent to and radiating the edges of the substrates, rod-shaped directional lenses transmitting and replicating the substrate edges in their field of view and directing the transmitted reflected radiation and image of the field of view onto sensing pixels activated to produce indications of the presence and location of the substrates in the cassette.

REFERENCES:
patent: 4678902 (1987-07-01), Perlin
patent: 4786816 (1988-11-01), Ohmori et al.
patent: 4994666 (1991-02-01), Higgison et al.
patent: 5225691 (1993-07-01), Powers et al.
patent: 5266812 (1993-11-01), Mokuo
patent: 5308993 (1994-05-01), Holman et al.

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