Radiant energy – Photocells; circuits and apparatus – With circuit for evaluating a web – strand – strip – or sheet
Patent
1994-09-22
1996-09-10
Westin, Edward P.
Radiant energy
Photocells; circuits and apparatus
With circuit for evaluating a web, strand, strip, or sheet
2502062, 25055931, 356 301, G01V 800
Patent
active
055548580
ABSTRACT:
A position sensing detector in which each of a plurality of sensing channels is provided with ends and an output current lead at each end of each channel. A light spot is imaged along the length of the channel. The channels are electrically isolated from each other. The channels may be proportional to a selected keystone pattern, and the channels may be rectangular-shaped and accommodate keystoning effects of an imaged beam.
REFERENCES:
patent: 4361758 (1982-11-01), Rotolo
patent: 4576481 (1986-03-01), Hansen
patent: 4691101 (1987-09-01), Leonard
patent: 5004929 (1991-04-01), Kakinoki et al.
patent: 5137350 (1992-08-01), Misawa et al.
patent: 5210402 (1993-05-01), Oomen
Costa Pat V.
Fritz Donald
Yonescu William E.
Calogero Stephen
Fogiel Max
Robotic Vision Systems, Inc
Westin Edward P.
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