Line sensing method and apparatus

Details Line sensing method and apparatus Line sensing method and apparatus

1982-09-14

1985-05-21

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

356401, 250557, G05B 100

Patent

active

045188564

ABSTRACT:
An optical thin line-tracking sensor comprises a small member mounting ends of a light source fiber and a pair of receiving fibers which receive reflected light. Reflected light transmitted through the receiving fibers operate photosensors whose outputs are differentially combined to provide a tracking error signal. Augmenting circuits enable operation over a wide range. Means to sense other indicia carried on a web or sheet are disclosed. A line-tracking head which includes a laser-light cutter is also disclosed.

REFERENCES:
patent: 3502880 (1970-03-01), Martinek et al.
patent: 4146797 (1979-03-01), Nakagawa
patent: 4340950 (1982-07-01), Kosaka
patent: 4370059 (1983-01-01), Masuda
patent: 4379225 (1983-04-01), Apothaker
patent: 4406000 (1983-09-01), Shoji et al.

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