Device for detecting edge of transparent sheet of laminated tran

Details Device for detecting edge of transparent sheet of laminated tran Device for detecting edge of transparent sheet of laminated tran

1990-08-15

1992-05-19

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250548, G01N 2186

Patent

active

051151421

ABSTRACT:
A device for detecting an edge of a transparent sheet of a laminated transparent and translucent sheet assembly, is provided which includes a light source for producing a shadow of the edge of the transparent sheet on a translucent sheet, a photosensor operative to produce an electrical output which varies depending upon variation of intensity of light supplied thereto, and a lens for producing a clear image of the shadow on the photosensor. A picture processing unit determines the position of the edge of the transparent sheet on the basis of a variation of the output of the photosensor.

REFERENCES:
patent: 4238780 (1980-12-01), Doemens
patent: 4564912 (1986-01-01), Schwefel
patent: 4680719 (1987-07-01), Kishi et al.

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