Radiant energy – Photocells; circuits and apparatus – With circuit for evaluating a web – strand – strip – or sheet
Patent
1997-12-16
2000-04-04
Westin, Edward P.
Radiant energy
Photocells; circuits and apparatus
With circuit for evaluating a web, strand, strip, or sheet
250223R, 250223B, G01N 2184
Patent
active
060464623
ABSTRACT:
An improved lighting system which illuminates the parts with both generally collimated and diffused light simultaneously useful with machine vision systems. This lighting system allows determination of part identification, part location, part orientation about a vertical axis thereof as well as side-up orientation of the part. The parts are transported on a conveyor surface which is made of a translucent medium. However, such translucent medium does permit the viewing of the shadows cast by objects thereon. The light source is positioned directly over the parts being inspected. A camera is positioned below the conveyor surface. Residing between the collimated light source and the parts supported on the conveyor surface is a light-diffusing member. The light-diffusing member has a structure such that it permits a portion of the generally collimated light to pass therethrough without obstruction while simultaneously diffusing a second portion of light produced by the source of collimated light. The combination generally collimated light and diffuse light serve to cast a perimeter shadow of each part and illuminate any downward-facing part surfaces which are not in contact with the conveyor surface. The result is a shadow of different contrasts. Those portions of the parts in contact with the support surface are much darker than those portions of the parts which are elevated away from the support surface.
REFERENCES:
patent: 1997712 (1935-04-01), Bauer
patent: 3484615 (1969-12-01), Noro et al.
patent: 3708679 (1973-01-01), Stock et al.
patent: 3778618 (1973-12-01), Laskowski
patent: 3837732 (1974-09-01), Bauer
patent: 4063823 (1977-12-01), Grat
patent: 4070575 (1978-01-01), Park et al.
patent: 4147433 (1979-04-01), Drinkuth
patent: 4147930 (1979-04-01), Browne et al.
patent: 4171161 (1979-10-01), Jung
patent: 4390278 (1983-06-01), Inoue
patent: 4459027 (1984-07-01), Kafri et al.
patent: 4497576 (1985-02-01), Caussignac et al.
patent: 4509075 (1985-04-01), Simms et al.
patent: 4678920 (1987-07-01), Iadipaolo et al.
patent: 4786801 (1988-11-01), Shay
patent: 4805124 (1989-02-01), Krufka
patent: 4959537 (1990-09-01), Kimoto et al.
patent: 5114230 (1992-05-01), Pryor
patent: 5280170 (1994-01-01), Baldwin
patent: 5314055 (1994-05-01), Gordon
patent: 5392360 (1995-02-01), Weindelmayer et al.
patent: 5402193 (1995-03-01), Choate
patent: 5405015 (1995-04-01), Bhatia et al.
patent: 5440385 (1995-08-01), Fein et al.
Palone Thomas W.
Yokajty Joseph E.
Bocchetti Mark G.
Eastman Kodak Company
Luu Thanh X.
Westin Edward P.
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