Registers – Coded record sensors – Particular sensor structure
Patent
1992-05-13
1993-12-07
Shepperd, John
Registers
Coded record sensors
Particular sensor structure
235463, 250566, G06K 710
Patent
active
052685624
ABSTRACT:
The present invention is directed to a system for optically scanning a bar code particularly a bar code provided on a generally transparent or translucent media through which light can be projected. In particular, the invention is directed to a system for optically scanning a bar code provided on the edge of picture film, preferably motion picture film. The system includes a light source on one side of the generally transparent media and an arrangement for moving the media past the light source such that the bar code interrupts the light and produces a modulated light signal according to the characteristics of the bar code on the opposite side of the media. An optically sensing arrangement is provided on the opposite side of the media for sensing the modulated light signal and includes at least two sensors spaced in the direction of movement of the generally transparent media. With this arrangement, the signal output of the sensors are shifted in time according to the spacing between the sensors. The system includes a processing arrangement for processing the signal output of the sensors to extract the bar code used to modulate the light passing through the generally transparent media by the signal output of the sensors. With this arrangement, accurate reading of the bar code is possible with the media moving at substantial speeds past the scanning system. This system has particular application for film, but could be used in other bar code reading applications using reflected light.
REFERENCES:
patent: 3891831 (1975-06-01), Coles, Jr.
patent: 3898689 (1975-08-01), D'Orazio et al.
patent: 3949193 (1976-04-01), Dowdell
patent: 3961164 (1976-06-01), Reed et al.
patent: 3999043 (1976-12-01), Reiss et al.
patent: 4000397 (1976-12-01), Hebert et al.
patent: 4176260 (1979-11-01), Ward et al.
patent: 4473746 (1984-09-01), Edmonds
patent: 4564929 (1986-01-01), Yonezawa et al.
patent: 4629876 (1986-12-01), Kubota et al.
patent: 4638170 (1987-01-01), Kubota
patent: 4707790 (1987-11-01), Gomes et al.
patent: 4740675 (1988-04-01), Brosnan et al.
patent: 4831609 (1989-05-01), Suzuki
patent: 4835544 (1989-05-01), Winterburn
patent: 4863173 (1989-09-01), Chen
patent: 4961086 (1990-10-01), Takenaka
Brouillette Robert
Kosie Ronald S.
National Film Board of Canada
Shepperd John
LandOfFree
Optical dual sensor bar code scanning system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical dual sensor bar code scanning system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical dual sensor bar code scanning system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2017523