Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1985-11-27
1987-03-24
Laroche, Eugene R.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
250234, 358292, 358293, H01J 516, H04N 112
Patent
active
046527435
ABSTRACT:
An optical reader with a reading head including first optical fibers for transmitting light beams from an emitter to emit light beams from their first ends to irradiate corresponding illumination spots on a medium, and further including second optical fibers having first ends which are located adjacent to the first ends of the respective first optical fibers and which receive the beams reflected from corresponding reflection spots on the medium, for transmitting the reflected beams to a light-sensitive device. The first and second optical fibers constitute plural reading units, and their first ends constitute their image-reading portions. The light-sensitive device produces a signal indicating a light reflectance in an overlapping spot where the illumination spot overlaps the reflection spot. The image-reading portions are spaced apart at a pitch sufficient to prevent the illumination spot of one of the reading units from overlapping the reflection spot of the adjacent reading unit. The reading head and the medium are moved relative to each other to move the overlapping spot to read the images on the medium. The light emitter and light-sensitive device are controlled so as to read each reading spot each time the moving overlapping spot is aligned with the reading spot.
REFERENCES:
patent: 3622793 (1971-11-01), Dalton
patent: 4266250 (1981-05-01), Heinzl et al.
patent: 4523235 (1985-06-01), Rajchman
Harano Tetsuo
Ohta Eiichi
Brother Kogyo Kabushiki Kaisha
LaRoche Eugene R.
Lee James C.
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