Optical scanner having controllable light sources

Details Optical scanner having controllable light sources Optical scanner having controllable light sources

1991-01-31

1992-12-01

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250236, G06K 710

Patent

active

051681676

ABSTRACT:
A scanner for reading indicia on a member, surface, sheet, or similar object. Several laser diodes are used to separately generate laser beams which are scanned across the member as separate beams. The light spots produced by the beams on the member are not coincident with each other. Light reflected from the scanned member is imaged onto a linear CCD array which combines or integrates the reflected light produced by each spot to produce the resulting data for the corresponding location. Controlling the output of the laser diodes can customize the overall wavelength of the scanning light and the energy profile of the light across the scan. Some component tolerances of the system are reduced because less than the entire light spot is used to illuminate an area imaged onto the CCD sensors.

REFERENCES:
patent: 4414583 (1983-11-01), Hooker, III
patent: 4424442 (1984-01-01), Kitamura
patent: 4547038 (1985-10-01), Mori
patent: 4647145 (1987-03-01), Maeda et al.
patent: 4797558 (1989-01-01), West
patent: 4924321 (1990-05-01), Mijagawa et al.
patent: 4933549 (1990-06-01), Fujioka et al.
patent: 4978849 (1990-12-01), Goddard et al.
patent: 5006704 (1991-04-01), Mochizuki et al.
patent: 5053619 (1991-10-01), Arimoto et al.

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