Laser lighting control device

Details Laser lighting control device Laser lighting control device

1994-02-16

1997-02-11

Bovernick, Rodney B.

Coherent light generators

Particular component circuitry

Optical pumping

372 33, 372 24, 250205, 2502221, 235455, H01S 300, G06K 710, H01J 4014

Patent

active

056028610

ABSTRACT:
A device suitable for a laser-type bar code reader used in a POS (point of sales) system in the distribution industry, and more particularly, to a laser lighting control device in a laser scanner device which reads a bar code using a reflection light of a laser beam. A prolonged operational life and an improved reliability of the laser light source build-in device under intermittent light on/off control is achieved by monitoring its lighting time to execute the operational life control thereof. The laser lighting control device includes a laser light source, a drive unit for performing a light on/off drive of the laser light source to control the light on/off thereof, a control unit for outputting a light on/off command to the drive unit for laser light source control, and a timer unit for measuring the total lighting time of the laser light source.

REFERENCES:
patent: 5299212 (1994-03-01), Koch et al.
M. A. Karr et al. "Output Power Stability of GaAlAs laser transmitters using optical tap for feedback control", 15 Apr. 1979, Applied Optics 18(8).

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