Hand held laser bar code reader with safety shutoff responsive t

Details Hand held laser bar code reader with safety shutoff responsive t Hand held laser bar code reader with safety shutoff responsive t

1986-02-27

1987-06-09

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

235472, 219121LB, G06K 710

Patent

active

046722157

ABSTRACT:
A hand held laser bar code reader includes a motion sensor and associated circuitry to disable energization of the laser unless the bar code reader has just undergone some degree of motion. This safety feature avoids the possibility of the bar code reader's being held motionless for a long enough time to cause retinal damage to a human eye.

REFERENCES:
patent: 4387297 (1983-06-01), Swartz et al.
patent: 4496831 (1985-01-01), Swartz et al.
patent: 4575625 (1986-03-01), Knowles

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