Scanning system having automatic laser shutdown upon detection o

Details Scanning system having automatic laser shutdown upon detection o Scanning system having automatic laser shutdown upon detection o

1989-07-28

1991-04-02

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

235472, 21912162, H01J 314

Patent

active

050049160

ABSTRACT:
A scanning system having a motor-driven scanning element automatically shuts down a scanning laser when the motor is either inoperative or operating below a safe speed. A microprocessor already used to drive the scanning circuitry is also used to control the operation of the motor, including commutation logic, and also controls the automatic laser shut-down. This results in a significant reduction of power requirement.

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