Laser diode control circuitry

Details Laser diode control circuitry Laser diode control circuitry

1983-02-28

1986-12-23

Sikes, William L.

Coherent light generators

Particular beam control device

Optical output stabilization

H01S 313

Patent

active

046317260

ABSTRACT:
Circuitry for control of the level of light output from a laser diode that is adapted to direct its light output to a resonant scanning mirror including a biasing current circuit portion for providing a current level for the laser diode at a desired set point and a circuit portion connected to the laser diode which reduces the current through the laser diode by an amount that is inversely proportional to the velocity of the scanning mirror so the amount of light energy received from the scanning mirror at any portion of a scan surface covered by the scanning mirror will be the same when the laser diode is on. Another circuit portion is also connected directly to the laser diode to selectively reduce the current through the laser diode to a level that is below the laser diode threshold current in accordance with binary signals supplied to such circuit portion.

REFERENCES:
patent: 4504976 (1985-03-01), Beaudet

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