Method and apparatus for laser beam drift compensation

Details Method and apparatus for laser beam drift compensation Method and apparatus for laser beam drift compensation

1992-10-15

1994-05-24

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

2191218, H01J 314

Patent

active

053151119

ABSTRACT:
A method and apparatus for laser beam drift compensation. A portion of the laser beam is split off and focused onto a photocell through a reticle. As the laser beam scans the reticle, the actual position of the laser beam is determined and compared with its anticipated position. Compensation is made for any deviation in the beam position in a closed-looped manner to provide accurate optical alignment of the laser beam to the workpiece.

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