Acousto-optical intensity control of laser beam during etching o

Details Acousto-optical intensity control of laser beam during etching o Acousto-optical intensity control of laser beam during etching o

1992-06-10

1994-01-18

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Utilizing plasma, electric, electromagnetic, particulate, or...

21912161, 21912169, 264 14, 264 25, 264 401, B23K 2610, G11B 726, B29D 1700

Patent

active

052797759

ABSTRACT:
The intensity of a beam of light used to etch concentric servo tracks on a magnetic medium is adjusted with an acousto-optical device to maintain a substantially constant energy density delivered by the beam while the optics which generate the beam move radially of the disk.

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