Beam diameter expansion of a multi-beam optical information syst

Details Beam diameter expansion of a multi-beam optical information syst Beam diameter expansion of a multi-beam optical information syst

1992-10-16

1994-10-04

Dzierzynski, Paul M.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369112, 369110, 369 13, 369 4411, 360114, G11B 700

Patent

active

053532740

ABSTRACT:
A plural-beam optical head is constituted by a monolithic semiconductor laser array having a plurality of light emitting points, a collimator lens for collimating laser beams emitted from the plurality of light emitting points, an objective lens for imaging the laser beams on an optical information recording medium, and a device for expanding the diameters of the laser beams in the direction of arrangement of the plurality of light emitting points. In the plural optical head, the following condition is satisfied:

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