Dithering optical data logger

Details Dithering optical data logger Dithering optical data logger

1988-12-02

1990-11-20

Psitos, Aristotelis M.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

346 76L, 346108, 358342, 369 4439, 369109, 369116, G11B 785, G11B 709

Patent

active

049723979

ABSTRACT:
A data logger which incorporates a laser diode and focusing optics for logging data pits in optical recording media. The focusing optics may be attached to a spring assembly and caused to oscillate by electromagnetic or mechanical means. As the optical elements oscillate, the focused beam dithers above and below the surface of the recording media. When the laser beam focal region is in the plane of the recording surface a pit or deformation is formed in the surface. Relative motion is provided between the recording surface and the laser beam spot for further writing on the recording surface.

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patent: 4451915 (1984-05-01), LaBudde et al.
patent: 4458980 (1984-07-01), Ohki et al.
patent: 4466087 (1984-08-01), Cheng
patent: 4544835 (1985-10-01), Drexler
patent: 4644516 (1987-02-01), Musha

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