Digital laser encoder/recorder/player, utilizing ellipsoidal mem

Details Digital laser encoder/recorder/player, utilizing ellipsoidal mem Digital laser encoder/recorder/player, utilizing ellipsoidal mem

1994-02-28

1995-06-13

Popek, Joseph A.

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

369100, 369103, 369283, 369284, G11B 700

Patent

active

054250161

ABSTRACT:
A rotatable memory medium having a memory surface of ellipsoid surface defining two foci. A laser beam is directed to one focus and then reflected to the memory surface, and from the latter to the other focus where a sensor is positioned. The memory surface has a memory track of spiral shape, and the laser beam reflected to the memory surface is so reflected by a T-mirror, and the source of the laser beam remains stationary. The ellipsoid memory surface assumes a plurality of different shapes, such as one-half of an ellipsis on one side of a plane containing both foci, or generated about either an internal axis or an external axis.

REFERENCES:
patent: 5177717 (1993-01-01), Sato et al.
patent: 5224090 (1993-06-01), Umeda et al.

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