Method of using a single pick-up head to read and store data on

Details Method of using a single pick-up head to read and store data on Method of using a single pick-up head to read and store data on

1996-07-23

1997-08-19

Edun, Muhammad N.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 4414, 369109, 369118, G11B 712

Patent

active

056595336

ABSTRACT:
A method of using a single pick-up head to read and store data in discs of different thickness, especially for CD (compact disc) and DVD (digital versatile disc), the method including the step of adjusting the electronic aperture ring to change the numerical aperture, and change the distance between the disc and the object lens subject to type of the disc used.

REFERENCES:
patent: 5408453 (1995-04-01), Holtslag et al.
patent: 5487060 (1996-01-01), Rosen et al.
patent: 5499231 (1996-03-01), Fennema et al.

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