Optical head apparatus

Details Optical head apparatus Optical head apparatus

1988-02-12

1989-12-19

Psitos, Aristotelis M.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369120, 369112, G11B 700

Patent

active

048887609

ABSTRACT:
In case that the light beam emitted from a light source mounted on a base element is focused to a spot light on a data storage media to write the data, when the light beam reflected from the data storage media to return to the light source is reflected from the base element and focused again on the data storage media, it becomes difficult to precisely read/write the data on the storage media. In order to resolve the above problem, a light beam treating means is provided in the base element to prevent the re-incident light beams from being reflected toward the data storage media and focused thereon.

REFERENCES:
patent: 3855546 (1974-12-01), Carr
patent: 4366492 (1982-12-01), Kitamura
patent: 4488304 (1984-12-01), Shimizu et al.
patent: 4520472 (1985-05-01), Reno
"Mitsubishi Denki Technical Bulletin", vol. 58, No. 11, p. 742, 1984 copy provided by applicants.
The Nikkei Mechanical, p. 68, Jul. 5, 1982, copy provided by applicants.
English translation of JP 58-207689 provided by PTO translation branch.

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