Optical information storage apparatus having cylindrical lens fo

Details Optical information storage apparatus having cylindrical lens fo Optical information storage apparatus having cylindrical lens fo

1998-03-17

2000-12-26

Tran, Thang V.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369110, 369 4423, G11B 709

Patent

active

061670189

ABSTRACT:
An optical information storage apparatus is constructed to include a light source, a polarization beam splitter reflecting a light beam emitted from the light source and irradiating a reflected light beam on a recording surface of a recording medium, a first part for eliminating a coma aberration which is generated due to a light beam which is reflected by the recording surface and passes through the polarization beam splitter, a second part for eliminating an astigmatism which is generated by the polarization beam splitter and the first part, and a third part for generating an astigmatism.

REFERENCES:
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patent: 5189655 (1993-02-01), Ogata et al.
patent: 5428596 (1995-06-01), Hineno et al.
patent: 5496993 (1996-03-01), Kasuga
patent: 5508992 (1996-04-01), Hirose et al.
patent: 5550798 (1996-08-01), Hineno et al.

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