Optical device for recording or reading data to an optical disk

Details Optical device for recording or reading data to an optical disk Optical device for recording or reading data to an optical disk

1998-09-04

2000-08-01

Yoo, Do Hyun

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 4423, 369 4437, 369 94, G02B 1300, G11B 700

Patent

active

060976918

ABSTRACT:
An optical device wherein when reading of CD is conducted, light from a first optical light source 1 is passed through a first auxiliary lens 2, an optical material 3 and an objective lens 4 to be converged onto a data recording surface 5a of CD and when reading of DVD is conducted, light from a second light source 6 is passed through a second auxiliary lens 7, the optical material 3 and the objective lens 4 to be converged onto a data recording surface 8a of DVD.

REFERENCES:
patent: 5724335 (1998-03-01), Kobayashi
patent: 5835473 (1998-11-01), Shimozono et al.
patent: 5870371 (1999-02-01), Tsuchiya et al.
patent: 5872761 (1999-01-01), Sugi et al.
patent: 5892749 (1999-04-01), Yamanaka
patent: 5901132 (1999-05-01), Choi
patent: 5933401 (1999-08-01), Lee et al.
patent: 5956312 (1999-09-01), Ishihara

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