Reflective light beam focusing device with multiple focal points

Details Reflective light beam focusing device with multiple focal points Reflective light beam focusing device with multiple focal points

1998-03-11

2000-07-04

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 4437, 369 4423, G11B 7135, G11B 712

Patent

active

060848421

ABSTRACT:
A multiple focal light beam generating device is provided with a multiple focal mirror device, to which a light beam is incident from a front side thereof. The device has a plurality of mirror surfaces arranged in serial to the incident light beam such that at least one mirror surface other than a mirror surface disposed farthest from the front side comprises a half mirror surface, for reflecting the incident light beam respectively at each of the mirror surfaces into directions different from each other as a plurality of partial light beams; and a light condensing device, to which the partial light beams are inputted from the multiple focal mirror device, for respectively condensing the partial light beams such that positions of maximally condensed points of the partial light beams are different from each other.

REFERENCES:
patent: 4460989 (1984-07-01), Russell
patent: 5173603 (1992-12-01), Lindaccher
patent: 5311495 (1994-05-01), Ando
patent: 5425016 (1995-06-01), Sutker
patent: 5532997 (1996-07-01), Pauli
patent: 5790327 (1998-08-01), Lee et al.
patent: 5886970 (1999-03-01), Tachibana et al.

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