Optical pickup, optical information recording device,...

Details Optical pickup, optical information recording device,... Optical pickup, optical information recording device,...

2011-04-19

2011-04-19

Haley, Joseph (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S044370

Reexamination Certificate

active

07929402

ABSTRACT:
An optical pickup includes: an objective lens that collects a first beam and a second beam and emits the first and second beam toward an optical information recording medium on which information can be recorded as a recording mark as a result of being exposed to the first beam; a section that drives the objective lens to focus the second beam on a reflection layer formed on the optical information recording medium, the reflection layer at least partly reflecting the second beam; and a section that changes the convergence state of the first beam to position a focal point of the first beam a distance away from a focal point of the second beam in the direction of depth in order to place the focal point of the first beam at a target depth.

REFERENCES:
patent: 5024927 (1991-06-01), Yamada et al.
patent: 6574174 (2003-06-01), Amble et al.
patent: 6738324 (2004-05-01), Saimi et al.
patent: 04-301226 (1992-10-01), None
patent: 07-021565 (1995-01-01), None
patent: 2001-093162 (2001-04-01), None
patent: 2001-307344 (2001-11-01), None
patent: 2006-012244 (2006-01-01), None
patent: 2006-092657 (2006-04-01), None
patent: 2006-107668 (2006-04-01), None

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