Optical pickup apparatus and signal recording and/or...

Details Optical pickup apparatus and signal recording and/or... Optical pickup apparatus and signal recording and/or...

2006-12-26

2006-12-26

Young, Wayne (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

Reexamination Certificate

active

07154839

ABSTRACT:
While supporting an optical disc having a recording density that is higher than conventional optical discs by shortening the wavelength of the emitted light and increasing the numerical aperture (NA) of an objective lens, a reduction in the size of an optical pickup apparatus relative to the size of a disc cartridge that houses the optical disc is achieved. The present invention includes a fixed optical system having a built-in light source, and a movable optical system having an objective lens. A parallel light beam that enters the movable optical system from the fixed optical system enters the movable optical system via a light path that is parallel to the direction in which the objective lens is movable and from the side on which a spindle motor is provided.

REFERENCES:
patent: 5172356 (1992-12-01), Kibune
patent: 5546373 (1996-08-01), Koyama
patent: 5777960 (1998-07-01), Ohno
patent: 6201630 (2001-03-01), Balasubramanian
patent: 2004/0131002 (2004-07-01), Odajima et al.
patent: H07-105565 (1995-04-01), None

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