Optical pickup, optical element, optical information device,...

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

2011-08-16

2011-08-16

Huber, Paul (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S121000

Reexamination Certificate

active

08000209

ABSTRACT:
An optical pickup includes: a laser light source which outputs an divergent beam having an elliptical far-field pattern; a beam shaping element having at least one cylindrical plane and which shapes the divergent beam outputted from the laser light source into an divergent beam having a prescribed shape in which at least the length in the major axis direction of the elliptical shape is shortened; a light collecting portion having a beam splitter which perpendicularly collects the divergent beam that is outputted from the beam shaping element and which has a prescribed shape on the recording surface of an optical disk , and a mirror or the like; and a light detecting portion The optical axis of the divergent beam is rotated so that the direction in which the major axis of the divergent beam having a prescribed shape is shortened conforms to the radial direction of an optical information recording medium.

REFERENCES:
patent: 2001/0002896 (2001-06-01), Yanagisawa et al.
patent: 2004/0145997 (2004-07-01), Yasuda et al.
patent: 2005/0281170 (2005-12-01), Nagashima
patent: 2008/0163278 (2008-07-01), Wakabayashi et al.
patent: 2003-178480 (2003-06-01), None
patent: 2004-247032 (2004-09-01), None
patent: 2005-141884 (2005-06-01), None
patent: 2005-209325 (2005-08-01), None
patent: 2005-317168 (2005-11-01), None
patent: WO 2005/104110 (2005-11-01), None
Microfilm of the specification and drawings annexed to the request of Japanese Utility Model Application No. 104707/1990 (Laid-Open No. 62508/1992) (Asahi Optical Co., Ltd.), May 28, 1992, Figs. 1 to 2.
International Search Report for International Application No. PCT/JP2007/053660 dated Apr. 10, 2007.

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