Optical pickup including a many-sided reflection prism and...

Details Optical pickup including a many-sided reflection prism and... Optical pickup including a many-sided reflection prism and...

2007-02-13

2007-02-13

Psitos, A M (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C359S834000

Reexamination Certificate

active

10141774

ABSTRACT:
An optical pickup including a many-sided reflection prism formed as a single body with a plurality of reflection faces to guide a light beam incident through a transmission face in a horizontal direction perpendicular to a height direction by reducing a size of the light beam in the height direction, by using a difference in angles between the reflection faces, and to reflect the guided light beam in the height direction by one reflection face of an angle less than 45° with respect to the horizontal direction. By using the many-sided reflection prism, the height of an optical system can be reduced regardless of the wavelength used without reducing light beam size. Thereby, slim-sized optical pickups can be implemented.

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patent: 6327238 (2001-12-01), Nishiwaki et al.
patent: 6650469 (2003-11-01), Kim et al.
patent: 2002/0172133 (2002-11-01), Kim et al.
patent: 06-302005 (1994-10-01), None
patent: 6-302005 (1994-10-01), None
patent: 7-21580 (1995-01-01), None
patent: 11-134701 (1999-05-01), None
MAT (machine assisted translation) of JP 06-302005.
MAP (machine assisted translation) of JP 07-021580.

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