Optical head apparatus

Details Optical head apparatus Optical head apparatus

2007-09-18

2007-09-18

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

C369S112280, C369S112160

Reexamination Certificate

active

10856622

ABSTRACT:
The present invention is for providing optical head apparatus that can control scatter occurring at locations along the length of the optical path, when laser beam is transmitted through prism constituting the No. 1 prism structural member and the No. 2 prism structural member joined through partially reflecting face. Optical head apparatus1performs information recording, information regeneration on an optical recording medium, e.g. DVD; laser beam emitted from laser beam-emitting element is transmitted through a prism. The prism has the structure wherein triangular the No. 1 prism structural member and similarly a triangular No. 2 prism structural member are joined through partially reflecting face.

REFERENCES:
patent: 2403731 (1946-07-01), MacNeille
patent: 6014254 (2000-01-01), Cheng
patent: 6181666 (2001-01-01), Miyazaki et al.
patent: 6728193 (2004-04-01), Uchizaki et al.
patent: 2004/0264344 (2004-12-01), Ogata

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