Optical pickup using two-wavelength light source module

Details Optical pickup using two-wavelength light source module Optical pickup using two-wavelength light source module

2007-05-15

2007-05-15

Hindi, Nabil (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S044230

Reexamination Certificate

active

10655608

ABSTRACT:
An optical pickup using a two-wavelength light source module includes a light source module, a collimating lens, and a first optical element. The light source module includes first and second light sources which emit first and second light beams of different wavelengths and are formed in a single package. The collimating lens directs the first and/or second light beams into convergent light or divergent light so that the convergent light or the divergent light is incident on the objective lens. The optical pickup is a finite optical system due to the collimating lens. The first optical element is disposed on the traveling paths of the first and second light beams, operates as a lens only for one of the first and second light beams, and corrects a position difference between the first and second light sources along a traveling direction of light. The optical pickup further includes a second optical element which is disposed on the traveling paths of the first and second light beams and matches traveling optical axes of the first and second light beams with each other.

REFERENCES:
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patent: 6671247 (2003-12-01), Arai et al.
patent: 6680894 (2004-01-01), Hayashi et al.
patent: 6760296 (2004-07-01), Baba et al.
patent: WO98/13826 (1998-02-01), None
patent: 2000-313673 (2000-10-01), None
patent: 1020020008795 (2002-01-01), None
Chinese Patent Office Action for corresponding Chinese Patent Application No. 031566596 dated Feb. 24, 2006.

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