Compatible optical pickup apparatus

Details Compatible optical pickup apparatus Compatible optical pickup apparatus

2004-11-12

2008-03-11

Edun, Muhammad (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S112140, C369S112270, C369S112210, C369S044370

Reexamination Certificate

active

07342868

ABSTRACT:
A compatible optical pickup apparatus and method are provided. The apparatus and method include a first light source for generating and emitting a first light having a predetermined wavelength, a second light source for generating and emitting a second light having a wavelength different from the wavelength of the first light, a beam shaping beam splitter provided in paths of the first and second lights for shaping the first and second lights in order to change a shape of a profile of each of the first and second lights to a circular shape and change the paths of the first and second lights, an objective lens for focusing the first and second lights and forming light spots on an optical recording medium, and a main photodetector for receiving the first and second lights by being reflected from the optical recording medium and passing through the objective lens and the beam shaping beam splitter, and detecting an information signal and an error signal.

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patent: 1999-00768 (1999-01-01), None
patent: 2001-0056965 (2002-09-01), None

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