Optical pickup system and information recording and/or...

Details Optical pickup system and information recording and/or... Optical pickup system and information recording and/or...

2005-06-03

2008-12-16

Criado, Jorge L Ortiz (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S112210

Reexamination Certificate

active

07466643

ABSTRACT:
An optical pickup system includes a first light source emitting first light beams with a first wavelength, a second light source emits second light beams with a second wavelength greater than the first wavelength, a third light source emits third light beams with a third wavelength greater than the second wavelength, a composite prism comprising a first prism facing the first and second light sources, a second prism facing the third light source, and a third prism for receiving the first, second and third light beams from the first and second prisms, the first prism has a surface facing the first and second light sources, the surface defines first and second regions, the second region has an aspherical surface to compensate aberration of the second light beams, a collimating lens and objective lens disposed in a common optical path for transmitting the three light beams from the composite prism.

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patent: 2003/0235137 (2003-12-01), Nishioka et al.

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