Optical system and optical pickup apparatus therewith

Details Optical system and optical pickup apparatus therewith Optical system and optical pickup apparatus therewith

2005-04-05

2005-04-05

Epps, Georgia (Department: 2873)

Optical: systems and elements

Lens

Including a nonspherical surface

C369S044140, C369S112230

Reexamination Certificate

active

06876502

ABSTRACT:
An optical pickup apparatus is capable of recording data in and/or reproducing data from recording mediums with different formats by using one single optical system. The optical pickup apparatus includes an optical system, wherein a filtering surface that transmits or reflects wavelengths from different rays coats the peripheral portion of the center portion of an input surface and the peripheral portion of the center of an output surface. A transmitting surface having a conical shape is disposed in a central portion of the input surface and projected inwardly or outwardly with respect to the input surface. Therefore, the optical pickup apparatus can be applied to different recording mediums using rays having different wavelengths and a lightweight, small optical pickup apparatus can be implemented by using one single optical system.

REFERENCES:
patent: 20020136146 (2002-09-01), Lee et al.
patent: 20020136147 (2002-09-01), Matsui
patent: 1998-056227 (1998-09-01), None

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