Objective lens and method of manufacturing optical pickup...

Details Objective lens and method of manufacturing optical pickup... Objective lens and method of manufacturing optical pickup...

2007-05-18

2010-12-07

Young, Wayne R (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S044320, C369S112230

Reexamination Certificate

active

07848186

ABSTRACT:
An objective lens focusing light emitted from a light source onto an information surface of an optical disk, comprising: a first lens surface to be positioned on the light-source side; a second lens surface to be positioned on the optical-disc side; a first edge surface to be positioned on the light-source side, provided in an outer region of the first lens surface; and a second edge surface to be positioned on the optical-disc side, provided in an outer region of the second lens surface, a first optical axis of the first lens surface coinciding with a second optical axis of the second lens surface, the first optical axis and the second optical axis being orthogonal to the second edge surface.

REFERENCES:
patent: 5453962 (1995-09-01), Fujita et al.
patent: 5532987 (1996-07-01), Fujita et al.
patent: 5864525 (1999-01-01), Takeshita et al.
patent: 2005/0007906 (2005-01-01), Horinouchi et al.
patent: 8-075597 (1996-03-01), None

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