Optical pickup device and optical element used for the same

Details Optical pickup device and optical element used for the same Optical pickup device and optical element used for the same

2007-04-03

2007-04-03

Edun, Muhammad (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S112010, C369S112230, C369S044230

Reexamination Certificate

active

10647456

ABSTRACT:
An optical pickup device, comprises light sources to emit a first light flux having a wavelength λ1(380 nm<λ1<450 nm); a second light flux having a wavelength λ2(600 nm<λ2<700 nm); and a light-converging optical system. The light-converging optical system converges the first light flux on a first optical information recording medium through a protective layer having a thickness t1and the light-converging optical system converges the second light flux on a second optical information recording medium through a protective layer having a thickness t2. The light-converging optical system forms a first spot on the information recording surface of the first optical information recording medium by using N-th order diffracted light ray generated, and the light-converging optical system forms a second spot on the information recording surface of the second optical information recording medium by using M-th order (M≠N) diffracted light ray generated.

REFERENCES:
patent: 2002/0159377 (2002-10-01), Saito et al.
patent: 2003/0058776 (2003-03-01), Sakamoto
patent: 2005/0281169 (2005-12-01), Kimura et al.
patent: 2006/0039266 (2006-02-01), Kimura et al.

Affiliated with

Also associated with

Rating

Optical pickup device and optical element used for the same does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical pickup device and optical element used for the same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical pickup device and optical element used for the same will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3803055