Optical pickup apparatus

Details Optical pickup apparatus Optical pickup apparatus

2011-03-29

2011-03-29

Edun, Muhammad N (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S112220, C369S044240, C369S044410

Reexamination Certificate

active

07916611

ABSTRACT:
A light blocking unit includes a plate-like member which is different from a housing member, and a light blocking portion formed on the plate-like member, for blocking light. A light detector has a light receiving portion for receiving light which is partitioned into four divided regions, by a Y-axis-wise parting line and an X-axis-wise parting line in X-Y coordinates, and outputs photoelectric output signals for the respective divided regions in accordance with intensity of the light received by the respective divided regions of the light receiving portion. Of light beams emitted from a polarization beam splitter, a part of the light beams are blocked by the light blocking unit while the other part of the light beams are not blocked and thus emitted to the light detector excluding a region defined by two sides parallel to the parting lines.

REFERENCES:
patent: 6275463 (2001-08-01), Nagata et al.
patent: 7800986 (2010-09-01), Kobayashi et al.
patent: 2009/0238051 (2009-09-01), Nishiwaki et al.
patent: 2-126429 (1990-05-01), None
patent: 11-513835 (1999-11-01), None
patent: 2003-203368 (2003-07-01), None
patent: WO-2007/046207 (2007-04-01), None

Affiliated with

Also associated with

Rating

Optical pickup apparatus 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 apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical pickup apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2650575