Optoelectronic device

Details Optoelectronic device Optoelectronic device

2006-06-20

2006-06-20

Amari, Alessandro (Department: 2872)

Optical: systems and elements

Diffraction

From grating

C369S112040

Reexamination Certificate

active

07064898

ABSTRACT:
An optoelectronic device that provides an excellent reproduction signal and a stable servo control while preventing deterioration of S/N ratio caused by stray light. The optoelectronic device has a semiconductor laser (101) that emits light beams on an information-recording medium (105), a hologram optical element (102) having a diffraction grating region (108) and located between the semiconductor laser (101) and the information-recording medium (105), and a photodetector (106) for receiving light that is diffracted at the diffraction grating region (108) of the hologram optical element (102), among returning light beams from the information-recording medium (105), and the optoelectronic device has also a diffraction grating region (107) in the vicinity of the diffraction grating region (108) of the hologram optical element (102) so as to prevent stray light other than diffracted light from the diffraction grating region (108) from entering the photodetector (106).

REFERENCES:
patent: 5391865 (1995-02-01), Kurata et al.
patent: 5555334 (1996-09-01), Ohnishi et al.
patent: 5687153 (1997-11-01), Komma et al.
patent: 5790504 (1998-08-01), Hayashi et al.
patent: 6084710 (2000-07-01), Katsuma
patent: 6154433 (2000-11-01), Hoshino et al.
patent: 6327110 (2001-12-01), Sano et al.
patent: 6388977 (2002-05-01), Sakai et al.
patent: 2-79230 (1990-03-01), None
patent: 2-193333 (1990-07-01), None
patent: 4-95233 (1992-03-01), None
patent: 4-349687 (1992-12-01), None
patent: 5-226676 (1993-09-01), None
patent: 6-243502 (1994-09-01), None
patent: 9-102650 (1997-04-01), None
patent: 10-208275 (1998-08-01), None
patent: 10-255309 (1998-09-01), None
patent: 10-300913 (1998-11-01), None

Affiliated with

Also associated with

Rating

Optoelectronic device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optoelectronic device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optoelectronic device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3628077