Condenser with first and second photodetectors with three...

Details Condenser with first and second photodetectors with three... Condenser with first and second photodetectors with three...

2007-02-13

2007-02-13

Patel, Gautam R. (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

Reexamination Certificate

active

10699855

ABSTRACT:
To provide a light receiving device, a light detecting device, and an optical signal reproducing device each of which allows one to perform many different computations in detecting aberration amounts and focus error quantities without requiring exact position relations between laser light to be received and light receiving elements, and between the light receiving elements. First and second light receiving elements43+and43−are used which receive condensed light at positions equidistantly spaced from an focal point X before and after the light images, respectively.

REFERENCES:
patent: 4873678 (1989-10-01), Nakamura et al.
patent: 5119355 (1992-06-01), Yamamoto et al.
patent: 5253237 (1993-10-01), Miyake et al.
patent: 5278401 (1994-01-01), Takishima et al.
patent: 5553050 (1996-09-01), Yang
patent: 6399932 (2002-06-01), Wals
patent: 2001/0033528 (2001-10-01), Sano et al.
patent: 2002/0057359 (2002-05-01), Tadano et al.
patent: 2003/0075669 (2003-04-01), Tadaki
patent: 0 228 620 (1987-07-01), None
patent: 10-214436 (1998-08-01), None
patent: 2000-57616 (2000-02-01), None
patent: 2000-171346 (2000-06-01), None
patent: 2002-39915 (2002-02-01), None
patent: 2002-55024 (2002-02-01), None

Affiliated with

Also associated with

Rating

Condenser with first and second photodetectors with three... does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3858423