Absolute position encoder obtains signals corresponding to...

Details Absolute position encoder obtains signals corresponding to... Absolute position encoder obtains signals corresponding to...

2009-04-27

2011-10-18

Luu, Thanh X (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C250S208100, C341S013000

Reexamination Certificate

active

08039786

ABSTRACT:
In an absolute position detection type photoelectric encoder devised so as to detect a pseudorandom pattern disposed on a main scale by means of a plurality of imaging optical systems, assembling of the absolute position detection type photoelectric encoder is facilitated and production cost thereof is reduced by providing: a single light-receiving array element disposed on the imaging surfaces of the imaging optical systems, which incorporates a greater light-receiving array portion in the length measurement direction than the light-receiving range of the respective imaging optical systems; a window signal storing portion for storing a window signal showing a light-receiving range of the respective imaging optical systems; and a window signal comparison portion for obtaining signals corresponding to individual imaging ranges by comparing scanning signals of the light-receiving array element with window signals.

REFERENCES:
patent: 3096441 (1963-07-01), Burkhardt
patent: 4439672 (1984-03-01), Salaman
patent: 4469417 (1984-09-01), Masunaga et al.
patent: 4870559 (1989-09-01), Hyatt
patent: 2007/0051884 (2007-03-01), Romanov et al.
patent: A-2007-218691 (2007-08-01), None

Affiliated with

Also associated with

Rating

Absolute position encoder obtains signals corresponding to... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Absolute position encoder obtains signals corresponding to..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Absolute position encoder obtains signals corresponding to... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4275060