Optical encoder used for position detection based upon a plurali

Details Optical encoder used for position detection based upon a plurali Optical encoder used for position detection based upon a plurali

1996-01-22

1998-05-12

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250237G, H01J 4014, G01D 536

Patent

active

057509840

ABSTRACT:
An optical encoder comprising a first scale and photo sensitive elements that shift relative to the first scale along the length of the first scale for determining a relative position based on a plurality of signals having a predetermined phase difference from the photo sensitive elements. The optical encoder comprises groups of photo sensitive elements, wherein each group comprising a plurality of photo sensitive elements arranged side by side in the direction of the length, and wherein each photo sensitive element has a width corresponding to the width of the pattern of the first scale. The groups of photo sensitive elements corresponds respectively to the plurality of signals. The photo sensitive elements belonging to one photo sensitive element group and the photo sensitive elements belonging to the other photo sensitive element group are arranged side by side in a mixed fashion in the direction of the length. One photo sensitive element group and the other photo sensitive element group are arranged so that the signal derived from the one photo sensitive element group and the signal derived from the other photo sensitive element group have a predetermined phase difference therebetween.

REFERENCES:
patent: 5059791 (1991-10-01), Ishizuka et al.
patent: 5569913 (1996-10-01), Ishizuka et al.
patent: 5572019 (1996-11-01), Sakuma

Affiliated with

Also associated with

Rating

Optical encoder used for position detection based upon a plurali 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 encoder used for position detection based upon a plurali, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical encoder used for position detection based upon a plurali will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-982715