Rotary encoder having a plurality of beams emitted by a diffract

Details Rotary encoder having a plurality of beams emitted by a diffract Rotary encoder having a plurality of beams emitted by a diffract

1990-05-23

1992-03-31

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250237G, 356356, G01D 534

Patent

active

051011026

ABSTRACT:
A rotary encoder wherein coherent beams are caused to be incident at different positions of a diffraction grating mounted on a rotary object, different beams diffracted from the diffraction grating are caused to overlap and form interference fringes, the fringes are detected by a light receiving detector to detect a rotational state of the rotary object, and the parallelism a of the rotary object satisfies the following inequality:

REFERENCES:
patent: 3726595 (1973-04-01), Matsumoto
patent: 3738753 (1973-06-01), Huntley, Jr.
patent: 3756723 (1973-09-01), Hock
patent: 3842261 (1974-10-01), MacGovern et al.
patent: 3891321 (1975-06-01), Hock
patent: 3983391 (1976-09-01), Clemons
patent: 4629886 (1986-12-01), Akiyama et al.
patent: 4676645 (1987-06-01), Taniguchi et al.

Affiliated with

Also associated with

Rating

Rotary encoder having a plurality of beams emitted by a diffract does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Rotary encoder having a plurality of beams emitted by a diffract, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rotary encoder having a plurality of beams emitted by a diffract will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2261273