Apparatus for measuring displacement

Details Apparatus for measuring displacement Apparatus for measuring displacement

1997-01-21

1999-03-30

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

25023116, 356356, 356373, 257569, 33707, G01B 1100, G01D 5347, G02B 518

Patent

active

058892800

ABSTRACT:
A transmission type encoder is disclosed, which comprises a main scale, a light source that radiates collimated light to the main scale, and a photodiode array that also functions as an index scale. The main scale has a rectangular grating in which light transmitting portions and light non-transmitting portions are arranged at pitch P, and each width of the light transmitting portions is set to 2p/3, whereby a third harmonic distortion in an output signal can be removed.

REFERENCES:
patent: 4782229 (1988-11-01), Ernst
patent: 5068530 (1991-11-01), Ieki et al.
patent: 5572019 (1996-11-01), Sakuma
patent: 5574559 (1996-11-01), Kaneda et al.
patent: 5576537 (1996-11-01), Holzapfel et al.
patent: 5604345 (1997-02-01), Matsuura
patent: 5657125 (1997-08-01), Kato et al.
patent: 5748373 (1998-05-01), Hane et al.
patent: 5750984 (1998-05-01), Ieki
patent: 5774219 (1998-06-01), Matsuura

Affiliated with

Also associated with

Rating

Apparatus for measuring displacement does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1216953