Displacement-measuring optical scale and optical encoder...

Details Displacement-measuring optical scale and optical encoder... Displacement-measuring optical scale and optical encoder...

2005-11-18

2008-07-01

Epps, Georgia Y. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C250S23700G, C250S231130, C250S231140, C033S0010DD, C356S616000

Reexamination Certificate

active

07394062

ABSTRACT:
When a convex lens13comes close to 0-th order transmitted light T0with rotation of an optical scale11, the 0-th order transmitted light T0derived from a light beam L emitted from a light source15and transmitted through a diffraction grating12around is converged and incident on a reference position signal detection sensor14. At that time, a large output is obtained from the reference position signal detection sensor14. This signal constitutes a reference position signal. On the other hand, reflective diffracted light beams La, Lb having been reflected by the diffraction grating are detected by a diffraction light detection sensor16after interference, so that the speed and the angle etc. of the scale11are detected. In this way, the reference position signal and an incremental signal are detected at the same position on the optical scale.

REFERENCES:
patent: 5448358 (1995-09-01), Ishizuka et al.
patent: 5506681 (1996-04-01), Igaki
patent: 5671052 (1997-09-01), Kawakubo et al.
patent: 5747797 (1998-05-01), Fujita
patent: 2000-266567 (2000-09-01), None
patent: 2003-97975 (2003-04-01), None

Affiliated with

Also associated with

Rating

Displacement-measuring optical scale and optical encoder... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Displacement-measuring optical scale and optical encoder..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Displacement-measuring optical scale and optical encoder... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3968833