Optics: measuring and testing – By polarized light examination – With light attenuation
Patent
1982-02-05
1985-09-24
Rosenberger, R. A.
Optics: measuring and testing
By polarized light examination
With light attenuation
356356, G01B 900
Patent
active
045429898
ABSTRACT:
A position encoder including a holographically recorded, single-frequency, phase grating. When this phase grating is illuminated by a spatially coherent light source, it acts as a basic common path interferometer and constitutes a highly efficient source of high contrast, stable, interference fringe patterns. In the position encoder, a carrier moves the grating in a plane that is orthogonal to an axis from the light source. Motion of the carrier is detected as the fringe pattern moves past detecting means thereby to sense motion and provide position information in the form of electrical signals.
REFERENCES:
patent: 3900264 (1975-08-01), Heitmann et al.
patent: 4025197 (1977-05-01), Thompson
patent: 4265534 (1981-05-01), Remijan
patent: 4395124 (1983-07-01), Remijan
Randwal Instrument Co., Inc.
Rosenberger R. A.
LandOfFree
Apparatus for position encoding 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 position encoding, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for position encoding will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1611416