Body position sensor by phase comparison of modulated light waves transmitted through optical fiber
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 19, 1991
Issued Date -
N/A
app pub date -
Aug 21, 1990
filing date -
Apr 21, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An optical position sensor for indicating the position of a movable body with respect to a reference point. A first optical signal at one wavelength and a second optical signal at a different wavelength, both modulated at a radio frequency, are transmitted through an optical fiber to the reference point at which a semi-reflecting mirror which passes the first signal and reflects the second signal is disposed. The first signal is reflected by the body into the optical fiber, and a phase comparator coupled to the fiber compares the phases of the modulating signals on the reflected first signal and the reflected second signal to determine the position of the body relative to the mirror.
First Claim
Family
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully