Loss compensation for distributed sensing in downhole environments
US-9488531-B2 · Nov 8, 2016 · US
Interferometric Rotary Encoder
US2016349086A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016349086-A1 |
| Application number | US-201514723929-A |
| Country | US |
| Kind code | A1 |
| Filing date | May 28, 2015 |
| Priority date | May 28, 2015 |
| Publication date | Dec 1, 2016 |
| Grant date | — |
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Abstract
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A precision optical encoder that utilizes interferometric measurements of displacement to provide angle measurements using a laser which is injection locked to a reference laser having a secondary optical frequency which has been verified with respect to a primary optical frequency standard. The encoder shape encodes distance to rotation angle. By utilizing a laser source locked to a reference laser having a standardized (i.e., verified) secondary optical frequency for fundamental measurements of the encoder surface and real-time interferometer measurements, the encoder reports rotation angle measurements that are directly traceable to a primary optical frequency standard through the injected secondary optical frequency.
First claim
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1 . An interferometric rotary encoder comprising: a rotatable component; a measurement laser that produces light which impinges on the rotatable component; and means for determining an angular position of said rotatable component by interferometric measurements using at least light returned from the rotatable component. 2 . The interferometric rotary encoder as recited in claim 1 , wherein the measurement laser is injection locked to a reference laser having a verif…
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- G01D5/35303Primary
Physics · mapped topic
- G01D5/266Primary
Physics · mapped topic
Physics · mapped topic
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- What does patent US2016349086A1 cover?
- A precision optical encoder that utilizes interferometric measurements of displacement to provide angle measurements using a laser which is injection locked to a reference laser having a secondary optical frequency which has been verified with respect to a primary optical frequency standard. The encoder shape encodes distance to rotation angle. By utilizing a laser source locked to a reference …
- Who is the assignee on this patent?
- Boeing Co
- What technology area does this patent fall under?
- Primary CPC classification G01D5/35303. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Thu Dec 01 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).