Swing-style and high signal-to-noise ratio demodulation devices and corresponding demodulation method for the measurement of low coherence interference displacement
US8958075B2 · kind B2 · utility
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9Claims
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Key dates
| Filing date | May 28, 2012 |
| Grant date | Feb 17, 2015 |
| Priority date | — |
| Expiry date | May 28, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2207/117
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Swing-style demodulation device for measuring displacement information, including (1) a broadband light source, (2) an optical circulator, (3) GRIN lens, (4) a fixed mirror on an object under test, (5) a collimating device, (6) a rotating mirror, (7) f-θ lens, (8) a polarizer, (9) a narrow strip shaped birefringent wedge, (10) a polarization analyzer, and (11) a signal acquisition system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.