False null prevention in optical delay line calibration
US6018701A · kind A · utility
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25Claims
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Key dates
| Filing date | Sep 2, 1997 |
| Grant date | Jan 25, 2000 |
| Priority date | — |
| Expiry date | Sep 2, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/2861
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method and apparatus for preventing false nulls in an optical delay line by causing the input optical beam to be frequency modulated or variably time delayed so that the components of the optical signal in the output cannot be of equal magnitude and of opposite phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.