Covert sensor
US10274587B2 · kind B2 · utility
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1References
20Claims
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Assignee
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Key dates
| Filing date | Jan 19, 2018 |
| Grant date | Apr 30, 2019 |
| Priority date | — |
| Expiry date | Jan 19, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S17/36
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system for covert sensing. A broadband light source is split into two portions, a first portion of which illuminates a target, and a second portion of which is frequency shifted, e.g., by an acousto-optic frequency shifter. Light reflected from the target is combined with the frequency shifted light, detected, and demodulated with an in-phase and quadrature demodulator. The outputs of the demodulator are filtered and the arc tangent of the ratio is calculated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.