Passive optical wavelength analyzer with a passive nonuniform optical grating
US5760391A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 17, 1996 |
| Grant date | Jun 2, 1998 |
| Priority date | — |
| Expiry date | Jul 17, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/4215
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An optical sensor grating in a fiber-optic experiences a measurable parameter, such as strain, pressure and/or temperature. A passive nonuniform optical grating receives a light signal reflected by the optical sensor grating and spread out by a lens. A photodiode array behind the passive nonuniform optical grating senses a light intensity distribution of the reflected light signal. A microprocessor employs a simple peak detection algorithm to detect a maximum or minimum intensity of the reflected light signal at the photodiode array, and correlates the location of the maximum or minimum intensity to the measurable parameter experienced by the optical sensor grating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.