Optical temperature compensation of spectral modulation sensors by spectrographic interrogation having a dispersive element
Patent 5401958 Issued on March 28, 1995. Estimated Expiration Date: 
September 8, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
September 8, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesFiber optic sensor with light sampling for referencing Optical measuring device using a spectral modulation sensor having an optically resonant structure Optical sensing apparatus for detecting linear displacement of an object and method of operation thereof with detector matrix and centroid detection Fabry-Perot readout technique using wavelength tuning Patent #: 5276501 InventorApplicationNo. 118361 filed on 09/08/1993US Classes:250/227.23, With spectral frequency/wavelength discrimination250/226Color (e.g., filter or spectroscope)ExaminersPrimary: Nelms, David C.Assistant: Te, Que T. Attorney, Agent or FirmInternational ClassH01J 005/16AbstractAn optical temperature compensation system for spectral modulation sensors includes a light director for receiving excitation light, a spectral modulation sensor for receiving and modulating a first portion of the excitation light from the light director, and an optical processing component for receiving and determining properties of a second portion of the excitation light from the light director and the modulated first portion of the excitation light. The optical processing component comprises a dispersive element for dispersing the second portion of the excitation light and the modulated first portion of the excitation light and a charge transfer device for converting the dispersed portions of light into electrical signals. A digital signal processor calculates a detected ratio of the electrical signals which compensates for inaccuracies in measurement due to source temperature variations.Other References
Field of SearchWith spectral frequency/wavelength discriminationCausing light spectral frequency/wavelength change Color (e.g., filter or spectroscope) With light chopping or modulation Condition responsive light guide (e.g., light guide is physically affected by parameter sensed which results in light conveyed to the photocell) With coherent interferrometric light Aircraft structure Model of structure to determine structure properties Varied in response to specimen condition other than failure Varied according to predetermined pattern | |
