Temperature invariant infrared filter
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United States of America Patent
Stats
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Oct 22, 2019
Grant Date -
Nov 8, 2018
app pub date -
Sep 9, 2015
filing date -
Sep 15, 2014
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A narrow bandpass filter that may be used in a mid-infrared sensor for monitoring a species, which may be a component of a fluid or a solid material. The filter comprises a cavity comprising a low refractive index material. By providing a high ratio of low refractive index material in the filter with respective to high refractive index material, the filter is configured so that wavelength transmission remains constant with varying temperature. Materials used for the low and/or high refractive index provide a temperature invariant filter that transmits mid-infrared spectra without serious degradation.
First Claim
Other Claims data not available
Family
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| Country | kind | publication No. | Filing Date |
|---|---|---|---|
| GB | B | GB2530099 | Sep 15, 2014 |
| WO | A1 | WO2016048655 | Sep 09, 2015 |
| CN | B | CN107111032 | Sep 09, 2015 |
| NO | B1 | NO344896 | Mar 24, 2017 |
International Classification(s)
- 2015 Application Filing Year
- G01J Class
- 1516 Applications Filed
- 1256 Patents Issued To-Date
- 82.85 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 1 Citation Count
- G01J Class
- 32.83 % this patent is cited more than
- 6 Age
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