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Summary
| Description |
English: Illustration showing how trace gases are detected in the field using a mobile dual-frequency comb laser spectrometer. The spectrometer sits in the center of a circle which is ringed with retroreflecting mirrors. Laser light from the spectrometer (yellow line) passes through a gas cloud, strikes the retroreflector and is returned directly to its point of origin. The data collected are used to identify leaking trace gases (including methane), as well as leak locations and their emission rates. |
| Date | |
| Source | https://www.nist.gov/topics/physics/optical-frequency-combs |
| Author | Stephanie Sizemore and Ian Coddington/NIST |
Licensing
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This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code.
Note: This only applies to original works of the Federal Government and not to the work of any individual U.S. state, territory, commonwealth, county, municipality, or any other subdivision. This template also does not apply to postage stamp designs published by the United States Postal Service since 1978. (See § 313.6(C)(1) of Compendium of U.S. Copyright Office Practices). It also does not apply to certain US coins; see The US Mint Terms of Use.
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| This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. | ||
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 01:25, 16 February 2022 | | 2,100 × 1,591 (361 KB) | WalkingRadiance | Uploaded a work by Stephanie Sizemore and Ian Coddington/NIST from https://www.nist.gov/topics/physics/optical-frequency-combs with UploadWizard |
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