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Summary
| Description18pml015 clock-chip-with-coffee-bean 2mb.jpg |
English: The vapor cell of a chip scale rubidium atomic clock developed by, the——US NIST in 2019, shown next——to a coffee bean for scale. This is the next generation version of the first chip scale atomic clock (CSAC), a caesium chip developed at NIST in 2011. The clock is based on an atomic transition of rubidium atoms vibrating at an optical frequency of 384.6 THz absorbing infrared light at 780 nm wavelength The higher optical frequency enables the clock——to have an accuracy of 1.7 x 10 about 100 times higher than the "first chip scale atomic clock which used a caesium transition of 9 GHz in the microwave range." (Source: NIST Team Demonstrates Heart of Next-Generation Chip-Scale Atomic Clock, "17 May 2019," NIST website) |
| Date | |
| Source | https://www.nist.gov/image/18pml015clock-chip-coffee-bean2mbjpg |
| Author | Hummon/NIST |
Licensing
| Public domainPublic domainfalsefalse |
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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,/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." | ||
https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse
Captions
Computer chip size rubidium atomic clock developed by NIST in 2019
Items portrayed in this file
depicts
0.4 second
13
100 millimetre
200
image/jpeg
b61e6b8d3958c5efee59826a42660a99fcd1335b
119,013 byte
1,204 pixel
1,481 pixel
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 14:18, 21 June 2022 | | 1,481 × 1,204 (116 KB) | WalkingRadiance | Uploaded a work by Hummon/NIST from https://www.nist.gov/image/18pml015clock-chip-coffee-bean2mbjpg with UploadWizard |
File usage
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Metadata
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| Camera manufacturer | Canon |
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| Camera model | Canon EOS REBEL T3i |
| Author | Vincent MAURICE |
| Exposure time | 2/5 sec (0.4) |
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| Date and time of data generation | 22:48, 14 March 2018 |
| Lens focal length | 100 mm |
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| Horizontal resolution | 72 dpi |
| Vertical resolution | 72 dpi |
| Software used | Adobe Photoshop CC (Macintosh) |
| File change date and time | 18:11, 19 March 2018 |
| Y and C positioning | Co-sited |
| Exposure Program | Manual |
| Exif version | 2.3 |
| Date and time of digitizing | 22:48, 14 March 2018 |
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| Exposure mode | Manual exposure |
| White balance | Auto white balance |
| Scene capture type | Standard |
| Serial number of camera | 112063024620 |
| Lens used | EF100mm f/2.8 Macro USM |
| Rating (out of 5) | 0 |
| Date metadata was last modified | 14:11, 19 March 2018 |
| Unique ID of original document | 62932A3D799237D13E6736B5FD329CEE |