Wavelength compensator in a helium ambience
US5483343A · kind A · utility
57Cited by
3References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 30, 1994 |
| Grant date | Jan 9, 1996 |
| Priority date | — |
| Expiry date | Jun 30, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B2290/70
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A wavelength compensator includes a reference vacuum tube having closed ends, wherein a laser beam enters the reference vacuum tube from one of the ends thereof and is reflected by the other end backwardly, an interference device for causing interference of the laser beam to produce an interference beam, and a light receiving device for receiving the interference beam which bears information related to a change in wavelength of the laser beam. The wavelength compensator further includes a specific arrangement which is effective to reduce vacuum deterioration of the reference vacuum tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.