Wavelength measurement apparatus
US6795196B2 · kind B2 · utility
61Cited by
7References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 15, 2002 |
| Grant date | Sep 21, 2004 |
| Priority date | — |
| Expiry date | Sep 7, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J3/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Light under measurement whose wavelength is continuously swept is incident on fiber-optic Etalon. The fiber-optic Etalon transmits the light under measurement each time the wavelength of the light under measurement satisfies specific conditions. A PD detects the transmitted light of the fiber-optic Etalon and outputs the intensity of the light under measurement. A counter counts the number of peaks of the output of the PD. A CPU calculates the wavelength of the light under measurement based on the count value of the counter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.