Wavelength detector
US6243163A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 17, 1999 |
| Grant date | Jun 5, 2001 |
| Priority date | — |
| Expiry date | Sep 17, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J3/28
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention can accurately detect a wavelength of a light to be detected, which is output from a source of light to be detected, without an error even if there is a change in the characteristic of a spectroscope due to an individual difference among the spectroscopes or a change in the measuring environment. The device according to the invention emits at least two reference lights (Ln, La) having different wavelengths (.lambda.n, .lambda.a) as the reference lights by reference light source. And, actual characteristic value (D) of spectroscope is calculated on the basis of detection positions (Sn, Sa) of the at least two reference lights (Ln, La) on a sensor and the known wavelengths (.lambda.n, .lambda.a) of the at least two reference lights (Ln, La) (D=(.lambda.a-.lambda.n)/(Sa-Sn)). And, on the basis of the detection positions (Sn, SO) of the reference light (Ln) and the light to be detected (LO) on the sensor (10), the calculated actual characteristic value (D) of the spectroscope and the known wavelength (.lambda.n) of the reference light (Ln), wavelength (.lambda.O) of the light to be detected (LO) is calculated (.lambda.O=.lambda.n+(SO-Sn).multidot.D).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.