Device for reading spectral lines contained in an optical spectrum

US6639681B1 · kind B1 · utility

Assignee

• COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES · FR

Inventors

• Sylvain Magne · Orvault, FR
• Pierre Ferdinand · Houilles, FR
• Gilles Grand · Grenoble, FR

Key dates

• Filing date: Mar 13, 2000
• Grant date: Oct 28, 2003
• Expiry date: Mar 13, 2020

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B2006/12164
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

This device comprises a device (DD) for demultiplexing these lines in terms of wavelength, a device (DM) for measuring, by filtering, the wavelengths of the demultiplexed lines, comprising, for each of these lines, a measuring channel (VM) provided with a filter and a reference channel (VR), and means (MP) for the photodetection, for each line, of the light intensity transmitted by the corresponding measuring and reference channels. The wavelength of each of these lines is determined by calculating the ratio of the intensities thus detected. Application to the monitoring of structures.