IR Fourier Spectrometer for Differential Detection: Design, Prototype end Results
Abstract
This report presents the theoretical basis and validation measurements supporting a new configuration of Fourier-transform IR spectrometer optimized for differential detection. The optimized configuration exploits the optical subtraction capabilities of a double beam Michelson interferometer to achieve the suppression of the spectral background. The resulting configuration is a fully symmetrical FTIR double beam interferometer with a peculiar beamsplitter assembly. Results obtained with a prototype indicate a high level of suppression with a residual usually smaller than 2% In the spectral range from 3.5 to 15 pm. Finally, It is shown that such a spectrometer configuration allows a permanent radiometric calibration which represents a definitive advantage over conventional FTIR Instruments.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1998
- Accession Number
- ADA637717
Entities
People
- Jean-marc Theriault