2.2 - A Low-Cost Spectrometer Based on Stress-Induced Birefringence
- AMA Conferences 2017
2017-05-30 - 2017-06-01
- Proceedings IRS² 2017
- I2 - Spectroscopy and Gas Analysis
- F. Dietachmayr, S. Schallmeiner, B. Zagar - JKU Linz (Austria)
- 769 - 773
Optical spectrometry is widely used in industrial and scientific contexts. Fourier transform spectrometers have since their invention gradually replaced classical, dispersion based spectrometers. Their advantages are higher luminous efficiency and better wavenumber precision. Conversely, disadvantages are their high cost and stringent mechanical requirements. This paper presents a novel approach on spectroscopy using a stress induced birefringence interferometer instead of the typically used Michelson interferometer set-up. The presented measurement set-up only requires a collimated light source, a medium transparent at the to be analyzed wavelenghts with a high photo-elastic constant placed between crossed polarizers, and an area scan camera or a line scan sensor, and has no need for any moving parts. Although the achieved resolution ∆v=1265cm -1 is low the measurements prove that the system in principle works. Finally, improvements regarding the achievable resolution are discussed.