The New Jersey Institute of Technology's
Electronic Theses & Dissertations Project

Title:	Far infrared fourier transform spectroscopy using ring interferometer
Author:	Qiu, Changqing
View Online:	njit-etd1993-136 (x, 52 pages ~ 1.5 MB pdf)
Department:	Department of Physics
Degree:	Master of Science
Program:	Applied Physics
Document Type:	Thesis
Advisory Committee:	Chin, Ken K. (Committee co-chair) Moeller, Karl D. (Committee co-chair) Hensel, John Charles (Committee member)
Date:	1993-10
Keywords:	Infrared spectroscopy Interferometers
Availability:	Unrestricted
Abstract:	A circular mirror interferometer named ring interferometer, which was designed by Dr. K.D. Moller, was built and set up for far-infrared Fourier transform spectroscopy. The ring interferometer has ten circular mirrors with the same area. By applying Fraunhofer diffraction theory, the calculation shows that the ring interferometer will have large diffraction angle range compared with lamellar grating interferometer which has rectangular mirrors with same width. Therefore the ring interferometer will be more efficient than lamellar grating in far-infrared spectroscopy. The experimental results show that this ring interferometer will work as expected. In addition, a "home made" helium cooled detector was used in the experiment. A data acquisition and control system based on the WB-31 white box was also set-up and worked well. The Fourier transform spectroscopy was briefly reviewed in the thesis.