Abstract

A far ir spectrometer has been built which uses a double pass optical system to increase the spectral dispersion. Because of the energy limitations in this spectral range, this means of increasing the dispersion is an efficient way to improve the resolving power of a grating monochromator. The same optical system is also used to advantage in a lamellar grating interferometer where the increased dispersion improves the performance at higher frequencies. Consideration is also given to instrument errors and signal noise which can affect, and in some cases limit, the present performance of a far ir Fourier interferometer.

© 1969 Optical Society of America

A Double Beam, High Resolution Spectrometer for the Far Infrared

T. M. Hard and R. C. Lord
Appl. Opt. 7(4) 589-598 (1968)

Improved Double Beam, Vacuum Far Infrared Spectrophotometer

Isao Iwahashi, Koichi Matsumoto, Shunji Matsudaira, Shigeo Minami, and Hiroshi Yoshinaga
Appl. Opt. 8(3) 583-588 (1969)

Ray Tracing in Spectrometers with Plane Gratings and Off-Axis Parabolas, Including a New Double Pass System

D. F. Eggers and M. A. Peterson
Appl. Opt. 8(3) 589-592 (1969)

A High-Resolution, Far Infrared Double-Beam Lamellar Grating Interferometer

Richard T. Hall, Dale Vrabec, and Jerome M. Dowling
Appl. Opt. 5(7) 1147-1158 (1966)

High-Resolution Fourier Transform Spectroscopy in the Far-Infrared

P. L. Richards
J. Opt. Soc. Am. 54(12) 1474-1484 (1964)