A HIGH RESOLUTION SPECTROMETER FOR THE $20\mu$ REGION
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Date
1956
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Ohio State University
Abstract
In an effort to push back the energy barrier to high resolution in the infrared, the Laboratory of Astrophysics and Physical Meteorology of the Johns Hopkins University began construction some years ago on a high flux Ebert spectrometer using a 30^{\prime\prime} Ebert mirror. A discussion of the aberrations of this particular system has been given.1 This spectrometer is now in operation accommodating a grating with a $12 \times 14^{\prime\prime}$ ruled area which is blaced in the 20 micron spectral region+. The spectrometer is driven by a precision screw capable of yielding very accurate wavelength measurements. A resolution of $0.1 cm^{-1}$ has already been obtained throughout the 15 to 24 micron region, and considerably better resolution is to be expected. The principal components of the spectrometer will be discussed, and spectra demonstrating its performance will be shown. This work was supported by Navy contract Nonr 248 (01).
Description
1 Wm. G. Fastie, J. Opt. Soc. Am. 42, 647 (1952).""
Author Institution: Laboratory of Astrophysics and Physical Meteorology, The Johns Hopkins University
Author Institution: Laboratory of Astrophysics and Physical Meteorology, The Johns Hopkins University