Abstract

A vacuum echelle spectrometer for the near and medium infrared is described together with its prism-order selecting and detector optical systems. The high-dispersion part of the optical system uses a 10.5 cm × 20.2 cm 30-line/mm echelle in a 2.5-m Littrow optical system having 7.5-cm long slits. The limit of resolution at 15 μ using a thermocouple detector is 0.08 cm⁻¹, at 2.5 μ using a cooled PbS cell 0.03 cm⁻¹ can be resolved. Wavelengths can be measured with an accuracy of several thousandths of a wavenumber.

© 1965 Optical Society of America

Recording Vacuum Infrared Prism-Grating Spectrometer*

K. P. Yates and R. F. Buhl
J. Opt. Soc. Am. 45(3) 192-201 (1955)

A High-Resolution Grating-Prism Spectrometer for the Infrared

T. K. McCubbin, R. P. Grosso, and J. D. Mangus
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Infrared Vacuum Spectrometer with Prism/Grating Double Monochromator

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Far-Infrared Vacuum Grating Spectrometer*

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J. Opt. Soc. Am. 55(10) 1233-1238 (1965)

A Simple Grating Spectrometer for the Infrared

Robert J. Bell and T. E. Gilmer
Appl. Opt. 4(2) 157-160 (1965)