Abstract

A 3-m vacuum grating IR spectrometer with digital recording is described. Resolution better than 0.025 cm⁻¹ at 3000 cm⁻¹ is demonstrated, and details are given of a fast deconvolution procedure by which the resolution is enhanced to near 0.010 cm⁻¹. The grating drive incorporates a Merton nut, which facilitates the measurement of highly precise wave numbers. Lines in the 12⁰1 band of N₂O near 4630 cm⁻¹ have been measured and agree within an average of ±0.0004 cm⁻¹ with interferometric values.

© 1980 Optical Society of America

Vacuum Grating Spectrometer for the Mid and Far Infrared

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