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Six-Meter Focal Length Ebert-Type Infrared Spectrograph Part I Details of the Spectrograph

K. Narahari Rao, Harald H. Nielsen

Abstract

A description is presented of a recently constructed Ebert-type vacuum infrared spectrograph. The grating employed is a 73.25 grooves per mm 25.4 × 12.7 cm ruled echelle blazed for an angle of 63°26′. The entire instrument operates in a vacuum. Facilities have been provided to use the spectrograph with tritium-substituted compounds, such as NT3, TF, CT4, etc.

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Key concepts: Spectrograph, Optics, Grating, Infrared, Physics, Metre, Materials science, Spectral line