Abstract

A prism/grating double monochromator has been made in which the grating monochromator has been ganged with a rocksalt monochromator on a linear frequency basis. Two replica gratings, each used in a single order, cover the range 650 cm⁻¹ to 3650 cm⁻¹. Resolution is such that peaks with a separation of 0.3 cm⁻¹ at 950 cm⁻¹ may be resolved. Gratings and cams and also prisms may be interchanged by operation of press buttons. Similarly the instrument may be converted to a single prism monochromator to extend the frequency range. A constant energy background is provided by magnetically operated slits programed by a tapped potentiometer. The double beam photometer uses a starwheel beam attenuator and is capable of good quantitative accuracy. The whole optical system is evacuable and a pressure of 10⁻³ mm Hg within the vacuum casing is satisfactory for accurate work at grating resolution.

© 1959 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)

Five-Meter Vacuum Spectrometer for the Near Infrared*

D. H. Rank, G. D. Saksena, G. Skorinko, D. P. Eastman, T. A. Wiggins, and T. K. McCubbin
J. Opt. Soc. Am. 49(12) 1217-1222 (1959)

An Infrared Vacuum Grating-Prism Spectrometer

T. K. McCubbin, J. A. Lowenthal, and Howard R. Gordon
Appl. Opt. 4(6) 711-714 (1965)

Design of High-Resolution Monochromator for the Vacuum Ultraviolet. An Application of Off-Plane Eagle Mounting*†

T. Namioka
J. Opt. Soc. Am. 49(10) 961-965 (1959)

Ebert Spectrometer for the Far Infrared

Dean W. Robinson
J. Opt. Soc. Am. 49(10) 966-971 (1959)