Abstract

A double-beam infrared spectrophotometer is described. The features include use of one solid angle of radiation for both beams (alternating at 5.5 cps); interchangeable sodium chloride and potassium bromide prisms and 3600 and 7500 lines per inch gratings; and optional modes of automatic recording, either percent transmission on strip chart or expanded recording of energy differences. Significant is the use of two rotating segmented mirrors with the source being imaged in the plane of the first mirror, then in the plane of the second, and, finally, upon the entrance slit of the spectrometer. Steadiness of the source image upon the slit is, therefore, independent of adjustment and quality of the rotating mirrors.

© 1951 Optical Society of America

Performance of a Double-Beam Recording Infra-Red Spectrophotometer

John U. White and Max D. Liston
J. Opt. Soc. Am. 40(2) 93-101 (1950)

A Ratio Recording Double-Beam Ultraviolet Spectrophotometer

William H. King
J. Opt. Soc. Am. 43(10) 866-869 (1953)

A Ratio-Recording Double-Beam Infra-Red Spectrophotometer with Automatic Slit-Control*†

D. F. Hornig, G. E. Hyde, and W. A. Adcock
J. Opt. Soc. Am. 40(8) 497-503 (1950)

Designs of Photometer Units for Infrared Spectrographs

R. A. Oetjen and L. C. Roess
J. Opt. Soc. Am. 41(3) 203-208 (1951)

Construction of a Double Beam Recording Infra-Red Spectrophotometer

John U. White and Max D. Liston
J. Opt. Soc. Am. 40(1) 29-35 (1950)