Abstract

A phase-contrast refractometer for measurements in the infrared has been constructed. The optical and mechanical arrangement is discussed and a brief description of the experimental procedure is given. A value for (n−1) of air of 0.00026834 was obtained for the 1.014-μ line of mercury. The standard deviation of the mean is ±0.7%.

© 1958 Optical Society of America

Measurements of the Dispersion of Air from 3651 to 15 300 Angstroms*

D. H. Rank, G. D. Saksena, and T. K. McCubbin
J. Opt. Soc. Am. 48(7) 455-458 (1958)

Double-Beam Infrared Microspectrometer

M. A. Ford, W. C. Price, W. E. Seeds, and G. R. Wilkinson
J. Opt. Soc. Am. 48(4) 249-254 (1958)

Improved Optical Null Infrared Spectrophotometer

L. W. Herscher, H. D. Ruhl, and N. Wright
J. Opt. Soc. Am. 48(1) 36-42 (1958)

Principle of an Interference Refractometer

N. Barakat and H. Nooh
J. Opt. Soc. Am. 48(2) 90-92 (1958)

Near Infrared Solar Radiation Measurements by Balloon to an Altitude of 100 000 Feet*

David M. Gates, David G. Murcray, Clyde C. Shaw, and Robert J. Herbold
J. Opt. Soc. Am. 48(12) 1010-1016 (1958)