Abstract

Room-, liquid-nitrogen-, and liquid-helium-temperature mid-infrared reflectance spectra of lithium fluoride have been measured at near-normal incidence with special emphasis placed on obtaining precise and accurate data in the difficult R_minimum region. The reliability of the measured R_min curves has been evaluated by a previously suggested mathematical technique. Far-infrared data available from the literature were utilized to construct the low-frequency reflection wings. The newly obtained reflectance data have been processed by an improved Kramers–Kronig dispersion-analysis technique, leading to optical indices significantly more reliable than those reported to date.

© 1974 Optical Society of America

Improved Kramers–Kronig Dispersion Analysis of Infrared Reflectance Data for Lithium Fluoride*

Che-Kuang Wu and G. Andermann
J. Opt. Soc. Am. 58(4) 519-525 (1968)

Kramers–Kronig Dispersion-Analysis Method for Treating Infrared Transmittance Data*

J. D. Neufeld and G. Andermann
J. Opt. Soc. Am. 62(10) 1156-1162 (1972)

Kramers–Kronig Dispersion Analysis of Infrared Reflectance Bands*

G. Andermann, A. Caron, and David A. Dows
J. Opt. Soc. Am. 55(10) 1210-1216 (1965)

Investigation of the Kramers–Kronig analysis: revised optical constants of AgCl

R. S. Bauer, W. E. Spicer, and J. J. White
J. Opt. Soc. Am. 64(6) 830-833 (1974)

Improved Infrared Optical-Index Values for MgO

G. ANDERMANN and E. DUESLER
J. Opt. Soc. Am. 60(1) 53-56 (1970)