Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Optical Properties of Lithium Fluoride in the Infrared

Not Accessible

Your library or personal account may give you access

Abstract

Reflectivity measurements were performed on lithium fluoride single crystals at 135°K, 210°K, 300°K, and 355°K at wavelengths from 2 μ to 60 μ. A Perkin-Elmer 112 prism monochromator was used between 2 μ and 30 μ and was modified to a grating monochromator for use between 30 μ and 60 μ. The reflection band near the reststrahl peak shows pronounced secondary structure. A Kramers-Kronig dispersion relation was applied to the Fresnel reflection formula, and the secondary structure was exhibited in the optical constants. The analysis was performed on an IBM-704 computer, and the phase of the reflectivity was determined at some 400 points in the 2 μ to 60 μ range. For each of these points, the real and imaginary dielectric constants, the index of refraction, the extinction coefficient, and the absorption constant were determined. In addition to the main peak of the imaginary dielectric constant at 312.5 cm−1, two secondary peaks appear on the short wavelength side of the maximum. One is at 485 cm−1 and becomes sharper at higher temperature; the other is at 650 cm−1 and is relatively insensitive to temperature over the range measured. An interpretation based on the coupling of the fundamental longitudinal mode to the radiation field is discussed. The damping constants of the main peak were evaluated and were found to vary linearly with temperature over the range measured.

© 1960 Optical Society of America

Full Article  |  PDF Article
More Like This
Reflectivity of Li6F and Li7F†

Milton Gottlieb
J. Opt. Soc. Am. 50(4) 350-351 (1960)

Infrared Transmission of Clouds

David M. Gates and Clyde C. Shaw
J. Opt. Soc. Am. 50(9) 876-882 (1960)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (12)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (3)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (16)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved