Abstract

In the past few years the near-infrared spectral region has received a great deal of attention, and its value has been well established (<i>1–6</i>). Its use unfortunately, has been somewhat limited by dependence on instruments designed for use only in the region 0.2-3.0 microns, or by rather cumbersome prism interchanges in standard double beam infrared spectrometers. The purpose of this note is to point out that surprisingly good near-infrared spectra are available using a sodium chloride prism in a standard double beam instrument.

Some Optical Properties of Lead-Activated Sodium Chloride Phosphors

James H. Schulman, Robert J. Ginther, and Clifford C. Klick
J. Opt. Soc. Am. 40(12) 854-862 (1950)

Optical Constants of Sodium Chloride and Potassium Chloride in the Far Ultraviolet

D. M. Roessler and W. C. Walker
J. Opt. Soc. Am. 58(2) 279-281 (1968)

Sodium Chloride and Calcium Fluoride Windows for High-Pressure Infrared Spectroscopy*

R. W. Parsons and H. G. Drickamer
J. Opt. Soc. Am. 46(6) 464-464 (1956)

Waterproof Coating of Sodium Chloride Optics for CO₂ Lasers

C. M. Ferrar
Appl. Opt. 8(11) 2356-2356 (1969)

Near Infrared Reflection Spectra of Artificial Cumulus Clouds

W. T. Plummer
Appl. Opt. 8(10) 2079-2081 (1969)