Abstract

The extension of observation of atomic line emission spectra into the extraphotographic infrared region by high-resolution methods has been accomplished by procedures now well established but which have not found widespread application. Owing to the nonintegrating character of radiometric detecting devices, the observations are always energy-limited. This handicap may be overcome by a threefold approach: utilization of a fast optical system; optimizing the detecting and amplifying system; and developing sources of maximum energy output consistent with the character of the spectrum to be studied. Successful systems for use with a high-resolution grating spectrometer are described. Examples are given of the extension of the observation of several spectra to a fairly easily attainable limit of 4 μ by use of lead sulfide detectors designed for liquid nitrogen cooling.

© 1963 Optical Society of America

Interferometric Measurement of Wavelengths of Infrared Atomic Emission Lines in the Extraphotographic Region

Curtis J. Humphreys
Appl. Opt. 2(11) 1155-1163 (1963)

Progress of Radiometric Observation of Infrared Atomic Emission Spectra

Curtis J. Humphreys
J. Opt. Soc. Am. 50(12) 1171-1175 (1960)

Review of Reviews of Atomic Spectroscopy

William F. Meggers
Appl. Opt. 2(7) 657-663 (1963)

The Atomic Spectra of the Rare Earths: Their Presence in the Sun

Charlotte E. Moore
Appl. Opt. 2(7) 665-674 (1963)

Use of Electrodeless Discharge Lamps in the Analysis of Atomic Spectra

Earl F. Worden, Ralph G. Gutmacher, and John G. Conway
Appl. Opt. 2(7) 707-713 (1963)