Abstract

The problems arising in the use of the lead sulfide cell for direct recording of spectra have been investigated using a spectrograph designed especially for this work. The inhomogeneity of the surface of these cells, as compared with photo-multipliers, makes for important differences in their use. Using a sharply tuned amplifier, the sensitivity of the cells at room temperature is adequate to permit a resolving power of the order of 40,000 at 1.4μ. Wave-lengths may be determined to about 0.1A, using overlapping orders.

© 1949 Optical Society of America

Solar Spectroscopy with a Cashman Cell

Robert R. McMath and Orren C. Mohler
J. Opt. Soc. Am. 39(11) 903-906 (1949)

The Spectra of Argon, Krypton, and Xenon between 1.2 and 2.2 Microns*

W. R. Sittner and E. R. Peck
J. Opt. Soc. Am. 39(6) 474-477 (1949)

The Production of Diffraction Gratings: II. The Design of Echelle Gratings and Spectrographs1

George R. Harrison
J. Opt. Soc. Am. 39(7) 522-528 (1949)

Recording Interferometer for Precision Wave-Length Determinations*

W. R. Sittner and E. R. Peck
J. Opt. Soc. Am. 39(7) 544-546 (1949)

The Luminescence of Zinc Sulfide Activated by Lead

N. W. Smit and F. A. Kröger
J. Opt. Soc. Am. 39(8) 661-663 (1949)