Abstract

For many purposes the Wien radiation law is a sufficiently close approximation to the Planck equation. When it is not, the subtraction in the denominator of the Planck equation interferes with logarithmic calculation. It has been found possible to construct a table which can be entered with the negative of the exponent of the Wien equation, expressed in terms of common (Briggsian) logarithms: c₂ lge/(λT), to get the logarithmic correction to four significant figures. Moreover, the same table can be used if successive approximations are necessary.

© 1947 Optical Society of America

The Ultimate Sensitivity of Radiation Detectors

R. Clark Jones
J. Opt. Soc. Am. 37(11) 879-890 (1947)

The Sensitivity of the Human Eye to Infra-Red Radiation

Donald R. Griffin, Ruth Hubbard, and George Wald
J. Opt. Soc. Am. 37(7) 546-554 (1947)

High Transmission Windows for Radiation of 3 to 14 Microns Wave-Length

Mark Hyman and Bruce H. Billings
J. Opt. Soc. Am. 37(2) 113-118 (1947)

The Nature of the Light Emitter in Photo-Flash Lamps

Frank G. Brockman
J. Opt. Soc. Am. 37(8) 652-659 (1947)

The Two-Quanta Explanation of the Dependence of the Threshold Values and Visual Acuity on the Visual Angle and the Time of Observation

M. A. Bouman and H. A. van der Velden
J. Opt. Soc. Am. 37(11) 908-919 (1947)