Abstract

The method to determine the relative stray radiant energy (SRE) in UV spectrometry, which was described by Mielenz <i>et al.,</i> may be adapted to apply to optical-null spectrophotometers for all possible reference cell to-sample-cell thickness ratios less than unity [i.e., β (=<i>b</i>_<i>r</i>/b_<i>s</i>) < 1] and to include situations where the "cutoff" solution is not transparent to SRE. If the same cutoff solution is placed in both cells but the sample cell is β-times as thick as the reference cell, then the transmittance ratio (τ'_λ) of the sample solution relative to the reference solution in the presence of a SRE level <i>x</i> is given by: τ'_λ = τ_λ + <i>tx</i>)/τ_λ^β + t^βτ'_λ<i>x</i>) (1) where τ_λ is the true instantaneous transmittance of the sample-beam solution to monochromatic light of wavelength λ, and <i>t</i> is its transmittance to SRE.

Heterochromatic stray light in UV absorption spectrometry: a new test method

K. D. Mielenz, V. R. Weidner, and R. W. Burke
Appl. Opt. 21(18) 3354-3356 (1982)

Two-Stage Radiant-Energy Sink

Joseph F. Hall
J. Opt. Soc. Am. 51(11) 1298-1299 (1961)

Radiant Energy Measurements with Thermopiles

N. C. Beese
J. Opt. Soc. Am. 31(11) 705-708 (1941)

Radiant Energy from Sources in the Far Infrared

Earle K. Plyler, D. J. C. Yates, and H. A. Gebbie
J. Opt. Soc. Am. 52(8) 859-861 (1962)

Discussion of the Theories of Cavity-Type Sources of Radiant Energy

Charles S. Williams
J. Opt. Soc. Am. 51(5) 564-571 (1961)