Abstract

Although spectrographers can readily calibrate photographic emulsions for their own particular instrumentation, when reproduced elsewhere, the "exact" conditions often yield dissimilar results. The reason for this is in the quotation marks: it is not possible to reproduce conditions from one laboratory to another. There are uncontrollable variables in every source, in every photographic plate, in every spectrograph. This article proposes the use of a controlled excitation source to minimize one of these variables. In addition, data are given which show the potential usefulness of the source for comparing the spectral response (speed) of spectrographs, and for evaluating emulsions.

Comparison of Sun photometer calibration by use of the Langley technique and the standard lamp

Beat Schmid and Christoph Wehrli
Appl. Opt. 34(21) 4500-4512 (1995)

Evaluation of the applicability of solar and lamp radiometric calibrations of a precision sun photometer operating between 300 and 1025 nm

Beat Schmid, Paul R. Spyak, Stuart F. Biggar, Christoph Wehrli, Jörg Sekler, Thomas Ingold, Christian Mätzler, and Niklaus Kämpfer
Appl. Opt. 37(18) 3923-3941 (1998)

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General method for calibrating Sun photometers

Bruce W. Forgan
Appl. Opt. 33(21) 4841-4850 (1994)