A Calibration Technique For Photometers

I. B.C. Matheson; J. Lee; E. F. Zalewski

doi:10.1117/12.943325

27 September 1984 A Calibration Technique For Photometers

I. B.C. Matheson, J. Lee, E. F. Zalewski

Proceedings Volume 0489, Ocean Optics VII; (1984) https://doi.org/10.1117/12.943325
Event: Ocean Optics VII, 1984, Monterey, United States

Abstract

The oxidation of luminol, 3-aminophthalhydrazide, gives rise to light emission in the blue part of the spectrum [1]. The quantum yield of this reaction, i.e. the number of photons emitted per luminol molecule reacted was measured some time ago and the reaction proposed as a chemical light standard [2]. The absolute quantum yield of the reaction has been measured then and since using calibrated photomultipliers and small solid angle geometry [3,4], an integrating sphere arrangement with quantum counter and photo-multiplier [5], and a 4i solid angle arrangement where the sample was surrounded by the chemical actinometer ferrioxalate [6]. The present work concerns a remeasurement of the quantum yield using a silicon, Si, photodiode detector and a geometry for which the light collection efficiency is known absolutely. The luminol reaction has been used in turn to calibrate a portable photometer of similar geometry which in conjunction with a transferable light emitting fluid may be used in the field to calibrate underwater photometers.

Citation Download Citation

I. B.C. Matheson, J. Lee, and E. F. Zalewski "A Calibration Technique For Photometers", Proc. SPIE 0489, Ocean Optics VII, (27 September 1984); https://doi.org/10.1117/12.943325

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