EFFECTS OF INTEGRATING SPHERE CONDITIONS ON THE SPATIAL RESPONSE DISTRIBUTION FUNCTION IN THE TOTAL LUMINOUS FLUX MEASUREMENT

K. Wasapinyokul, R. Leecharoen, S. Chanyawadee, R. Chuenchom, P. Jamparuang, K. Chumpol, C. Charoenkij, A. Krachangmol

Abstract

The spatial response distribution function of an integrating sphere, for the total luminous flux measurement, was experimentally studied under various conditions. The most apparent effect was the change of signal at the sphere wall around the photo-detector, which typically had higher amplitude than that of the rest. The signal amplitude of such area decreased regarding one of the following conditions: decrease in the reflectance of baffle back surface, decrease in baffle diameter, and increase in the distance between baffle and the detector. The size of area with high amplitude was increased when the aperture diameter of the scanning light increased.

Keywords

spatial response distribution function, integrating sphere, total luminous flux

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IMEKO TC

TC2 - Photonics

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