EFFECTS OF BAFFLE IN AN INTEGRATING SPHERE ON THE TOTAL LUMINOUS FLUX MEASUREMENT OF A LINEAR SHAPE LAMP

Kamol Wasapinyokul, Santhad Chuwongin, Soontorn Chanyawadee, Rojana Leecharoen, Ajchara Charoensook

Abstract

The measured total luminous flux of a linear-shape lamp by using an integrating sphere can be deviated from accurate by the presence of a baffle in the sphere. For the lamp with co-axial alignment, the measured flux decreased when the baffle was longer. But with perpendicular alignment, the trend was opposite. When the baffle was further away from the detector, the measured flux decreased. These were due to the interplay of the non-uniform regions the baffle induced in the sphere.

Keywords

integrating sphere, total luminous flux, linear-shape lamp, sphere uniformity, spatial correction factor

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IMEKO-WC-2015-TC2-026.pdf

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IMEKO TC

TC2 - Photonics

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