This paper first overviews photometric quantities of lamps - luminous flux, luminous intensity, illuminance, and luminance - and general techniques for measurement of these quantities to characterize lamps. The total luminous flux of lamps (in lumens) is the most important characteristic of lamp products, and is measured most often by using integrating sphere photometers. A brief history of early photometry and use of integrating sphere is given, followed by introduction of integrating sphere theory. The paper then details recent developments and techniques in integrating sphere photometry that improve the uncertainty of luminous flux measurements. The design considerations for integrating spheres, calibration using standard lamps, sources of error, and methods of corrections are discussed.
Science and Technology of Light Sources, International Symposium | 9th||Greifswald
August 12-16, 2001
International Symposium on the Science and Technology of Light Sources