Evaluation of Discomfort Glare from Windows

Part 1. Glare constant at various positions in the visual field

Abstract

The objective of this research work is to propose a practical method of evaluating discomfort glare from windows. It is an issue in evaluating discomfort glare from windows that the glare source is rather large compared with luminaires. In this report (Part 1), variations in Glare Constant are investigated for the position of the glare source in the visual field. Luminance that caused a standard sense of glare was measured using a self-made glare meter. The result shows that Glare Constant changes with the position of the glare source.