The Relationship between Solid Angle, Eccentric Angle, and Luminance of Glare Source Under the BCD Condition to Understand the Effect of Visual Characteristics on Discomfort Glare

Unified glare rating (UGR), which is a general discomfort-glare index, targets design objects such as artificial lighting. Light-source size, position of gaze, etc. are limited to the specific range assumed in process developing UGR. Because it necessary reflect human visual characteristics universally predict discomfort according science, understand effects on glare. In this study, was conducted systematically investigate field glare, solid angle and eccentric light source borderline between comfort (BCD) luminance were experimentally investigated. The results experiment revealed that effect light-source BCD depends angle. confirm necessity understanding terms size