| Title |
A Development of an Instrument for Measuring Glare Sensation in the Visual Field |
| Authors |
Sung-Ryul Park ; Jeong-Tai Kim ; Won-Woo Kim |
| Keywords |
Glare Tester ; Glare ; Luminance ; Background Luminance |
| Abstract |
Discomfort Glare from the artificial light sources is an important issue in assessment of lighting Quality for healthy buildings. Glare, as a factor of the characteristics of brightness, which has been defined as the sensation produced by contrast and luminance within an entire field view, unfavorably influences the occupants who performs visual tasks. It may cause annoyance and discomfort by interruption of visibility. In the whole visual field, glare can be determined by effects of the position, the luminance and the size of the light source and brightness of the surroundings. ‘Therefore, experimental equipment is required to maintain a constant visual lighting environment. Recent studies have been developed and used the instrument for glare sensation evaluation but the instruments showed some difficulties to verify the correlation of glare indicators. The instrument have been developed with reference to former studies. It is called the Glare Tester. This is consist of 2[m]-diameter vertical dome screen painted with white flat paint, and light sources installed inside the screen. These light sources can provide various range of brightness at any inner surface of the screen. 2 Clare Light sources can provide the value of luminance within the range of 0~150,000[cd/㎡] Moreover, 12 light sources are used for background luminance and it can perform the value of luminance within the range of 0~350[cd/㎡] Several experiments have been conducted using this Glare Tester to evaluate the range of the visibility, the values of BCD and the glare sensation in lower and upper visual field. |