Effect of headlamp area on discomfort glare
| Autor: | C. J. Simmons, Michael Sivak, Michael J. Flannagan |
|---|---|
| Rok vydání: | 1990 |
| Předmět: |
genetic structures
business.industry Subjective rating Headlamp 0211 other engineering and technologies Illuminance 02 engineering and technology 01 natural sciences eye diseases Mean difference 010309 optics Optics 021105 building & construction 0103 physical sciences Optometry Medicine sense organs Vision test business Compensatory tracking |
| Zdroj: | Lighting Research & Technology. 22:49-52 |
| ISSN: | 0024-3426 |
| DOI: | 10.1177/096032719002200105 |
| Popis: | This laboratory study evaluated the effect of the size of the glare source (a headlamp) on discomfort glare. The subject performed two simultaneous tasks: continuous compensatory tracking, and evaluation of discomfort from glare stimuli presented periodically in the near visual periphery. The glare stimuli were circles of two sizes (approximately 0.3 and 0.6 degrees in diameter), and produced five illuminance levels (from 0.03 to 3.1 lux) at the observer's eye. Subjects used a nine-point response scale to evaluate discomfort glare. The results indicate that there was a small but statistically significant effect of the size of glare source, with the smaller glare stimuli resulting in more discomfort glare. The mean difference over the range of glare illuminances tested was 0.2 points on the nine-point response scale. (A) |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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