大気中の微粒子による散乱光を考慮した灯火システムのコンピュータグラフィックス (その2)

CG画像を用いた灯火の視認性評価

抄録

Analysis of how lamplight scattering affects the visibility of lights is useful for determining the optimum operation of a light signal system. However, the accurate measurement of particle size distributions and other such requirements have so far prevented the accurate analysis in fog experiments. We performed an experiment involving observation of the light signal system using the computer-generated images that take account of scattered light. The results revealed that
1) for matrix lights, the adverse effect of scattered lamplight on visibility becomes severe as the number of lights increases,
2) for airport lights, scattered lamplight has a worse effect on the visibility of the runway lights than dose that of the approach lights, because the runway lights are located behind the approach lights in the landing route, and
3) the effect of scattered lamplight on visibility varies with the particle size distribution, the optical depth, and the method of measuring transmittance.