| Scattered light from transparent materials is an issue impacting many industries, including the aerospace industry. Haze, the ratio of scattered light to the total light transmitted through a transparent material, is often used to specify the quality of a transparency and as a metric to estimate the impact of light scattered from the transparency on visual performance. However, research has shown that haze does not correlate well with visual performance losses. This effort examines the measurement of haze, its limitations, and the behavior of haze when used to measure aerospace transparencies. The effort further compares this standard haze measurement with an angle-resolved technique for measuring scattered light, showing why haze should be a poor predictor of visual performance. This research applies diffractive techniques in an attempt to predict and model the angular behavior of scattered light. Visual performance for viewing targets through a veiling luminance is predicted for a particular set of target conditions. This research then measures visual performance to determine the accuracy of the visual performance model. |
