Aerospace series - Test methods for transparent materials for aircraft glazing - Part 5: Determination of visible light transmission
航空航天系列 - 用于飞机玻璃的透明材料的测试方法 - 第5部分:可见光透射的测定
This standard specifies the determination of visible light transmission for transparent materials by using a photometer employing a defined light source and a photocell matched to the response of the human eye.
Because the materials under test are basically colourless, certain deviations from ideal conditions, indicated in the test, are allowable.