Abstract
Optical properties arc determined for samples of widely used light-absorbing windshields of civil aircraft. A literature survey indicates that (1) the light absorption has little effect on visual performance in daylight, but is hazardous in twilight and at night; (2) coloration may adversely affect signal perception in day and night conditions; (3) absorption of erythemal ultraviolet radiation is necessary, and, for near ultraviolet and infrared radiation, absorption is desirable.