The Obscuration of Vision through Daytime Telescopes by External Coatings:Field Test Results.

摘要

The effectiveness of external coatings for obscuring vision through daytime telescopes was determined for four coating materials and three levels of area coverage. In a field test, subjects searched through a main gunner's telescopic sight for panel targets emplaced on an outdoor range. Glass slides were placed in front of the objective lens to obscure vision. The slides had been coated with one of the four materials in one of three predetermined random patterns. The test showed that the material ranking in order of decreasing effectiveness is (1) green dye, (2) carbon black, (3) clear silicone base, and (4) aluminum pigment. The green dye was effective at 100 percent and 80 percent coverage, but ineffective at 30 percent. The carbon black was only effective at 100 percent coverage. (Author)