FEASIBILITY STUDY OF THE EXPLOSIVE LENS ANTI-FLASH SYSTEM FOR USE IN THE XM 1L2 PERISCOPE

摘要

A study program was conducted determine the feasibility and practicality of putting the Explosive 'ens' or 'EPF system for use in the Model XM 112 thank periscope. The purpose of the device is to protect the eyes of a viewer from the damaging effects of intense radiation coursed by nuclear detentions . The BLF system, which expels an explosive to drive an piquing material into a void rawer the lenses, was inemporated into experimental cant-flush shutters. A special test apparatus called an optical dynamic densitometer was used to measure the time required for the experimental . units to reach various optical densities. As a result of the tests a basic shutter design was selected which utilized a cloud by-pass, detractor-driven system At numbest condition, using colloidal graphite in Areal, closure times be low as 75 microseconds it the desired optical density were obtained. However, the Atmel mixture become a solid below -20 F. The calquing material Silicone 555, was fired at 40cF and successfully closed the aperture in 135 microseconds . It is concluded that the studies demonstrated that the ESF system with Silicone 555 cm be used between 165°F and - 40F to prevent nuclear flashblndness . dress. The limited funds did not permit tests at temperatures lower then 40F.