Accession Number : AD0465425


Title :   EXPLORATORY RESEARCH ON SCORING TECHNIQUES BY OBSCURATION.


Descriptive Note : Final rept., Jan 64-Jan 65,


Corporate Author : SPERRY RAND CORP LONG ISLAND CITY NY FORD INSTRUMENT DIV


Personal Author(s) : Bessen, Alan ; Wermund, Arthur


Report Date : May 1965


Pagination or Media Count : 82


Abstract : The technique of scoring by obscuration has been investigated. The technique, which is completely passive and non-cooperative, detects the obscuration of background illumination caused by a passing projectile. Miss distance to the projectile is determined by the binocular ranging principle. A breadboard model of an electrooptical system employing this technique has been designed and fabricated. The model is a twochannel system, each channel containing an iris, a lens, a recticle, a photomultiplier tube, and electronic circuitry. The design is simple and entirely self contained requiring no elaborate support or data processing equipment. Laboratory and field evaluations of the system were successful in demonstrating the feasibility of the techniques. Accuracies of = 5% of miss distance over a range of 50-100 feet were achieved during a number of field tests. Recommendations for extending the field of view of the system are presented. In addition, a duplexing technique for determining relative trajectory and a technique for scoring at altitudes above the atmosphere are described. (Author)


Descriptors :   *MEASURING INSTRUMENTS , MEASUREMENT , PROJECTILE TRAJECTORIES , EXTERIOR BALLISTICS , BINOCULARS , RANGE FINDING , CONFIGURATIONS , FEASIBILITY STUDIES , CALIBRATION , LIGHT TRANSMISSION , ATTENUATION , PHOTOMULTIPLIER TUBES , HIGH PASS FILTERS , VECTOR ANALYSIS , POSITION FINDING


Distribution Statement : APPROVED FOR PUBLIC RELEASE