HUMAN FACTOR PROBLEMS IN ANTI-SUBMARINE WARFARE. SONAR TARGET CLASSIFICATION USING OPTICAL INTERFEROMETRY: AN EXPLORATORY STUDY.
HUMAN FACTORS RESEARCH INC SANTA BARBARA CALIF
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This report describes a technique for analyzing sonar echoes by means of optical interferometry. An optical filter of appropriate frequency and density is placed over a target echo and rotated through a small angle until a clearly perceptible interference pattern results. Delay-line theory predicts that the interference patterns from submarine and nonsubmarine targets should differ in unique and determinable ways. The present study confirms this prediction and, in addition, develops a technique whereby the critical information can be readily perceived by an observer having little training. Author
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