Interlaboratory Study (ILS) for the Determination of the Angular Displacement of Multiple Images in Transparent Parts

An Interlaboratory Study (ILS) was undertaken in order to determine the precision of the test method for measuring the angular displacement of multiple images by transparent parts. Multiple imaging is defined as the angular separation of secondary images from their respective primary images as viewed from the design eye position of an aircraft transparency. Newer aircraft now utilize thick, curved, highly angled transparencies resulting in multiple imaging being more frequently cited as an optical problem by pilots. Secondary images vary in intensity and displacement across the transparency thus giving the observer deceptive cues of attitude, velocity and approach angle. Test method F 1165-88 standardizes the measurement technique. This IS determined the precision of this method.Air Force Research Lab Wright-Patterson AFB OH Human Effectiveness Directorate is the author of 'Interlaboratory Study (ILS) for the Determination of the Angular Displacement of Multiple Images in Transparent Parts', published 1998 under ISBN 9781423561545 and ISBN 1423561546.