System for obtaining an indication of a time parameter defining the relative motion of a moving object and a moving target

摘要

1,013,150. Optical systems. DE HAVILLAND AIRCRAFT CO. Ltd. Nov. 26, 1959 [Dec. 1, 1958], No. 38749/58. Heading G2J. [Also in Division H4] A system for determining the parameters defining the relative motion of a moving object, for example a guided missile in relation to a moving target comprises a detector unit sensitive to visible and/or infra-red radiation and means for accurately determining the angular beam width of such radiations receivable by the detector unit. In Fig. 5 the casing 1 of the guided missile is provided with a series of windows 2 to allow radiation from the target to be reflected by a parabolic mirror 3 to a photo-cell 4. Screens 5 and 6 restrict the width of the beam receivable and determine its angle relative to the missile. Filters 8 may be provided in front of the detector 4.