초록 ▼

A passive infra-red ranging system for a photographic camera or the like includes two infra-red responsive sensors spaced apart a predetermined distance from one another on the camera body. Each sensor includes a plurality of vertically aligned segments which receive a portion of the infra-red radia

A passive infra-red ranging system for a photographic camera or the like includes two infra-red responsive sensors spaced apart a predetermined distance from one another on the camera body. Each sensor includes a plurality of vertically aligned segments which receive a portion of the infra-red radiation emitted from the subject(s) of principal interest. In one embodiment, the segments of the two sensors are scanned in a successive serial manner by scanning circuitry with the composite output of each sensor analyzed to identify the maxima(s) associated with the subject(s) of principal interest. Computing circuitry determines the angular relationship between the subject(s) and each sensor to permit calculation of the distance-to-subject range by triangulation. In another embodiment, one of the two sensors is angularly adjusted until the scanning circuitry detects “coincidence”between the image of a given subject on each sensor thereby permitting computation of the distance-to-subject range by triangulation.

대표청구항 ▼

A passive ranging system for photographic apparatus, said system comprising: means for sensing infrared radiation emitted by one or more subjects in a scene to be photographed, said sensing means including first and second sensor members of given length spaced apart a predetermined distance in a giv

A passive ranging system for photographic apparatus, said system comprising: means for sensing infrared radiation emitted by one or more subjects in a scene to be photographed, said sensing means including first and second sensor members of given length spaced apart a predetermined distance in a given direction and means for imaging radiation from a subject on said sensor members; means for comparing the position of the subject image defined by said emitted radiation on each said sensor member as measured along said given direction and, in accordance therewith, determining the separation of said subject images along said given direction and the angular relationship between each sensor member and the subject forming such image; and means for determining the distance to said subject by triangulation employing said separation of said images and said angular relationship.