SISTEMA OTTICO PER TELECAMERA

The system has components series-mounted in the direction of the light travel. The face-plate of the camera tube is coated with a light-sensitive layer, and the last compoen component of the objective exhibits a lens power different from zero while acting as the faceplate of the tube. For cameras with a significant angular field of view it is expedient to have the last component in the objective as a concave lens with the curvature facing the object. When the field is limited to 20 deg. in the case of long-focus system, the last component is a positive plano-convex lens with its curvature facing the object. Other types of lenses are selected for different conditions of camera work. The first variant of the objective (2) has input with cemented biconvex lens (5) and biconcave lens (6) followed by similar cemented lenses (7,8). The third component includes cemented biconvex and biconcave lenses (9,10), the last part of the objective formed by the faceplate (3) the optical power of which differs from zero. The faceplate lens is planoconcave and is mounted in the holder (11) secured at the end of the camera housing, while the lens (3) is coated with a light-sensitive layer (12). The adapter (14) connects the housing (13) holding the objective (2) with the housing of the TV tube (4).