GB1232810A - Motion picture camera system - Google Patents

Abstract

1,232,810. CinÚ and television camera systems. N. P. KENWORTHY JNR. and W.R. LATADY. Sept.3, 1968 [Nov.24, 1967], No.41819/68. Heading G2A. In a system for photographing in locations not conveniently accessible with conventional equipment, the location is explored by a mirror 28 at the end of an elongated optical relay tube 26, the light image so reflected along the tube being received at the other end by a motion picture camera and a television camera, both cameras being mounted together so that their joint movement can be controlled according to the image received on a television screen. As shown, the film camera 22 and television camera 24 are both fixed below a mounting plate 34 by brackets 36, 40, the tube 26 also being similarly fixed by a bracket 38. As shown, the inclined mirror 28 is located so as to reflect the image of a model building 212 along the tube 26. Mounted within the tube are an objective lens assembly 120, a field lens 122, a relay lens assembly 124, and a beam-splitting pellicle 130. About 8% of the light falling on the pellicle is reflected into the television camera 24 to be received on a television screen housed in a remotely located console 44. The remainder of the light passes through the pellicle and is reflected from a mirror 139 to the motion picture camera 22. This camera has no lens, the optical system within tube 26 providing the proper image on the film plane. The whole system (i.e. the two cameras and the tube 26) can be given a rotary movement by means of a motor 92, which drives through a gear-box 76 a plate 77 to which the mounting plate 34 is attached by threaded rods 104. This movement is controlled by a lever 202 on the front of the console. The angle of inclination of mirror 28 can be varied by a mechanical linkage 176, 178, 180 actuated by a motor 194, which is also controlled by the same lever 202, this being arranged to move "joystick" fashion. The arrangement of threaded rods 104 enables plate 34, carrying the whole system, to be raised or lowered vertically, by means of a gear train driven by a motor 106, and controlled by a switch 208 on the console, the speed being varied by a further switch 210. The plate 34 is itself mounted on a carriage 60 which can move in a linear direction on a further carriage 56 which can move on rails in a direction perpendicular to the direction of movement of carriage 60. Thus the carriages 58 and 60, which are controlled manually, enable an X-Y co-ordinate movement to be given to the camera system. The relay lens assembly 124 is mounted in a separate tube 126 which can slide axially, for focusing purposes, within the main tube 26. Its movement is controlled by a motor 152, in turn controlled by a lever 172 on the console, and the value is indicated by a needle 166 moving on a scale 167 in front of the television screen. Thus an operator at the console can see, and control, what will be photographed by the camera 22. In the modification of Figs. 11-15 (not shown), the image-splitting means 130, 139 is replaced by an arrangement in which the television camera "sees" the scene through the viewing window of a reflex cinÚ camera.