GB735993A - Improved stereoscopic television apparatus - Google Patents

Abstract

735,993. Stereoscopic television. QUEUNIE, L. C. Oct. 16, 1953 [June 19, 1953], No. 28663/53. Class 40 (3). Left- and right-eye images of a televised scene are projected from spaced lenses 12 and 11 onto a translucent screen 6 through a grating 9 and viewed from the other face of the screen through a similar grating 10 arranged so that the left eye G of an observer sees only the light strips 32 due to the left image and the right eye sees only the strips 31 due to the right image. In one arrangement, Fig. 1 (not shown), the images are reproduced on the screens of separate cathode-ray tubes which project through lenses 11 and 12. The images are derived at the transmitter by two spaced cameras and the transmission of the two image signals to the receiver may be effected either simultaneously on separate carrier waves, Fig. 5 (not shown), or alternately on a single carrier wave, Fig. 7 (not shown). In another arrangement, Figs. 11-13 (not shown), the two images are transmitted to the receiver and produced alternately on a single cathode-ray tube projecting onto the translucent screen through two spaced lenses corresponding to 11 and 12 in Fig. 6. The lenses are rendered operative alternately in synchronism with the image presentation on the cathode-ray tube screen by means of an intermittently rotating shutter. Modifications of the arrangements employing two cathode-ray tubes are described in order to reduce the depth of the receiver cabinet. In a first modification, Figs. 8 and 9 (not shown), the cathode-ray tubes are mounted vertically and project onto the translucent screen over optical paths including a 45 degree vertical mirror. In a second modification, Fig. 10 (not shown), the tubes are mounted parallel to the translucent screens and again project over optical paths including 45 degree inclined mirrors.