493,536. Stereoscopic kinematography. PLANTA, G. U. Jan. 4, 1937, No. 238. Void. Convention date, Jan. 13, 1936. [Class 97 (i)] "Left-eye" and " right-eye " views are taken alternately on a film 6 by an optical system comprising objective 1, 2, spaced apart the normal distance of the eyes, reflectors 3, 7 and a combining prism 4, 5 which reflects light from the two objective along the same line A. A shutter 8 having an aperture 11 exposes the film to light from the two objectives alternately. For distant objects, the axes of the objectives 1, 2 are parallel, but the objectives may be so connected together, e.g. by ball-joints, as to be rotatable simultaneously to allow these axes to converge to any object on the line A. The film is projected at normal speed on an ordinary screen, the images thus alternating.

First page clipping of GB493536 (A)