Half tone reproduction of stereoscopic photographs

Abstract

Abstract A PRINTING PLATE FILM FOR PRINTING STEREOSCOPIC PICTURES TO BE VIEWED THROUGH A VERTICAL LENTICULAR SCREEN IS PRODUCED BY TAKING A STEROSCOPIC CAMERA NEGATIVE THROUGH A SMALL APERTURE LENS WITH A SCREEN IN FRONT OF THE FILM. THE SCENE IS SCANNED ACROSS THE INTERPUPILARY ANGLE WITH A MECHANICAL SCANNING CAMERA. A PROJECTION LENTICULAR SCREEN IS PLACED IN FRONT OF THE CAMERA NEGATIVE AND THE LATTER IS PRINTED THROUGH A GRID TYPE HALFTONE SCREEN IN FRONT OF A PRINTING LENTICULAR SCREEN AND THE SENSITIVE PLATE FILM. A MECHANICAL SCANNING PRINTER HAVING A SMALL APERTURE LESS PRODUCES "ISOFLAGS" ON THE PRINTING PLATE FILM. THE HEIGHT OF THE ISOFLAGS AT ANY POINT IS PROPORTIONAL TO THE BRIGHTNESS OF THE CORRESPONDING ORIGINAL IMAGE; AND THE PLATE IS PREPARED FROM THE PLATE FILM FOR PRINTING THE ISOFLAGS BY ANY CONVENTIONAL PRINTING METHOD, SUCH AS LETTER PRESS, GRAVURE, LITHOGRAPHY, ETC. SCREEN TO RE-ESTABLISH THE ORIGINAL SCENE AS A THREE DIMENSIONAL PICTURE. A METHOD IS ALSO DESCRIBED WHEREIN WIDE LENS TAKING AND PROJECTION CAMERAS ARE EMPLOYED.

Inventors

• 👤 Douglas F Winnek

Bibliographic Details