Device for direct cinematographic viewing of stereoscopic images on film with a sound track
AssigneeStaar Development Company S.A.
InventorMarcel Staar
Life of this patent
Estimating the term…
Abstract
Mobile refractive optical members are placed in a device between the film and stereoscopic direct viewing windows. A drive is provided for driving the film strip bearing stereoscopic images and the mobile refractive optical members at a uniformly constant speed and in synchronism across the fields of view of the viewing windows to provide a fixed image in each window despite the motion of the film; the film strip has a sound track which may be reproduced by conventional reproduction equipment since the film strip is driven at a constant speed.
Claims3
A device for cinematographic viewing of images on a strip of film comprising:
- a housing having a viewing window to allow viewing of the images on the film strip through a field of view;
- drive means in the housing adapted to receive and continuously move the film strip to pass the images on the film across the field of view of said viewing window;
- and
- mobile refractive optical means in said housing movable by said drive means between the film strip and the viewing window across the field of view in synchronism with the passage of the film strip images and forming an optical image which is visible through the window as the film strip images enter and move across the field of view and which is fixed despite the continuous motion of the images on the film strip, said mobile refractive optical means movable between the film strip and the viewing window comprising:
- magnifying lenses movable in succession across the field of view, the full passage of each magnifying lens corresponding to the full passage of an image on the film strip past the window,
- a dish-shaped element supporting said lenses at its periphery obliquely to the plane of said dish-shaped element, said lenses and dish-shaped element being formed integrally as an injection-molded plastic part, and
- means for rotatably supporting the dish-shaped element with the plane of the element inclined to a viewing axis intersecting one of said lenses and said window, each lens being movable across the field of view substantially transverse to said viewing axis as the dish-shaped element rotates.
Dependencies are inferred from the claim text.