1981-11-23
1983-10-04
Griffin, Donald A.
G03B 3508
Patent
active
044075758
ABSTRACT:
A method of forming a stereoscopic pair of images on a length of photographic film is provided in which one image is exposed adjacent one longitudinal side of a length of photographic film over a width of approximately half the available width of the film while the other image is exposed adjacent the other longitudinal side of the film over the remaining available width of the film, the film extending lengthwise in the form of a loop between the places where a particular stereoscopic pair are exposed and the loop being formed by bending the film through 180.degree. between the positions where the individual images of a stereoscopic pair are exposed.
An advantage of this is that during the exposure of the image pair the spacing between the optical systems used to provide the left and right-hand side images can be adjusted to suit the particular scene being photographed.
It may also be desirable for one image to be a full image and the other to be of the same scale but occupy less height or width across the film, the top portion of the image being omitted. Thus, there is usually little stereoscopic information in that portion and the observer can accommodate for this missing portion so that the actual images on the film can be larger.
The invention also extends to a camera and to a viewer for use in this method.
REFERENCES:
patent: 2573543 (1951-10-01), Childs
patent: 2601817 (1952-07-01), Samoggia
patent: 2709401 (1955-05-01), Jaros
patent: 3045572 (1962-07-01), Kinnard
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