Gas separation: apparatus – Electric field separation apparatus – Electrode cleaner – apparatus part flusher – discharger – or...
Patent
1974-09-24
1976-06-01
Powell, William A.
Gas separation: apparatus
Electric field separation apparatus
Electrode cleaner, apparatus part flusher, discharger, or...
350131, 352 43, 352 86, 352 58, 354114, 354294, 355 22, G03C 900
Patent
active
039605639
ABSTRACT:
Methods and apparatus for aiding a photographer in determining, coordinating and adjusting numerous variables which bear on the quality of a stereoscopic picture employing a lenticular screen. The variables may include, depending upon the photographic method employed and the scene to be photographed, the desired size of the stereoscopic picture, the resolving power and lenticule width of the lenticular screen, the number and size of two-dimensional picture negatives which are taken and included in the stereoscopic picture, the distance between adjacent camera vantage points from which the negatives are taken, the camera focal length, the distance from the camera to the nearest element or object of the photographed scene, the distance from the camera to the farthest element or object of the scene, and the distance from the camera to an element or object -- the "key subject matter" -- in the scene which is to lie in the plane of the stereoscopic picture.
According to the invention, the valve of parallax between the images of elements of the photographed scene is determined and controlled so that these images will be clear and sharply focused in the stereoscopic picture. This is accomplished by a method of taking pictures and a method of taking and composing pictures which cause the parallax value to fall within a prescribed range.
In one apparatus embodiment of the invention a camera support is provided which permits a single camera to take successive two-dimensional pictures of the same scene from different points. In another apparatus embodiment of the invention a camera is provided to take a plurality of pictures, either simultaneously or successively, through separate lenses.
REFERENCES:
patent: 765980 (1904-07-01), Mercier
patent: 2860562 (1958-11-01), Swift
patent: 3380360 (1968-04-01), Stockbridge et al.
patent: 3482913 (1969-12-01), Glenn
patent: 3508920 (1970-04-01), Glenn
Kwok Wah Lo Allen
Nims Jerry Curtis
Dimensional Development Corporation
Gallagher J. J.
Powell William A.
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