Optics: motion pictures – Stereoscopic cameras and/or projectors
Patent
1981-05-07
1983-12-06
Hayes, Monroe H.
Optics: motion pictures
Stereoscopic cameras and/or projectors
352 60, 352 62, G03B 3500
Patent
active
044189931
ABSTRACT:
Paired movie cameras, each having synchronized movements and in phase shutters, are provided with focus and zoom optics of identical, but conventional and commercial manufacture. The paired lenses are first rotated relative to one another to obtain a coincidence between the centration vector for each lens for either zoom or focus. Once the centration vectors are aligned identically on a polar basis, mounting to the camera with provision for synchronous zoom between the respective cameras thereafter occurs. Typically, and before each stereo shooting, the zoom optics are set to a maximum magnification and registered to the appropriate distance with the lens finders and reticules. Upon change of the focus and/or zoom setting, a variable prism affixed to one camera is moved relative to the remaining camera to maintain identical centration between the respective lens cameras. This movement can be cam controlled or, microprocessor controlled using stepping motors or servo systems and can also occur either in relative pitch and yaw; or in relative camera lens translation. At a minimum, centration must be corrected so that resultant screen parallaxes for an observer will be maintained to within Panum's Fusion limit (about 1/10 of a degree in vertical plane and 2/10 of a degree horizontal plane). A stereoscopic system which accommodates zoom lenses is disclosed.
REFERENCES:
patent: 2583030 (1952-01-01), Waller et al.
patent: 2630737 (1953-03-01), Ramsdell
patent: 2737082 (1956-03-01), Dowling
patent: 2753774 (1956-07-01), Norling
patent: 2838975 (1958-06-01), Laube et al.
patent: 2868065 (1959-01-01), Tondreau
patent: 3019698 (1962-02-01), Sheldon
Hayes Monroe H.
StereoGraphics Corp.
Wigert, Jr. J. William
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