Optics: motion pictures – Methods – Recording
Patent
1991-06-19
1993-08-17
Hayes, Monroe H.
Optics: motion pictures
Methods
Recording
352 58, 352 59, 352 65, 352 81, G03B 1918
Patent
active
052373533
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present application relates to a process and to an optical system which are integrated and in which three-dimensional still or moving pictures are taken, the films coming from the different cameras are copies onto a single film of modest length, and this latter film is reproduced, furnishing new three-dimensional or moving pictures. The invention encompasses cinematographic systems, still signs, slides and video, including television, principally for domestic use, in shop windows, conference rooms and other similar places for exhibition.
The Applicant is the holder of the Spanish Patent of Invention with Publication No. 2,000,293 (Application Number 8,603,612), of the Spanish Patent of Invention with Publication Number 20,135,269 (Application Number 8,902,155), and of the Spanish Patent Application being processed 8,900,722 filed on Feb. 28, 1989. Likewise, the Applicant has filed the Patent Applications PCT/ES 90/00013 and 90/00014, both being processed, as well as other applications corresponding to the Spanish ones, in various countries and at the European Patent Office.
In these patents and patent applications there are described and claimed various aspects of optical systems for achieving three-dimensional reproductions, based on the angular differentiation of pictures. Specifically, in the Spanish Patent 20,135,269 as well as in the Application PCT 90/00013, there is described an improved screen capable of being used in the optical systems in question, and also a process for manufacturing said improved screen.
BACKGROUND OF THE INVENTION
Systems based on the angular differentiation of pictures require the taking of a large number of pictures from different places and the projecting of the same number of pictures from different locations.
From the literature which deals with the taking of three-dimensional pictures, it is known that the maximum separation between the optical centres of the taking lenses for the reproduction to appear continuous is a function of the distance between the nearest object and the furthest object (depth of field) as well as of the distance between these objects with respect to the picture-taking device.
In order to apply these theoretical results in practice, in many cases of the prior art a separation is achieved between the optical centres of the taking lenses which is less than the breadth of the common, marketed or conventional cameras.
If the picture to be taken were to remain motionless, then it would be possible to do the taking with a conventional camera situated in a different place at each instant. However, if the picture were moving, this system would be inappropriate.
As far as the Applicant knows, there exist on the market very few cameras which can fulfill the conditions required for taking pictures. Those which are known have several lenses of small diameter and a likewise reduced negative format. These cameras are generally designed for their use in photography, and are used for reproducing still pictures in most cases as photographs on paper. A very small number of pictures, usually four, is used, which is entirely insufficient for systems based on the angular differentiation of pictures, and for this reason cannot be used in the present case.
Because of this lack of suitable cameras for taking three-dimensional pictures, it is necessary to take a large number of two-dimensional pictures, each one with a conventional camera; correspondingly, the same large number of projectors or projection lenses would be needed to reproduce the pictures taken three-dimensionally.
In the Ives U.S. Pat. No. 1,833,290, there are described three systems of reproduction by projection which are appropriate for still or moving pictures.
Of these three systems, that of back-projection is suitable only for systems based on the scalar differentiation of pictures, and therefore cannot be considered in the present case.
On the other hand, the other two systems, both of which are front-projection systems, can be employed for the angular differentiation o
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