A concentration of an extreme number of visual information on a support was thus reached, without encountering the problem of impossibility of bring into focus at the same time all the plans of a real image in volume, on the only plan of a photographic plate.
The totality from the different points of view on a fixed object in 3 dimensions is henceforth restored simultaneously starting from this only holographic support, which makes it possible to present, as in “virtual reality” but with a true relief without requiring the wearing of special glasses and with several observers at the same time, of long continuations of images in directions ordered in perfect agreement with their displacements parallel or perpendicular to the support.

No inscription on the surface of this document “optics-graph” is visible with the naked eye, but by plating one centimetre square of this support directly against his eye, one can see the object in entirety and in-depth as through an attic window or a piece of mirror, with a completely clear vision whatever the distance of the plans of the image in true relief on which the eye can naturally come to adapt.
This incomparable fusion between optics and the graphy allows definitively on the one hand, an in-depth vision according to the third dimension of an image in true relief, and on the other hand, an evolution connect perfectly continuous relief whatever the speed of the exploratory movement of the observer according to the fourth dimension, time.

A half century before the invention of the laser, Gabriel Lippmann had already imagined “integral” photography. However, this process of photography in relief with in particular thereafter sophisticated lenticular system by the French researcher Maurice Bonnet of the National Scientific Research Center (e.g.: French patent N° 774.145 published on November 30, 1934), only presents an image very partially in relief lack information, around which one can almost see evolving his relief according to the horizontal one and by no means according to the vertical by preventing any approach of the relief, which explains its name limited to “image in 3 dimensions” without taking into account of the concept of time relating to the exploratory movement of the observer.
For this photography in simulated relief, the points of tens of photographs (nIP) taken under various angles only reduced and are juxtaposed on a plane surface by a plane system of small lenses focalisatrices, cylindrical and vertical (L). The restitution is carried out with the same lenticular system, whose lenses direct the luminous rays in opposite direction in quite precise directions, but offer only one horizontal angle of vision (A) of a few degrees because of their geometry. Passed this angle (A) around the optical axes of the lenses, the short evolution of the relief only according to the horizontal one is scrambled completely by causing a visual tiredness, for then reconsidering the same points of view but with a flatness of the relief and a bad quality of the image, because the juxtaposed photographs (nIP) remain visible skew under bad conditions through the lenticular system (L).

The displacement of the observer in the relief of the image to discover the various aspects of the object represented as in the vision of reality, is of this very limited fact. Because without the interferential phenomenon of Holography, it is impossible whatever the resolution of the support, to juxtapose the totality of visual information of the various plans of the volume of an object in 3 dimensions out of only one surface of a photographic poster, of a flat-faced screen of television or computer.

Another more recent confusion as regards stereoscopic image comes from a problem of doublon between these old “images in 3 dimensions” from the stereoscopy, and the synthesized images of data processing, called “images 3D”.
Indeed, when it was heard that special glasses henceforth made it possible “to see the images 3D in relief”, there was really what to lose his Latin of it !
The synthesized images “in 3 Dimensions” thus did not offer they not without these ocular prostheses and as one had announced it to us, a vision according to 3 dimensions of geometrical space, i.e. in relief ?..

A spade should be called a spade (or a mouse a mouse…) to stop the confusion which reigns in the spirits as regards stereoscopic images.
These nonstereoscopic synthesized images of the electronic writing remaining as plane as the screens of the computers, are only “animated drawings” not restoring optically the third dimension of depth of space, or, of the images in prospect with two dimensions and animated by the fourth dimension for time !
These drawings of synthesis without relief (nor natural blur of photography or cinematography caused by impossibility of making on the only plan of the film only one bring into focus of the various plans of the real image in volume of a brought closer object) have simply a better appreciable prospect at the time of its rapid evolution.

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