INVENTED : 1987 


- Procédé et dispositif pour projeter et observer des images differenciees ou stereoscopiques, dessins, photographies, films cinematographiques ou video, INPI-FR, N0 8907241 1989/1993

-  "Processo para projeção de imagens com paralaxe horizontal sobre tela holográfica, INPI-BR, N0 9302553-0, 1993.18.07 


The diffractive screen can be compared to a diffractive lens or to the hologram of a point source. But receives focused white light. Po and P1 are points on a projecting lens, and may coincide. An image in pure red, for example, can be seen by the right eye R.E. while an entirely different image in pure green can be seen by the left eye L.E.. Following this example we can see below how the presence of a point in three dimensional space can be established by having one representative element for each wavelength. One green and one red point can be imaged at a certain horizontal distance on the screen giving a virtual image behind the screen, or can coincide at the same position for giving the image on the screen, or in reversed sequence at a certain distance to converge light in front of the screen. For a continuous spectrum, horizontal parallax is present, as in a Benton hologram but with colors changing horizontally.

Know More!  You can obtain here my articles:
New possibilities in the utilization of holographic screens (1992)
Volume Images Vector Display Based on a Diffractive Screen
Construction of white-light holographic screens
Estereoscopio com tela holografica para ver tomografias Video:
Enlarging Holograms Under White Light, a Way to Save Holographic Material
The use of diffractive screens for electronic imaging
Holo-Television System with a Single Plane
Holoimages on Diffraction Screens (2011)

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