Color image generation systems and applications

Details Color image generation systems and applications Color image generation systems and applications

1996-10-03

1998-09-01

Ngo, John

Optical waveguides

Temporal optical modulation within an optical waveguide

385 45, 385 14, 385 2, 385 8, 385 9, G02B 610

Patent

active

058022228

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

a) Field of the Invention
The invention relates to color image generation systems for the reproduction of real or virtual two-dimensional or three-dimensional, color or monochrome images and applications of color image generation systems, in particular for television or video applications, and in printing technology.
b) Description of the Related Art
The color image generation systems use the physiological capacity of the human eye, on the one hand, to perceive several colors as a mixed color (additive color mixing) and, on the other hand, to perceive as an image individual points of light presented tightly clustered and in rapid temporal succession. For the purposes of this document, light refers to discrete wavelengths (.lambda.) or wavelength ranges (.DELTA..lambda.) of visible electromagnetic radiation, in particular in the wavelength range from 400 nm to 760 nm. Preferably, the wavelengths or wavelength ranges are selected which correspond to the red, green and blue lights (basic colors). For the purposes of this document, light here also means invisible electromagnetic radiation if it is converted into visible light on a screen by means of a luminophore or by means of a non-linear optical device.
A modern method for mixing color and generating a television or video image has been implemented using light valve technology on the basis of various physical effects (R. Gerhard-Multhaupt and H. Roder: "LichtventilGro.beta.bildprojektion: Eine Ubersicht" (Light valve large image projection: an overview), Fernseh- und Kino-Technik, 45(9) pages 448-452 (1991)).
An image generation system for the creation of color images of any size is revealed in patent application DE 31 52 020 A1 in which the light from three laser diodes is directed into three light guide tubes, the tubes being bundled into an optical fiber tube bundle, and the end of the optical fiber tube bundle being provided with a magnetic cladding. The magnetic cladding can be deflected horizontally and vertically in a variable magnetic field. This is followed by an projection optical system and at least one deflecting mirror, by means of which the light beams are deflected onto a ground glass screen which is either free of luminophores or is coated with luminophores luminescing in the basic colors. This image generation system generates color images using known assemblies which cannot be easily made by means of micro-optics and/or micro-mechanics. There is no spatial combination of light components in the optical fibers. The optical fibers which transmit the individual color components are gathered together in a bundle and the fiber ends are arranged in a tight cluster (see FIG. 26).
In patent application DE 43 24 848 C1, a color image projection system is described which comprises two assemblies. The assembly for light generation and light modulation contains three laser light sources. Using volume-optical amplitude modulators, e.g. Pockels cells, the three light components will be selectively intensity- or amplitude-modulated, and then combined by means of mirrors. This color- and intensity-modulated light will be transmitted into the assembly for column and line deflection for the projection and written into space in synchronism with the modulation.
This patent application also describes that several individual optical fibers can be spatially combined such that they will be continued in a united optical fiber harness. This creates an optical fiber coupler which is capable of effectively transmitting the wide spectrum range of visible light. The optical fibers only serve as light transmission devices providing the connection between the two spatially separated components: light generation and light modulation assembly, and column and line deflection assembly for the projection.


OBJECT AND SUMMARY OF THE INVENTION

The primary object of the invention is to solve the problem of creating comparably small and simply constructed, as well as universally usable, color image generation systems for generating real or virtual i

REFERENCES:
patent: 4871231 (1989-10-01), Garcia, Jr.
patent: 4940303 (1990-07-01), Abeles et al.
patent: 5614961 (1997-03-01), Gibeau et al.

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