Importance

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Abstract

A system and a method of a three-dimensional color image display utilizing laser induced fluorescence (LIF) of nano-particles and molecules in a transparent medium are disclosed. In one preferred embodiment, a three-dimensional display volume contains three types (for red, green and blue color) of LIF nano-particles and/or molecules dispersed in a random, uniform fashion in a transparent, fluid like medium. In another preferred embodiment, a color image display system consists of at least two light sources each equipped with two-dimensional scanning hardware and a LIF display volume, a protective coating and at least two light sensors. The protective wavelength filtering coating blocks intense excitation light sources from harming image viewers while passing the LIF display light. The light sensors provide calibration and timing reference signals to maintain stable performance. A host of preferred fluorescence materials are also disclosed. These materials fall into three categories: inorganic nano-meter sized phosphors; semiconductor based nano particles; fluorescent polymers, dye molecules and organometallic molecules. Additionally, a preferred fast laser scanning system is disclosed. The preferred scanning system consists of dual-axes acousto-optic light deflector, signal processing and control circuits equipped with a close-loop image feedback to maintain position accuracy and pointing stability of the laser beam.

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First Claim