Optical: systems and elements – Holographic system or element
Patent
1992-12-07
1994-03-08
Lerner, Martin
Optical: systems and elements
Holographic system or element
359 25, 359 32, G03H 122, G03H 130
Patent
active
052932591
ABSTRACT:
A holographic display and method for displaying hologram are disclosed. The method and apparatus provides a compact display arrangement in which the light source for illuminating the display is integral with the display, or in other words, an external light source is not necessary. The hologram utilized in the display is formed as a rainbow hologram, with a converging reference beam utilized in forming the diffraction grating upon the holographic plate. The display includes a pair of spaced transparent glass sheets, with the light source disposed between the glass sheets. The holographic plate formed with the converging reference beam is then mounted upon one of the glass sheets, with the light source illuminating the holographic plate with diverging illumination light. A mirror is associated with each of the transparent glass sheets at a location adjacent to the light source, with the reflective surfaces of the mirrors facing each other. Thus, the light from the light source is reflected by the mirrors and the transparent sheets, and impinges upon the holographic plate to provide the diverging illumination light. The method and apparatus provides a compact integrated holographic display.
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Gilbert John A.
Huang Qiang
Lerner Martin
The University of Alabama in Hunstville
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