Helmet mounted display system
First Claim
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1. A wide field of view reflective composite holographic imaging element possessing optical power, comprising:
- a) a curved optically transparent substrate having an outer reflection side curved to impart a desired optical power and having an inner side;
b) a first holographic optical element reflective at a first wavelength, said first holographic element comprising a planar holographic mirror when said holographic optical element is formed into a planar configuration, said first holographic optical element being adhered at a first surface to said outer reflection surface and deformed to conform to said curved outer reflection side to have said desired optical power, said first holographic optical element having an outer surface opposite said first surface; and
c) a second holographic optical element reflective at a second wavelength, said second wavelength being different from said first wavelength, said second holographic element comprising a planar holographic mirror when said second holographic optical element is formed into a planar configuration, said second holographic optical element being adhered to said outer surface of said first holographic optical element and deformed to conform to said curved outer surface to have said desired optical power, whereby the focal point and orientation of said deformed first and second holographic optical elements can focus images which are in registration with one another.
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Abstract
A holographic display system is disclosed. Utilization of holographic elements provides good transmissivity with respect to both outside stimulus and the superimposed display information. Full color display is enabled by a composite spherical lens and the efficient optical coupling of the display information and the pupil allows the weight of the helmet with the display system to be kept to a minimum.
209 Citations
12 Claims
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1. A wide field of view reflective composite holographic imaging element possessing optical power, comprising:
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a) a curved optically transparent substrate having an outer reflection side curved to impart a desired optical power and having an inner side; b) a first holographic optical element reflective at a first wavelength, said first holographic element comprising a planar holographic mirror when said holographic optical element is formed into a planar configuration, said first holographic optical element being adhered at a first surface to said outer reflection surface and deformed to conform to said curved outer reflection side to have said desired optical power, said first holographic optical element having an outer surface opposite said first surface; and c) a second holographic optical element reflective at a second wavelength, said second wavelength being different from said first wavelength, said second holographic element comprising a planar holographic mirror when said second holographic optical element is formed into a planar configuration, said second holographic optical element being adhered to said outer surface of said first holographic optical element and deformed to conform to said curved outer surface to have said desired optical power, whereby the focal point and orientation of said deformed first and second holographic optical elements can focus images which are in registration with one another. - View Dependent Claims (2, 3, 4, 5)
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6. A helmet mounted, wide field of view, holographic display system comprising:
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a) a right trichromatic light source; b) a right target pupil to receive light from said right trichromatic light source; c) a right optical coupling between said right trichromatic light source and said right target pupil comprising; (i) a right planar beamsplitter positioned in front of said right target pupil and arranged at an oblique angle to a perpendicular to said right target pupil, light passing through said right beamsplitter passing downwardly and to the left away from said right target pupil and the remaining light being reflected thereby; (ii) a right mirror, optically coupling said right trichromatic light source with said right beamsplitter; and (iii) a right spherical holographic reflector receiving said remaining light and reflecting and focussing said remaining light back through said right planar beamsplitter to said right target pupil; d) a left trichromatic light source; e) a left target pupil to receive light from said left trichromatic light source; f) a left optical coupling between said left trichromatic light source and said left target pupil comprising; (i) a left planar beamsplitter positioned in front of said left target pupil and arranged at an oblique angle to a perpendicular to said left target pupil, light passing through said left beamsplitter passing downwardly and to the right away from said left target pupil and the remaining light being reflected thereby; (ii) a left mirror, optically coupling said left trichromatic light source with said left beamsplitter; and (iii) a left spherical holographic reflector receiving said remaining light and reflecting and focussing said remaining light back through said left planar beamsplitter to said left target pupil; g) a right framework supporting said right trichromatic light source and said right optical coupling; h) a left framework supporting said left trichromatic light source and said left optical coupling; and i) a helmet; said right framework support mounted on said helmet; and
said left framework support mounted on said helmet, said left spherical holographic reflector and said right spherical holographic reflector each comprising an optically transparent substrate of a desired optical power, three monochromatic holographic mirror elements adhered to said substrate and taking the power of said substrate, each of said three monochromatic holographic mirror elements corresponding to a different one of the three wavelengths of the trichromatic light from the trichromatic light sources, and an optically transparent protective cover enclosing said three monochromatic holographic mirror elements between said substrate of desired optical power and said protective cover. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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Specification