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AssigneeEADS Deutschland GmbH
InventorsThorsteinn Halldorsson, Hannes Lucas, Horst Schmidt-Bischoffshausen
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A transparent holographic display screen for laser projection of at least one or more monochromatic wavelengths, is constructed to selectively diffuse an incident narrow-band laser beam at a predetermined solid angle and simultaneously to pass wide-band ambient light unobstructed through the display screen. The transparent holographic display screen has at least one holographic volume phase grating which is optically coupled to or integrated with a transparent carrier plate. The holographic display screen with its volume grating is produced by illuminating a real screen as an object into a primary hologram and recording a real holographic image of said real screen into a secondary hologram.
A method for producing a transparent holographic display screen for displaying information with a display projection light beam emanating from a display projector, said method comprising the following steps:
A transparent holographic display screen for displaying information with a projection light beam emanating from a display projector, said transparent holographic display screen comprising a transparent carrier plate for passing wide band ambient light through said transparent carrier plate, a secondary volume hologram optically integrated with said transparent carrier plate, said secondary volume hologram comprising a holographic volume phase grating in which a real image of a real display screen is optically stored as an interference pattern, wherein said real image of said real display screen is a reproduction of said real display screen optically stored in a primary volume hologram and generated from said primary volume hologram by a conjugate reference beam, said real image of said real display screen being in the plane of said secondary hologram.
Dependencies are inferred from the claim text.