Holographic display screen and method for producing the screen
First Claim
1. 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) preparing a transparent carrier plate for passing wide band ambient light through said transparent carrier plate, (b) producing a primary volume hologram by recording a real projection display screen as an object of said primary volume hologram, and using an object beam and a divergent reference beam for said recording, (c) producing a real image of said real projection display screen of said primary volume hologram by illuminating said primary volume hologram with a reproduction beam, (d) producing a secondary volume hologram by recording said real image of said real projection display screen of said primary hologram as an object of said secondary volume hologram, wherein said real image is positioned in the plane of said secondary volume hologram, and (e) optically integrating said secondary volume hologram with said transparent carrier plate to form said holographic display screen as a see through holographic display screen.
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Accused Products
Abstract
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.
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Citations
27 Claims
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1. 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:
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(a) preparing a transparent carrier plate for passing wide band ambient light through said transparent carrier plate, (b) producing a primary volume hologram by recording a real projection display screen as an object of said primary volume hologram, and using an object beam and a divergent reference beam for said recording, (c) producing a real image of said real projection display screen of said primary volume hologram by illuminating said primary volume hologram with a reproduction beam, (d) producing a secondary volume hologram by recording said real image of said real projection display screen of said primary hologram as an object of said secondary volume hologram, wherein said real image is positioned in the plane of said secondary volume hologram, and (e) optically integrating said secondary volume hologram with said transparent carrier plate to form said holographic display screen as a see through holographic display screen. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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- 9. 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.
Specification