Hologram display
AssigneeDenso Corporation
InventorsHidekazu Hattori, Kenichiro Takada, Tooru Matsumoto
Life of this patent
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Abstract
A hologram display has a projector (2), a hologram screen (9), and a filter set (25) that is arranged between the projector and the hologram screen to absorb light with a peak diffraction efficiency in a specific wavelength area. The hologram display faithfully reproduces original colors and improves productivity. Also provided is a hologram screen having a hologram element (11) for diffracting and scattering a projected beam (21) from a projector (2), and a light scattering element (12) whose scattering angle is at least five degrees. The hologram screen correctly reproduces original colors.
Claims15
A hologram screen comprising:
- a hologram element comprising a pattern produced by an object beam which has passed through a diffuser prior to impinging on the hologram element for diffracting and diffusing a projected beam from a projector;
- and
- a light scattering element having a scattering angle of five degrees or larger, said light scattering element arranged with respect to said hologram element so as to scatter light one of before and after passing through said hologram element.
A hologram display comprising:
- a projector;
- a hologram screen comprising a hologram element comprising a pattern produced by an object beam which has passed through a diffuser prior to impinging on the hologram element for diffracting and diffusing a projected beam from the projector;
- and
- a light scattering element having a scattering angle of five degrees or larger, said light scattering element arranged with respect to said hologram element so as to scatter light one of before and after passing through said hologram element.
Dependencies are inferred from the claim text.