Refractive optical screen and floating hologram system using same
AssigneeKt Corporation
InventorsJong-Heum Kim, Jang-Won Suh, Tae-Gil Yang, Sang-Hoon Han
Life of this patent
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Abstract
Disclosed are a refractive optical screen and a floating hologram system using the same. The refractive optical screen is a refractive optical screen which refracts incident light beams and adjusts a travelling direction of the light beams, and includes a prism array in which a plurality of prisms refracting one or more light beams toward a viewing direction of a viewer located at the front side of the refractive optical screen is arranged in a line, and one or more virtual images generated by the one or more refracted light beams simultaneously form a floating hologram arranged in the viewing direction.
Claims11
A refractive optical screen which refracts incident light beams and adjusts a travelling direction of the light beams, the refractive optical screen comprising:
- a prism array in which a plurality of prisms for refracting one or more light beams toward a viewing direction of a viewer located at a front side of the refractive optical screen is arranged in a line,
- wherein one or more virtual images formed by the one or more refracted light beams exist in one space to form a floating hologram,
- wherein the prism array includes a plurality of trigonal prisms each having a predetermined apex angle different from the other, and the predetermined apex angle of each trigonal prisms is determined based on an angle between a segment of a line connecting a visual field of the viewer and an apex of each prism and a reference horizontal surface, an upper apex angle of each prism, and a light beam passing ratio between a first facet disposed at an upper portion of each prism and a second facet disposed in a lower end of the prism in order to control all the trigonal prisms to have the same incident angle.
A floating hologram system, comprising:
- a projector 1 which outputs a first image;
- a projector 2 which outputs a second image;
- a reflective screen 1 which is located in a direction diagonal to the projector 1 and reflects the first image;
- a reflective screen 2 which is located in a direction diagonal to the projector 2 and reflects the second image;
- and
- a refractive optical screen which is disposed at a location facing a viewing direction of a viewer, and refracts a plurality of first light beams toward the viewing direction when the plurality of first light beams reflected from the reflective screen 1 is incident, and refracts a plurality of second light beams toward the viewing direction when the plurality of second light beams reflected from the reflective screen 2 is incident, and
- wherein the plurality of refracted first light beams forms a first virtual image in a hologram space, and the plurality of refracted second light beams forms a second virtual image in a hologram space,
- wherein:
- the refractive optical screen includes
- a prism array in which a plurality of prisms including a first facet that is an optical plane refracting the first light beams toward the viewing direction and a second facet that is an optical plane refracting the second light beams incident in a different direction from a direction of the first light beams toward the viewing direction is continuously arranged
- in a vertical direction to the viewing direction in a line, and
- wherein:
- the projector 1 and the reflective screen 2 are located in an upper portion of the hologram space, and the projector 2 and the reflective screen 1 are located in a lower portion of the hologram space, and
- in the hologram space,
- a floating hologram image, in which the second virtual image is a front image, and the first virtual image is a rear image, is output.
Dependencies are inferred from the claim text.