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US 5,583,695 AGranted
Apparatus including directidal selective screening means for displaying an image of an object
AssigneeCentral Research Laboratories Limited
InventorChristoph Dobrusskin
Life of this patent
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Abstract
An apparatus for displaying an image of an object comprises a beam splitter and retroreflectors between the object and the beam splitter on opposite sides of the object. Louvre films adjacent the beam splitter having oppositely directed slats allow observers on opposite sides of the apparatus to view the image but not the object.
Claims5
An apparatus for displaying an image of an object, comprising:
- a beam splitter for receiving light from an object situated on one side thereof and reflecting at least part of that light in first and second directions, and
- retroreflector means for receiving the light reflected in said first and second directions and reflecting at least part of that light back to the beam-splitter to be transmitted thereby and form an image of the object on the other side of the beam splitter,
- characterized by screening means positioned in a path of light from the retroreflector means to the image, said screening means having first and second portions which transmit light reflected in one of the first and second directions, respectively, and which screen light reflected in the other of the first and second directions and light directly from the object.
Dependencies are inferred from the claim text.