PINHOLE ARRAY AND DISPLAY DEVICE USING SAME

摘要

Provided is a display device with which an observer can view an image as if the image is floating in a space. The inside surfaces of two elliptical hemispheres that have pinholes formed at vertices and have reflective mirrors on the inside are made to face each other. Light rays incident from one of the pinholes are reflected twice between the elliptical hemispheres that face each other and output from a pinhole on the opposite side at an angle with plane symmetry to the angle of incidence. A pinhole array (optical sheet) is formed by disposing a plurality of the elliptical hemispheres that face each other in a plane. A plurality of light rays that are reflected by or radiated from an object to be displayed, which is disposed on one side of the pinhole array, pass through the plurality of pinholes of the pinhole array and form an image positioned in planar symmetry on the opposite side of the pinhole array. Thus, a floating image corresponding to the object to be displayed is formed in space.