Holographic display

Abstract

A method of displaying a Computer Generated Holographic (CGH) image by a display, including setting pixel values of a Spatial Light Modulator (SLM) included in a Head Mounted Display (HMD), producing a interference based holographic image at a first location by projecting coherent light onto the SLM, and re-imaging the holographic image from the first location to form a holographic image in front of an eye of a viewer wearing the HMD. Related apparatus and methods are also described.

Description

RELATED APPLICATIONS[0001]This application claims priority of U.S. Provisional Patent Application No. 62 / 410,494 filed on 20 Oct. 2016, of U.S. Provisional Patent Application No. 62 / 298,070 filed on 22 Feb. 2016 and of U.S. Provisional Patent Application No. 62 / 298,036 filed on 22 Feb. 2016, the contents of which are incorporated herein by reference in their entirety.FIELD AND BACKGROUND OF THE INVENTION[0002]The present invention, in some embodiments thereof, relates to a display for projecting a Computer Generated Hologram (CGH) image to a viewer via an optical element close to the viewer's eye or eyes, such that the CGH image appears to the viewer as beyond the optical element, and more specifically, in some embodiments the optical element may be at least semi-transparent, so that the viewer may see the real world simultaneously with seeing the CGH image.[0003]The present invention, in some embodiments thereof, relates to a Head Mounted Display (HMD), and to methods of using one ...

AI Technical Summary

Benefits of technology

[0073]According to some embodiments of the invention, and further including a transparent liquid crystal display between an apparent location of the holographic virtual image and the eye of the viewer, in which the liquid crystal display is configured to block light from a direction of the apparent location of the holographic virtual image to the eye of the viewer, thereby increasing a contrast between the holographic virtual image and a background of the holographic virtual image.

[0183]According to some embodiments of the invention, the apodization filter provides an average of 50% reduction of intensity of light passing through the apodization filter in an area at a distance of 2 to 500 wavelengths from edges of the apodization filter.

Problems solved by technology

However, binocular disparity is unsuitable for displaying images at close range to a viewer, such as less than 2 meters, where variations in focal planes / depth resolution are easily recognized by the viewer and will result in poor usability and difficulties in interaction with multiple focal planes of a projected image.

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