Scanned coarse integral holographic display having holographic lenslets displayed by spatial light modulator

Scanned coarse integral holographic display (Smithwick).

A holographic display system for generating a super hologram with full parallax in different fields of view in the horizontal and vertical directions. The display system includes assemblies or subsystems each adapted to combine holographic displays and coarse integral displays to produce or display a coarse integral hologram. Briefly, the display system described herein teaches techniques for enhancing operations of coarse integral holographic (CIH) displays. The enhanced CIH displays may utilize ganged scanners, may operate scanners to provide boustrophedon scanning, may be configured to add color information such by view sequential color hologram display and scanning, may replace or supplement X-Y scanning abilities with a resonant scanner, and may replace physical lenslet arrays by generating and displaying a holographic lenslet for each elemental hologram used to create the super hologram.

BACKGROUND1. Field of the Description(1) The present invention relates, in general, to autostereoscopic displays and to holography and to holographic displays, and, more particularly, to displays adapted to facilitate scaling and tiling (or otherwise combining) such holographic displays, e.g., scalable and tileable coarse integral holographic displays such as scanned coarse integral holographic displays.2. Relevant Background(2) Holography is a technique that enables three-dimensional (3D) images to be generated, recorded, and later displayed. It typically involves the use of a laser, interference, diffraction, light intensity recording, and suitable illumination of the recording. The image changes as the position and orientation of the viewing system changes in exactly the same way as if the object were still present, thereby making the image appear in 3D. The holographic recording itself is not an image as it is made up of an apparently random structure of varying intensity, density, or profile.(3) As the demand for 3D displays rapidly grows, holographic displays are considered by many within the 3D entertainment industry as the ultimate goal of 3D displays. Such high regard is held for these devices because holographic displays are capable of displaying all the 3D cues of a real scene to a viewer. Unfortunately, to date, designing and fabricating holographic displays have proven difficult due to one or more challenges that have limited display size, field of view, and fram