SCANNED COARSE INTEGRAL HOLOGRAPHIC DISPLAY

Number: 20180046140
Published: 2018-02-15
Filed: 2016-08-10
Assignee: DISNEY ENTERPRISES, INC.
Inventors: SMITHWICK; QUINN Y.; CHU; DAPING; CHEN; JHEN-SI
CPC: G03H1/2294; G03H1/2205; G02B26/106; G02B26/101
Verdict: Medium Hardware
Source: Google Patents · FreePatentsOnline

The keeper's note

Holographic 3D display system.

Abstract

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.

Background

BACKGROUND1. Field of the Description

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

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.

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,

Claims

1. A scanning coarse integral holographic display, comprising: a scanning relay comprising a spatial light modulator displaying elemental holograms of a 3D scene, an array of lenslets, and a scanner assembly operable to direct each of the elemental holograms behind one of the lenslets; and a coarse integral optics assembly positioned between the scanning relay and a viewing space for the holographic display, wherein the coarse integral optics assembly is adapted to combine the elemental holograms into a single hologram viewable in a hologram image plane. 8. A scanning coarse integral holographic display, comprising: a scanning relay comprising a spatial light modulator; a controller operating the spatial light modulator to display sub-holograms of a 3D scene and to concurrently display an array of lenslets with one of the lenslets paired with each of the sub-holograms; and a coarse integral optics assembly comprising a pair of transform lenses positioned between the scanning relay and a viewing space for the holographic display, wherein the scanning relay further includes a scanner assembly operable to direct each of the sub-holograms and a paired one of the holographic lenslets onto a plane between a pair of transform lenses, and wherein the coarse integral optics assembly combines with the pair of the transform lenses the plurality of sub-holograms into a single hologram viewable in a hologram image plane in the viewing space. 15. A holographic display, comprising: a controller; a scanning relay comprising a spatial light modulator and a light source operable by the controller to provide elemental holograms of a 3D scene; and a coarse integral optics assembly positioned between the scanning relay and a viewing space for the holographic display, wherein the coarse integral optics assembly comprises a pair of transform lenses combining the plurality of elemental holograms into a single hologram viewable in a hologram image plane in the viewing space, wherein the scanning relay includes a scanner directing each of the elemental holograms into a focal plane between the transform lenses of the coarse integral optics assembly, and wherein the elemental holograms comprise a set of red, green, and blue holograms for each of the single holograms and wherein the spatial light modulator is illuminated with a light source providing view sequential color synchronized with the display of the red, green, and blue holograms on the spatial light modulator.