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Near-eye sequential light-field projector with correct monocular depth cues

A projector and projection technology, applied in the field of light field projectors, can solve problems such as unsatisfactory parameters, and achieve the effects of low image persistence, continuous depth range, and high image resolution

Active Publication Date: 2019-08-23
CREAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Light field displays and projectors under development are known to be based on special components that do not have satisfactory parameters, or are not feasible in the near future due to technological limitations

Method used

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  • Near-eye sequential light-field projector with correct monocular depth cues
  • Near-eye sequential light-field projector with correct monocular depth cues
  • Near-eye sequential light-field projector with correct monocular depth cues

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0065] Figure 1a is an illustration of the projection of a pinhole aperture light field 16 from a 3D scene with objects 12 and 14 through a virtual pinhole 20 into the eye pupil 10 and onto the retina 24 according to an embodiment. Figure 1b is an illustration of the projection of another pinhole aperture light field 18 from a 3D scene with objects 12 and 14 through another virtual pinhole 22 into the eye pupil 10 and onto the retina 24, and Figure 1c is an illustration of the composition of a wide aperture light field 26 from multiple pinhole aperture light fields.

[0066] Pupil 10 is the pupil of the eye with a typical diameter between 2 and 8 mm. A far object 12 is any object located in the virtual 3D scene at a greater distance than a near object 14 . Near-end (or near-eye) objects 14 are objects located in the virtual 3D scene. The pinhole aperture light field 16 is a radial light field with an almost zero diameter of its aperture stop determined by the size of the ...

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PUM

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Abstract

Light-field projector for projecting a near-eye projected image to the eyes of a user, comprising: a light source (28) comprising a plurality of illumination point-lights (34, 36) configured for sequentially emitting a plurality of incident light fields (38, 40); a spatial light modulator (30) configured for providing a sequence of source images; the spatial light modulator (30) being further configured for modulating each of the incident light-fields (38, 40) in accordance with the source images such as to project sequentially a plurality of pinhole-aperture light-fields (16, 18), each pinhole-aperture light-fields (16, 18) carrying a light-field component from the source image; wherein each sequentially projected pinhole-aperture light-field (16, 18) forms an intersection virtual pinhole(20, 22) through which the component from the source image can be seen, each virtual pinholes (20, 22) having an aperture stop which is determined by the size of the illumination point-light (34, 36)and being spatially shifted in relation with each other, the near-eye projected image being seen through the plurality of virtual pinholes (20, 22).

Description

technical field [0001] The present invention relates to a light field projector for projecting a virtual image to a user's eye, in which monocular depth cues have been optimized. The invention furthermore relates to an augmented reality device comprising said light field projector. Background technique [0002] Conventional three-dimensional (3D) displays and projectors provide the illusion of depth in projected images primarily through binocular cues and, in the case of motion-tracking capable head-mounted displays and near-eye projectors, also motion cues . There is typically another secondary depth cue as well. Stereoscopic 3D displays and projectors deliver to each eye of the viewer an image corresponding to the image of the 3D scene as seen from each eye's different point of view and, if possible, based on the motion of the viewer's head to alter the image to mimic his altered viewpoint in the artificially generated 3D scene. In conventional 3D displays and projecto...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/00G02B27/01
CPCG02B27/0075G02B2027/0127G02B2027/0178G02B27/0172G02B2027/0134
Inventor T.斯路卡
Owner CREAL