Holographic image projection with holographic correction
AssigneeEnvisics Ltd
InventorsJamieson Christmas, Dackson Masiyano
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Abstract
There is provided a method of projection using an optical element having spatially variant optical power. The method comprises combining Fourier domain data representative of a 2D image with Fourier domain data having a first lensing effect to produce first holographic data. Light is spatially modulated with the first holographic data to form a first spatially modulated light beam. The first spatially modulated light beam is redirected using the optical element by illuminating a first region of the optical element with the first spatially modulated beam. The first lensing effect compensates for the optical power of the optical element in the first region.
Claims19
A method of projection comprising:
- providing first holographic data comprising hologram domain data representative of a display image and a first lensing function;
- and
- providing a first spatially modulated light beam to a first viewing location by a method comprising
- spatially modulating light with the first holographic data to form the first spatially modulated light beam;
- and
- redirecting the first spatially modulated light beam using an optical combiner having
- a first region having a first local curvature and
- a second region having a second local curvature, the second local curvature being different from the first local curvature,
- the redirecting being performed by illuminating the first region of the optical combiner with the first spatially modulated beam, the optical combiner redirecting the first spatially modulated light beam to the first viewing location to provide a first image corresponding to the display image at the first viewing location,
- wherein the first lensing function compensates at the first viewing location for the first local curvature of the first region of the optical combiner.
A projector comprising:
- a computer processor configured to combine hologram domain data representative of a display image with hologram domain data having a first lensing function to produce first holographic data;
- at least one spatial light modulator arranged to receive the first holographic data from the computer processer and spatially modulate light with the first holographic data to provide a first spatially modulated light beam;
- an optical combiner comprising
- a first region having a first local curvature and
- a second region having a second local curvature, the second local curvature being different from the first local curvature, the optical combiner being configured to be illuminated by the first spatially modulated light beam in the first region thereof and redirect the first spatially modulated light beam to a first viewing location to provide a first image corresponding to the display image at the first viewing location;
- wherein the first lensing function is configured to compensate at the first viewing location for the first local curvature of the first region of the optical combiner.
Dependencies are inferred from the claim text.