Patent
Compact Projection Light Engine For A Diffractive Waveguide Display
Steven John Robbins,Ian Nguyen +1 more
TLDR
In this paper, a waveguide display with a compact projection light engine and a diffractive waveguide is presented, which includes input diffraction gratings with rolled k-vectors.Abstract:
The technology provides a waveguide display having a compact projection light engine and a diffractive waveguide. The diffractive waveguide includes input diffraction gratings with rolled k-vectors. The projection light engine provides collimating light to a projected exit pupil external to the diffractive waveguide. The projection light engine components may include a light (or illuminating) source, microdisplay, lenticular screen, doublet, polarizing beam splitter (PBS), clean-up polarizer, fold mirror, curved reflector and quarter waveplate. A method of manufacturing a diffractive waveguide includes providing input gratings with rolled k-vectors. Rays of light are diffracted by, and passed through, a master hologram to form input diffraction gratings of a copy substrate. A second copy substrate may likewise be formed with a different master hologram. Multiple copy substrates may be assembled to form a multi-layer diffractive waveguide (or multiple diffractive waveguides) having input diffraction gratings with increased diffraction efficiency and angular bandwidth.read more
Citations
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References
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Patent
Transparent waveguide display
Robert D. Brown,Alastair John Grant,Wyatt L. Hendrick,Milan Momcilo Popovich,James H. Stanley,Jonathan David Waldern +5 more
TL;DR: In this article, a first optical substrate comprising at least one waveguide layer configured to propagate light in a first direction, and a second optical substrate consisting of at least two waveguide layers in a second direction.
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Miniature image generator including optics arrangement
TL;DR: In this article, a spatial light modulator has a light reflecting surface cooperating with a light modulating medium switchable between different states so as to act on light in ways which form an overall pattern of reflected, modulated light.
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Polarizing optical system
TL;DR: In this article, the authors provided an optical system, including a light-transmitting substrate having at least two major surfaces parallel to each other and edges, and an optical device for coupling light into the substrate by total internal reflection.
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TL;DR: In this paper, the authors described a projection optical system which optically couples image light from an image source to a near-eye display (NED) of a wearable near eye display device.
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