Microsoft Technology Licensing, LLC

Other

Ned Nestorovic

David Douglas Bohn

Rod G Fleck

Steve Robbins

Cynthia Sue Bell

Cynthia Bell

Steve J Robbins

Technology is disclosed for optimizing a near-eye display using a waveguide. A first waveband for a first color narrower than the full spectral bandwidth for the first color and a second waveband for a second color adjacent to the first color in the visible spectrum are generated in image light of an image generation unit like a microdisplay. The first waveband and the second waveband are coupled into a same layer of a diffractive waveguide. An input grating of the same layer of the waveguide has a grating wavelength band approximately matching a waveband extensive with the first waveband and the second waveband. A converted green light emitting diode (LED) may be used for obtaining a first waveband centered around 515 nm in some examples. One of more of the wavebands may be obtained using filters, for example filters using dichroic mirrors, quantum dots or a combination of these.

Display efficiency optimization by color filtering

Embodiments are disclosed herein that relate to compact optical systems for incorporation into near-eye display devices. For example, one disclosed embodiment provides a near-eye display system may comprising a light source, a first polarizing beam splitting surface configured to receive light from the light source, a mirror configured to reflect light passed by the first polarizing beam splitting surface, and a quarter wave plate positioned between the first polarizing beam splitting surface and the mirror. The near-eye display system may further include a second polarizing beam splitting surface positioned at an angle relative to the first polarizing beam splitting surface and a microdisplay configured to produce an image via light received from the second polarizing beam splitting surface.

Optical system for near-eye display

Technology is described for 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. The projection optical system and the image source make up a projection light engine. Light from the image source is directed to a birdbath reflective optical element which is immersed in high index glass. The image light is reflected and collimated by the birdbath element and travels outside a housing of the projection light engine forming an external exit pupil, meaning the exit pupil is external to the projection light engine. A waveguide optically couples the image light of the external exit pupil. An example of a waveguide which can be used is a surface relief grating waveguide.

Projection optical system for coupling image light to a near-eye display

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Seattle, WA, United States of America

Ned Nestorovic