OPTICAL WAVEGUIDING STRUCTURE COMPRISING A PHOTONIC CRYSTAL NANOSTRUCTURE

An integrated optical beam steering system is configured in three stages to provide beam steering for image light from an imager (e.g., laser, light emitting diode, or other light source) to downstream elements in a display system such as an exit pupil expander (EPE) in a mixed-reality computing dev...

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Bibliographische Detailangaben
Hauptverfasser:	ZANG, Kai, DAVIS, Wyatt Owen, MILLER, Joshua Owen, EFTEKHAR, Mohammadamin
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BLASTING DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY FREQUENCY-CHANGING FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF HEATING LIGHTING MECHANICAL ENGINEERING MULTIPLEX COMMUNICATION NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS SELECTING STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF WEAPONS
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Beschreibung
Zusammenfassung:	An integrated optical beam steering system is configured in three stages to provide beam steering for image light from an imager (e.g., laser, light emitting diode, or other light source) to downstream elements in a display system such as an exit pupil expander (EPE) in a mixed-reality computing device. The first stage includes a multi-level cascaded array of optical switches that are configurable to spatially route image light over a first dimension of a two-dimensional (2D) field of view (FOV) of the display system. The second waveguiding stage transfers the image light along preformed waveguides to a collimator in the third stage which is configured to collimate the image light along the first dimension of the FOV (e.g., horizontal). The waveguiding and collimating stages may be implemented using lightweight photonic crystal nanostructures.