Abstract: The present disclosure relates to augmented reality devices and related methods. In one or more embodiments, an augmented reality device includes a projection system and a waveguide. The projection system includes a projector and a prism. The projector projects an image along the projectors major axis. The prism refracts the image having a first spectrum, a second spectrum, and a third spectrum. The waveguide is disposed at a wrap angle from a plane formed from the major axis of the projector. The waveguide includes an input coupler and an output coupler. The input coupler includes input structures at an input period and an input orientation and the input coupler is configured to receive the spectrums at different corresponding input angles. The output coupler includes output structures at an output period and an output orientation and the output coupler out couples the respective spectrums at an about equal output angle.

Abstract: A waveguide is disclosed. The waveguide includes one or more gratings disposed over a substrate. The gratings include grating structures having a grating pitch. The waveguide includes a waveguide region disposed over the substrate between each grating and an edge of the substrate. The waveguide region includes auxiliary structures with an auxiliary pitch less than the grating pitch.

Abstract: Embodiments of the disclosure provided herein include waveguide combiners. More specifically, embodiments described herein provide for waveguide combiners with a waveguide layer and a coating having a tapered portion disposed thereover. The waveguide includes one or more gratings, the one or more gratings including a plurality of grating structures disposed over a waveguide substrate, wherein the grating structures include a waveguide material, and the plurality of grating structures include exterior grating structures at outer edges of the one or more gratings. A waveguide layer is disposed over the waveguide substrate between the exterior grating structures and an edge of the waveguide substrate, the waveguide layer including the waveguide material, and a coating disposed over the waveguide layer, the coating having a tapered portion that is tapered from at least one of the exterior grating structures to a planar portion of the coating.

Abstract: Certain aspects of the present disclosure include an optical device. The optical device generally includes an in-coupler (IC) configured to receive light from a projector, where the IC includes at least one grating line offset (GLO) associated with one or more phase deviations of the light from the projector. The device also includes a waveguide and an output coupler (OC), where the IC is configured to redirect the light from the projector to the OC through the waveguide.

Abstract: Single-sheet waveguide combiners having increased field-of-view for multiple colors by enabling separate action on different colors without creating spurious paths are provided. A waveguide includes a first region including an in-coupler (IC) grating for a first color; a second region including an IC grating for a second color and a third color; a third region including an out-coupler (OC) grating for the first color and an eye-pupil-expander (EPE) grating for the second color and the third color; a fourth region including an EPE grating for the first color; and a fifth region including an OC grating for the second color and the third color and an EPE grating for the first color, wherein the fifth region at least partially overlaps with the third region.

Abstract: Embodiments described provide for waveguide combiners with phase matching regions. The waveguide includes one or more gratings. The one or more gratings includes grating structures disposed over a waveguide substrate. A phase matching region is disposed over the waveguide substrate between the one or more gratings and a waveguide region. The phase matching region includes a waveguide layer having a thickness varying from a first end to a second end of the waveguide layer, or a plurality of structures having depths therebetween. The one or more of the depths are different from each other, or at least two or more structures of the plurality of structures have a first duty cycle different than a second duty cycle of the plurality of structures.

Abstract: Embodiments of the present disclosure generally relate to augmented reality waveguide combiners. The waveguides includes a waveguide substrate, having a substrate refractive index (RI) nsub, a slab waveguide layer disposed over the waveguide substrate, the slab waveguide layer having a slab RI nswg and a slab depth dswg, the slab depth dswg from a lower surface to an upper surface of the slab waveguide layer, at least one grating defined by a plurality of grating structures, the grating structures are disposed in, on, or over the slab waveguide layer, and a superstrate between and over the grating structures, the superstrate having a superstrate RI nsuperstrate and an interface with the slab waveguide layer. The slab RI nswg is greater than the substrate RI nsub and the slab RI nswg is greater than the superstrate RI nsuperstrate.

Abstract: Embodiments of the present disclosure generally relate to methods for forming a waveguide. Methods may include measuring a waveguide substrate, the waveguide having a substrate thickness distribution; and depositing an index-matched layer onto a surface of the waveguide, the index-matched layer having a first surface disposed on the waveguide substrate and a second surface opposing the first surface, wherein the index-matched layer is disposed only over a portion of the waveguide substrate, and a device slope of a second surface of the index-matched layer is substantially the same as the waveguide slope of the first surface of the waveguide.

Abstract: Embodiments of the present disclosure generally relate to augmented reality waveguide combiners. The waveguides includes a waveguide substrate, having a substrate refractive index (RI) nsub, a slab waveguide layer disposed over the waveguide substrate, the slab waveguide layer having a slab RI nswg and a slab depth dswg, the slab depth dswg from a lower surface to an upper surface of the slab waveguide layer, at least one grating defined by a plurality of grating structures, the grating structures are disposed in, on, or over the slab waveguide layer, and a superstrate between and over the grating structures, the superstrate having a superstrate RI nsuperstrate and an interface with the slab waveguide layer. The slab RI nswg is greater than the substrate RI nsub and the slab RI nswg is greater than the superstrate RI nsuperstrate.

Abstract: Embodiments of the present disclosure generally relate to methods of forming a substrate having a target thickness distribution at one or more eyepiece areas across a substrate. The substrate includes eyepiece areas corresponding to areas where optical device eyepieces are to be formed on the substrate. Each eyepiece area includes a target thickness distribution. A base substrate thickness distribution of a base substrate is measured such that a target thickness change can be determined. The methods described herein are utilized along with the target thickness change to form a substrate with the target thickness distribution.

Abstract: Embodiments of the present disclosure generally relate to augmented reality waveguide combiners. The waveguides includes a waveguide substrate, having a substrate refractive index (RI) nsub, a slab waveguide layer disposed over the waveguide substrate, the slab waveguide layer having a slab RI nswg and a slab depth dswg, the slab depth dswg from a lower surface to an upper surface of the slab waveguide layer, at least one grating defined by a plurality of grating structures, the grating structures are disposed in, on, or over the slab waveguide layer, and a superstrate between and over the grating structures, the superstrate having a superstrate RI nsuperstrate and an interface with the slab waveguide layer. The slab RI nswg is greater than the substrate RI nsub and the slab RI nswg is greater than the superstrate RI nsuperstrate.

Abstract: Embodiments of the present disclosure generally relate to methods of forming a substrate having a target thickness distribution at one or more eyepiece areas across a substrate. The substrate includes eyepiece areas corresponding to areas where optical device eyepieces are to be formed on the substrate. Each eyepiece area includes a target thickness distribution. A base substrate thickness distribution of a base substrate is measured such that a target thickness change can be determined. The methods described herein are utilized along with the target thickness change to form a substrate with the target thickness distribution.

Abstract: Embodiments of the present disclosure generally relate to methods for forming a waveguide. Methods may include measuring a waveguide substrate, the waveguide having a substrate thickness distribution; and depositing an index-matched layer onto a surface of the waveguide, the index-matched layer having a first surface disposed on the waveguide substrate and a second surface opposing the first surface, wherein the index-matched layer is disposed only over a portion of the waveguide substrate, and a device slope of a second surface of the index-matched layer is substantially the same as the waveguide slope of the first surface of the waveguide.

Abstract: Method and apparatuses for diffuse optical tomography (DOT) are disclosed herein. A DOT device includes a substrate, one or more radiation sources, a plurality of detectors, and structures disposed over the second surface of the plurality of detectors. The one or more radiation sources are disposed over or under a surface of the substrate. Each detector of the plurality of detectors has a first surface and a second surface. The first surface is opposite the second surface. The first surface of the plurality of detectors disposed over or under the surface of the substrate. The method of DOT method of includes emitting and scattering radiation from one or more sources of a DOT device; detecting scattered radiation with a plurality of detectors of the DOT device; and translating the scattered radiation that is detected into data.

Abstract: Embodiments of the present disclosure generally relate to methods of forming a substrate having a target thickness distribution at one or more eyepiece areas across a substrate. The substrate includes eyepiece areas corresponding to areas where optical device eyepieces are to be formed on the substrate. Each eyepiece area includes a target thickness distribution. A base substrate thickness distribution of a base substrate is measured such that a target thickness change can be determined. The methods described herein are utilized along with the target thickness change to form a substrate with the target thickness distribution.

Abstract: Embodiments of the present disclosure describe waveguides having device structures with multiple portions and methods of forming the waveguide having multiportion device structures. The plurality of device structures are formed having two or more portions. The materials of the plurality of portions are chosen such that impedance matching is enabled between the portions to reduce reflection of light from the optical device.

Abstract: Substrates may be bonded according to a method comprising contacting a first bonding surface of a first substrate with a second bonding surface of a second substrate to form an assembly; and compressing the assembly in the presence of an oxidizing atmosphere under suitable conditions to form a bonding layer between the first and second surfaces, wherein the first bonding surface comprises a polarized surface layer; the second bonding surface comprises a hydrophilic surface layer; the first and second bonding surfaces are different.

Abstract: Substrates may be bonded according to a method comprising contacting a first bonding surface of a first substrate with a second bonding surface of a second substrate to form an assembly; and compressing the assembly in the presence of an oxidizing atmosphere under suitable conditions to form a bonding layer between the first and second surfaces, wherein the first bonding surface comprises a polarized surface layer; the second bonding surface comprises a hydrophilic surface layer; the first and second bonding surfaces are different.