Abstract: Optical devices and methods for expanding input light and outputting the expanded light include a waveguide and an input optical element to receive light incident on a first side of the waveguide. The input optical element includes an input reflective surface to reflect the received light into the waveguide. An intermediate diffractive optical element receives light in the waveguide from a first direction, and provides an expansion of the received light in a second direction perpendicular to the first direction. An output optical element includes an output reflective surface to reflect the expanded light out of the waveguide towards a viewer. The waveguide guides light along an optical path from the input optical element to the intermediate diffractive optical element and from the intermediate diffractive optical element to the output optical element.

Abstract: Optical devices and methods for expanding input light and outputting the expanded light include a waveguide and an input optical element to receive light incident on a first side of the waveguide. The input optical element includes an input reflective surface to reflect the received light into the waveguide. An intermediate diffractive optical element receives light in the waveguide from a first direction, and provides an expansion of the received light in a second direction perpendicular to the first direction. An output optical element includes an output reflective surface to reflect the expanded light out of the waveguide towards a viewer. The waveguide guides light along an optical path from the input optical element to the intermediate diffractive optical element and from the intermediate diffractive optical element to the output optical element.

Abstract: An optical display system has an optical waveguide combiner and one or more cameras. The one or more camera(s) is optically coupled to the optical waveguide combiner and have a field of view of at least one real object and at least one virtual object displayable by the optical display system. The one or more camera(s), which may be for example wafer level waveguide camera(s), may be disposed outside the usable field of view of an output coupler. The one or more camera(s) may be self-calibrated electronically using images captured by the cameras of one or more virtual object(s) displayable by the optical display system. AR/VR/MR registration of devices and/or displayed virtual objects with real objects may be implemented using the images captured by the one or more camera(s) of the displayed virtual objects and real world objects. Real object distance and/or spatial location relative to the optical waveguide combiners may be determined or estimated from the captured images.

Abstract: A processing unit, associated with a host device, adapted to receive a request to calculate a first physical address of an external device based on a second physical address of the host device; determine a tree of parallel adders corresponding to the division operation; obtain an output value from the tree of parallel adders based on the input values; and calculate the first physical address using the output value. The first physical address of the external device is to be calculated based on a division operation that divides the second physical address by a divisor. The tree of parallel adders is determined based on input values that include a number of bits of the second physical address and a divisor.

Abstract: Optical devices and methods include a first waveguide having a first surface and a second waveguide including a second surface. The first waveguide is at a fixed position relative to the second waveguide with the first surface at least partly facing the second surface, and the first surface includes a first positioning element. The first positioning element is a NanoImprint Lithography (NIL) structure. The optical device further includes an adhesive arranged for attaching the first surface to the second surface, where the first positioning element is arranged to control a position of the adhesive. The first positioning element includes a philic region adapted to attract the adhesive, or a phobic region adapted to repel the adhesive.

Abstract: Optical devices and methods include a first waveguide having a first surface and a second waveguide including a second surface. The first waveguide is at a fixed position relative to the second waveguide with the first surface at least partly facing the second surface, and the first surface includes a first positioning element. The first positioning element is a NanoImprint Lithography (NIL) structure. The optical device further includes an adhesive arranged for attaching the first surface to the second surface, where the first positioning element is arranged to control a position of the adhesive. The first positioning element includes a philic region adapted to attract the adhesive, or a phobic region adapted to repel the adhesive.

Abstract: A laser scanning projection system for use in illuminating a waveguide of an augmented reality or virtual reality headset is disclosed. The laser scanning projection system comprises a laser source configured to emit light towards a pair of polarising beam splitters. The polarising beam splitters direct light onto a plurality of mirrors through a plurality of quarter waveplates. The laser scanning projection system further comprises a waveguide having an input configured to receive the light such that the exit pupil formed at the laser scanner is relayed into the waveguide.

Abstract: A laser scanning projection system comprises a laser source configured to emit light towards a pair of polarizing beam splitters. The polarizing beam splitters direct light to reflect an odd number of times from a plurality of mirrors through one or more quarter waveplates, using a laser scanner comprising a scanning mirror to direct the light across an angular field of view, forming an exit pupil.

Abstract: Optical combiners are provided. The optical combiner may have a see through optically transparent substrate and a patterned region included in the optically transparent substrate and disposed along a wave propagation axis of the substrate. The patterned region may be partially optically reflective and partially optically transparent. The patterned region may comprise a plurality of optically transparent regions of the optically transparent substrate and a plurality of optically reflective regions inclined relative to the optical transparent substrate wave propagation axis. Augmented reality optical apparatus, such a head up display, may include the optical combiner.

Abstract: A technique facilitates patching of a tubing (42), e.g. casing (36), in a downhole environment (32). The technique employs a patching system comprising a plurality of expansion rings (48). The expansion rings (48) are moved downhole to a patch zone (38) along the tubing (34). Once in a desired position at the patch zone, the expansion rings (48) are expanded into engagement with an inner surface of the tubing. For example, the expansion rings may comprise seal elements (52) and/or anchor elements which are expanded into engagement with the inside surface. The patching system further comprises a patch (68) which may have a tubular shape. The patch is radially expanded in a manner which maintains a sealing engagement with the plurality of expansion rings (48) to create a sealed patch across a desired region in the patch zone.

Abstract: Optical hyperfocal reflective systems and methods are provided. One such optical hyperfocal reflective system has an optical substrate; an optical input coupling portion configured to input couple a collimated display image to the optical substrate; and an optical hyperfocal output coupling portion integrated with said optical substrate. The optical output coupling portion includes at least one hyperfocal reflective view port formed from a discrete optical hyperfocal reflector spot integrated with the optical substrate. The discrete optical hyperfocal reflector spot is sized to form a reflected discrete optical spot beam with a diameter at a target area such that a view of a discrete virtual display image portion, as seen by a lens-detector system locatable at the target area, is hyperfocused.

Abstract: Optical devices and methods for expanding input light and outputting the expanded light include a waveguide and an input optical element to receive light incident on a first side of the waveguide. The input optical element includes an input reflective surface to reflect the received light into the waveguide. An intermediate diffractive optical element receives light in the waveguide from a first direction, and provides an expansion of the received light in a second direction perpendicular to the first direction. An output optical element includes an output reflective surface to reflect the expanded light out of the waveguide towards a viewer. The waveguide guides light along an optical path from the input optical element to the intermediate diffractive optical element and from the intermediate diffractive optical element to the output optical element.

Abstract: Optical devices and methods include a first waveguide having a first surface and a second waveguide including a second surface. The first waveguide is at a fixed position relative to the second waveguide with the first surface at least partly facing the second surface, and the first surface includes a first positioning element. The first positioning element is a NanoImprint Lithography (NIL) structure. The optical device further includes an adhesive arranged for attaching the first surface to the second surface, whereiu the first positioning element is arranged to control a position of the adhesive. The first positioning element includes a philic region adapted to attract the adhesive, or a phobic region adapted to repel the adhesive.

Abstract: Optical combiners are provided. The optical combiner may have a see through optically transparent substrate and a patterned region included in the optically transparent substrate and disposed along a wave propagation axis of the substrate. The patterned region may be partially optically reflective and partially optically transparent. The patterned region may comprise a plurality of optically transparent regions of the optically transparent substrate and a plurality of optically reflective regions inclined relative to the optical transparent substrate wave propagation axis. Augmented reality optical apparatus, such a head up display, may include the optical combiner.

Abstract: Optical combiners are provided. The optical combiner may have a see through optically transparent substrate and a patterned region included in the optically transparent substrate and disposed along a wave propagation axis of the substrate. The patterned region may be partially optically reflective and partially optically transparent. The patterned region may comprise a plurality of optically transparent regions of the optically transparent substrate and a plurality of optically reflective regions inclined relative to the optical transparent substrate wave propagation axis. Augmented reality optical apparatus, such a head up display, may include the optical combiner.

Abstract: A laser scanning projection system for use in illuminating a waveguide of an augmented reality or virtual reality headset is disclosed. The laser scanning projection system comprises a laser source configured to emit light towards a pair of polarising beam splitters. The polarising beam splitters direct light onto a plurality of mirrors through a plurality of quarter waveplates. The laser scanning projection system further comprises a waveguide having an input configured to receive the light such that the exit pupil formed at the laser scanner is relayed into the waveguide.

Abstract: A technique facilitates patching of a tubing (42), e.g. casing (36), in a downhole environment (32). The technique employs a patching system comprising a plurality of expansion rings (48). The expansion rings (48) are moved downhole to a patch zone (38) along the tubing (34). Once in a desired position at the patch zone, the expansion rings (48) are expanded into engagement with an inner surface of the tubing. For example, the expansion rings may comprise seal elements (52) and/or anchor elements which are expanded into engagement with the inside surface. The patching system further comprises a patch (68) which may have a tubular shape. The patch is radially expanded in a manner which maintains a sealing engagement with the plurality of expansion rings (48) to create a sealed patch across a desired region in the patch zone.

Abstract: Optical hyperfocal reflective systems and methods are provided. One such optical hyperfocal reflective system has an optical substrate; an optical input coupling portion configured to input couple a collimated display image to the optical substrate; and an optical hyperfocal output coupling portion integrated with said optical substrate. The optical output coupling portion includes at least one hyperfocal reflective view port formed from a discrete optical hyperfocal reflector spot integrated with the optical substrate. The discrete optical hyperfocal reflector spot is sized to form a reflected discrete optical spot beam with a diameter at a target area such that a view of a discrete virtual display image portion, as seen by a lens-detector system locatable at the target area, is hyperfocused.

Abstract: An optical device includes a range of angularly selective reflectors are contained within an optical waveguide substrate and substantially optimized according to their reflector order within the sequence of reflectors. This configuration of reflectors ensures that the required angular information is passed through to the correct reflector within the sequence. The angular response in addition reduces or eliminates formation of secondary images carried to successive reflectors, resulting in undesired artefacts.

Abstract: An optical device includes a range of angularly selective reflectors are contained within an optical waveguide substrate and substantially optimized according to their reflector order within the sequence of reflectors. This configuration of reflectors ensures that the required angular information is passed through to the correct reflector within the sequence. The angular response in addition reduces or eliminates formation of secondary images carried to successive reflectors, resulting in undesired artefacts.