Abstract: In some examples, a method includes downloading, from an application provider, a patch to be applied to a first application element and a stripped version of the application that does not include one or more application elements to be reused during installation of the application, decompressing the first application element to generate a decompressed version of the first application element, and decompressing the patch to generate a decompressed version of the patch. The method may also include applying the decompressed version of the patch to the decompressed version of the first application element to generate a patched application element, compressing the patched application element to generate a compressed patched application element, and installing the application using the compressed patched application element, the stripped version of the application, and the one or more application elements other than the first application element.

Abstract: Disclosed is a method of anodizing the interior surface of a heat transfer tube comprising placing a plurality of contact electrodes in electrical communication with, and along, an exterior surface of the heat transfer tube, inserting a counter electrode into an interior space of the heat transfer tube, providing an electrolytic solution to the interior space of the heat transfer tube, passing an electric current between the plurality of contact electrodes and the counter electrode through the electrolytic solution, forming an oxidation layer along the interior surface of the heat transfer tube, wherein the oxidation layer has an oxidation layer thickness that decreases along a length of the heat transfer tube, stopping the passage of the electric current, removing the electrolytic solution, and applying a sealing solution to a surface of the oxidation layer to form a sealed oxidation layer along the interior surface of the heat transfer tube.

Abstract: Systems and methods for managing multi-objective alignments in imprinting (e.g., single-sided or double-sided) are provided. An example system includes rollers for moving a template roll, a stage for holding a substrate, a dispenser for dispensing resist on the substrate, a light source for curing the resist to form an imprint on the substrate when a template of the template roll is pressed into the resist on the substrate, a first inspection system for registering a fiducial mark of the template to determine a template offset, a second inspection system for registering the imprint on the substrate to determine a wafer registration offset between a target location and an actual location of the imprint, and a controller for controlling to move the substrate with the resist below the template based on the template offset, and determine an overlay bias of the imprint on the substrate based on the wafer registration offset.

Abstract: Medical dressings include a non-woven polymeric nanofiber mat embedded within a chitosan hydrogel matrix. The dressings may be obtained by electro spinning of polymeric nanofibers and thereafter incorporating a chitosan hydrogel into interstices of the mat by vacuum or positive pressure assistance. The resulting medical dressings may be optically transparent (e.g., at least about 50% up to about 95% light transmittance), flexible, and mechanically robust. The dressings may also incorporate self-adhesion promoters to allow self-adhesion to biological tissue, e.g., ocular surfaces, and/or therapeutic agents which are capable of delivering therapeutics (e.g. stem cells, drugs and the like) to the tissue surface. The dressings are especially useful as ocular bandages for the treatment and repair of ocular wounds.

Abstract: A heat transfer system is disclosed that includes a heat transfer fluid circulation loop, and also a heat exchanger that includes an aluminum alloy exterior surface having thereon a top surface coat derived from a composition comprising a trivalent chromium salt and an alkali metal hexafluorozirconate.

Abstract: Systems and methods for managing multi-objective alignments in imprinting (e.g., single-sided or double-sided) are provided. An example system includes rollers for moving a template roll, a stage for holding a substrate, a dispenser for dispensing resist on the substrate, a light source for curing the resist to form an imprint on the substrate when a template of the template roll is pressed into the resist on the substrate, a first inspection system for registering a fiducial mark of the template to determine a template offset, a second inspection system for registering the imprint on the substrate to determine a wafer registration offset between a target location and an actual location of the imprint, and a controller for controlling to move the substrate with the resist below the template based on the template offset, and determine an overlay bias of the imprint on the substrate based on the wafer registration offset.

Abstract: An anodization apparatus is disclosed that includes an anode holder adapted to hold a tube, such that the tube is adapted to receive electrolyte and the tube has a first surface profile formed on an inner surface of the tube. The anodization apparatus also includes a cathode holder adapted to hold a cathode concentrically in the tube, such that the cathode has a second surface profile formed an outer surface of the cathode and the outer surface faces the inner surface of the tube. The cathode holder and the anode holder are adapted to supply electric potential of a predetermined current density to the cathode and the tube, respectively, and a surface area ratio between the first surface profile and the second surface profile is maintained within a predetermined range to facilitate formation of a homogenized anodized coat on the second surface profile.

Abstract: A compressor is disclosed, including an outer casing and a fluid guide around a cavity within the casing. An inlet is in operative fluid communication with the cavity, and an outlet is also in operative fluid communication with the cavity. A prime mover includes an actuator disposed in the cavity. The actuator includes a surface arranged to receive fluid in the cavity from the inlet, impart compression to received fluid in the cavity, and discharge compressed fluid to the outlet. A surface of the compressor includes a cladding of a second aluminum alloy over a core of a first aluminum alloy, wherein the second aluminum alloy is less noble than the first aluminum alloy and includes an alloying element selected from tin, indium, gallium, or combinations thereof.

Abstract: A heat transfer system is disclosed that includes a heat transfer fluid circulation loop, and also a heat exchanger that includes an aluminum alloy exterior surface having thereon a top surface coat derived from a composition comprising a trivalent chromium salt and an alkali metal hexafluorozirconate.

Abstract: A heat exchanger is disclosed. The heat exchanger includes a hollow tube extending from a tube inlet to a tube outlet. The hollow tube includes a wall that includes a core of a first aluminum alloy, and a cladding over the core of a second aluminum alloy. The second aluminum alloy is less noble than the first aluminum alloy and includes an alloying element selected from tin, indium, or gallium, or combinations thereof. A first fluid flow path is disposed along an inner surface of the wall from the tube inlet to the tube outlet, and a second fluid flow path is disposed across an outer surface of the wall.

Abstract: A system includes a first chuck operable to support a stencil including a plurality of apertures, a wafer chuck operable to support and move a wafer including a plurality of incoupling gratings, a first light source operable to direct light to impinge on a first surface of the stencil, and one or more second light sources operable to direct light to impinge on the wafer. The system also includes one or more lens and camera assemblies operable to receive light from the first light source passing through the plurality of apertures in the stencil and receive light from the one or more second light sources diffracted from the plurality of incoupling gratings in the wafer. The system also includes an alignment system operable to move the wafer with respect to the stencil to reduce an offset between aperture locations and incoupling grating locations.

Abstract: An example system for molding a photocurable material into a planar object includes a first mold structure having a first mold surface, a second mold structure having a second mold surface, and one or more protrusions disposed along at least one of the first mold surface or the second mold surface. During operation, the system is configured to position the first and second mold structures such that the first and second mold surfaces face each other with the one or more protrusions contacting the opposite mold surface, and a volume having a total thickness variation (TTV) of 500 nm or less is defined between the first and second mold surfaces. The system is further configured to receive the photocurable material in the volume, and direct radiation at the one or more wavelengths into the volume.

Abstract: A display device comprises a waveguide configured to guide light in a lateral direction parallel to an output surface of the waveguide. The waveguide is further configured to outcouple the guided light through the output surface. The display device additionally comprises a broadband adaptive lens assembly configured to incouple and to diffract therethrough the outcoupled light from the waveguide. The broadband adaptive lens assembly comprises a first waveplate lens comprising a liquid crystal (LC) layer arranged such that the waveplate lens has birefringence (?n) that varies in a radially outward direction from a central region of the first waveplate lens and configured to diffract the outcoupled light at a diffraction efficiency greater than 90% within a wavelength range including at least 450 nm to 630 nm. The broadband adaptive lens assembly is configured to be selectively switched between a plurality of states having different optical powers.

Abstract: A heat exchanger is disclosed. The heat exchanger includes a hollow tube extending from a tube inlet to a tube outlet. The hollow tube includes a wall that includes a core of a first aluminum alloy, and a cladding over the core of a second aluminum alloy. The second aluminum alloy is less noble than the first aluminum alloy and includes an alloying element selected from tin, indium, or gallium, or combinations thereof. A first fluid flow path is disposed along an inner surface of the wall from the tube inlet to the tube outlet, and a second fluid flow path is disposed across an outer surface of the wall.

Abstract: This disclosure provides techniques for manufacturing parts using digital twin(s) to manage various aspects of the manufacturing system. An example method may include representing a manufacturing system using a digital twin. In some cases, representing the manufacturing system includes modeling, in the digital twin, digital representations that correspond to a number of physical components of the manufacturing system. The physical components include at least: a manufacturing material, a working environment for deposition of the manufacturing material (e.g., for additive manufacturing), a tool to manipulate the manufacturing material between at least two matter states in the working environment, and sensors measuring behaviors of the tool, the working environment, and the manufacturing material. The method may further include receiving a manufacturing production task.

Abstract: A method of aligning a stencil to an eyepiece wafer includes providing the stencil, positioning the stencil with respect to a first light source, and determining locations of at least two stencil apertures. The method also includes providing the eyepiece wafer. The eyepiece wafer includes at least two eyepiece waveguides, each eyepiece waveguide including an incoupling grating and a corresponding diffraction pattern. The method further includes directing light from one or more second light sources to impinge on each of the corresponding diffraction patterns, imaging light diffracted from each incoupling grating, determining at least two incoupling grating locations, determining offsets between corresponding stencil aperture locations and incoupling grating locations, and aligning the stencil to the eyepiece wafer based on the determined offsets.

Abstract: An example system for molding a photocurable material into a planar object includes a first mold structure having a first mold surface, a second mold structure having a second mold surface, and one or more protrusions disposed along at least one of the first mold surface or the second mold surface. During operation, the system is configured to position the first and second mold structures such that the first and second mold surfaces face each other with the one or more protrusions contacting the opposite mold surface, and a volume having a total thickness variation (TTV) of 500 nm or less is defined between the first and second mold surfaces. The system is further configured to receive the photocurable material in the volume, and direct radiation at the one or more wavelengths into the volume.

Abstract: A display device includes a waveguide assembly comprising a waveguide configured to outcouple light out of a major surface of the waveguide to form an image in the eyes of a user. An adaptive lens assembly comprises a switchable waveplate assembly. The switchable waveplate assembly includes quarter-wave plates on opposing sides of a switchable liquid crystal layer, and electrodes on the quarter-wave plates in the volume between the quarter-wave plates. The electrodes can selectively establish an electric field and may serve as an alignment structure for molecules of the liquid crystal layer. Portions of the adaptive lens assembly may be manufactured by roll-to-roll processing in which a substrate roll is unwound, and alignment layers and liquid crystal layers are formed on the substrate as it moves towards a second roller, to be wound on that second roller.

Abstract: In some embodiments, a head-mounted, near-eye display system comprises a stack of waveguides having integral spacers separating the waveguides. The waveguides may each include diffractive optical elements that are formed simultaneously with the spacers by imprinting. The spacers are disposed on one major surface of each of the waveguides and indentations are provided on an opposite major surface of each of the waveguides. The indentations are sized and positioned to align with the spacers, thereby forming a self-aligned stack of waveguides. Tops of the spacers may be provided with light scattering features, anti-reflective coatings, and/or light absorbing adhesive to prevent light leakage between the waveguides. As seen in a top-down view, the spacers may be elongated along the same axis as the diffractive optical elements. The waveguides may include structures (e.g.

Abstract: A display device comprises a waveguide configured to guide light in a lateral direction parallel to an output surface of the waveguide. The waveguide is further configured to outcouple the guided light through the output surface. The display device additionally comprises a broadband adaptive lens assembly configured to incouple and to diffract therethrough the outcoupled light from the waveguide. The broadband adaptive lens assembly comprises a first waveplate lens comprising a liquid crystal (LC) layer arranged such that the waveplate lens has birefringence (?n) that varies in a radially outward direction from a central region of the first waveplate lens and configured to diffract the outcoupled light at a diffraction efficiency greater than 90% within a wavelength range including at least 450 nm to 630 nm. The broadband adaptive lens assembly is configured to be selectively switched between a plurality of states having different optical powers.