Abstract: A system includes a diffractive optical element configured to receive a first beam and a second beam interfering with one another to generate a first interference pattern. The diffractive optical element is also configured to forwardly diffract the first beam and the second beam to output a third beam and a fourth beam. The third beam and the fourth beam interfere with one another to generate a second interference pattern. The system also includes a detector configured to detect the second interference pattern.

Abstract: The disclosed optical assembly may include a photoalignment layer that includes photoalignment material (PAM) anchored to a substrate according to a specified surface anchoring. The optical assembly may also include a functional or transforming layer that is applied to the photoalignment layer. The transforming layer may modify the surface anchoring of the photoalignment layer to align with a polarization volume hologram layer. The polarization volume hologram layer of the optical assembly may be disposed on the transforming layer. Various other methods of manufacturing, systems, and apparatuses are also disclosed.

Abstract: A combined waste water and gas treatment system for efficiently decarbonizing and removing nitrogen, including a water feeding pump, a carbon capture device, an intermediate water tank, and an anaerobic ammonium oxidation reactor connected in sequence through pipelines, where the carbon capture device includes an anode chamber and a cathode chamber; an anode plate is arranged in the anode chamber; a cathode plate is arranged in the cathode chamber; a gas inlet pipe is further arranged at the cathode chamber; an air compressor is connected with the gas inlet pipe; a gas outlet pipe is arranged at a top of the carbon capture device; a water outlet in the intermediate water tank is fluidly communicated with a bottom end of the anaerobic ammonium oxidation reactor through a second water inlet pipe; the gas outlet pipe is fluidly communicated with the second water inlet pipe.

Abstract: A device includes a polymer stabilized blue phase liquid crystal (“PS-BPLC”) layer. The device also includes an alignment structure coupled with the PS-BPLC layer. LC molecules disposed in contact with the alignment structure are configured to have a spatially varying in-plane orientation pattern that is at least partially defined by the alignment structure. The PS-BPLC layer is configured to forwardly deflect a polarized light having a predetermined handedness, and transmit a polarized light having a handedness that is orthogonal to the predetermined handedness.

Abstract: A device includes a display element and a lens assembly. The lens assembly includes a polarization non-selective partial reflector, a polarization selective reflector and a polarization switch disposed at opposite sides of the polarization non-selective partial reflector, and a polarization selective transmissive lens disposed between the polarization switch and the polarization non-selective partial reflector. The device also includes a controller configured to: during a first sub-frame of a display frame, control the display element to display a first virtual sub-image including content of a first portion of a virtual image, and control the polarization switch to operate in a switching state. The controller is also configured to: during a second sub-frame of the display frame, control the display element to display a second virtual sub-image including content of a second portion of the virtual image, and control the polarization switch to operate in a non-switching state.

Abstract: A waveguide assembly is provided. The waveguide assembly includes a pair of pupil-replicating waveguides. The first pupil-replicating waveguide is configured for receiving an input beam of image light and providing an intermediate beam comprising multiple offset portions of the input beam. The second pupil-replicating waveguide is configured for receiving the intermediate beam from the first pupil-replicating waveguide and providing an output beam comprising multiple offset portions of the intermediate beam. The input beam may be expanded by the waveguide assembly in such a manner that pupil gaps are reduced or eliminated.

Abstract: A device includes a display element, and a lens assembly coupled with the display element. The lens assembly includes a first polarization selective reflector and a second polarization selective reflector each configured to be switchable between operating in an active state and a non-active state. The lens assembly includes a polarization non-selective partial reflector disposed between the first and second polarization selective reflectors. The device includes a controller configured to control, during a first time period, the display element to display a first virtual object, the first polarization selective reflector to operate in the active state, and the second polarization selective reflector to operate in the non-active state, and control, during a second time period, the display element to display a second virtual object, the first polarization selective reflector to operate in the non-active state, and the second polarization selective reflector to operate in the active state.

Abstract: A method, a system, and a non-transitory storage media for determining agent importance prediction for autonomous driving. Input features associated with agents present in an environment surrounding a vehicle are processed. Output features associated with the agents are determined based on the input features. An importance of each agent is predicted using the output features. One or more movements of the vehicle are determined based on the predicted agent importance.

Abstract: The present invention belongs to the field of sewage treatment, and relates to a method for preparing a modified natural wood material and an application thereof in sewage treatment. The method for preparing the modified natural wood material includes the following steps: S1. placing wood into a lignin removal solution, after a heating reaction, washing, impregnating, and lyophilizing the wood to obtain removed lignin wood; S2. blending TiO2 with NaBH4, performing low-heat reduction treatment, and then washing and drying to obtain reduced black titanium; S3. dispersing the reduced black titanium ultrasonically in a solvent, then coating dropwise on the removed lignin wood, and drying to obtain a modified natural wood material. The modified natural wood material prepared by the present invention has high disinfection and sterilization performance, and has the ability to remove bio-risk components.

Abstract: A device is provided. The device includes a polarization hologram polymer layer having a wavy surface, an optic axis of the polarization hologram polymer layer being configured with a spatially varying orientation in a first predetermined in-plane direction. The device also includes a compensation layer disposed at the wavy surface of the polarization hologram polymer layer and configured to compensate for the wavy surface in shape.

Abstract: A video generating method and apparatus, a device, and a medium are provided. The video generating method comprises: obtaining an image of a target object; and generating a target video according to the image of the target object, wherein the target video is a video comprising a swinging target part, and the target part is a part comprised in the target object.

Abstract: A device includes a polymer stabilized blue phase liquid crystal (“PS-BPLC”) layer. The device also includes an alignment structure coupled with the PS-BPLC layer. LC molecules disposed in contact with the alignment structure are configured to have a spatially varying in-plane orientation pattern that is at least partially defined by the alignment structure. The PS-BPLC layer is configured to forwardly deflect a polarized light having a predetermined handedness, and transmit a polarized light having a handedness that is orthogonal to the predetermined handedness.

Abstract: A method for preparing a cyclodextrin metal organic framework (CD-MOF) stable in aqueous phase, including: dissolving ?-cyclodextrin and solid potassium hydroxide in deionized water followed by magnetic stirring and ultrasonic treatment at room temperature, addition of methanol and stirring to obtain a reaction mixture; filtering the reaction mixture with a polytetrafluoroethylene membrane filter in a beaker; placing the beaker in methanol vapor to form a ?-CD-MOF crystal; washing the ?-CD-MOF crystal with ethanol followed by centrifugation and vacuum drying to obtain ?-CD-MOF; preparing a ?-CD-MOF-active substance complex by impregnation; and preparing an active substance-loaded ?-CD-MOF-Tween 80 complex by physical adsorption modification followed by washing with anhydrous ethanol and vacuum drying.

Abstract: A display device with a transparent illuminator and an liquid crystal (LC) display panel is disclosed. The transparent illuminator includes a light source and a transparent lightguide, which may be based on a slab of transparent material with zigzag light propagation of the illuminating light in the slab and/or a transparent photonic integrated circuit with singlemode ridge waveguides for spreading the illuminating light in a plane parallel to the plane of LC display panel. The lightguide includes a plurality of grating out-couplers whose position is coordinated with positions of LC pixels for higher throughput. A reflective offset-to-angle optical element may be provided to form an image in angular domain through the LC panel and through the transparent illuminator, resulting in an overall compact and efficient display configuration.

Abstract: An optical element includes a first birefringent medium layer with orientations of directors of first optically anisotropic molecules spatially varying with a first in-plane pitch and a first vertical pitch. The optical element also includes a second birefringent medium layer with orientations of directors of second optically anisotropic molecules spatially varying with a second in-plane pitch and a second vertical pitch. The second birefringent medium layer is optically coupled with the first birefringent medium layer and configured to reduce a diffraction of a light by the first birefringent medium layer. The first in-plane pitch is substantially the same as the second in-plane pitch, and the second vertical pitch is smaller than the first vertical pitch.

Abstract: A device includes a polarization non-selective partial reflector configured to transmit a first portion of a first light and reflect a second portion of the first light. The device also includes a polarization selective reflector configured to reflect the first portion of the first light received from the polarization non-selective reflector back to the polarization non-selective reflector. The device further includes a path correction device disposed between the polarization non-selective partial reflector and the polarization selective reflector, and configured to forwardly steer the first portion of the first light propagating between the polarization non-selective partial reflector and the polarization selective reflector.

Abstract: A display system includes a source of unpolarized image light, and a stack of polarization-selective optical elements operable to switchably convert the unpolarized image light into two orthogonally polarized light beams, each of which being switchable in at least one beam characteristic. An output polarizer selects one of the two orthogonally polarized light beams for providing to a user. A depolarizer may be disposed between an electronic display emitting polarized light and the stack. The depolarizer may be in the form of an LC bilayer with randomized in-plane optic axis.

Abstract: A waveplate is provided. The waveplate includes a first liquid crystal (“LC”) layer including LC molecules that are in-plane switchable by an external field to switch the waveplate between states of different phase retardances. The waveplate includes a second LC layer and a third LC layer sandwiching the first LC layer. Azimuthal angles of effective refractive index ellipsoids of the second LC layer and the third LC layer are different.

Abstract: A display device includes a directional illuminator providing a light beam, a display panel downstream of a directional illuminator, for receiving and spatially modulating the light beam, and a beam redirecting module downstream of the display panel, for variably redirecting the spatially modulated light beam. Steering the illuminating light by the beam redirecting module enables one to steer the exit pupil of the display device to match the user's eye location(s).

Abstract: A method for preparing a cyclodextrin metal organic framework (CD-MOF) stable in aqueous phase, including: dissolving ?-cyclodextrin and solid potassium hydroxide in deionized water followed by magnetic stirring and ultrasonic treatment at room temperature, addition of methanol and stirring to obtain a reaction mixture; filtering the reaction mixture with a polytetrafluoroethylene membrane filter in a beaker; placing the beaker in methanol vapor to form a ?-CD-MOF crystal; washing the ?-CD-MOF crystal with ethanol followed by centrifugation and vacuum drying to obtain ?-CD-MOF; preparing a ?-CD-MOF-active substance complex by impregnation; and preparing an active substance-loaded ?-CD-MOF-Tween 80 complex by physical adsorption modification followed by washing with anhydrous ethanol and vacuum drying.