Abstract: A laser scribing method for perovskite thin-film solar cells is provided, in which a linearly polarized Gaussian beam is emitted by a laser, and converted into a circularly polarized beam through a quarter-wave plate. The circularly polarized beam is expanded to a target diameter by a beam expander system to obtain a target expanded beam. The target expanded beam is adjusted by an optical path adjustment system to enter a diffractive optical element (DOE) shaping module for beam shaping to obtain a shaped beam. The shaped beam is focused by an optical focusing module to obtain a focused beam with the focus on a surface film of a to-be-processed product, and the to-be-processed product is moved such that a groove is scribed thereon. A laser scribing device is also provided.

Abstract: A multi-laser beam focusing and scribing device with following function includes a beam splitter module, a focusing lens module, a first shaft, a diffractive optical element (DOE) beam shaping lens, a second adjustment shaft, a coaxial charge-coupled device (CCD) vision module, and a distance-measuring sensor. The first adjustment shaft is configured to adjust a focus position, and the second adjustment shaft is configured to adjust a spacing between scribed lines, and is electrically-powered. The beam splitter module is configured to split an incident laser beam into a plurality of sub-beams.

Abstract: A method for controlling a near eye display system, includes determining a target area of a display of the near eye display system, the target area of the display being an area that a user wearing the near eye display system is looking at, and controlling a brightness of the target area of the display of the near eye display system to be different from a brightness of a non-target area of the display of the near eye display system, to cause a diameter of a pupil of the user to be less than or equal to a diameter threshold.

Abstract: Provided is a light emitting diode (LED) light source and an LED incandescent lamp with a coating cladding layer that includes a LED light source, which includes one or more LED chips coated with a phosphor material underlying layer exhibiting a colored appearance; and an outer coating having a coating composition, the coating composition includes a solvent, a binder, and a pigment. The LED light source having a small thickness, aesthetic appearance, and high light transmittance.

Abstract: Aspects of the disclosure provide a liquid crystal (LC) device, a head mounted display (HMD) system, and a method of tuning the HMD system. The LC device includes a first electrode structure disposed on a first substrate with an elliptical shape. The first electrode structure includes parallel first segments connected by second segments. The LC device includes a plurality of first control electrodes electrically coupled with the first electrode structure. The plurality of first control electrodes is configured to form LC lenses at different positions. Each of the LC lenses at the different positions is formed when electrical signals are applied to a subset of the plurality of first control electrodes that is associated with the respective LC lens. The LC device includes a second electrode structure disposed on a second substrate and at least one second control electrode electrically coupled with the second electrode structure.

Abstract: Herein disclosed is a three-dimensional depth-sensing device and an illumination module for the same. The illumination module for a three-dimensional depth-sensing device comprises: a light source; a diffuser, diffusing light from the light source; a tunable lens, positioned after the diffuser and having at least three statuses; and a control unit, setting the tunable lens to one of the at least three statuses. The at least three statuses of the tunable lens correspond to at least three configurations between a dot light and a flood light.

Abstract: Provided is a CCT switchable lamp that includes a light-emitting assembly, having a bulb and conductive wires at the bottom of the bulb, a drive unit having a PCB and a CCT switching switch on the PCB, a base component at the bottom of the light-emitting assembly accommodating the drive unit, and a central connection pin at an axial end of the base component away from the bulb and being electrically connected to the drive unit by a connection conductive wire, the CCT switching switch is located on a central axis of the lamp and is rotatable around the central axis to switch the CCT, and the lamp also includes a rotatable annular member connected to the CCT switching switch, the center of the annular member is located on the central axis, and the annular member is rotatable around the central axis to drive rotation of the CCT switching switch.

Abstract: A computer-implemented method for addressing testing includes, applying to addressing middleware in a test cloud architecture, creating virtual middleware in response to a received creation request for the virtual middleware. In response to a configuration request for the virtual middleware, at least one actual address is selected from actual addresses of nodes as an address of the virtual middleware, and a channel is established from the virtual middleware to a user according to the address of the virtual middleware. When the addressing middleware is in test, a test case containing an addressing request used to address the virtual middleware is run. Based on attribute information of a user who sends the addressing request and the channel, an address of the virtual middleware is determined as a test address and compared with a pre-determined standard address as a test result of the addressing middleware.

Abstract: A rolling and sliding adaptive device for guiding and fixing a drill pipe includes a mounting platform, where the mounting platform is provided with a through hole for the drill pipe to pass through. Multiple rolling and sliding support mechanisms are arranged around the through hole. The rolling and sliding support mechanisms each include a support seat. The support seat is provided with a contact element telescopic and swingable on the support seat. A telescopic drive mechanism is provided between the contact element and the support seat. The contact elements on the multiple rolling and sliding support mechanisms form a funnel-shaped structure with a large upper part and a small lower part around the through hole. The rolling and sliding adaptive device is used on a deep in-situ high-fidelity coring calibration platform for accurate positioning of an assembly process of a multi-section drill pipe bin.

Abstract: Embodiments of the present disclosure provide a physical test system of large-scale three-dimensional multi-functional landslide-prevention and control structure. The system comprises a model test tank, a bidirectional servo loading system, a multi-scale model transformation system, a sliding surface evolution visualization system, a positive pressure monitoring system, an artificial rainfall system, and a control system. The bidirectional servo loading system applies a horizontal load and a vertical load, and the multi-scale model transformation system includes a plurality of retractable counterforce brackets, configured to change a width of the model test tank; and the sliding surface evolution visualization system includes a plurality of filming devices, configured to record a whole evolution process of a landslide sliding surface evolution.

Abstract: A pile-net flexible cable barrier structure includes a first V-shaped pile, a second V-shaped pile, a left tension pile, a right tension pile, a first flexible cable net disposed between the left tension pile and the first V-shaped pile, a second flexible cable net disposed between the first V-shaped pile and the second V-shaped pile, and a third flexible cable net disposed between the second V-shaped pile and the right tension pile. A second pile body of the first V-shaped pile are disposed parallel to a third pile body of the second V-shaped pile, openings of the first V-shaped pile and the second V-shaped pile face a same side, the left tension pile are disposed parallel to the first pile body of the first V-shaped pile, and the right tension pile are disposed parallel to the fourth pile body of the second V-shaped pile.

Abstract: Methods and systems for cross-platform user profiling based on disparate datasets using machine learning models. Specifically, the methods and systems comprising retrieving a cross-platform profile, wherein the cross-platform profile comprises a profile linked to an account, for a user, that is used across multiple assets. The methods and system may then update a status of the cross-platform profile based on incidents detected using machine learning models. The methods and system may then generate for presentation, in a user interface for the account, the status of cross-platform profile.

Abstract: Provided are a video call method and a display apparatus. The display apparatus includes: a display, an audio player, a communicator, a user input interface, and a controller. The controller is configured to: control the display to present a first area and a second area on a call interface for a video call, where the first area is for presenting one or more video chatting windows, and the second area is for presenting one or more voice chatting windows; obtain a quantity Y for indicating number of parties currently participating in the video call from the sever; and in response to the quantity Y being greater than a preset quantity X of channels that the display apparatus is able to support, control the display to present X video chatting windows in the first area, and control the display to present (Y-X) voice chatting windows in the second area.

Abstract: An optical lens assembly for a near-eye display device includes a light box and a diffractive optical element (DOE). The light box has a first layer facing a display screen of the near-eye display device and a second layer facing the DOE. The light box is configured to receive a first light from a display screen of the near-eye display device and transmit at least a portion of the first light to the DOE through a folded optical path, where the first layer and the second layer are flat. The DOE aligned with an optical axis of an eye and is configured to receive a second light from the light box and converge the second light to the eye.

Abstract: Aspects of the disclosure provide an optical system. The optical system includes a first lens, a second lens, and a vision correction adapter. The first lens includes a first optically transparent member having a first surface and a second surface. A second lens includes a second optically transparent member having a third surface and a fourth surface. The vision correction adapter is positioned between the first lens and the second lens. The first lens and the second lens are spaced apart by a thickness of the vision correction adapter, and the thickness of the vision correction adapter is selected to correct for one of nearsightedness or farsightedness. A center region of the vision correction adapter includes an opening.

Abstract: Aspects of the disclosure provide an optical system. The optical system includes a polarization controller that controls polarization states of light beams such that a polarization state of each light beam passing through the polarization controller has one of a first polarization state and a second polarization state. The optical system includes a beam splitter, a reflective polarizer, and one or more lenses between the beam splitter and the reflective polarizer. If a polarization state of a first light beam of the light beams that passes through the polarization controller has the first polarization state, the first light beam passes the one or more lenses only one time. If a polarization state of a second light beam of the light beams that passes through the polarization controller has the second polarization state, the second light beam passes the one or more lenses more than one time.

Abstract: Aspects of the disclosure provide an achromatic lens. The achromatic lens can include a first lens and a second lens. The first lens with a negative focal length includes a first optically transparent member having a first surface and a second surface. The second lens is attached to the first lens at the second surface. The second lens having a positive focal length includes a second optically transparent member having a third surface and a fourth surface. A second chromatic aberration of the second lens is reduced by a first chromatic aberration of the first lens. The second surface of the first lens includes a first Fresnel structure.

Abstract: Aspects of the disclosure provide an optical system that includes a first lens including a first optically transparent member having a first surface and a second surface and a reflective polarizer on the first surface. The first surface of the first lens includes a first region and a second region, the first region of the first surface is smooth and at a center of the first surface, and the second region of the first surface includes a Fresnel structure and surrounds the first region. The reflective polarizer includes a first region and a second region, the first region of the reflective polarizer matches a profile of the first region of the first surface of the first lens, and the second region of the reflective polarizer matches a profile of the second region of the first surface of the first lens.

Abstract: Aspects of the disclosure provide a first lens. The first lens can include an optically transparent member having a first surface and a second surface. The optically transparent member can be configured to receive light from a display device via the first surface. The received light exits the optically transparent member through the second surface. The first surface and the second surface of the optically transparent member can be aspheric. An in inner surface of the first surface is convex, and an outer surface of the first surface is concave. The inner surface is surrounded by the outer surface of the first surface. A thickness of a central region of the first lens can decrease from a center of the first lens, and a thickness of a peripheral region of the first lens can increase from a boundary of the central region.

Abstract: A method for controlling a near eye display system, includes determining a target area of a display of the near eye display system, the target area of the display being an area that a user wearing the near eye display system is looking at, and controlling a brightness of the target area of the display of the near eye display system to be different from a brightness of a non-target area of the display of the near eye display system, to cause a diameter of a pupil of the user to be less than or equal to a diameter threshold.