3145results about "Polarising elements" patented technology

A coating composition comprises: a fluoro-aliphatic group-containing copolymer comprising a repeating unit A corresponding to a fluoro-aliphatic group-containing monomer, and a repeating unit B corresponding to at least one monomer, wherein each of the I / O values of said at least one monomer constituting the repeating unit B is 1.0 or less.

The invention provides a metasurface structure and method for realizing transverse polarization focusing light splitting, and the metasurface structure comprises a substrate and a surface structure which is disposed on the substrate. The surface structure is composed of a plurality of sub-wavelength structure units which are arranged in a concentric circular ring mode. The sub-wavelength structure unit performs polarization-independent focusing of an incident beam through transmission phase regulation and control, and performs polarization-dependent light splitting of the incident beam through geometric phase regulation and control. The point diffraction plate can realize light beam splitting and focusing functions related to polarization, has the advantages of being simple in structure and high in integration level, solves the technical problems that an existing point diffraction plate does not support synchronous phase-shifting interference measurement and the contrast ratio of interference fringes is low, and enables the contrast ratio of the interference fringes of point diffraction interference measurement to be higher, the resolving precision to be higher and the resolving speed to be higher.

The invention discloses a large-view-field high-resolution imaging system based on polarization regulation and control, the large-view-field high-resolution imaging system comprises a metasurface system array and a camera along the direction of a light path, and the metasurface system array comprises a plurality of pairs of metasurface systems which are distributed in an array; each pair of metasurface systems comprises a first metasurface system and a second metasurface system; the first metasurface system is used for performing high-resolution imaging and large-view-field imaging on a first polarization light beam and a second polarization light beam of an incident light beam respectively; the second metasurface system is used for performing large-view-field imaging and high-resolution imaging on the first polarization-state light beam and the second polarization-state light beam respectively; the camera is used for acquiring and fusing images formed by different metasurface systems so as to capture a high-resolution central region of interest and surrounding environment information of a wide field of view. The system can efficiently realize higher imaging quality.

[Problem] To provide a novel polarizing plate that inhibits a poor external appearance of a polarizing film due to thermal contraction, and that excels in durability. [Solution] This polarizing plate comprises a polarizing film composed of a polyvinyl alcohol–based resin, and a supporting base material layered on at least one of the surfaces of the polarizing film with a bonding layer therebetween, said supporting base material being light-transmitting, and is characterized in that the bonding layer is composed of a molecular bonding agent that binds the polarizing film and the supporting base material together via a chemical bond.

Methods, apparatus, devices, and systems for displaying three-dimensional objects by individually diffracting different colors of light are provided. In one aspect, an optical device includes: a first optically diffractive component including a first diffractive structure configured to diffract a first color of light having a first incident angle at a first diffracted angle, a second optically diffractive component including a second diffractive structure configured to diffract a second color of light having a second incident angle at a second diffracted angle, a first reflective layer configured to totally reflect the first color of light having the first incident angle and transmit the second color of light, and a second reflective layer configured to totally reflect the second color of light having the second incident angle. The first reflective layer is between the first and second diffractive structures, and the second diffractive structure is between the first and second reflective layers.

The invention provides a terahertz tunable polarization converter and a design method thereof. The polarization converter is composed of three layers of metasurface structures. A Fabry-Perot cavity is formed through an orthogonal grating, horizontal polarization destructive interference and cross polarization constructive interference are achieved through polarization selectivity, and therefore the cross polarization average conversion efficiency up to 95% or above is achieved. Meanwhile, the working frequency of the device can be effectively adjusted by adjusting the interlayer spacing. The design method comprises the specific implementation steps that the initial structure size and the material attribute of the three-layer metasurface are set; setting an objective function representing the performance of the terahertz polarization converter, and importing the initial structure of the polarization converter into electromagnetic field simulation software for simulation to obtain an objective function value of the initial structure of the polarization converter; and performing iterative optimization on the three-layer metasurface initial structure by using a multi-target particle swarm optimization algorithm until the optimized structure meets the target requirement, and obtaining the optimal design parameters of the metasurface structure.

Provided are: an optical laminate which contains a plurality of liquid crystal layers in which liquid crystal compounds are oriented in different states, and which has a low reflectivity of a regular reflection component when light is incident thereon; a display device; and a sensor. The optical laminate includes a first liquid crystal layer containing a liquid crystal compound and a second liquid crystal layer containing a liquid crystal compound, the first liquid crystal layer is adjacent to the second liquid crystal layer, and the first liquid crystal layer has a liquid crystal alignment pattern which changes while continuously rotating in at least one in-plane direction from the optical axis of the liquid crystal compound. The optical laminate satisfies predetermined requirements.

Provided is an optical laminate with excellent durability and an image display device formed of the optical laminate. The optical laminate includes a pressure sensitive adhesive layer 1, a specific laminate including a resin layer and a light absorption anisotropic layer which are adjacent to each other, and a pressure sensitive adhesive layer 2 in order, in which the light absorption anisotropic layer contains a dichroic substance, the pressure sensitive adhesive layer 1 is adjacent to the resin layer of the specific laminate, and a storage elastic modulus Ep of the pressure sensitive adhesive layer 1 and a storage elastic modulus Ea and a moist heat strain δa of the resin layer satisfy Expression (1-1) ¼ (3×Ep / Ea)2 / 3>δa.

The invention discloses a polarization converter and a preparation method thereof. The polarization converter comprises a silicon dioxide substrate, a silicon core waveguide, a zinc oxide supporting layer, an asymmetric silver layer and a silicon dioxide substrate, the silicon core waveguide and the zinc oxide supporting layer are attached to the silicon dioxide substrate to form a substrate structure; the asymmetric silver layer is attached to the silicon dioxide substrate to form a silver film structure; the silver film structure is connected with the substrate structure through the zinc oxide supporting layer, and the asymmetric silver layer is located over the silicon core waveguide and does not make contact with the silicon core waveguide. Through a non-contact structure of the asymmetric silver layer and the silicon core waveguide, air is introduced as a low-refractive-index medium to construct a hollow mixed plasmon waveguide structure, so that the transmission loss is effectively reduced, and meanwhile, based on introduction of the asymmetric silver layer, the high integration level and the high conversion rate of the polarization converter are effectively guaranteed.

The invention discloses a monocular four-dimensional imaging device and method based on a metasurface. The monocular four-dimensional imaging device comprises an image sensor and an imaging optical system arranged in front of the image sensor. Wherein the imaging optical system comprises a metasurface, the metasurface is designed to simultaneously generate a self-acceleration Airy point spread function with depth-dependent lateral displacement for incident left-hand circularly polarized light and right-hand circularly polarized light, and the self-acceleration Airy point spread function can generate a self-acceleration Airy point spread function with depth-dependent lateral displacement under the condition that a mechanical moving part is not used. Carrying out polarization separation and focusing on the left-hand circularly polarized light and the right-hand circularly polarized light; the image sensor is used for recording a mixed image containing the left-hand circularly polarized light information and the right-hand circularly polarized light information at the same time through single exposure so as to obtain three-dimensional depth and polarization information of the metasurface, namely monocular four-dimensional imaging of the metasurface. The scene perception and understanding capability of a machine is greatly enhanced, and the method has unique advantages in the aspects of target identification, material discrimination, severe environment perception and the like.

The invention provides a polaroid, an optical functional layer coating and a display device. The polaroid comprises an optical function layer, and the optical function layer comprises thermocuring resin, first ultraviolet curing resin, second ultraviolet curing resin and needle-shaped particles. The molecular weight of the thermocuring resin is 500,000-1,500,000, the number of acrylic functional groups of the first ultraviolet curing resin is 5-50, the number of acrylic functional groups of the second ultraviolet curing resin is 2-5, and the ratio of the length of the needle-shaped particles to the diameter of the cross section is 5-60. The optical functional layer coating comprises the components, a photoinitiator, a dispersing agent and a solvent, and the mass of the needle-shaped particles accounts for 6-18% of the mass of the optical functional layer coating. The display device comprises a display panel and a polaroid. Through specific combination of the three kinds of resin and the needle-shaped particles, the technical problem that the viewing angle increasing capacity of the polaroid is limited is solved.

A visible light communication apparatus comprising: multiple sources, at least one source being a light source configured to transmit a data signal; and a receiver comprising a polarizer, operating in a visible light spectrum, the receiver configured to receive visible light energy from the one or more sources; the polarizer configured to filter multiple noise signals and allow the data signal to pass through to the receiver. Allows more signal light than background light to reach the sensor, the polarizer improves signal to noise ratio for outdoor visible light communication.

The problem addressed by the present invention is to provide a method for manufacturing an optical system for a head-mounted display that allows realization of a head-mounted display that prevents unexpected blurring and bleeding and that is excellent in a sense of immersion. The problem is solved by a method for manufacturing an optical system for a head-mounted display, the method including a bonding step, which is a manufacturing step for a laminate formed by laminating a plurality of optical members and in which a plurality of optical members are bonded and fixed by laminating one optical member on a surface of another optical member, wherein the bonding step includes a step for applying a bonding layer forming composition to one optical member, a step for applying a bonding layer forming composition to another optical member, and a step for using a nip roller to laminate the one optical member and the another optical member such that the bonding layer forming compositions face each other.

To achieve both improvement of visibility (interference unevenness or the like) and reduction of floating between liquid crystal retardation layers in a retardation layer laminate and an optical laminate.SOLUTION: The retardation layer laminate includes a first liquid-crystal retardation layer, a first bonding layer having a thickness of 20 to 200nm, and a second liquid-crystal retardation layer in this order. The atomic concentration of Si atoms on the first bonding layer side of at least one of the first and second liquid-crystal retardation layers is 0.5 to 10at%.SELECTED DRAWING: Figure 1

For example, a lighting device capable of FOV switching is provided.The lighting device change a projection range of first light and a projection range of second light by causing a light-emitting unit and an optical member disposed on the optical path of the first light and the second light to act differently on the first light and the second light, the light-emitting unit including a first light-emitting element that emits the first light and a second light-emitting element that emits the second light.

The invention relates to a laminated staggered sub-wavelength polarization grating structure and a preparation method thereof, through staggered arrangement of a first metal grating layer and a second metal grating layer, transmission of polarized light of a transverse electric field can be effectively inhibited, and the extinction ratio is remarkably improved. Through the substrate, the first dielectric layer, the second dielectric layer, the first metal grating layer, the third dielectric layer and the second metal grating layer which are sequentially arranged from bottom to top, the whole device obtains a higher extinction ratio while keeping high transmittance, the overall structure is simple, the processing difficulty and cost are reduced, and the production efficiency is improved. And the number of the used dielectric layers and metal layers is small, the thickness requirement is low, and therefore it is ensured that the cost is controllable.

A look-in type wide-field video display apparatus includes an ocular optical system (OC), a circular polarizing plate, and a display device (D) positioned in order from a user's eye side. The OC includes a first lens (L1) and a second lens (L2) positioned in order from the user's eye side, a surface on the user's eye side in the L1 is aspherical, a surface on a D side in the L1 is planar or approximately planar, and a reflective polarizing plate and a ¼-wavelength plate are laminated on the surface on the D side in this order from the user's eye side, a surface on the user's eye side in the L2 is aspherical, and is convex toward the user's eye side around an optical axis of the OC or is approximately planar, and a surface on the D side in the L2 is aspherical convex toward the D side.

Systems, methods, and apparatus related to sensor data processing for a vehicle to improve operation when sunlight or other bright light enters a sensor of the vehicle. In one approach, adjustable filtering is configured for a sensor of a vehicle. In one example, an optical filter is positioned on the path of light that reaches an image sensor of a camera. For example, the filtering improves ability to stay in adaptive cruise control when driving into direct sunlight at sunset. The optical filters can have controllable properties such as polarization. In one example, a controller of the vehicle is configured to automatically adjust the properties of the optical filter to improve image quality to improve object recognition. In another example, a camera is configured with composite vision that uses sensors in different radiation spectrums (e.g., visible light, and infrared light). The composite vision can provide enhanced vision capability for an autonomous vehicle that is driving in the direction of the sun.

This specification discloses a light control film and a display device to which the light control film is applied. The light control film, when applied to a display device, enables precise control of the light output angle, ensuring high transmittance, high brightness, and excellent resolution within the light output angle, and blocking unwanted light that can cause defects such as ghosts or moire. Even when applied to an OLED display, the light control film exhibits the above-mentioned performance without causing defects such as stripes that are noticeable to a viewer. This specification also discloses a display device to which the light control film is applied.

The invention relates to the technical field of optical elements, in particular to a structural color regulation and control device based on silicon nitride metasurface continuous domain bound state enhancement, which comprises a substrate and a metasurface structure arranged on the substrate, the substrate is a silicon dioxide substrate, and the metasurface structure is composed of a plurality of nano-disks which are periodically arranged in a two-dimensional manner. And a circular air hole is formed in the nano plate. Based on the narrow linewidth resonance characteristic of the quasi-BIC, the structural color with high saturation and wide color gamut is realized; by utilizing strong polarization dependence, passive and dynamic regulation and control of color brightness can be realized through simple polarization rotation, and the structure does not need to be changed; silicon nitride has extremely low loss in a visible light band, good compatibility with a silicon dioxide substrate and a stable structure; a high-contrast polarization encryption pattern is easy to realize, and the application prospect in the fields of high-end anti-counterfeiting, information storage, dynamic display and the like is wide; the adopted micro-nano processing technology is standard and mature, and practical preparation and industrialization of the device are facilitated.

The present disclosure relates to a display device that makes it possible to provide a display device in which dimming of display light is reduced by using a reflection type polarizing plate.The display device includes a display, a camera, and a reflection type polarizing plate configured to selectively transmit first polarized light having a first polarization direction and selectively reflect second polarized light having a second polarization direction different from the first polarization direction. The reflection type polarizing plate is disposed in an imaging direction of the camera so that the reflection type polarizing plate transmits one of an image of natural light including first polarized light and second polarized light and a video on the display and reflects the other of the image of natural light and the video on the display, and the camera is configured to capture the image of natural light including only one of the first polarized light and the second polarized light provided through the reflection type polarizing plate. The technology of the present disclosure can be applied to, for example, a telecommunication apparatus and the like.

A display device including a first sensor part that includes a first trunk portion, a first branch portion connected to the first trunk portion and extending in a direction different from a first direction and a second direction, a second branch portion spaced apart from the first branch portion, and a bridge connecting the first branch portion to the second branch portion. A second sensor part includes a second trunk portion extending in the second direction, and a third branch portion disposed between the first branch portion and the second branch portion.

The invention discloses a polarization sensitive type broadband absorber based on metal-medium stacking, and relates to the technical field of micro-nano photonic devices and infrared detection. The absorber sequentially comprises a bottom-layer high-loss metal reflecting layer, a multi-layer stacked composite dielectric cavity structure and a top-layer sub-wavelength metal grating from bottom to top, according to impedance matching and interference resonance theories, a broadband absorption substrate is constructed through a multi-layer film structure at the bottom, and light energy is converted into heat energy by utilizing the high loss characteristic of bottom layer metal; plasmon resonance is excited through the top metal grating, the coupling efficiency of TM polarized light is enhanced, and TE polarized light is cut off; the above structural design successfully realizes efficient broadband absorption and high polarization extinction ratio in an infrared band. The structure is simple in design, is compatible with a CMOS technology, and has excellent wide-angle stability. And meanwhile, polarization screening can be realized without an external polaroid, and miniaturization and integration of an infrared detection system are facilitated.

The invention provides a liquid crystal reflection line polaroid, a preparation method thereof and an optical system.The preparation method comprises the following steps that a substrate is placed in an evaporation cavity, and a plurality of first evaporation devices and a plurality of second evaporation devices are arranged in the evaporation cavity; preparing a photo-alignment material on the substrate to form a photo-alignment layer; evaporating a liquid crystal polymer precursor material on the substrate by adopting a plurality of first evaporation devices, and controlling the thickness of the formed liquid crystal polymer film by controlling the evaporation rate and / or the evaporation time of the plurality of first evaporation devices; evaporating an isotropic polymer precursor material on the liquid crystal polymer film by adopting a plurality of second evaporation devices, and controlling the thickness of the formed isotropic polymer film by controlling the evaporation rate and / or the evaporation time of the plurality of second evaporation devices; the preparation method is simple, and the thickness of each film layer can be accurately controlled.

The invention relates to a quaii-BIC chiral metasurface device based on refractive index modulation and a preparation method and application thereof.The chiral metasurface device comprises a plurality of sub-wavelength structure partitions which are sequentially arranged along the X axis, and every two adjacent sub-wavelength structure partitions are rotationally and symmetrically arranged relative to the Y axis; a sub-wavelength structure in the sub-wavelength structure partition comprises at least two optical dielectric layers which are stacked along the Z axis, at least one sub-wavelength structure in the sub-wavelength structure partition is obliquely arranged relative to the Y axis, and a refractive index difference exists between the at least two optical dielectric layers, so that the metasurface device realizes intrinsic chirality. The metasurface device realizes tunable strong intrinsic chirality at multiple wavelengths, and the preparation method has the advantages that the processing difficulty is low, the thickness of the optical dielectric layer is low, the thickness and the inclination angle of the optical dielectric layer do not need to be accurately controlled, the lift-off process is compatible, and high-precision large-area metasurface device preparation can be realized.

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, anda thickness of a peripheral region of the first lens can increase from a boundary of the central region.

This specification discloses a light control film and a display device to which the light control film is applied. The light control film, when applied to a display device, enables precise control of the light output angle, ensuring high transmittance, high brightness, and excellent resolution within the light output angle, and blocking unwanted light that can cause defects such as ghosts or moire. Even when applied to an OLED display, the light control film exhibits the above-mentioned performance without causing defects such as stripes that are noticeable to a viewer. This specification also discloses a display device to which the light control film is applied.

A wearable electronic device is provided. The wearable electronic device includes a light output module, a display member configured to output at least a portion of light emitted from the light output module to a first surface, and transmit light incident on a second surface opposite to the first surface, a first polarizing reflector disposed on the second surface and configured to reflect at least a portion of first leakage light, to the first surface, a polarization modulator disposed on the first polarizing reflector and configured to modulate and transmit at least a portion of a polarization component of second leakage light which has passed through the first polarizing reflector, and to transmit the modulated light and a second polarizing reflector disposed on the polarizing modulator and configured to reflect at least a portion of third leakage light, which is at least a portion of the second leaked light and has passed through the polarizing modulator, to the first surface.

The invention provides hardening liquid, a hardening film, a preparation method of the hardening film and a polaroid, and relates to the field of optical film materials. The hardening liquid is prepared from the following components in parts by weight: 10 to 60 parts of hydroxy acrylic resin, 40 to 80 parts of polyurethane modified acrylate, 5 to 40 parts of acrylate monomers, 1 to 8 parts of an initiator, 1 to 15 parts of a curing agent, 50 to 200 parts of a high-boiling-point solvent, 50 to 200 parts of a low-boiling-point solvent, 5 to 40 parts of nano particles and 0.01 to 0.2 part of a flatting agent, wherein the boiling point of the high-boiling-point solvent is 100 to 200 DEG C, and the boiling point of the low-boiling-point solvent is 60 to 90 DEG C. The high-hardness and low-warpage transparent hard coating film provided by the invention has the advantages of high pencil hardness, low warpage, excellent wear resistance, excellent adhesive force and low haze, is high in process adaptability, and has shallow MD (machine direction) stripes after rolling.

The spreadlight lens of the court lamp comprises a lens substrate applied to a lamp, a plurality of lenses are arranged on the lens substrate in a protruding mode, the two ends of each lens are the incident end and the emergent end respectively, and the emergent end is divided into a first light-transmitting body and a second light-transmitting body from top to bottom. Wherein the back face of the first light-transmitting body sinks inwards to form a light inlet cavity used for containing a light source, a reflecting groove is formed in the back face of the first light-transmitting body, a reflecting face is arranged on the side wall, close to the light inlet cavity, of the reflecting groove, and the reflecting face is used for reflecting light rays projected to the reflecting face through the light inlet cavity. The convex light-transmitting bodies are arranged on the lens, light rays emitted by a light source can enter the convex light-transmitting bodies to be refracted and diffused to be more uniform, meanwhile, the reflecting surfaces are arranged in the convex light-transmitting bodies, total reflection of the light rays entering the light-transmitting bodies can be achieved, light waste is reduced, and glare is reduced.