6384results about "Polarising elements" patented technology

Collapses of pillars are suppressed. An optical detecting device includes a pixel array section having multiple pixels that are arranged two-dimensionally therein. Further, each pixel of the multiple pixels includes a photoelectric converting section provided on a semiconductor layer and a metasurface structure that is arranged on a light incidence surface side of the semiconductor layer and that guides incident light to the photoelectric converting section. Moreover, the metasurface structure includes multiple pillars that are arranged at distances therebetween which are shorter than a wavelength of the incident light and a transparent support that connects and supports at least some of the multiple pillars.

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.

An eyepiece includes a planar waveguide having a front surface and a back surface. The eyepiece also includes a grating coupled to the back surface of the planar waveguide and configured to diffract a first portion of the light propagating in the planar waveguide out of a plane of the planar waveguide toward a first direction and to diffract a second portion of the light propagating in the planar waveguide out of the plane of the planar waveguide toward a second direction opposite to the first direction and a wavelength-selective reflector coupled to the front surface of the planar waveguide. The wavelength-selective reflector comprises a multilevel metasurface comprising a plurality of spaced apart protrusions having a pitch and formed of a first optically transmissive material and a second optically transmissive material disposed between the spaced apart protrusions.

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 present disclosure provides an optical component, which may be a metasurface grating, including (a) a substrate; and (b) an array of subwavelength-spaced phase-shifting elements, which are tessellated on the substrate to produce, when illuminated with a polarized incident light, a diffracted light beam with a distinct polarization state for each of a finite number of diffraction orders, wherein the finite number is 2 or more.

It is attempted to acquire appropriate images in a case where multiple types of images are generated on the basis of an output of a light reception sensor. A signal processing device according to the present technology includes a signal processing section that performs signal processing on at least one image in multiple types of images generated on a basis of an output of a light reception sensor in which pixels having light receiving elements are arrayed two-dimensionally, and a control section that controls a signal processing parameter in the signal processing section such that modes of the multiple types of images become appropriate.

According to examples, an optical lens assembly for head-mount display (HMD) devices may include an optical lens configuration with a first optical element and a second optical element. The first optical element and the second optical element may be affixed together along a peripheral edge to form a gap between the two optical elements and may compensate chromatic dispersion characteristics. The optical lens configuration may also include a reflective polarizer layer, a quarter wave layer, and a semi-transparent mirror provided on selected surfaces of the optical elements. In some examples, the gap may be filled with air or an inert gas.

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 composite optical film with a polarization function, a preparation method and application thereof. The composite optical film comprises a transparent substrate layer, and a buffer layer, an oriented calcite crystal layer and an anti-reflection layer which are laminated on one side of the transparent substrate layer. Wherein the oriented calcite crystal layer is obtained by coating a superparamagnetic modified calcite crystal composite material suspension on the surface of the buffer layer, inducing optical axis oriented arrangement through a magnetic field and performing UV curing; the buffer layer is obtained by co-extruding a cycloolefin polymer and a polyurethane acrylate mixture, and a thermal expansion coefficient transition system is formed; the anti-reflection layer is composed of nano-porous titanium dioxide with the refractive index changing from 1.8 to 2.3 in a gradient mode, and a refractive index gradient structure is formed. According to the composite optical film, the polarization efficiency and the light transmittance of the composite optical film are improved and the industrial stability is improved through the design of the polarization functional layer in which the calcite nanocrystals are directionally arranged under the induction of a magnetic field and in combination with the gradient refractive index scattering layer.

The present invention provides a polyvinyl alcohol film which satisfies formula (1) and formula (2).　(1): 1.50075 ≤ Nx ≤ 1.50105 (2): 9.0 ≤ (Nx - Nz) / (Nx - Ny) ≤ 20.0 In the formulae, Nx represents the refractive index in the length direction (MD direction) of the film, Ny represents the refractive index in the width direction (TD direction) of the film, and Nz represents the refractive index in the film thickness direction of the film.　As a result, there is provided a polyvinyl alcohol film which has excellent stretchability while maintaining a high degree of polarization when formed into a polarizing film.

To provide a wire grid polarization element which is excellent in heat resistance.SOLUTION: A wire grid polarization element 1 includes: a substrate 10 composed of an inorganic material; a grid structure 20 that is composed of an organic material, in which a base part 21 and a plurality of protrusion parts 22 provided on the substrate 10 are integrally formed; and a resin film 30 which is composed of a metal material, and coats a part of the protrusion parts 22. The organic material is a cured product of photocurable acrylic resin for imprint containing a photopolymerization component, the photopolymerization component contains a resin (A) and a resin (B), the resin (A) is a monofunctional acrylate monomer having one or both of a phenyl group and a benzyl group, the resin (B) is a bifunctional compound, a percentage content of the resin (A) to the total photopolymerization component is 20 mass% or more and 42 mass% or less, and a percentage content of the resin (B) to the total photopolymerization component is 43 mass% or more and 66 mass% or less.SELECTED DRAWING: Figure 1

To provide: an adhesive composition which has excellent low viscosity when adjusted to a predetermined non-volatile content, and which, when used in an adhesive sheet, exhibits excellent releasability and is less likely to cause lifting or peeling from an adherend even after exposure to a high-temperature environment or a high-temperature and high-humidity environment; and an adhesive sheet employing the same.SOLUTION: An adhesive composition comprises an acrylic polymer (A) and a curing agent (B). The acrylic polymer (A) is a copolymer of a monomer mixture containing respective specific amounts of specific monomers (a1) and (a2). The amount of the curing agent (B) added is 0.01-5 pts.mass based on 100 pts.mass of the acrylic polymer (A). The gel fraction of an adhesive layer composed of the adhesive composition is 55-90%.SELECTED DRAWING: Figure 1

Provided is a light detection device that suppresses light interference. The light detection device includes: a semiconductor layer having a photoelectric conversion unit; a first insulating film layered on a light incidence surface side of the semiconductor layer; an optical element having a metal film layered on the first insulating film and an opening array formed in a region, of the metal film, that overlaps with the photoelectric conversion unit in plan view, the optical element being capable of selecting a specific light; a second insulating film layered on the optical element; and a third insulating film layered on the second insulating film. One of a surface of the metal film on the second insulating film side thereof or a surface of the second insulating film on the third insulating film side thereof has unevenness that is greater than unevenness in a surface of the metal film on the first insulating film side thereof or a surface of the first insulating film on the semiconductor layer side thereof.

The invention provides a metasurface structure design method and a metasurface structure, and the method can comprise the steps: initializing a rotation angle of the metasurface structure; a first light field construction step: constructing a transmission light relation of the current metasurface structure based on the rotation angle; a second light field construction step: constructing a diffracted light relationship of the current metasurface structure based on the transmitted light relationship so as to determine the light intensity distribution of the image plane; an error construction step: calculating an iteration constraint value according to the image plane light intensity distribution and the target light intensity; wherein the target light intensity is a preposed parameter, the target light intensity is the light intensity corresponding to the target metasurface structure, and the target metasurface structure is a design target; if it is judged that the iteration constraint value is larger than the set value, the rotation angle is updated, the updated rotation angle is obtained, the first light field construction step, the second light field construction step and the error construction step are repeatedly executed till the iteration constraint value is not larger than the set value, and the target metasurface structure is determined based on the current rotation angle.

The invention relates to a polarization spectrometer, in particular to a pitch-adjustable polarization spectrometer based on cholesteric cellulose chiral liquid crystal. The polarization spectrometer is prepared by adopting the following method: step 1, regulating and controlling the screw pitch of cholesteric cellulose chiral liquid crystal; step 2, preparing a flexible PDMS film; step 3, preparing a patterned PDMS through hole film; 4, treating the surface of the glass sheet; step 5, filling cholesteric cellulose chiral liquid crystals; and step 6, orienting the cholesteric cellulose chiral liquid crystal to obtain the pitch-adjustable polarization spectrometer with the film-shaped patterned cholesteric cellulose chiral liquid crystal. The problems that a traditional small-molecule liquid crystal chiral agent is difficult to regulate and control the screw pitch of the cholesteric phase cellulose chiral liquid crystal and easy to agglomerate can be solved, and simple preparation of the screw pitch-adjustable cholesteric phase cellulose chiral liquid crystal is achieved; and meanwhile, transmission of right-handed circularly polarized light and selective reflection of left-handed circularly polarized light are realized by utilizing the patterned cholesteric cellulose chiral liquid crystal.

To improve optical characteristics by inhibiting protrusions of a grid structure from being inclined due to deposition of a functional film.SOLUTION: A wire grid polarization element 1 comprises: a substrate 10; a grid structure 20 obtained by integrally forming a base part 21 and a plurality of protrusions 22; a functional film 30 covering a part of the protrusion 22; and a reinforced film 51. The reinforced film 51 includes inorganic oxide, is interposed between the part of the protrusion 33 covered by the functional film 30 and the functional film 30 to reinforce the protrusion 22. The reinforced film 51 covers and envelopes at least a tip 22a and an upper side of both side faces 22b of the protrusion 22. The functional film 30 covers and envelopes a top of the protrusion 22 via the reinforced film 51 while does not cover a bottom side of the protrusion 22 and the base part 21, and has a coverage factor (Rc) of 30% or more and 70% or less.SELECTED DRAWING: Figure 25

The present application discloses films comprising regioselectively substituted cellulose esters and a component A wherein rings A, B, C, R1, R2, R5, R6, R8, m, n, and k are defined herein. The films are C+ films that exhibit improved wavelength dispersion. <

The invention discloses a mirror symmetry correlation receiving radiation metasurface and a polarization and complex amplitude regulation and control method thereof. The polarization state of the receiving and radiating end of the metasurface and the complex amplitude regulation and control method from any polarized wave to any polarized wave are regulated and controlled by controlling the in-plane mirror symmetry of the receiving and radiating metasurface patch structure. The polarization and complex amplitude regulation and control method is realized by a receiving and radiating metasurface, the metasurface structure is composed of five layers of metal and four layers of dielectric substrates, and the total thickness is about 0.086 lambda. Wherein the first-layer structure and the fifth-layer structure consist of circular rings with two pairs of arc-shaped grooves etched at the edges and C-shaped grooves etched at the centers; the relative rotation angle of the C-shaped groove and the arc-shaped groove is changed to control the elliptical angle of electromagnetic waves, the overall rotation angle of the C-shaped groove and the arc-shaped groove controls the polarization angle of the electromagnetic waves, and the opening size of the C-shaped groove is used for regulating the transmission amplitude; the transmission phase is regulated by changing the length of the third-layer transmission line; meanwhile, the four layers of dielectric plates are used for isolating radiation and receiving modes. The metasurface and the method have the ultra-thin characteristic and the ultra-high pixel resolution.

The invention provides a metasurface based on spin decoupling and a preparation method thereof. The metasurface comprises a substrate layer and a plurality of rectangular nano columns located on the substrate layer. Wherein the lengths, the widths and the rotation angles of the rectangular nano-columns are different, and the rectangular nano-columns have high transmittance and [0, 2pi] all-phase coverage and meet the conditions of a half-wave plate; the plurality of rectangular nanorods regulate and control the left-handed circularly polarized light and the right-handed circularly polarized light through a preset phase, so that a preset function is realized; the preset phase comprises a propagation phase and a geometric phase. According to the metasurface provided by the invention, the substrate layer and the rectangular nanorod array with various sizes and different rotation angles are fused, so that accurate and independent phase regulation and control on the circular polarization state of incident light are realized, and the constraint of mutual interference of spinning states in a traditional optical element is thoroughly eliminated; different circularly polarized light signals can be distinguished and independently processed under a single wavelength, and the optical regulation degree of freedom is shown.

Provided are an optical element capable of more easily detecting a change in refractive index of an object to be measured without sweeping a wavelength of incidence light, and an optical sensor using the optical element. An optical element includes a liquid crystal layer that is formed of a composition including a liquid crystal compound, in which the liquid crystal layer has a liquid crystal alignment pattern in which an orientation of an optical axis derived from the liquid crystal compound changes while continuously rotating toward at least one direction of in-plane directions, in a case where a length over which the orientation of the optical axis derived from the liquid crystal compound rotates by 180° in a plane is set as a single period, a length of the single period in the liquid crystal alignment pattern gradually changes in the one direction, and the liquid crystal layer has a resonance structure.

The present application discloses a head-up display glass and a head-up display system. The head-up display glass includes laminated glass and a reflective film layer; the laminated glass includes an outer glass plate, a polymer interlayer, and an inner glass plate; the reflective film layer includes an inner barrier layer, an improvement layer, and at least one laminated structure arranged in a stacked manner. The inner barrier layer can block the damage of alkali metal ions on the glass surface to the improvement layer during the heat treatment process and block the oxidation of the improvement layer caused by the diffusion of oxygen. The improvement layer can further improve the reflectivity of the reflective film layer to P-polarized light while maintaining a low reflectivity of the reflective film layer to visible light, so that when the driver inside the vehicle visually observes the reflective image of the head-up display glass, only the reflective image of the reflective film layer can be observed, thus eliminating the visual ghosting phenomenon; moreover, the reflectivity of the head-up display glass in the present application to visible light is less than or equal to 15%, and no obvious reflection phenomenon can be observed inside the vehicle.

A polarization splitting device includes a substrate, and a polarization splitting layer having a structure element pattern including a plurality of structure elements each having two-fold rotational symmetry, and formed on an upper surface of the substrate. The polarization splitting layer splits first to sixth polarization components included in object light, and focuses respectively at first to sixth focal positions on a focal plane. The structure element pattern includes a first structure element pattern for focusing the first and second polarization components, a second structure element pattern for focusing the third and fourth polarization components, and a third structure element pattern for focusing the fifth and sixth polarization components, and a pattern constituted by a first structure element, a second structure element, and a third structure element is set as a unit pattern, and a plurality of unit patterns are two-dimensionally arranged.

The invention relates to a polarization optical device which comprises a substrate, silicon columns with different sizes are periodically arranged on the substrate, and each silicon column applies different phase shifts to incident light components with different wavelengths and different polarization state angles in incident light according to the size of the silicon column. Therefore, the incident light components with different wavelengths and different polarization state angles are converged at different focuses. According to the invention, the independent phase regulation and control and achromatic principle are utilized, the function of the broadband polarizing lens is realized, and the miniaturization of a polarization optical device is facilitated.

The invention provides primer coating liquid, a PMMA (polymethyl methacrylate) film as well as a preparation method and application of the PMMA film. The primer coating liquid comprises the following components in parts by weight: 2-6 parts of waterborne polyurethane resin; 1 to 5 parts of hydrophobic polyurethane resin; 2-8 parts of a cross-linking agent; 0.5 to 2 parts of a compatilizer; 0.1 to 0.5 part of a dispersant; 1-6 parts of silicon dioxide particles; and 100 to 120 parts of water. The waterborne polyurethane resin and the hydrophobic polyurethane resin are matched, so that the base film is endowed with more excellent water resistance and chemical stability, the service life of the base film is effectively prolonged, and the overall durability and reliability of the base film are improved; the coating liquid shows excellent dispersity, and is beneficial to improving the transmittance of a base film, so that the light transmission is more efficient.

An anamorphic directional illumination device may provide a near-eye display apparatus or a vehicle external light device. The anamorphic near-eye display apparatus comprises a spatial light modulator with asymmetric pixels; an input transverse anamorphic lens; and an extraction waveguide that passes input light in a first direction between a polarization-sensitive reflector and front guide surface to a lateral anamorphic reflector, and to reflect the light back through the extraction waveguide to guide between the rear guide surface and front guide surface. Reflective extraction features are arranged to extract the reflected light towards the pupil of a viewer, maintaining the directionality of the fan of light rays from the spatial light modulator and anamorphic imaging system. A thin, transparent and efficient anamorphic display apparatus for Augmented Reality and Virtual Reality displays and for scene illumination is provided.

Snapshot phase-shifting diffraction modules and associated systems and methods are described that enable high spatial and temporal resolution phase imaging with high immunity to environmental factors such as vibrations and temperature changes. One example optical diffraction phase module includes a polarization grating to produce two circularly polarized light beams with opposite polarizations, a first lens to receive the two circularly polarized beams, and a spatial filter positioned at a focal plane of the first lens. The spatial filter includes two openings, one to spatially filter one of the two circularly polarized light beams, and another opening to allow another circularly polarized light beam to pass. The module also includes a second lens to focus the received light onto an image plane and to enable a phase measurement based a plurality of interferograms. The phase module can be incorporated into a microscope system that operates a reflection or a transmission mode.

The utility model relates to a polarizer structure and a display for improving high-temperature reddening, wherein the polarizer structure for improving high-temperature reddening includes a polarizer body and a water absorption structure; a receiving recess is provided on the side of the polarizer body facing the screen; the receiving recess is provided at intervals or continuously along the edge of the polarizer body; the water absorption structure is provided in the receiving recess for absorbing water vapor. The utility model mainly provides a polarizer structure for improving high-temperature reddening, based on providing a receiving recess for accommodating the water absorption structure in the polarizer body, and using the water absorption structure to absorb water vapor, which can effectively avoid the problem of reddening failure at high temperature when water vapor enters between the polarizer body and the glass substrate; and based on providing the water absorption structure in the receiving recess, the problem of water vapor leaking between the polarizer body and the glass substrate can be avoided, and water vapor is further prevented from entering between the polarizer body and the glass substrate, thereby ensuring the normal operation of the polarizer.

According to the present invention, provided are an optical laminate which has excellent adhesiveness between two optically anisotropic layers, and in which an A plate or a layer obtained by fixing a twist-aligned liquid crystal phase, which is as an optically anisotropic layer, has excellent liquid crystal alignment properties, a polarizing plate, and an image display device. An optical laminate of the present invention has: a first optically anisotropic layer formed of a first liquid crystal compound; a second optically anisotropic layer formed of a second liquid crystal compound; and a mixed layer which is disposed between the first optically anisotropic layer and the second optically anisotropic layer and contains a component derived from the first liquid crystal compound and a component derived from the second liquid crystal compound, the first optically anisotropic layer is a C plate, the second optically anisotropic layer is an A plate or a layer obtained by fixing a twist-aligned liquid crystal phase, the mixed layer further contains a photo-alignment compound, and in an analysis of components of the optical laminate in a depth direction by time-of-flight secondary ion mass spectrometry with ion beam irradiation from a surface of the optical laminate on a first optically anisotropic layer side toward a second optically anisotropic layer side, predetermined requirements are satisfied.

An optical system and a display device, the optical system comprising: a lens assembly comprising at least two lenses, the at least two lenses comprising a first surface, a second surface, a third surface and a fourth surface arranged in sequence along an optical axis direction of the lens assembly; the transflective film is arranged on the side, away from the third surface, of the fourth surface; the polarization reflection layer is arranged on the side, away from the fourth surface, of the third surface; the phase delay film is located on the side, away from the transflective film, of the fourth surface; the adhesive layer comprises an adhesive layer lens; wherein at least one of the first surface and the second surface is a Fresnel surface, and the glue layer is glued between the second surface and the third surface. The glue layer glued between the second surface and the third surface comprises the glue layer lens, light rays are refracted through the glue layer lens and the Fresnel surface, chromatic aberration can be corrected, the light rays do not pass through the Fresnel surface in the returning process, and stray light is reduced.

A visual optical system comprises a first optical system and a second optical system. The first optical system comprises a first lens having a positive refractive power, a reflective polarizing element, a quarter-wave plate, a second lens having a refractive power and a third lens having a positive refractive power. The second optical system comprises, sequentially along a second optical axis from the first side to the second side, first to sixth lens elements. An effective focal length f3′ of the third lens, a distance TD′ from a first-side surface of the first lens to a second-side surface of the third lens on the first optical axis, an effective focal length f1 of the first lens element and a distance TD from a first-side surface of the first lens element to a second-side surface of the sixth lens element on the second optical axis satisfy: 1.9<(f3′ / TD′) / (|f1| / TD)<5.7.