40results about How to "Small wavelength dependence" patented technology

Disclosed is a light-reflective anisotropic electroconductive adhesive agent which is intended to be used for the anisotropic electroconductive connection of a light-emitting element to a wiring board. The light-reflective anisotropic electroconductive adhesive agent comprises a heat-curable resin composition, electroconductive particles, and light-reflective insulating particles. The light-reflective insulating particles are at least one type of inorganic particles selected from the group consisting of titanium oxide particles, boron nitride particles, zinc oxide particles and aluminum oxide particles, or resin-coated metal particles each of which is produced by coating the surface of a scale-like or spherical metal particle with an insulating resin.

To provide a diffraction element having no wavelength dependency without using a special liquid crystal. In the diffraction element 1 for diffracting incident light, a plurality of first and second phase difference regions 10 and 20 for diffracting incident light are alternately arranged to form a diffraction pattern on a transparent substrate 30. A plurality of fine projecting and recessed structures are arranged in the first and the second phase difference regions 10 and 20 in nano order at a pitch interval shorter than the shortest wavelength of a plurality of wavelength regions for making phase differences of a plurality of wavelengths of incident light even. The fine projecting and recessed structures of the first phase difference region 10 and the fine projecting and recessed structures of the second phase difference region 20 are orthogonal to each other. Phase differences are made even by the fine projecting and recessed structures in the nano order and a diffraction function having diffraction efficiency nearly free from wavelength dependency can be exhibited by the diffraction pattern.

Provided is a light branching optical waveguide including: at least one incident light waveguide (A) optically connected to one end of a multi-mode optical waveguide; and output light waveguides (B) larger in number than the incident light waveguide (A) optically connected to the other end thereof, the light branching optical waveguide being characterized in that: an intensity distribution of light incident from at least one optical waveguide (a) out of the incident light waveguide (A) on the multi-mode optical waveguide at a connecting surface of the incident light waveguide (A) and the multi-mode optical waveguide is asymmetric with respect to a geometrical central axis of the optical waveguide (a); and an extended line of the geometrical center axis of the optical waveguide (a) does not coincide with a geometrical central axis of the multi-mode optical waveguide. Accordingly, it is possible to obtain a low-loss light branching optical waveguide having a reduced branch loss and a reduced variation in branching ratio, and further to obtain a light branching optical waveguide having small wavelength dependence as well as a reduced branch loss and a reduced variation in branching ratio.

Since a polymerizable liquid crystal compound represented by the general formula (1) produces polymers exhibiting high optical anisotropy and high chemical resistance, and the optical anisotropy thereof exhibits low wavelength dependence, polymers obtained from a polymerizable liquid crystal composition comprising said polymerizable liquid crystal compound are useable as an optically anisotropic film for polarizers, wave plates, and the like, and are particularly best used in pattern formation that uses photolithography. (n represents an integer in the range of 3 to 10, m represents an integer in the range of 0 to 5, and q represents an integer in the range of 1 to 2.)

A transparent conductive element comprises: an optical layer wherein a wavefront is disposed, further comprising an average wavelength less than or equal to the wavelengths of visible light; and a transparent conductive layer which is formed upon the wavefront to follow the wavefront. With the average wavelength of the wavefront designated [lambda]m, and the average amplitude of the oscillation of the wavefront designated Am, the ratio (Am / [lambda]m) is greater than or equal to 0.2 and less than or equal to 1.0, the average wavelength of the wavefront [lambda]m is greater than or equal to 140 nm and less than or equal to 300 nm, the film thickness of the transparent conductive layer in the location where the wavefront is highest is 100 nm or less, the area of the flat part of the wavefront is 50% or less, and the reflected hue in the chromaticity scheme L*a*b* on the wavefront side is |a*| <= 10 and |b*| <= 10.

Provided is a light-reflective anisotropic conductive adhesive for use for an anisotropic conductive connection between a light-emitting device and a circuit board, which comprises a thermosetting resin composition, conductive particles and light-reflective insulating particles. The thermosetting resin composition comprises diglycidyl isocyanuryl modified polysiloxane represented by formula (1) and a curing agent for an epoxy resin.

An optical element, an optical device, and a display device are disclosed that are able to change a polarization state in time order and to produce polarized light with little wavelength dependence and superior in polarization purity, and able to perform pixel shift easily and accurately to realize high resolution image display. The optical element has a translucent surface parallel to the rotational axis of the optical element, and at least a portion of the translucent surface is formed from an optically anisotropic medium. A polarization state of a light beam transmitting through the translucent surface is switched in time order along with rotation of the optical element.

A fumaric acid diester based resin containing a dipropyl fumarate residue unit and a fumaric acid diester residue unit having a C1 or C2 alkyl group, wherein in a retardation film composed of the resin, when a refractive index in the fast axis direction within the film plane is designated as nx, a refractive index in the film in-plane direction orthogonal thereto is designated as ny, and a refractive index in the thickness direction of the film is designated as nz, the respective refractive indices are satisfied with a relationship of (nx≦ny<nz) and a relationship between a film thickness and an out-of-plane retardation measured at a wavelength of 550 nm and expressed by the specific equation is 4.5 nm / film thickness (μm) or more in terms of an absolute value.

The invention relates to a light-scattering layer used for forming an organic EL device. The light-scattering layer comprises an adhesive composition containing at least one resin (A) and resin compositions for a light-scattering layer of light-scattering particles (B). In a first resin composition for the light-scattering layer, an average particle diameter of the light-scattering particles (B) is above 200nm and below 500nm, and particles having a particle diameter above 600nm accounts for 20 volume% of the total amount of the light-scattering particles (B), and a refraction difference between the adhesive composition and the light-scattering particles (B) is above 0.1. In a second resin composition for the light-scattering layer, the resin (A) has double bonds and / or a cross-linking group, and has a mass average molecular weight (Mw) above 5,000 and less than 20,000; the light-scattering particles (B) has an average particle diameter above 200nm and below 1.0[miu]m in the resin compositions for the light-scattering layer; and a refraction difference between the adhesive composition and the light-scattering particles (B) is above 0.1.

A waveguide type adjustable polarizer belongs to the technical field of integrated photonic devices. The waveguide-type adjustable analyzer adopts organic polymer materials and liquid crystal materials with large birefringence difference, so that different polarization optical signals have different leakage losses during waveguide transmission, thereby completing the polarization analysis of TE wave optical signals. By applying a regulating voltage to the electrodes, the electro-optic effect is used to regulate the crystal axis orientation of the liquid crystal, thereby realizing the polarization analysis of the TM wave optical signal. The device can realize online polarization detection for different polarized light signals, and has many advantages such as simple structure, easy design and manufacture, low wavelength dependence, and easy regulation, and has broad application prospects in integrated photonic systems.