45 results about "Trigonal prism" patented technology

The present invention provides a LCD panel with an isosceles triangular cross-section having a base angle of 50 to 55 degrees, and an incident angle equal to 10 to 24 degrees. Several triangular prisms are installed downwardly on a prism sheet by using the base angle as a vertex angle for controlling the light to be travel in a parallel direction, and incident in a direction perpendicular to an oblique surface of a smaller surface of the prism. The oblique surface of a larger surface of the prism reflects the incident light completely and projects the light perpendicular to the bottom of the prism. An optical system provides a backlight for a liquid crystal display apparatus and an anisotropic diffuser installed at an orthogonal direction of a prism has a diffusion function such that the light can be diffused by the LCD panel and the two orthogonally installed polarizers.

The invention discloses liquid level measuring method and device based on an isosceles right triangular prism. Liquid level measurement is realized by utilizing the principles of refraction, reflection, total reflection, and the like of a light beam in an isosceles right triangular prism and extracting the liquid level characteristic information in linear array CCD image data. The measuring device mainly comprises a line light source, the isosceles right triangular prism, a linear array CCD, a control circuit, and the like, wherein the isosceles right triangular prism is placed into a container; the parallel light emitted by the line light source is projected into the triangular prism perpendicular to the side surface that a right-angle side of a cross section of the triangular prism is located, and is intersected with the side surface that the inclined side is located. The method is an optical liquid level measuring method without an optical imaging lens and has the advantages of less influence on precision by change of liquid concentration, relatively simple structure, operation in corrosive hostile industrial environments, and the like.

The invention belongs to an optical splitter in the field of solar batteries and relates to a biconical dispersion prism for a focus monochromatic solar battery system. The biconical dispersion prism comprises n identical triangular prisms, wherein the outer surface of each triangular prism consists of a rectangular bottom surface, two isosceles triangle end faces and two trapezoidal side faces, the two triangular end faces are polished surfaces, and an included angle between the two trapezoidal side faces is 1 / n of 360 degrees; the adjacent trapezoidal side faces of the adjacent triangular prisms are spliced together; and one of the two similar conical surfaces formed by splicing the triangular end faces serves as an incidence end face and the other one serves as an exit end face. The biconical dispersion prism of the invention can effectively reduce the volume of the dispersion prism and compress the splitting area, thereby reducing the production cost, improving the efficiency. The biconical dispersion prism is easy to machine and is suitable for large-scale production.

A backlight assembly includes a receiving container having a receiving space, a flat-type light source, an optical member, and an inverter. The flat-type light source has a plurality of light emitting spaces spaced apart from each other and is received into the receiving space. The optical member has a prism pattern formed in areas corresponding to areas between adjacent light emitting spaces and disposed at a light emitting direction of the flat-type light source. The inverter generates a voltage for the flat-type light source. The prism pattern 1o includes prisms having a substantially trigonal prism and continuously connected one after another. Thus, the backlight assembly may improve brightness uniformity thereof and have a reduced thickness.

The cross dichroic prism according to the present disclosure includes four prisms and two dichroic mirrors. Each of the four prisms has a triangle-prism shape. The four prisms are arranged to form a quadrangular prism as a whole in a manner such that the ridge line portions are located close to each other, a first plane of one prism faces a second plane of another prism, and a third plane faces outward. Each of the two dichroic mirrors is constituted of a dielectric multilayer film provided between the first plane of one prism and the second plane of another prism. The outermost layer of a dielectric layer constituting the dielectric multilayer film is provided in contact with each of the first plane of the one prism and the second plane of the other prism.

Provided is an augmented reality (AR) device based on a waveguide with a holographic diffractive grating structure and an apparatus for recording the holographic diffractive grating structure. The apparatus includes a light source, a beam splitter, a first amplitude filter and a first triangular prism that are arranged on a path of a first light beam, and a second amplitude filter and a second triangular prism that are arranged on a path of a second light beam, in which a first part of the first light beam passes through the first triangular prism without attenuation, a second part of the first light beam passes through the first triangular prism after being attenuated, and the second light beam passes through the second triangular prism after being attenuated, and the holographic diffractive grating structure is recorded between the first triangular prism and the second triangular prism.

An optical sheet includes a base film, a plurality of prism patterns and a plurality of first embossing patterns. The prism patterns are formed on an upper surface of the base film. Each of the prism patterns has the shape of a trigonal prism and includes a first inclined surface and a second inclined surface. The first and second inclined surfaces are inclined with respect to the upper surface of the base film and meet each other at a peak portion. First embossing patterns are formed at the peak portion.

The invention discloses a multi-light source detection device and method. The multi-light source detection device comprises a hollow fixed seat, wherein the fixed seat is provided with a detection cell. The multi-light source detection device is characterized in that the fixed seat is also provided with a light detector, a rotatable prism, and a plurality of light sources; light emitted by one light source is refracted by the prism, passes through the detection cell, and then is received by the light detector. With the multi-light source detection device, light rays emitted by the light sources at different positions are refracted by the prism, then are allowed to respectively pass through the detection cell from a same position and a same straight line through rotation of the prism, and finally irradiate onto the light detector. The prism is a triangular prism, and the central axis of a mounting seat is coincident with the central line of the light detector and is vertical to a central symmetrical plane of the prism. The multi-light source detection device has the advantage of less reagent consumption, moreover, can realize multi-parameter detection, and achieves multi-parameter detection with a single instrument.

The invention discloses a method and system for narrowing and expanding laser line width. The system includes a beam expanding device and a grating. The beam expanding device is used for one-dimensional beam expanding of the laser, and the grating is used for selecting the center wavelength of the laser. , so as to achieve line width narrowing. The beam expander is composed of a single prism or a prism group, and the single prism and the prisms forming the prism group are all isosceles right-angled triangular prisms. The invention has the advantages of simple structure, high processing precision, and little influence on the beam transmission wavefront. By selecting the incident angle of the prism and the number of prism group elements, different laser beam expansion magnifications can be realized, and the required narrow-band laser linewidth can be obtained. .

The invention discloses a system for enhancing the brightness of a projection picture, which comprises a reflection module and an illumination module. The reflection module comprises a first triangular prism, a second triangular prism and a relay lens, and the illumination module comprises a first illumination module and a second illumination module; the first emergent light of the first lighting module is perpendicular to the second emergent light of the second lighting module; the relay lens is arranged on a light path of the first emergent light and is located between the first triangular prism and the second triangular prism; the first triangular prism is located between the first illumination module and the relay lens, and any right-angle side of the first triangular prism is parallel to the first emergent light; the second triangular prism is arranged at the intersection of the first emergent light and the second emergent light, so that the second emergent light is consistent with the first emergent light in direction after being reflected by the bevel edge of the second triangular prism, the two illumination modules are converged into the same beam of light through structural reflection of the triangular prism, and the projection display brightness is improved.

The invention discloses an acceleration detection method based on a micro-optical fiber composite structure, which includes: fasteners, a housing, a sealing ring, a plastic sealant, a light source, an optical detector, a micro-fiber cone, an optical fiber microsphere, a triangular prism, a support frame, Support frame, refractive index matching fluid. The light source emits a 1520-1580nm near-infrared broad-spectrum optical signal, which passes through a triangular prism coated with a semi-transparent and semi-reflective film on the bottom surface and enters the micro-fiber cone. The end face of the micro-fiber cone and the surface of the fiber microsphere form an F-P interference cavity. Part of the optical signal is directly reflected back at the exit end of the micro-fiber cone, and the other part is emitted to the surface of the fiber microsphere and is reflected back into the microsphere. The optical fiber cone interferes with the directly reflected optical signal, and is received by the optical detector after being reflected by the triangular prism. When the acceleration changes, the optical fiber microsphere can be deviated from the axial center of the structure, and the cavity length of the F‑P interference cavity can be changed. Interfering optical signals can obtain the variation of the equivalent length of the F-P interference cavity, and then obtain the magnitude of the acceleration. The invention adopts the micro-fiber taper to generate an optical evanescent field, and at the same time, the evanescent field is extremely sensitive to changes in external environmental parameters, thereby effectively improving the measurement sensitivity of the F-P interferometer.