79results about How to "Reduce the number of reflections" patented technology

The invention provides a light diffusion agent mother material used for a light diffusion film, a preparation method and application thereof. A light diffusion agent is compounded from organic polymer cross linking microspheres with different refractive indexes and grain diameters, the light diffusion agent mother material is prepared from 100 weight parts of polyester resin, 60 to 100 weight parts of compounded light diffusion agents and 1 to 7 weight parts of diffusion resin through high-speed diffusion and fused extrusion grain cutting by a double-screw extruding machine. The invention also provides a high-transparency heat-resistance light diffusion film prepared by using the light diffusion agent mother materials as additives. The light diffusion layer of the light diffusion film is formed by mixing the light diffusion agent mother materials and polyester slices according to the mixture ratio of 40 to 60 weight percent of polyester slices and 40 to 60 weight percent of the light diffusion agent mother materials. The light diffusion film prepared by the invention has high light transmission rate, high mist degree, excellent heat resistance performance and excellent dimension stability, and is particularly suitable for being used as the light diffusion film in a back light module of a large-dimension liquid crystal display.

The invention provides a scintillation crystal array detector which can be used to increase receiving efficiency of visible light and is used for a PET-MR imaging system. The scintillation crystal array detector comprises a scintillation crystal array and an avalanche photodiode array. The avalanche photodiode array comprises a plurality of avalanche photodiode subarrays. Each avalanche photodiode subarray comprises a plurality of avalanche photodiodes. The scintillation crystal array comprises a plurality of scintillation crystals. Each scintillation crystal possesses a coupling surface which is coupled with one of the plurality of avalanche photodiode subarrays and a plurality of adjacent surfaces which are adjacent to the coupling surface. At least one adjacent surface of the plurality of adjacent surfaces in the scintillation crystals and the coupling surface form an acute angle. Reflex numbers of the visible light in the scintillation crystals can be reduced. The receiving efficiency of the visible light is increased so that image quality of the PET-MR imaging system during image reconstruction is further guaranteed.

The invention relates to a photoetching lamp optical system, which comprises a light source, an integral rod, a relay lens and a mask, and is characterized by also comprising a uniformity strengthening component. According to the photoetching lamp optical system, the uniformity strengthening component is added in an incident end of the integral rod, so that the illumination uniformity can be greatly improved under the condition that the integral rod is shorter. Simultaneously, the cost can be reduced, the size of a machine is decreased, and the difficulty in assembly is reduced.

The invention discloses a sunlight collecting and transmitting device which at least comprises a lighting device, a light conduit and a diffuser, wherein the light conduit is connected with the lighting device, the diffuser is connected with the other end of the light conduit, the lighting device is a dome type lighting cover, the top end of the lighting cover is provided with a fixed hanging end which is at least connected with a cantilever, and at least one reflective mirror is arranged on the cantilever. By regulating the angle and the position of the reflective mirror, the lighting efficiency of a system can be effectively increased, especially when sunlight shines in a small degree. A solar panel and a positioner can be arranged on a transmission shaft, and thus, the position of the reflective mirror can be changed according to an irradiation angle of the sun. By regulating the angle and the position of the reflective mirror, the lighting efficiency of the system, can be effectively increased, especially when sunlight shines in a small degree.

The invention discloses a surface coarsening LED chip and a manufacturing method thereof. A pyramidal optical microstructure is formed at the front of a substrate; an n type semiconductor layer, a luminous layer and a p type semiconductor layer are grown on the front of the etched substrate; a negative electrode weld line area is formed by etching, a negative electrode metal layer is manufactured on the negative electrode weld line area, a positive electrode metal layer is manufactured on the p type semiconductor layer; the pyramidal optical microstructure is formed at the local negative electrode weld line area among the negative electrode metal layer and the luminous layer and the p type semiconductor layer; burnishing by abrasion is carried out on the back of the substrate, then the pyramidal optical microstructure is formed on the back thereof. The pyramidal optical microstructure of the invention can reduce times of the total reflection of light and prevent part of light being absorbed by chips through the total reflection, thus facilitating the light emitted from the chips to be refracted to the outer surface of the chips at the highest speed with the greatest possibility, avoiding visible light resonance of the light inside the chips and improving light-emitting efficiency of the chips of the LED.

The invention discloses a cherenkov detector comprising a cherenkov radiator, a photoelectric diode, a reflecting film and a light shading layer. The cherenkov radiator is used for emitting cherenkov light; the photoelectric diode is coupled with one end of the cherenkov radiator; the reflecting film is plated on surfaces except the end surface where the cherenkov radiator is coupled with the photoelectric diode; the light shading layer is arranged outside the cherenkov radiator, the photoelectric diode and the reflecting film; and the lead wire of the photoelectric diode is led out of the light shading layer. Adopting the photoelectric diode as a readout device, the cherenkov detector can work more stably and reliably in the radiation imaging field; provided with the reflecting film, the photoelectric diode improves the light collection efficiency; due to the favorable light transmission performance of the cherenkov radiator, the photoelectric diode can detect more deeply along the incident direction of the rays, thereby improving the detection efficiency and improving the ultimate cherenkov signal output value; and the cherenkov detector is more applicable in the radiation imaging field due to the measures.

The present invention discloses a method for multiplexing optical signals and an optical multiplexer, relates to the field of optical communication, and is used for multiplexing at least four optical signals into one optical signal. The method provided by the present invention comprises the steps of: adjusting polarization states of two optical signals in the four optical signals to be multiplexed so as to make the polarization states of the adjusted two optical signals are respectively different from the polarization states of the other two optical signals, preferredly are mutual orthogonal; merging the one adjusted optical signal and the one unadjusted optical signal into one optical signal through polarization multiplexing; and merging the two optical signals obtained by the polarization multiplexing into one optical signal, thereby realizing multiplexing four optical signals into one optical signal. When the multiplexing in the scheme of the present invention is performed, the various optical signals are multiplexed into one optical signal based on the polarization multiplexing, the differences of optical path lengths that the various optical signals go through are little, thus distribution differences of optical power and light field energy of the various optical signals are little when the various optical signals are multiplexed together.

The invention relates to a micro-optical element for realizing semiconductor laser beam homogenization, which is composed of a plurality of microstructure monomers arranged in a joint sealing mode, wherein each microstructure monomer comprises a front surface and a back surface, the front surface of each microstructure monomer is a spherical surface; an incident surface of the micro-optical element can be formed by the continuous arrangement of the spherical front surfaces of the plurality of microstructure monomers, and an emergent surface of the micro-optical element can be formed by the continuous arrangement of the back surfaces of the plurality of microstructure monomers; the incident surface of the microstructure element can divide the reshaped semiconductor laser beam into multiplesub-beams, and each sub-beam focuses in the microstructure monomer so as to form a series of point light source images; light beams emitted from the point light source images can leave from the back surfaces of the microstructure monomers; and the divergent light emitted from the back surface of each microstructure monomer can be overlaid on the lighting surface. The micro-optical element provided by the invention has the advantages of high light utilization efficiency, good uniformity effect and low cost and can be widely applied to the field of semiconductor laser lighting, so that the laser illuminators can be better used for night monitoring in the occasions, such as public securities, banks, prisons, forests, etc.

The present invention relates to a ray detector and particularly relates to an alpha and beta ray detector with the form of the combination of a thin plastic scintillator and a photomultiplier tube. Through the structural design, external photons are avoided from entering into the detector as far as possible, the inner surface light collection efficiency of the detector is improved, and the ray transmission area of a detection window is increased. The light shielding of the detection window is mainly rely on the elastic contact of a black silicone ring with the plastic scintillator, a light shielding film, a shell side wall and a protection cover. The inner surface of a detector shell is coated with an aluminium film, thus the flashing light reflection factor is larger than 0.9, the four walls of the detector shell are designed to be slopes, the reflection times of the flashing light in the detector shell is reduced, and thus the photons can be gathered quickly. The shield grids of the detection window have two forms, one is a honeycomb hexagonal grid, the transmittance of ray vertical incidence is larger than 90%, the other one is the combination of a hexagonal grid with a stainless steel gauze, and the transmittance of the ray vertical incidence is larger than 75%. The detector has the advantages of simple structure, high maintainability and high detection efficiency.

The invention relates to a high-resolution reflection type high-speed rotating mirror interference spectrometer which comprises a first rotating mirror and a second rotating mirror, wherein the second rotating mirror is a plane mirror. The invention provides the high-resolution reflection type high-speed rotating mirror interference spectrometer which can improve the spectral resolution of a system, can simplify the structure of the system and has large view field angle.

The invention discloses a multi-channel high-density wavelength division multiplexing high-speed optical device. The optical device comprises a laser module, an optical path conversion module, a wavelength division multiplexing module, an optical fiber coupling module and an optical fiber which are sequentially arranged along the optical axis direction. The optical device is characterized in thatthe wavelength division multiplexing module comprises a first Z-Block module with four channels and a second Z-Block module with four channels; eight paths of divergent light emitted by the laser module are converted into eight paths of parallel light through the light path conversion module; and eight paths of parallel light are divided into two groups according to four paths as a group, one group of coupled light passes through a first Z-Block module and then is combined into one path, the other group of coupled light passes through a second Z-Block module and then is combined into a secondpath, and two paths of light from the first Z-Block module and the second Z-Block module pass through a wave combining module and then are combined into one path. The multi-channel high-density wavelength division multiplexing high-speed optical device can greatly shorten the optical path.

The invention discloses a light emitting diode. The light emitting diode comprises a chip layer, a fluorescent layer and a reflection cover layer. The fluorescent layer comprises a base face, a top face and a side face, wherein the base face is opposite to the top face and the side face connects the top face and the base face. The chip layer is adhered to the base face. The reflection cover layer is connected to the top face and comprises a reflection face facing the chip layer. Reflection protrusions are arranged on the reflection face. Light given out by the chip layer penetrates through the fluorescent layer, is reflected by the surfaces of the reflection protrusions and then is emitted out from the side face. The invention also discloses a backlight module and a preparation method of the light emitting diode. According to the invention, the light emitting efficiency of the light emitting diode is improved; power consumption of the light emitting diode is reduced; under the premise of providing the same backlight source brightness, the quantity of the light emitting diodes which are to be arranged on the backlight module is reduced; and product cost of the backlight module and a display device is reduced.

This invention relates to a color separation prism set with one first prism area and second prism area. The first prism area near two boundary surfaces form relative color frequency band double color filter lens and the second prism area is tightly connected to the first prism area through coating the double color filter lens. The second prism area is set to make the beam into the double color filter lens with an incidence angle less than thirty degrees and make the light path of each color in the prism after the separation prism.

The embodiment of the invention provides a combiner and relates to the technical field of fiber-optic communication. The combiner comprises a first light path adjusting element, a second light path adjusting element, a first filtering and light combining element, a second filtering and light combining element, a polarization state change element and a polarization and light combining element. By means of the light combiner, at least four paths of light can be combined into one path of light, and the reflection frequency of the light in the combining process is reduced.

The invention discloses a laser light source, which comprises a laser source, a first concentration module, a first diffusion sheet, a first focusing module, a fluorescent powder wheel, a second focusing module, a light stick, a diffusion unit and a light splitting switch element, wherein in a state I, the light splitting switch element reflects laser, used for stimulating fluorescent powder, fromthe first diffusion sheet to the second focusing module; in a state II, the light splitting switch element reflects the laser from the first diffusion sheet to the second focusing module. The invention further discloses a laser light source control method, which comprises the following steps: Step I, adjusting the light splitting switch element to the state I; Step II, outputting light emitted bythe fluorescent powder wheel, or outputting light which is emitted by the fluorescent powder wheel and filtered by a region corresponding to a filter wheel, or outputting light which passes through asecond diffusion sheet; Step III, adjusting the light splitting switch element to the state II; Step IV, outputting the light emitted by the laser source. The laser light source is simple in structure, small in size and high in optical efficiency and can be compatible with various light source schemes.

Disclosed is a tower bottom reflecting type solar focusing heat-collecting device. The device consists of heliostats, a rotary paraboloidal mirror, tapered mirrors, a cylindrical mirror, a compound paraboloidal mirror, a sunlight receiver and a heat storage heat exchanger, wherein the rotary paraboloidal mirror, the tapered mirror, the cylindrical mirror, the tapered mirror, the compound paraboloidal mirror, the sunlight receiver and the heat storage heat exchanger are arranged sequentially from tower top to tower bottom, a plurality of heliostats are used for focusing and reflecting sunlight to the tower top, the rotary paraboloidal mirror, the tapered mirrors, the cylindrical mirror and the compound paraboloidal mirror are used for re-reflecting the sunlight to the sunlight receiver at the tower bottom from the tower top, the sunlight receiver is located in the heat storage heat exchanger, the heat storage and external heat exchanging are achieved on the heat storage heat exchanger, the focusing heat collection, heat storage and external heat exchanging are conducted at the bottom of the tower, the tower bottom load is reduced, the power consumption is reduced, the heat loss is reduced, the process is simplified, the high-temperature heat storage is facilitated, and the device is suitable to solar generating and high-temperature heating application occasions.

The invention discloses a table tennis racket, a tennis racket, a badminton racket or a squash racket with a shock absorption grip. The racket comprises a batting board 1 and a grip sheet 2. The racket is characterized in that: an elastic device 3 in a stress state is arranged between the grip sheet 2 and the batting board 1. When the shock of the racket is transferred to the position of the grip after the racket strikes a ball, the elastic deformation of the elastic device 3 consumes the shock energy and damps the strength of the shock, and the elastic device does not reflect the shock and does not affect the batting shock information transferred to a hand from the outer side of the grip sheet 2 by the batting board 1 at the same time. The elastic device 3 is in the elastic stress state, so that the elastic device has higher absorption effect on the shock and plays a role in supporting the grip sheet, and the strength of the grip is not excessively reduced. The problems of poor handfeel of the racket, tennis elbow formation and the like caused by excessive shock of the racket are solved by using low cost and simple production processes.

This invention discloses one light module, which comprises one light source set and one conductive part, wherein, light source is to provide one light beam and the conductive part is set above light source set; light conductive part has relative one top surface, one light incidence surface and one first reflection surface and one light exit surface connected between top and incidence surface; top surface has one first concave with its surface of one second reflection surface for reflection light. This invention provides one surface light source device with light module.

The embodiment of the invention discloses a wavelength division multiplexer / de-multiplexer and an optical transmitter module and relates to the communication technology field. The wavelength division multiplexer / de-multiplexer is used for reducing the reflection number of light signals and improving the combination of light paths. At least four paths of light signals are multiplexed into one path of light signals by the wavelength division multiplexer / de-multiplexer, different light signals are reflected or transmitted through a light path changing element, a first filtering light combination element, a second filtering light combination element and a third filtering light combination element, so that the light signals with different wavelengths can be multiplexed into one path of light signals.

The invention provides a wavelength division multiplexer and an optical module. The wavelength division multiplexer comprises a first light guiding block and a second light guiding block, wherein the side walls of the first light guiding block form a first optical surface, a second optical surface, a third optical surface and a fourth optical surface which are sequentially connected in an encircled manner, the side walls of the second light guide block form an optical surface I, an optical surface II, an optical surface III, and an optical surface IV which are sequentially connected in an encircled manner, and the optical surface I is located on one side of the third optical surface; the first optical surface is provided with an antireflection film layer, the second optical surface is provided with a reflection film layer, the third optical surface is sequentially provided with an antireflection film layer and a half wavelength plate along the length direction, and the fourth optical surface is sequentially provided with a first thin-film smoothing film layer and a second thin-film smoothing film layer along the length direction; the optical surface I and the optical surface III are respectively provided with an antireflection film layer, the optical surface II is provided with a polarization wave combination film layer, and the optical surface IV is provided with a reflection film layer. The stability of the wavelength division multiplexer is enhanced.

The invention provides a combiner and belongs to the optical communication field. The combiner provided by the invention is used for receiving at least four paths of light with different wavelengths which are emitted by a laser; a light path adjusting component is used for adjusting the propagation directions of the first path of light and the second path of light so as to make the first path of light and the second path of light inputted into a light separation component; the light separation component is used for separating the first path of light, the second path of light, the third path of light and the fourth path of light, combining a sub light beam obtained after separating the first path of light and a sub light beam obtaining after separating the third path of light into one path of output light, and a combining a sub light beam obtained after separating the second path of light and a sub light beam obtaining after separating the fourth path of light into one path of output light; a light beam combining component is used for combining the output light of the light separation component into one path of light; and therefore, the at least four paths of light can be combined into one path of light. Compared with the prior art, the combiner can reduce the number of reflection of light in a combining light process.

A semiconductor light emitting device comprises a semiconductor light emitting element comprising a semiconductor laminate including a p-type semiconductor layer, an active layer and an n-type semiconductor layer which are sequentially laminated, and a conductive support substrate joined to the p-type semiconductor layer side of the semiconductor laminate. The semiconductor laminate is divided into at least two semiconductor regions by a trench. The semiconductor light emitting device further comprises a first transparent sealing resin covering at least a portion of the semiconductor light emitting element, the first transparent sealing resin comprising a plurality of first fluorescent particles, each of the first fluorescent particles having an individual average particle diameter. A width of the trench is smaller than an overall average of the individual average particle diameters of the first fluorescent particles.

The high-resilience and high-brightness brightness brightness enhancement film comprises a prism layer, a base material layer and a back coating structure layer, which are arranged in sequence; the prism layer comprises a first prism structure and a second prism structure, the cross section of a prism of the first prism structure is triangular, and prisms of the second prism structure are evenly arranged between prisms of the first prism structure. The upper portion of each prism of the second prism structure is provided with two upper edges, and the highest position of the first prism structure is flush with the highest positions of the upper edges. Through the design, the brightness enhancement film can rebound faster, the brightness is higher, and the preparation method is simpler and more convenient.

The invention provides a light-emitting diode and a back light module. The light-emitting diode comprises a packaging body and a light-emitting diode chip. The packaging body comprises a substrate and a U-shaped case, one end of the U-shaped case is connected with the substrate, and the other end is in a circular structure. The light-emitting diode chip is arranged in the packaging body and is separated from the inner wall of the packaging body. In the invention, the light-emitting diode chip is placed at a distance from the inner wall of the packaging body by using the U-shaped packaging body, so that the number of light reflection is reduced, the light-emitting area is increased, and thus, the overall efficiency of the light-emitting diode is increased.

The invention discloses a reflector as well as a lamp using the reflector and an installation method thereof. The reflector comprises a first reflective arc surface, a second reflective arc surface and a connecting part, wherein the first reflective arc surface and the second reflective arc surface are in mirror symmetry at the connecting part. When the reflector is installed for use, the opening direction of the reflector is arranged in the projecting direction of a double rail light source, and the connecting part of the reflector is also probed into the double rail light source and exceeds the geometric center of the double rail light source, therefore, light emitted by the light source can be emitted out from the reflector through at most only once reflection, and the optical energy use rate of a whole lamp optical system is improved.

The invention provides a scanner which comprises a light source emitter, a reflector arranged corresponding to the light source emitter, a swing assembly driving the reflector to swing and a light source receiver, and light emitted by the light source emitter is reflected by the reflector to form a scanning light beam with time difference so as to scan a bar code. The light source receiver receives light beams reflected by the bar code to read the code, and the reflector and the light source receiver are both arranged on the swing assembly and synchronously swing along with the swing assembly. Compared with the prior art, the reflecting mirror and the light source receiver are both arranged on the swing assembly, so that the reflecting mirror and the light source receiver synchronously swing along with the swing assembly, the position of the reflecting mirror and the position of the light source receiver are relatively fixed all the time, the reflection frequency is reduced, the bar code recognition rate is increased, and the structure is compact.

A fabrication method of a carbon nanotube shading cover comprises the following steps of (1) determining a stray light ratio elimination index of the shading cover; (2) determining the position and the size of a baffle plate inside the shading cover; (3) modeling the size, the shape and the surface diffuse reflection characteristic inside the shading cover to obtain a light ratio elimination simulation calculation result, comparing the light ratio elimination simulation calculation result with the index, and entering the next step if the requirement is met; (4) designing the shading cover and a baffle plate structure inside the shading cover which can be fixedly arranged and can stand an emission mechanical environment; (5) carrying out modal analysis on the emission mechanical environment of the designed shading cover to obtain the shading cover conforming to the mechanical performance required by emission; (6) mechanically processing the shading cover by using titanium alloy; (7) determining a growth process parameter of a carbon nanotube; and (8) growing a carbon nanotube coating layer on the inner wall of the shading cover obtained through mechanical processing, and completing fabrication. With the method disclosed by the invention, the problems of inadequate stray light elimination capability, relatively large size and relatively heavy weight of a black paint elimination shading cover can be solved.