30results about How to "Increase the total reflection angle" patented technology

The invention relates to an LED encapsulation structure, which comprises an LED chip, a cup body for housing the LED chip, an LED encapsulation body and a supporter which extends out of the encapsulation body and is electrically connected with the LED chip. The encapsulation body comprises a multi-layer silica gel, the index of refraction of which is reduced layer by layer from the inside out accordingly to the LED chip. The invention also relates to a molding method of the LED encapsulation structure. The LED encapsulation structure adopts the multi-layer silica gel with the index of refraction reduced layer by layer, which not only provides better heat dissipation, but also avoids the single index of refraction of the encapsulation material, thus increasing the angle of total reflection of an LED lens, improving the utility rate of luminous energy and acquiring the extremely high external quantum efficiency.

The present invention teaches the use of a blind spot exposure system comprised of two consecutive reflective mirror surfaces. The first mirror surface is formed of an electrochromatic polymer while the second reflective surface is composed of conventional reflective mirror glass. The two surfaces are positioned such as the first electrochromatic reflective surface forms the reflected view in the vehicle's side mirror during the system's normal operating state. Once the system is activated electrical voltage is applied to the electrochromatic first surface rendering it transparent thereby uncovering the conventional reflective mirror surface behind it which is offset by a fixed blind spot exposure angle that may range between +4 degrees and +24 degrees. The present invention also teaches of a number of alternative embodiments including: an anti-glare automatic dimming mode based on the use of an optional external light sensor, the integration with a vehicle's turn signals or external sensors as means of activating the blind spot exposure state, the ability to produce a speed sensitive mode in which the system engages in blind spot exposure mode for a shorter period of time at higher vehicular speeds; and the use of LED indicators to provide visual notification whenever the system in a given side mirror is in an expanded blind spot exposure state.

The invention belongs to the field of optical fiber surface plasmon resonance (SPR) sensing, and mainly relates to an optical fiber SPR curvature sensor with a direction recognition function and a using and manufacturing method, which can perform curvature measurement, bending direction judgment and multi-point simultaneous measurement based on a wavelength division multiplexing technology throughtwo parameters of resonance wavelength and resonance valley depth. A semi-circular surface SPR sensing film is plated on one side of a plastic cladding optical fiber core, and a plastic cladding anda coating layer are remodeled and restored by using a low-refractive-index coating adhesive outside the plastic cladding optical fiber core; compared with a curvature sensor based on optical fiber interference and a grating mechanism, the optical fiber SPR curvature sensor provided by the invention has the advantages that the structure is novel and stable, the bending performance is high, detection can be realized only by using a broadband incoherent light source and a visible light band spectrograph, and the like; the sensor and the method have good application prospects in the fields of geological environment monitoring of three gorges reservoir area landslides, reservoir banks and the like, building structure health monitoring and the like.

The invention provides a photovoltaic tabbing ribbon which is low in resistivity and great in light reflecting effect. The photovoltaic tabbing ribbon comprises a baseband which is provided with a front surface used for receiving light and a back surface used for connecting a solar cell. The photovoltaic tabbing ribbon also comprises a silver coating layer which covers the front surface of the baseband and a tin coating layer which covers the back surface of the baseband. The front surface of the silver coating layer outwardly protrudes to form a curved surface in a way of opposing the baseband. The connecting line of the center of the circle of all the curved lines forming the curved surface extends along the length direction of the tabbing ribbon.

The invention discloses a plastic reflective anti-collision strip which comprises an L-shaped matrix and a strip reflective film arranged on the outer surface of the matrix. An included angle between the reflective film and the horizontal plane is 30 to 52 angles; the surface of the reflective film is provided with a reflector array formed by triangular pyramidal reflectors which are densely arranged; an included angle of a groove between each two adjacent triangular pyramidal reflectors is 76 to 120 degrees. The plastic reflective anti-collision strip disclosed by the invention has a simple structure, strong reflection capacity and a large viewing angle, and can well reflect irradiating light in each direction so as to improve a use effect of the anti-collision strip at night and improve traffic safety at night.

The embodiment of the invention discloses a patterned composite substrate, a preparation method and an LED epitaxial wafer. Wherein the substrate comprises a sapphire substrate; the plurality of microstructure protrusions are located on the sapphire substrate, the microstructure protrusions comprise fluorine-doped silicon dioxide, and the refractive index of the fluorine-doped silicon dioxide is smaller than that of silicon dioxide. According to the patterned composite substrate, the preparation method thereof and the LED epitaxial wafer provided by the invention, the microstructure bulges made of the fluorine-doped silicon dioxide material are prepared above the sapphire substrate, and the refractive index of the fluorine-doped silicon dioxide material is lower, the refractive index difference between the substrate and the epitaxial layer material is larger, and the total reflection angle is increased, so that the light extraction rate can be improved; and the brightness of the epitaxial end and the chip end is improved. In addition, compared with a traditional silicon dioxide substrate material, the fluorine-doped silicon dioxide substrate material with the low refractive index is easier to etch under the same condition, the etching speed is high, the etching selection ratio is higher, and the productivity of dry etching can be improved.

The present disclosure provides a liquid crystal display device with reflective region. The liquid crystal display device includes: a CF substrate is disposed opposite with a TFT substrate and a liquid crystal layer arranged between the CF substrate and the TFT substrate; a reflective layer arranged between the TFT substrate and the liquid crystal layer, after external light passing through the CF substrate and the liquid crystal layer the light will be reflected by the reflective layer; a wavelength converting layer arranged between the reflective layer and the CF substrate is used to convert ultraviolet light to green light. In such a mode, the present disclosure can reduce amount of ultraviolet light and increase amount of green light, in order to reduce damage to the eyes and increase brightness in reflection.

An illumination device includes at least one semiconductor light emitting element, a supporting base, and a lamp housing. The semiconductor light emitting element is disposed on the supporting base. The lamp housing is disposed on the supporting base to cover the semiconductor light emitting element, and includes a first illuminating part and a lateral illuminating part surrounding the first illuminating part. A micro-structure is formed on a side of the first illuminating part and facing the semiconductor light emitting element for reflecting the light emitted from the semiconductor light emitting element.

The invention relates to the technical field of laser output equipment, and provides a laser collimator and a laser system. The laser collimator comprises an optical fiber, a first lens and a second lens; the optical fiber, the first lens and the second lens are sequentially arranged and distributed in the axis direction of the optical fiber; a through hole is formed in the first lens, and the through hole penetrates through the first lens in the axis direction of the optical fiber; and the first lens includes a first concave surface, and the first concave surface faces the second lens or theoptical fiber. The laser collimator and the laser system can effectively reduce the adverse effect of the return light on the laser system and improve the stability and security of the system operation.

The invention discloses an extensional structure of light-emitting diode, and its characteristic: it has at least two Prague reflectors, where the reflection spectrum of one Prague reflector covers the radiant light of light-emitting diode, and that of the other one after oxidized covers the radiant light of light-emitting diode. Because the oxidized Prague reflector has very large reflectivity and width of reflection spectrum, the light-emitting diode is increased in light-inputting efficiency.

The invention relates to hot air and microwave coupled drying equipment, belongs to the technical field of microwave drying, and aims to solve the problems that microwave drying is uneven and hot airdrying easily scatters materials. The hot air and microwave coupled drying equipment comprises a drying channel, a hot air generation device, a plurality of microwave generation devices, a separationcabin and a storage tank and is characterized in that the drying channel comprises a horizontally arranged continuous arc-shaped drying channel body; the hot air generation device is arranged at the feeding end of the drying channel; the microwave generation devices are arranged on the drying channel; the separation cabin is connected with the discharge end of the drying channel; the storage tankis arranged at the lower end of the separation cabin. The hot air and microwave coupled drying equipment has the advantages that by the special continuous arc-shaped spiral channel, materials can be prevented from being damaged by overheat and can be sufficiently mixed with hot air and microwaves during moving to achieve fast drying; in addition, the continuous arc-shaped drying channel allows microwaves to have large reflection angles on the inner wall of the channel, be reflected for many times and have long transmission distance, the transmission of the microwaves cannot be easily blocked by the inner wall without edges and corners, and microwave energy can be fully utilized.

The present invention is a wide-spectrum acousto-optic modulation spatial light blur stripping system and method. The system includes: a wide-spectrum light source, an acousto-optic modulator, an acousto-optic modulation driver, an ellipsoid mirror, a spatial aperture stop, and a black body absorption cavity; The light emitted by the spectrum light source is incident on the acousto-optic modulator at the Bragg diffraction angle for modulation, and the acousto-optic modulation drives and controls the acousto-optic modulator to emit a first-order or first-order diffracted beam; the first-order or first-order diffracted beam emitted from the acousto-optic modulator passes through the Reflected by the mirror, the first-order diffracted beam reflects and reaches the aperture stop, and the first-order diffracted beam reaches the black body absorption cavity and is absorbed by the black body absorption cavity. The invention uses an optical ellipsoid reflector device to realize beam blur suppression method, and strips and separates the diffracted beam and the transmitted beam output by the acousto-optic modulator.