374results about How to "Uniform illumination" patented technology

The systems and methods disclosed herein relate to sources of diffuse illumination for providing substantially uniform illumination to a surface. The diffuse illumination arises from varying the diffusion angle of light generated by an LED system. To vary the diffusion angle, a translucent member is placed between the LED system and the surface. Light emitted from the LED system across the translucent member can subsequently can uniformly cover the surface.

The present invention relates to an LED lamp in which, because the lamp has therein a heat dissipation transfer member and the power source base thereof is made of materials including polycarbonate, etc. with a high emission rate of radiation so as to enhance its surface heat dissipation constant, the power source base has sufficient heat dissipation performance and, thus, a separate insulation circuit is not necessary, thereby improving reliability and productivity of the lamp as well as reducing the cost of manufacturing.To this end, the present invention provides an LED lamp comprising one or more LEDs mounted on a PCB, a floodlight cover that transmits light from the LEDs, and a power source base coupled to the floodlight cover and having a terminal at one end thereof, wherein the power source base is made of an insulation material; and the LED lamp also comprises a heat dissipation transfer member that has a heat sink in contact with the PCB on which the LEDs are mounted, and is formed and installed so as to overlap with and be in tight contact with the inner face of either the power source base or the floodlight cover or both.

The invention relates to a lens for LED street lamp. A concave pit is provided in the middle of a first side face of the lens and allowing LED to be arranged therein, and the pit wall of the concave pit forms an incident face; an arcing bulge in the middle of a second side face of the lens forms an emergent face with the shape of pillow; and a totally reflecting face is circumferentially provided around the concave pit on the first side face of the lens. The invention also relates to a LED street lamp, which comprises a frame, and a lighting module arranged on the frame, wherein the lighting module comprises a thermal radiator, a substrate with a LED array, a PCB board with a through-hole array and a lens cap with a lens array. The substrate is provided on the undersurface of the thermal radiator, PCB board is provided on the outer surface of the substrate and connected with each LCD electrode, the lens cap is provided at the outer side of the PCB board, LEDs pass through the through-holes on the PCB board to be accommodated in the concave pit corresponding to the lens, and the lens array is formed by arranging and combining a plurality of above mentioned lenses. The invention can control the distribution of light to form rectangular light spot. The light in the effective illuminated zone is very uniform and there is no parasitic light outside the zone.

A method for using LEDs to supplement natural light in a greenhouse and a support structure for attaching LEDs in a greenhouse so that the plants receive substantially even light distribution from the LEDs and minimal natural light is blocked by the lighting system. A narrow attachment rail is used to suspend a strip of LEDs from the frame structure of the greenhouse.

A lens is provided for use with a solid-state light-emitting device, typically a light-emitting diode. The lens may be used in luminaries for roadway lighting and other applications. In one embodiment the lens includes a conical structure proximate the light-emitting source of the light-emitting device.

The invention relates to an eyepiece, in particular to an eyepiece used in a head-mounted display, belonging to the field of optical technique. The eyepiece is formed by six pieces of lenses, and a lens screen, the first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are sequentially arranged from the observing side of human eyes and the display device side along the direction of an optic axis in a coaxial way; the exit pupil diameter of the eyepiece is larger than that of the common eyepiece, the eye relief is long, the angle of view field is large, and the focal distance and F / # are small; furthermore, illuminance of image plane is evener, so that the eyepiece especially meets the requirements of the head-mounted display.

A lighting device includes a substrate, a LED element, and a lens. A light exit surface of the lens includes a first light exit surface and a second light exit surface. A curve obtained by cutting the light exit surface by a plane including the optical axis has, on a boundary between the first light exit surface and the second light exit surface, a change point at which a rate of inclination decreases discontinuously. An angle between the optical axis and a line segment connecting the change point and a light emission center of the LED element is approximately equal to an emission angle with the highest light intensity, among emission angles, when light rays emitted from the light exit surface are sorted by respective emission angles.

A gain structure of an LED tubular lamp for uniforming light and dissipating heat is disclosed. The gain structure allows the LED tubular lamp to give out even illuminance without eye-offending peak illuminance of LED chips. The LED tubular lamp has an illuminator, which includes a substrate equipped with spacedLED chips, wherein the LED chips are arranged in a density equal to or greater than 2 chips / cm2, so that the LED chips illuminate through the frosted housing jointly present pleasing, uniform illuminance. The substrate is provided with metal sheets serving to absorb heat generated by the LED chips that are illuminating, so as to accelerate heat dissipation and thereby prevent the LED chips from premature aging that degrade their brightness.

The invention relates to an ocular, comprising an aperture, a first lens, a second lens and a third lens which are coaxially and successively arranged from the observing side of human eyes to the display device side along the direction of an optic axis, and the relation among materials, the focuses and positions of the first lens, the second first lens and the third lens meet a certain relation, thus an image displayed on a displayer is imaged in human eyes at the aperture after being amplified by the ocular. The ocular of the invention has the advantages of large bore diameter, large field of view, short focus, low aberration and the like, is suitable for the head-wearing displayer and similar devices, can be made of optic plastics, and has light weight and low cost.

A lamp comprises: a thermally conductive body; a plurality of LEDs configured as an array and mounted in thermal communication with the body and a light reflective hood located in front of the plane of light emitting diodes. The hood has at least two frustoconical light reflective surfaces that surround the array of LEDs and are configured such that in operation light emitted by the lamp is within a selected emission angle (beam spread). The hood is configured such that in operation a variation in illuminance (luminous flux per unit area incident on a surface) is 10% or less over approximately a third to one half of the selected emission angle.

A gain structure of an LED tubular lamp for uniforming light and dissipating heat is disclosed. The gain structure allows the LED tubular lamp to give out even illuminance without eye-offending peak illuminance of LED chips. The LED tubular lamp has an illuminator, which includes a substrate equipped with spaced LED chips, wherein the LED chips are arranged in a density equal to or greater than 2 chips / cm2, so that the LED chips illuminate through the frosted housing jointly present pleasing, uniform illuminance. The substrate is provided with metal sheets serving to absorb heat generated by the LED chips that are illuminating, so as to accelerate heat dissipation and thereby prevent the LED chips from premature aging that degrade their brightness.

The present invention proposes scanning method to form planar light source, the scanning planar light source and projection television with the planar light source. The method is that a fine light beam is projected onto a multiple-surface reflector in high speed rotation, the rotation reflector has fixed inclination angle in the rotation shaft direction in its reflecting surfaces and thus the scanning light beam forms planar scanning in the irradiated plane. By means of scanning, the planar array spatial light modulator for light display obtains homogeneous irradiation with high light energy utilization, homogeneous illumination and no interference. The scanning features that each scanning dot can cover one large pixel and the scanning lines have relatively more overlapping to ensure homogeneous brightness of the scanned plane.

An endoscope having a single-use disposable illumination and camera module is provided in which an imaging element is disposed within an annular tube of optically transparent material having proximal and distal ends, wherein the proximal end is configured to engage a plurality of LEDS and the distal end has a cross-section in the form of an arc of a circle or ellipse, so that the annular tube serves as a light mixer and diffuser, providing uniform illumination within the field of view of the imaging element. Methods of analyzing and displaying the output of the endoscope also are provided.

The invention comprises an imaging mechanism, and an LED illuminator which emits illuminating light to an imaging area of the imaging mechanism. The LED illuminator includes a light emitting module having light emitting elements arranged therein, a Fresnel lens which brings light from the light emitting module into parallel rays of light, a pair of lens arrays arranged in a direction of light coming from the light source, the pair of lens arrays shaping the parallel rays of light produced by the Fresnel lens into a rectangle, and an adjustment mechanism which adjusts an interval between the lens arrays in accordance with an imaging area of the imaging mechanism.

The invention provides an automobile crossbeam assembly hole visual on-line measurement system and a method thereof. The system comprises a main control platform, a servo motor, a servo motor encoder, a slide platform, a slide block, a horizontal slide rail, a fixed high and low frame, a camera and a measured crossbeam. A host is arranged on the main control platform. A motion control card and an image acquisition card are respectively inserted in PCI insertion slots of the host. The host is connected with the servo motor through the motion control card. The servo motor encoder is coaxially connected with the servo motor. The servo motor is fixed on the slide platform. The slide platform is matched and connected with the horizontal slide rail through the slide block. The horizontal slide rail is arranged on the high side of the fixed high and low frame. The host is connected with the camera through the image acquisition card. The camera is arranged on the slide platform through a Z type height adjustable bracket. The measured crossbeam is arranged on the low side of the fixed high and low frame. According to the invention, non-contact and full-automatic high speed on-line measurement is carried out on the hole diameter and the hole site size of an automobile crossbeam assembly hole; and the system and the method are especially suitable for the measurement of the crossbeam with nonuniform assembly hole distribution and without assembly holes in certain areas.

A gradually-changed trapezoidal light spot lens comprises a lens body, and is characterized in that the lens body consists of a 1 / 4 spherical surface and a cylinder, and the 1 / 4 spherical surface is gradually transited into the cylinder; and the lens body is provided with a light entering concave surface, a light exiting surface and a reflecting surface, wherein the light entering concave surface is arranged at the bottom of the spherical surface; the light exiting surface is arranged on a body surface of the spherical surface; the reflecting surface is arranged on the top of the lens body; the light entering concave surface is a 1 / 2 round-top conical concave surface; the light exiting surface consists of a 1 / 4 spherical surface and a cylindrical surface tangent with the 1 / 4 spherical surface; and the reflecting surface is an inclined plane. During application of the light-emitting diode (LED) gradually-changed trapezoidal light spot lens, light rays of a light source can be effectively controlled on a rectangular area, and the illumination of the gradually-changed trapezoidal light spot lens on the rectangular area can be uniform. The light rays of the LED light source are effectively utilized.

A lens for a liquid crystal display, and a backlight unit and a liquid crystal display having the same. The lens for a liquid crystal display includes a flat portion, a curved portion connected with the flat portion, facing the flat portion and including a first curved surface having a first curvature, and a groove disposed in the flat portion and including a second curved surface having a second curvature. The lens and the groove are formed to extend longitudinally in a first direction.

A projection lens (10) for a microlithographic projection exposure apparatus has a first optical element, for example a birefringent lens (L2), that has polarization dependent properties causing intensity fluctuations in an image plane of the projection lens. These fluctuation may be produced by a second optical element (24), for example a polarization selective beam splitting layer (28), that is arranged downstream of the first optical element. A gray filter (32; 132; 232) disposed in the beam path reduces the intensity fluctuations.

The invention discloses a LED tunnel light. It includes shell and lighting module. The former includes lamp body fixed structure. The latter includes lens shade formed by lens array which formed by astigmatism convex and condense edge. The astigmatism includes light incidence and emergent planes. The lamp body fixed structure includes fixed frame and fixed plated surface. The invention can control the light distribution to make faculae form rectangle, have even illumination in effective area, little or no parasitic light out the area.

Medical or dental instruments having a lighting device, manufacturing methods for such instruments and various lighting devices having an optical semiconductor element are described. The lighting devices have, for example, a body, at least one radiation-emitting surface on a radiation-emitting end of the body and at least one fluid channel which is provided in the body and connects at least one opening which is provided on the radiation-emitting end to one or more fluid sources for dispensing fluid. The lighting devices have, for example, a hollow metallic sleeve, a transparent window for emission of electromagnetic radiation and a socket on which at least one optical semiconductor element is arranged. The socket is made of a ceramic, glass ceramic or glass material, and is connected to the hollow metallic sleeve by a material comprising metal and glass.

The invention belongs to the field of optical lenses, and particularly relates to a one-step packaging LED (Light Emitting Diode) lens with a free curve and a design method of the same. The lens comprises a plane and the free curve, wherein the plane corresponds to an inner surface, and the free curve corresponds to an outer surface and is used for realizing uniform illumination and rectangular light distribution. When a light emitting surface of an LED chip emits light beams, the light beams are received by a primary lens after being refracted through the inner surface, and are emitted on a road surface through the free curve. The shape of the free curve is obtained through numerical solution based on the energy conservation law and the requirements for the illumination uniformity. As the one-step packaging lens comprises the free curve, all light emitted by LEDs can illuminate the road surface; thus, the utilization rate of the light beams is increased, and the 'zebra pattern effect' is avoided. When the lens is used, the uniform illumination can be realized through combining a plurality of packaged LEDs, the link of the secondary optical design is eliminated, and therefore, a lot of time is saved. The one-step LED light distributing lens is widely used, is suitable for all fields in need of uniform illumination, and has great social and economic benefits.

A light emitting apparatus can prevent unevenness in illuminance from being produced. This light emitting apparatus 5 has: light emitting elements 3 that emit light; and light flux controlling members 4 that control the traveling directions of light emitted from light emitting elements 3, and a plurality of grid convex parts 13 are formed in back surface 12 (i.e. lens bottom surface) of light flux controlling member 4. Grid convex parts 13 vary the incident angles of light incident on back surface 12 of light flux controlling member 4. Therefore, light incident from back surface 12 is scattered without being concentrated, and is emitted from light flux controlling member 4. A surface light source apparatus (1) and a display apparatus (6) include the light emitting apparatus (5).

The invention relates to a novel alcohol degree detection method and apparatus, especially relates to an detection method and apparatus based on a color sensitive material, wherein the detection method and apparatus are used to detect the alcohol degree during the fermentation process in real time, and belongs to the fields of fermented product raw material utilization and quality control. The apparatus comprises an upper computer, three CCD cameras, a LED integrating sphere light source, a base, a gas reaction chamber, an air inlet, an air outlet, a vacuum pump, a gas collecting probe with a special filter screen, and a temperature sensor. After the gas collected by the gas colleting probe reaches the gas reaction chamber, the gas reacts with the color sensitive material sensor arrays, which are adhered on the polyvinylidene difluoride membrane in the array area of a gas sensor; the color sensitive material is sensitive to alcohol, and thus the alcohol degree can be determined by watching the color change after the color sensitive material reacts with ethanol. The provided method and apparatus has the advantages that the operation is simple and convenient, the method is intelligent; the apparatus is simplified and is convenient to move; at the same time the detection system cost is reduced; and furthermore, the provided apparatus can be used to detect liquid alcohol and semi-solid alcohol.

The invention discloses a plant tissue culture rooting and seedling exercising integrated cultivating device and a cultivating method thereof. The cultivating device comprises a plant cultivation system, an illumination system, a ventilation temperature-control system, a fluid supplying system, a CO2 supplying system and an environment control system. The plant cultivation system comprises a three-dimensional multi-layer cultivation frame and cultivation containers placed on the cultivation frame, each layer of multiple layers of the cultivation frame is provided with one cultivation container, and lifting seedling disc supports are arranged at the bottoms of the containers and used for suspending cultivation plants. The illumination system comprises lamp boxes, LED lamp tubes and fans, and the LED lamp tubes are arranged inside the lamp boxes and connected with the fans to be installed above the cultivation containers in an integrated mode without communication with the cultivation containers. On the premise of guaranteeing that space and time are saved, the cost is low, and the utilization rate of resources is high, the utilization rate of the resources and labor productivity are increased, the cultivation period is shortened, and the production cost is lowered.

The invention relates to an economical high resolution day and night fixed focus lens. A front group with a negative focal power and a back group with a positive focal power are orderly arranged along a light incident direction. The front group is orderly provided with a positive crescent lens A-1 and a negative crescent lens A-2. The focal length fA of the front group is -21.996mm. The back group B is orderly provided with a gluing group with the closed connection of a biconcave lens B-1 and a biconvex lens B-2 and a biconvex lens B-3, and the focal length fB of the back group is 6.792mm. According to the lens, the total number of lends is reduced in the condition of ensuing performance, besides the high resolution, large relative aperture, day and night confocal performance, low distortion and short shooting distance of an 8mm fixed focal lens, the economical high resolution day and night fixed focus lens is more economical and is generally used in a dark or no-light place with the requirement of high definition picture quality such as a road, a warehouse, an underground parking place, a bar, a pipe, a corridor and a park, and the economical high resolution day and night fixed focus lens is a mainstream product of a micro monitoring camera system.

The invention discloses a lighting system and a lighting method of a highway tunnel. The lighting system comprises tunnel lighting lamps arranged on the middle part of the interior of the tunnel, tunnel portal lighting lamps arranged on two port parts of the interior of the tunnel, and light shielding sheds arranged on the exterior of two ports of the tunnel, wherein the inner side of the light shielding shed is provided with a liquid crystal light valve plate and a light shielding shed lighting lamp, the lighting lamps in the light shielding sheds and the tunnel are matched with a control system to be controlled, so that the lighting change of a light transition section from the outer end of the light shielding shed to the interior of the tunnel port is more mitigatory, and the lighting intensity of the light shielding shed lighting lamps, the tunnel lighting lamps and the tunnel portal lighting lamps can be adjusted by the control system, so that the electrical energy can be saved on the premise that uniform and safe lighting is ensured.

The invention relates to a LED street lamp device, belonging to the field of lighting equipment. The road lighting is one of the important constituent parts of city infrastructure. With the increasing of perception of environmental protection, environmentally friendly lighting fixtures will be a hop topic. The invention provides a LED street lamp device capable of forming rectangular light spot. In the device, the LED modules 1-50 are arranged in the lighting fixture in group; the optical device is composed of an aspheric central collimating lens, a parabolic reflecting cup and an aspheric microlens array; and the LED light source is arranged at the bottom of the reflecting cup, and the aspheric microlens array is disposed perpendicular to the optical axis. Adjusting the position of aspheric central collimating lens and aspheric microlens array in the parabolic reflecting cup and the elevation angle of LED to make the light from LED parallelly emitted, and finally a rectangular light spot with uniform illumination intensity is formed on an objective illumination surface.