169results about How to "Improve uniformity of illumination" patented technology

An improved lamp fixture with anti-glare function is disclosed, which comprises: a lamp; a light source; and a light-control unit, composed of a semi-Fresnel microstructure and a light-control microstructure; wherein the light source and the light-control unit are mounted on the lamp; and the semi-Fresnel microstructure is used for diffusing / collimating light of the light source while the light-control microstructure is used for controlling the resulting lighting angle. With the aforesaid lamp fixture, not only glare can be prevented, but also uniformity of the lamp fixture is improved.

The invention relates to an LED (Light-Emitting Diode) lens device, an LED lens device module and an LED lamp device. The LED lens device is used for covering the exterior of an LED and controlling the light direction of the LED and comprises a parabolic light-condensing bowl, a collimating lens and a facetted-eye lens system, wherein the collimating lens is arranged in the parabolic light-condensing bowl, and the facetted-eye lens system is arranged at the opening end of the parabolic light-condensing bowl; the focal point of the parabolic light-condensing bowl is coincided with that of the collimating lens; the LED is arranged at the focal point of the parabolic light-condensing bowl; one side of the collimating lens facing the LED is of a free curved surface; the facetted-eye lens system comprises a plurality of facetted-eye lenses which are in arrayed arrangement; the shapes of the facetted-eye lenses are of free curved surfaces; and the projection of the facetted-eye lenses along the axial direction of the parabolic light-condensing bowl is rectangular.

The invention discloses a large-view-field large-relative-aperture solar blind ultraviolet optical system. The system is formed by combining thirteen lenses and one ultraviolet narrowband optical filter and is sequentially composed of the first lens with positive focal power, the second lens with negative focal power, the third lens with negative focal power, the fourth lens with positive focal power, the fifth lens with positive focal power, the sixth lens with negative focal power, the seventh lens with positive focal power, an aperture diaphragm, the eighth lens with negative focal power, the ninth lens with positive focal power, the tenth lens with negative focal power, the eleventh focal power with positive focal power, the twelfth lens with positive focal power, the ultraviolet narrowband optical filter, the thirteenth lens with positive focal power and a focal plane detector from an object side to an image side. The work waveband is 260-280nm, F / # is 1.5, the focal length is 7.99mm, the view field is 75.2 degrees, and the length of the whole optical system is 157mm. The optical system realizes high illumination uniformity which is higher than 81.6%, improves the image quality by use of three aspheric surfaces and enables the total optical path lens of the optical system to be shorter. Through overall system movement, the system maintains high-quality imaging within a temperature scope from -40 DEG C to 60 DEG C.

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.

An exposure apparatus and method to expose an object with an illumination beam irradiated on a mask from a light source disposes an optical unit between the light source and an optical integrator of an illumination optical system to illuminate the mask with an illumination beam, of which an intensity distribution on a Fourier transform plane with respect to a pattern on the mask has an increased intensity portion apart from the optical axis relative to a portion of the intensity distribution on the optical axis.

The invention relates to an LED (light emitting diode) illuminating source, in particular to a uniform illuminating source and design method based on a multiband LED array and a diffuse reflection surface. A uniform illuminating source is designed with indirect illumination by applying the LED annular array and the diffuse reflection surface. The multiband LED array is distributed cyclically, the light of the LED is illuminated directly on a semispherical inner surface of high diffuse reflection from an annular bottom surface, and then is reflected on a target surface uniformly, so that uniform illumination is realized. According to the lambertian property of the LED and bidirectional distribution function of the diffuse reflection surface, a mathematical model of uniform illumination source is established. The uniform illumination source designed according to the invention can be used for a color vision detecting system, projection system and the like which require the multiband illumination. The uniformity of the degree of illumination is improved greatly, and a favorable color mixing effect is provided.

The disclosure discloses a multi-source homework lamp comprising: a first lampshade and a second lampshade connected to a shaft, wherein the first lampshade and the second lampshade are rotatable around the shaft; main lights disposed inside each of the lampshades; and a control unit for controlling the luminance of the main lights and controlling the rotation of the first lampshade and the second lampshade, thereby controlling the angle between the two. In the multi-source homework lamp according to the disclosure, by a design of the two-piece main lights with the angle being variable, the illuminance is caused to be more uniform, and the illumination range and the illumination luminance of the homework lamp may be adjusted more conveniently.

An exposure apparatus and method to expose an object with an illumination beam irradiated on a mask from a light source disposes an optical unit between the light source and an optical integrator of an illumination optical system to illuminate the mask with an illumination beam, of which an intensity distribution on a Fourier transform plane with respect to a pattern on the mask has an increased intensity portion apart from the optical axis relative to a portion of the intensity distribution on the optical axis.

The invention is suitable for the lighting field and provides a flood light reflector, a flood light and a motor boat. The inner surface of the reflector is formed by rotating a fold line section around an axle line, and the fold line section is formed by sequentially connecting a plurality of line sections; each line section has a projected length of 0.6-4.5mm on the axle line, and the extended line of the fold line section has an included angle of 0-40 degrees with the axle line; and the axle line and the optical shaft of a light source coincide. In the embodiment of the invention, the fold line section is rotated to form the inner surface of the flood light reflector, a minor part of light rays emitted by the light source directly emerge out, and the major part emerges out in a crossing way after being reflected by the reflector; a light-emitting angle of the flood light is 40+ / -2 degrees, and the illuminance uniformity inside the light-emitting angle is extremely high and meets the light distribution requirements of the flood light; and moreover, the size of the reflector can be greatly reduced, and the flood light and the LED lamps made by the reflector also have small sizes, are suitable for occasions having strict requirements on the sizes of the lamps and particularly can be used as the dome light or the ceiling light of the motor boat.

An exposure apparatus and method to expose an object with an illumination beam irradiated on a mask from a light source disposes an optical unit between the light source and an optical integrator of an illumination optical system to illuminate the mask with an illumination beam, of which an intensity distribution on a Fourier transform plane with respect to a pattern on the mask has an increased intensity portion apart from the optical axis relative to a portion of the intensity distribution on the optical axis.

A light source of an LED street lamp having light distribution comprises a metal heat conducting base, an LED crystal grain array, a bonding golden wire, a positive and a negative power supply flow deflectors, a fixed support, a silica gel lens, etc. The metal heat conducting base is provided with a drop pit used for being installed with LED crystal grains which are fixed inside the drop pit of the metal heat conducting base; after each group of crystal grains are connected in series, the positive pole and the negative pole of the crystal grain are respectively welded with wire connecting terminals on a positive wire solder plate and a negative wire solder plate, and a wafer array is encapsulated by silica gel. The light source is characterized in that the light source of the LED street lamp is provided with a plane metal heat conducting surface and two symmetrical luminous surfaces which have a certain included angle, and the two luminous surfaces are respectively provided with a silica gel lens having light distribution in a symmetrical way. The silica gel lens is fixedly arranged on the LED crystal grain array which is coated with fluorescent powder in the fixed support on the two luminous surfaces by adopting the method of mould pressing and encapsulation. Two light emitting surfaces can flexibly control the illumination scope and effect according to the luminous intensity requirements; the structure (being similar to a lens) for encapsulating the silica gel of the invention can change the emergence angle of light ray, thus obtaining ideal luminous spot effect; compared with the secondary light distribution of an optical lens, the light source can reduce the loss of light and ensures the light emitting efficiency of the LED light source to be higher. The generation and application of the technical products can lead the LED street lamp to achieve or exceed the illuminating effect of the traditional street lamp, thus realizing the green lighting in the true sense.

The invention relates to a floodlight total-reflection lens. The total-reflection lens is a rotary body with a rotary bus as a folding line; the rotary bus of the rotary body is the folding line which is formed by connecting four line sections in sequence; a light source mounting hole is formed on the light incoming surface of the total-reflection lens; a conical concave surface is arranged on the center of the light emitting surface, wherein the peak of the conical concave surface is on the symmetrical shaft of the total-reflection lens; the light source mounting hole comprises a cylindrical blind hole and a conical concave hole formed by extending the cylindrical blind hole inwards; and the symmetrical shaft of the cylindrical blind hole and the symmetrical shaft of the total-reflection lens are overlapped, and the peak of the conical concave hole is on the symmetrical shaft of the total-reflection lens. According to the floodlight total-reflection lens, the rotary bus of the floodlight total-reflection lens adopts the folding line, so that the total-reflection lens meets the requirements of a lighting angle and realizes the floodlight lighting, and simultaneously, the volume is minimized; and the light angle of a light source close to an optical axis can be enlarged through the conical concave surface of the light emitting surface and the bottom conical concave hole, and the lighting uniformity of the lamp in the lighting angle is improved greatly.

The invention provides a floodlight reflector, a floodlight and a powerboat, which are applicable to the field of lighting. The inner surface of the reflector is formed by a line segment rotating around an axis line, and the line segment is formed by connecting a plurality of segments sequentially; the projected length of each segment in the axis line is 0.6-7.8 mm; the included angle of the extension line of the line segment and the axis line is 8-40 degrees; and the axis line is coincided with the optical axis of a light source. In the embodiment, the inner surface of the floodlight reflector is formed by the rotation of the line segment, a small part of light rays sent by the light source are emitted directly, and most part of light rays are reflected by the reflector and then are emitted in a crossed way; the luminescence angle of the floodlight is 20+ / -2 degrees; the uniformity degree of the inner illumination intensity of the luminescence angle is extremely high, which can meet the light distribution requirement of the floodlight; and the size of the reflector can be reduced greatly so that the sizes of the floodlight and an LED light made from the reflector are also small. The invention is suitable for occasions with a strict requirement for the sizes of lights, and particularly can be used as a roof light and a ceiling light of a powerboat.

The invention discloses a Fresnel spotlight and a realization method thereof applied in a solar energy concentration photovoltaic system. The Fresnel spotlight comprises a series of concentric annular lenses and is characterized in that parameters determining lens position including gear pitch, gear height, curvature and cone parameter, are all independently calculated, and the annular lenses are set into form annular defocus, energy annules formed by the adjacent annules on the surface of solar cell are sequentially arranged, and finally the energy annules formed by each annule are integrated into a convergent light spot with good uniformity. If individual position of the convergent light spot is found to have phenomena, such as high energy or low energy when in illuminated area simulating detection, the energy of the illuminated area can be compensated through regulating the defocus on an annule or certain annules of Fresnel lens, thereby ensuring that the central energy extreme point of the confocal Fresnel lens is eliminated and the illumination degree uniformity of the light spots is improved under the conditions that the light spot areas are equal to that of the solar cells, and the concentration rate and the penetration rate are consistent.

The invention provides a floodlight reflector, a floodlight and a powerboat, which are applicable to the field of lighting. The inner surface of the floodlight reflector is formed by a line segment rotating around an axis line, and the line segment is formed by connecting a plurality of segments sequentially; the projected length of each segment in the axis line is 0.6-1.3 mm; the included angle of the extension line of the line segment and the axis line is 6.5-30.5 degrees; and the axis line is coincided with the optical axis of a light source. In the embodiment, the inner surface of the floodlight reflector is formed by the rotation of the line segment, a small part of light rays sent by the light source are emitted directly, and most part of light rays are reflected by the reflector and then are emitted in a crossed way; the luminescence angle of the floodlight is 100+ / -2.5 degrees; the uniformity degree of the inner illumination intensity of the luminescence angle is extremely high, which can meet the light distribution requirement of the floodlight; and the size of the reflector can be reduced greatly so that the sizes of the floodlight and an LED light made from the reflector are also small. The floodlight is suitable for occasions with a strict requirement for the sizes of lights, and particularly can be used as a roof light and a ceiling light of a powerboat.

The invention discloses an illuminating apparatus for improving illumination uniformity. The illuminating apparatus comprises at least two parallel LED lamp tubes. Each LED lamp tube comprises a strip lamp plate with LED illuminating particles arranged on one lateral surface of the same. The LED illuminating particles are distributed on the strip lamp plate in a manner of being dense at two ends and sparse in the middle. The invention further provides a method for improving illumination uniformity. The method includes: initially arranging the LED illuminating particles with equal power and in equal interval layout, subjecting the power of each LED illuminating particle to iterative correction to obtain LED illuminating particles with unequal power and in equal interval layout, and finally enabling the LED illuminating particles with the unequal power and in the equal interval layout to be equivalent to LED illuminating particles with equal power and in unequal interval layout. Therefore, illumination distribution high in uniformity can be obtained a certain distance away from the lamp tubes on which the LED illuminating particles are distributed in the layout mode.

The invention relates to an LED lens capable of being used for a direct LCD backlight. The lens is an axial symmetry entity made of transparent materials and comprises a bottom surface, a side, an upper curved surface and a center curved surface, wherein the bottom surface is a light incident surface; the side is a light refracting interface; the upper curved surface is the light refracting interface; and the center curved surface is the light refracting interface. The lens is arranged on an LED and enables the transmission direction of light rays entering the lens to change so as to obtain good light intensity distribution and realize the uniform illumination of the LED.

The invention relates to a light distribution lens. The light distribution lens comprises a bottom surface, a top surface and a lens side wall, wherein the lens side wall is used for connecting the bottom surface with the top surface; the inner side of the lens side wall is a fourth surface, which is a total reflection surface; the bottom surface is inwards depressed to form a cylindrical hole, the bottom part of the cylindrical hole is outwards protruded to form a first surface, the first surface is a free curved surface and the side wall of the cylindrical hole is a second surface; the top surface comprises a plurality of convex units, the plurality of convex units form a third surface; light is incident respectively through the first surface and the second surface; after the light is refracted and is totally reflected by the fourth surface, the light shoots the top surface along a direction approximately perpendicular to the top surface; each convex unit can project the incident light to an illuminating area which is approximately circular to form a circular light spot; the entire illuminating area is formed by the circular light spots projected by the plurality of convex units and overlapped in the illuminating area. Therefore, the light distribution lens can realize light field overlapped illumination and the illumination uniformity is higher. Besides, the invention further provides an LED lamp.

The invention discloses an ultrathin direct type backlight module which comprises a plurality of circular truncated cones, a plurality of sections of reflection partition plates, LED lamp beads, a circular cone, a base plate and a frame; the circular truncated cones, the circular cone and the reflection partition plates are all arranged on the base plate, and the base plate and the surface of theframe are both reflectors; the LED lamp beads are placed on the side faces of the circular truncated cones, the inclination angles of the circular truncated cones and the diameter of the bottom face are changed, the direction of the high light intensity of an LED chip is regulated, the light uniform difficulty is lowered, light is distributed again through the structures such as the circular truncated cones, the circular cones and the reflection partition plates, the light energy utilization rate and the brightness uniformity are improved, and the light mixing height is lowered. The thicknessof a liquid crystal display is lowered, no optical lens is needed, and therefore the machining and installing difficulty are lowered, and the cost is saved.

The invention provides a wide field image space telecentric optical system of a three-line-array three-dimensional aerial survey camera. The optical system comprises a first negative lens, a second negative lens, a first positive lens, a third negative lens, a first three-bonding-lens set, a diaphragm, a second positive lens, a fourth negative lens, a second three-bonding-lens set, a third positive lens, a fifth negative lens, a sixth negative lens, a fourth positive lens and a multi-spectral beam splitting system equivalent panel, wherein the first negative lens, the second negative lens, the first positive lens, the third negative lens, the first three-bonding-lens set, the diaphragm, the second positive lens, the fourth negative lens, the second three-bonding-lens set, the third positive lens, the fifth negative lens, the sixth negative lens, the fourth positive lens and the multi-spectral beam splitting system equivalent panel are arranged along a same optical axis in sequence. The second positive lens, the fourth negative lens, the third positive lens, the fifth negative lens, the sixth negative lens, the fourth positive lens and the multi-spectral beam splitting system equivalent panel form a rear lens set together, and the diaphragm is located on the front focal plane of the rear lens set. A negative lens-positive lens-negative lens structural form is adopted in the first three-bonding-lens set, and the negative lens-positive lens-negative lens structural form is adopted in the second three-bonding-lens set. The wide field image space telecentric optical system of the three-line-array three-dimensional aerial survey camera has the advantages of being wide in view of field, high in resolution, telecentric in image space and the like.

The invention provides an optical system of a large-visual-field high-resolution three-linear-array stereo aerial surveying camera. The optical system comprises a first negative lens, a first correcting lens, a second positive lens, a second negative lens, a cemented doublet lens, a third positive lens, a diaphragm, a fourth positive lens, a cemented triple lens, a third negative lens, a fifth positive lens and a sixth positive lens. The bending direction of the first correcting lens deviates from the diaphragm, the first correcting lens is crescent-shaped, the cemented face of the cemented doublet lens deviates from the diaphragm, and the cemented triple lens is of a negative lens-positive lens-negative lens structure. The optical system of the large-visual-field high-resolution three-linear-array stereo aerial surveying camera has the advantages of being large in visual field, high in resolution, ultra-low in distortion, telecentric in accurate image space and the like.

The invention relates to a reflector for a luminaire. The reflector comprises a cavity (101) for receiving a lamp intended to emit light and, located around said cavity, a first annular louver member (201) arranged in a first direction and a second annular louver member (202) arranged in a second, opposite direction.

A light diffusion plate made of quartz and provided with a plurality of recessed spherical surfaces is placed on an upper chamber window so as to be in opposed relation to a central portion of a semiconductor wafer. Flashes of light emitted from flash lamps and passing by the side of the light diffusion plate impinge upon a peripheral portion of the semiconductor wafer. On the other hand, flashes of light emitted from the flash lamps and entering the light diffusion plate are diverged by the recessed spherical surfaces. Part of the light entering the light diffusion plate is diffused toward the peripheral portion of the semiconductor wafer. As a result, this increases the amount of light impinging upon the peripheral portion of the semiconductor wafer, and decreases the amount of light impinging upon the central portion of the semiconductor wafer. Thus, the in-plane uniformity of an illuminance distribution on the semiconductor wafer is increased.

The invention discloses an LED flat light source structure, which comprises an aluminum substrate; the aluminum substrate is adhered with a reflective membrane and is provided with a plurality of luminous bodies; the front of the plurality of the luminous bodies is provided with a light guide plate for diffusing light; the front of the light guide plate is provided with a diffuse transmission plate; and the wall of the light guide plate close to the luminous bodies is provided with freedom surfaces which correspond to the luminous bodies and are used for refracting the light. Illuminators with the two-dimensional and rotationally symmetrical freedom surfaces refract the light so as to increase the radiation area of LED point sources and reduce the glare effect; the LED luminous bodies and the illuminator are arranged one-to-one, so that the flat luminous source structure is changeable according to the actual requirement, is convenient to extend, and can be used in a plurality of occasions.

The invention is suitable for the lighting field and provides a flood light reflector, a flood light and a motor boat. The inner surface of the reflector is formed by rotating a fold line section around an axle line, and the fold line section is formed by sequentially connecting a plurality of line sections; each line section has a projected length of 0.6-1.8mm on the axle line, and the extended line of the fold line section has an included angle of 5-40 degrees with the axle line; and the axle line and the optical shaft of a light source coincide. In the embodiment of the invention, the fold line section is rotated to form the inner surface of the flood light reflector, a minor part of light rays emitted by the light source directly emerges out, and the major part emerges out in a crossing way after being reflected by the reflector; a light-emitting angle of the flood light is 80+ / -2.5 degrees, and the illuminance uniformity inside the light-emitting angle is extremely high and meets the light distribution requirements of the flood light; and moreover, the size of the reflector can be greatly reduced, and the flood light and the LED lamps made by the reflector also have small sizes, are suitable for occasions having strict requirements on the sizes of the lamps and particularly can be used as the dome light and the ceiling light of the motor boat.

The invention discloses an ultraviolet LED optical system for surface curing. The ultraviolet LED optical system comprises an approximate lambert light type LED lenses, LED chips and a substrate. The invention further discloses a manufacturing method applied to the ultraviolet LED optical system for surface curing. The manufacturing method includes the following steps that 1, contour lines of the approximate lambert light type LED lenses are manufactured; 2, half-value angles of the approximate lambert light type LED lenses are determined; 3, the optimal space of an approximate lambert light type LED lens array is calculated; and 4, an approximate lambert light type LED lens model is obtained, the half-value angle of an LED chip and approximate lambert light type LED lens combined light source is obtained, and the optimal light source space is obtained. The ultraviolet LED optical system for surface curing has the advantages of being compact in structure, capable of increasing ultraviolet curing light spot illumination intensity, the energy utilization rate and the illumination uniformity, and the like.

The invention provides a floodlight reflector, a floodlight and a powerboat, which are applicable to the field of lighting. The inner surface of the reflector is formed by a line segment rotating around an axis line, and the line segment is formed by connecting a plurality of segments sequentially; the projected length of each segment in the axis line is 0.6-3.0 mm; the included angle of the extension line of the line segment and the axis line is 0-45 degrees; and the axis line is coincided with the optical axis of a light source. In the embodiment, the inner surface of the floodlight reflector is formed by the rotation of the line segment, a small part of light rays sent by the light source are emitted directly, and most part of light rays are reflected by the reflector and then are emitted in a crossed way; the luminescence angle of the floodlight is 60+ / -2.5 degrees; the uniformity degree of the inner illumination intensity of the luminescence angle is extremely high, which can meet the light distribution requirement of the floodlight; and the size of the reflector can be reduced greatly so that the sizes of the floodlight and an LED light made from the reflector are also small. The floodlight is suitable for occasions with a strict requirement for the sizes of lights, and particularly can be used as a roof light and a ceiling light of a powerboat.

The invention discloses a method for designing an LED plane light source structure, which comprises the following steps: in step of designing a light source, establishing a relation equation between the energy distribution of the light source and the energy distribution of a target illuminated surface; in step of designing beam, establishing a relation equation between the beam of each angle of the light source and the beam of each point of the illuminated surface; in step of designing entity models of a free curved surface of a transparent body, calculating two relation equations and combining a calculating result with reverse engineering modeling to obtain the entity models of the free curved surface of the transparent body; and in step of designing a light guide plate, combining the entity models of the free curved surface of the transparent body to form the light guide plate with an integrated structure through various arrangement modes. The manufactured LED plane light source structure has high utilization rate of light energy, effectively reduces the effect of dizziness, improves the brightness uniformity of the plane light source and the illumination uniformity of the irradiated target surface and has attractive appearance, practicality and energy conservation.