81results about How to "Uniform illumination distribution" patented technology

An optical element for arrayed light source has a bar-like optical element and a light guide portion, which is a bar-like part formed on an incident portion side of the optical element portion, has a totally reflecting portion which causes emitted light from each of a plurality of LED that has an angle not less than a prescribed angle relative to an optical axis plane of the optical element portion to be totally reflected toward a plurality of concavo-convex reflecting portions provided between two LEDs adjacent to each other, the plurality of LEDs being arranged in a linear manner or an annular manner. The light guide portion guides, to the incident portion of the optical element portion, light reflected in each of the plurality of concavo-convex reflecting portions and emitted light that has an angle less than the prescribed angle.

The invention has an object of obtaining an illuminating panel by which an illuminated area having a high illuminance and a stable flat illuminance distribution can be formed with a long irradiation distance while power is being saved. An illuminating panel 100 has disposed thereon a plurality of linear light source units 200, and the linear light source units 200 each include: a light emitter having a plurality of light emitting diodes linearly installed on a base; a first reflector formed of parabolic surfaces which are provided on a light emergence side of the light emitter in such a way as to correspond to the plurality of light emitting diodes, and light emitting faces of which fall in focal positions; and a second reflector having a pair of flat plate-like reflecting surfaces which, being arranged with the light emitting diodes sandwiched therebetween, farther to the light emergence side than the first reflector and parallel to an array direction of the light emitting diodes, reflect light from the light emitting diodes toward the light emergence side, wherein the linear light source units 200 are annularly disposed on a module panel.

An image sensor unit has a light emitting module and a light guide that guides light emitted by the light emitting module to a bill, the light guide has an incident surface on which the light emitted by the light emitting module is incident, a reflection surface that reflects the light having entered the light guide through the incident surface, and an emission surface from which the light reflected by the reflection surface is emitted toward the bill, and the reflection surface is formed by a plurality of contiguous flat surfaces.

The invention provides a two-free-curved-surface optical lens used for an ultrathin direct-lit type LED backlight system. The two-free-curved-surface optical lens comprises two free curved surfaces which serve as an incidence face and an emergent face respectively. According to the shape of the free curved surface lens, a spatial right-angle coordinate system is established with an LED light source as an original point, the plane where the LED bottom face is located serves as a plane XOY, the axis passing through the original point and perpendicular to the plane XOY serves as a Z axis, the light source three-dimensional angle is divided first, annular belt division is conducted on the illumination area on the target illumination face, the mapping relation between the light source three-dimensional angle and the annular belt area on the target illumination face is established according to the law of conservation of energy, and the final double-free-curved-surface lens is obtained through the geometric relation according to the laws of refraction and reflection. The two-free-curved-surface optical lens is small in size, light rays emitted by LEDs can form circular light spots which are uniform in luminance distribution after passing through the two-free-curved-surface optical lens, and the output efficiency of the lens is quite high.

The invention relates to the technical field of fishing devices, in particular to a light-emitting diode (LED) fishing lamp device. The device mainly comprises a lamp shade, an LED integrated unit line module, a micro-optics lens array, a radiating device, a line module angle rotating device and a whole lamp angle rotating device. The device can be installed on a fishing boat and used for emitting light to gather phototaxis fishes such as sleeve-fish and saury. Compared with the prior art, the device has the advantage that a local part or an overall condition of an area irradiated by the fishing lamp device can be adjusted according to an installing condition of a fishing lamp and a sea state during fishing, illuminance distribution in the irradiated area is even, and a fish alluring effect of light is improved.

An illumination device including a light source device includes a light source being constituted by LED(s); a light source side reflective plate to which the light source is fixed; an emission side reflective plate facing the light source side reflective plate; and a fixing means for fixing the both reflective plates, wherein the emission side reflective plate is formed so that a portion thereof facing the light source has the highest optical reflectance and the lowest optical transmittance while the optical reflectance decreases and the optical transmittance increases farther away from the light source, and the distance between the both reflective plates is greatest at a portion where the light source is disposed, while the distance decreases at portions farther away from the portion where the light source is disposed. Thus the device can supply light in a substantially uniform manner from a light irradiation surface.

The invention provides an underwater large-field-of-view continuous zooming optical system, thereby solving problems of small field of view angle, small zoom ratio, small system size, and complicatedsystem structure of the existing underwater continuous zooming optical systems. The provided underwater large-field-of-view continuous zooming optical system comprises a window, a front fixed mirror group, a zooming mirror group, a diaphragm, an intermediate fixed mirror group, a compensation mirror group, an aberration stabilizing mirror group, a rear fixed mirror group, and a filter that are arranged successively and coaxially in an optical axis direction. The front fixed mirror group includes a first glue mirror group having the positive focal power and a second positive lens. The zooming mirror group includes a second negative lens and a second glue lens group having the negative focal power. The intermediate fixed lens group includes a fourth positive lens group a third glue lens group having the positive focal power. The compensation mirror group includes a fifth negative lens and a sixth negative lens. The aberration stabilizing mirror group includes a sixth positive lens. And the rear fixed mirror group includes a seventh positive lens, a seventh negative lens, and an eighth positive lens. The zooming mirror group, the compensation mirror group, and the aberration stabilizing mirror group can move linearly back and forth in an optical axis direction.

A lighting device (100) includes: a surface light source (1); a first lens (L1) having a first focal point (F1), the first lens being provided on the light exit surface side of the surface light source; and a second lens (L2) having a second focal point (F2), the second lens being provided on a light exit surface side of the first lens, the surface light source, the first lens, and the second lens being configured such that a first virtual image (I1) is formed by the first lens and a second virtual image (I2) is formed by the second lens, wherein the first virtual image (I1) is formed between the second focal point (F2) and the first lens, and the second focal point (F2) is on a side opposite to the light source side relative to a predetermined focal position f′.

A reflective-type efficient LED optical lens is disclosed, belonging to the technical field of semiconductor illumination. A recess is arranged at the middle of the bottom surface of a transparent material body, walls of the recess form into a light-incoming face, the top surface corresponding to the transparent material body at the periphery of the light-incoming face is a light-exiting face, full-circle inclined planes are arranged along the edges of the light-incoming face and the light-exiting face, the bottom surface around the recess is provided with a positioning wall that positions an LED light source, a support leg is arranged on the inclined plane near the positioning wall around the recess, the bottom surface of the support leg is provided with a positioning post. An optical portion of the lens composed of the inclined planes, a light-incoming face and the light-exiting face and a mounting portion of the lens composed of the positioning wall, the support leg and the positioning post constitute the lens jointly. By utilizing the optical lens to implement a secondary light distribution on dispersed lights emitted from the LED light source and to reflect partial lights, the light-exiting efficiency of the LED is efficiently promoted and the optical system for light field distribution of the LED is varied so that illuminance in road illumination areas are distributed uniformly and the illumination effect is superior.

The invention discloses a dual-mode multipurpose continuous zooming optical system comprising a driving mechanism and a diaphragm. The dual-mode multipurpose continuous zooming optical system also comprises a front fixed lens group, a zooming lens group, a compensating lens group, an aberration stable lens group and an optical filter which are arranged from the left to the right in turn. The left side of the front fixed lens group is an object plane. The right side of the optical filter is the focal plane of the dual-mode multipurpose continuous zooming optical system. The front fixed lens group, the zooming lens group, the compensating lens group, the aberration stable lens group and the optical filter are coaxial in central axis. The driving mechanism drives the zooming lens group, the compensating lens group and the aberration stable lens group to linearly move in a forward-and-backward direction in the optical axis direction of the dual-mode multipurpose continuous zooming optical system to realize continuous zooming. The total length of the dual-mode multipurpose continuous zooming optical system is constant in the process of continuous zooming. The dual-mode multipurpose continuous zooming optical system is an optical system which is small in size, compact in structure and particularly suitable for an optoelectronic pod and can realize the function of continuous zooming and has two working modes of high-definition video photographing and ultrahigh-definition photographing imaging.

The invention discloses an LED free-form curved face lens used for an optical microscope illumination system. The lens comprises three free-form curved faces. A cavity is formed in the center of the bottom face of the lens, wherein an LED is arranged in the cavity. One part of the cavity wall of the cavity is a cylindrical face which forms an inner side cylindrical face, and the other part of the cavity wall is a free-form curved face which forms an inner side free-form curved face. The inner side free-form curved face is located on the top of the inner side cylindrical face. The inner side free-form curved face and the inner side cylindrical face form an incidence face of the lens. The outer side face of the lens is a free-form curved face which forms an outer side free-form curved face. The middle of the top face of the lens is a free-form curved face which forms a top free-form curved face. The outer side of the top free-form curved face is a partial cylindrical face. The top of the partial cylindrical face is a plane which forms a top plane. A transmitting face of the lens is composed of the top free-form curved face and the top plane of the lens. The LED free-form curved face lens is compact in structure and small in size; the LED free-form curved face lens used for the optical microscope illumination system can form circular light spots which are uniform in illumination distribution on a target illumination face, and meanwhile the high optical efficiency is kept.

The embodiment of the invention discloses an LED (light emitting diode) light source module and an LED light source thereof. The LED light source comprises an LED enclosed single lamp, a side wall ring and a reflection device, wherein the LED enclosed single lamp consists of an enclosed support, a luminescent chip, a fluorescent adhesive and a light distribution lens, and the luminescent chip, the fluorescent adhesive and the light distribution lens are fixedly arranged on the enclosed support; the side wall ring is arranged on the periphery of the LED enclosed single lamp, the bottom of the reflection device is fixed together with the LED enclosed single lamp, and the C0-180 cross section and the C90-270 cross section of the reflection device are respectively coincided with the C0-180 cross section and the C90-270 cross section of the light distribution lens; and the C0-180 cross section profile of the reflection device is of a symmetrical shape, the C90-270 cross section profile of the reflection device is of a non-symmetrical shape, and the zenith height of the C0-180 cross section profile of the reflection device is less than that of the C90-270 cross section profile. In the application of street illumination, the LED light source module and the LED light source thereof particularly aim at the illumination of driveways, and the availability of illuminant light quantity is increased by 5-10 percent; and in the application of light cast illumination in a large area, the gradual change transition from the area below a lamp post to a periphery area is realized, so that an obvious dark field and a bright spot in an illuminant area are enabled not to occur, and the LED light source module and the LED light source thereof have the advantages of simple process and lower cost.

The present invention provides a LED street lamp optical system, including a LED lamp, a connector, a main reflector and an auxiliary reflector, the main reflector is composed of multiple elementary cells, the axes of reflecting surface of each elementary cell is mutual parallel, the bottom of the each elementary cell of main reflector has multiple openings for placing LED lamp, the auxiliary reflector are two, located in two sides of the main reflector respectively, mounted in V shaped groove of the top of two sides of the main reflector, the optical system forms a lighting area similar to rectangle on the road surface, for effectively utilizing optical energy, enhancing energy saving effect of LED lamp; the illumination intensity in the lighting area is evenly distributed, capable of meeting requirement of lighting uniformity of national relating standard; the optical system has a simple structure, easy to produce, in addition, since area far from the lamp head is lighted by reflecting light, glare is effectively reduced.

Disclosed is a light source device (4) capable of being used by adjacently connecting with each other in multiple, the light source device includes: a point light source (5) having high directionality; a box-shaped housing (6) having a bottom to center of which the point light source is fixed, sidewall portions arranged in a standing manner from edges of the bottom up to a predetermined height, a side portion defining an opening provided facing the point light source, and a reflection member forming an inner wall surface of the housing; and a transmissive / reflective plate covering the opening of the housing and being fixed at a circumference thereof to edges of the opening of the housing. At least one of the sidewall portions that is in contact with a sidewall portion of another light source device is arranged in a standing manner at an angle θ, where 90°<θ≦150°, relative to the bottom, and is provided with a light-transmitting hole on the side of the opening of the housing.

A polarizing element unit, a transmittance setting method of polarizing element unit, and a light irradiation apparatus using the same, in the arrangement of multiple wire grid polarization components of polarization components unit, even if the polarization components of transmittance is individual difference, also make the light area of uniform illumination distribution. Multiple wire grid polarization element to the end in the direction of the light from the light source through overlapping way along the direction of array configuration in a box body, on the box body, and various polarization components corresponding to the set have to through the polarization components of light shading shading institutions. Shading institutions consists of multiple mask, the mask to the polarization components on the outstanding amount is variable, by changing the screen of the outstanding amount, to adjust the transmission the polarization components of light transmission. Thus, even if the wire grid polarization components of transmittance is individual difference, also can make each polarization components of the same amount of light transmission, can make the light area of uniform illumination distribution.

A pseudo-sunlight irradiating apparatus (18) is provided with optical system sets (100, 101) each of which is comprised of a xenon light source (16) and a halogen light source (17), a light-guiding plate (10), and a prism sheet (11). Transmittance adjustment sheets (12a-12c) are formed on the prism sheet (11). The transmission rate adjustment sheets (12a-12c) has: a characteristic of letting most of the light having a wavelength shorter than a prescribed wavelength be transmitted therethrough, and reflecting most of the light having a wavelength longer than the prescribed wavelength; and / or a characteristic of reflecting most of the light having a wavelength shorter than a prescribed wavelength, and letting most of the light having a wavelength longer than the prescribed wavelength be transmitted therethrough. This enables transmittance of xenon light and transmittance of halogen light to be adjusted independently.

The embodiment of the invention provides a lens assembly of terminal equipment, the terminal equipment and a light supplement control method of the terminal equipment. The lens assembly comprises a lens and a plurality of light supplementing lamps arranged on the outer side of the lens, and the luminous intensity of the plurality of light supplementing lamps can be independently adjusted so as toindependently supplement light to a plurality of subareas of the view field of the lens. According to the lens assembly provided by the embodiment of the invention, independent light supplement can becarried out on the sub-regions with relatively small or relatively large illuminance in the view field of the lens by independently adjusting the luminous intensity of the light supplement lamp, so that the illuminance distribution in the view field is relatively uniform, the brightness of the imaging picture of the terminal equipment is relatively uniform, and the experience feeling of a user isimproved.

A pseudo-sunlight irradiating apparatus (18) includes optical system sets (100 and 101) each including a xenon light source (16) and a halogen light source (17), a light guide plate (10) and a prism sheet (11). Transmittance adjusting sheets (12a to 12c) are provided on the prism sheet (11). The transmittance adjusting sheets (12a to 12c) have at least one of properties in which (i) most light whose wavelength is shorter than a predetermined wavelength pass through and most light whose wavelength is longer than the predetermined wavelength is reflected and (ii) most light whose wavelength is shorter than the predetermined wavelength is reflected and most light whose wavelength is longer than the predetermined wavelength pass through. It is thus possible to independently adjust a transmittance of xenon light and a transmittance of halogen light.

The invention discloses an optical sheet and the application thereof. The optical sheet at least comprises a substrate, a plurality of polygonal convex structures and a plurality of diffusing particles. The polygonal convex structures are arranged on a surface of the substrate, wherein, the substrate and the polygonal convex structures are made of transparent materials; and the diffusing particles are diffused in the substrate and the polygonal convex structures, wherein, the refraction coefficient of the transparent materials is not equal to that of the diffusing particles.

The invention provides a continuous zooming optical system with heat elimination and wide pressure adaptability, and solves the problem that an existing optical system cannot realize passive compensation of temperature and air pressure changes at the same time. The system comprises a front fixed lens group, a zoom lens group, a diaphragm, a middle fixed lens group, a compensation lens group, a rear fixed lens group and an optical filter which are sequentially and coaxially arranged along the light propagation direction; the front fixed lens group comprises a first positive lens, a first negative lens, a second positive lens, a third positive lens, a second negative lens and a fourth positive lens which are sequentially arranged; the zoom lens group comprises a first glued lens group with negative focal power and a fourth negative lens which are arranged in sequence; the middle fixed lens group comprises a sixth positive lens, a seventh positive lens and a fifth negative lens which arearranged in sequence; the compensation lens group comprises a second glued lens group with negative focal power; the rear fixed lens group comprises a seventh negative lens and a ninth positive lens which are sequentially arranged from left to right; and the zoom lens group and the compensation lens group can synchronously move back and forth along the optical axis direction to realize continuouszooming.

A light source device (3) is provided with an LED (4) having strong directivity, a reflective hood (7) which has an interior reflecting surface for reflecting the illumination light from the light source, and a pair of first and second polarizing reflective plates (9A, 9B) for polarizing the illumination light from the LED (4) in a specific direction. The first and second polarizing reflective plates (9A, 9B) have a specific length and width, and a back surface formed from a high reflectance plate. The light source (4) is secured to the reflective hood (7). A specific interval is provided between the first and second polarizing reflective plates (9A, 9B) and the reflecting surface of the reflective hood, and a specific interval is provided between the two plates with the optical axis passing through the 0 DEG direction angle of the light source (4) in between. That is to say, the respective designated angles alfa of inclination are formed with respect to the optical axis so that the interval in the vicinity of the light source is large, and the interval further away is small.

The present invention provides an illumination device including a cylindrical light source and a curved mirror for reflecting light radiated from the cylindrical light source, wherein the curved mirror has a light reflection surface which has a shape of a portion of an elliptic curve having a first focal point and a second focal point on a reference axis of the curved surface, in a cross-sectional surface perpendicular to the axial direction of the light source, and the cylindrical light source is disposed on the reference axis at a position between the first focal point and the second focal point, a light irradiation apparatus including the illumination device, and a method for producing a photoreaction product sheet using the irradiation apparatus.

The objective of the invention is to provide a substrate inspection device capable of clearly imaging the pattern on a substrate. An imaging head 10 is equipped with a CCD line sensor 20, six first illumination means 30 and a pair of second illumination means 40. The second illumination means 40 are arranged on both sides of the LED arranging direction in the first illumination means 30 so that the irradiation angle of the lights emitted from the second illumination means 40 to the surface of the substrate when the lights emitted from the second illumination means 40 are projected on a reference plane abcd is different from the irradiation angle to the surface of the substrate of the lights emitted from the first illumination means 30 when the lights emitted from the first illumination means are projected on the reference plane abcd.

The application discloses an optical module and a light source module. The optical module includes a total internal reflector and a convex lens; the convex lens is positioned in front of the total internal reflector along the optical axis; the total internal reflector includes a light source cavity; the light source cavity is used for covering an LED; the total internal reflector is used for converging light entering from the light source cavity and casting the light into the convex lens; the convex lens is used for collimating light that enters the total internal reflector. The light source module includes the LED and the optical module; the LED is covered by the light source cavity. The optical module and the light source module disclosed in the embodiment enable illuminance in a key area to be more evenly distributed, side spots can be effectively eliminated, and lighting effect is improved.

An LED lighting device includes a plurality of LED chips and a pair of side mounting faces. The distance between the side mounting faces becomes smaller from the base side toward the extremity side in the x direction. The side mounting faces face mutually opposite sides in the y direction. Also, the distance between the side mounting faces becomes shorter from the back side toward the front side in the z direction that is perpendicular to both the x direction and the y direction. The plurality of LED chips include LED chips mounted on the pair of side mounting faces. The LED lighting device illuminates an illumination target with a uniform illuminance distribution.

The invention discloses a brightness enhancement film and a backlight module. The brightness enhancement film comprises a light transmission substrate, a plurality of lenses and a reflection layer. The light transmission substrate is provided with a first surface and a second surface which are opposite. The lenses are collocated on the first surface, wherein each lens is provided with a bent convex side back to the light transmission substrate. The curvature radius of the bent convex side in the first direction parallel to the first surface is R1, the curvature radius of the bent convex side in the second direction parallel to the first surface is R2, and the R1 is not equal to the R2. The reflection layer is collocated on the second surface, wherein the reflection layer is provided with a plurality of light transmission open pores, and the light transmission open pores are positioned on the optical axes of the lenses respectively. The distance between the vertex of the bent convex side of the lens and the corresponding light transmission open pore is L, the refractive indexes of the lenses are n, and the brightness enhancement film satisfies the conditions that L is less than nR1 / (n-1) and L is less than nR2 / (n-1). The backlight module using the brightness enhancement film is also provided.

The invention provides a projection display that achieves continuous light amount control with ease and without causing unevenness of illumination of light applied to a light valve responsive to a video signal, thereby allowing constant image display with satisfactory contrast. The projection display of the invention includes a light valve (2); a light source (3a) generating light applied to the light valve (2); an integrator lens (4) provided on an optical path between the light source (3a) and the light valve (2) and making uniform the illumination distribution of light applied from the light source (3a) to the light valve (2); and a light amount control system (9) provided on the optical path and including a turning mechanism (9a) which turns like a set of double doors in order to adjust the amount of light applied from the light source (3a) to the light valve (2). The turning mechanism (9a) is bent into a V shape in a direction to reduce the amount of light (to block the light).