80results 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.

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 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.

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.

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.

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 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.

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 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).

The invention discloses an illumination analog system in high-speed vehicle passenger room, comprising a computer, an IGBT light modulator and a lamp set which are in turn connected, and an illumination sensor that is connected with the input end of the computer, wherein the lamp set and the illumination sensor are installed in the vehicle passenger room. According to the control characteristic of the rapid change of the illumination, the system combines the bang-bang control and the fuzzy control, parallel connects the lamp sets and controls them in groups, and has uniform illumination distribution and small illumination error; besides, the invention can tracking control the illumination change in each passenger room and well satisfies the research of the high-speed train illumination change on the passenger comfortableness effect relationship. In the current adjusting method, the illumination rapid change is analogized and the anticipant illumination value is rapidly tracked via the actual illumination. The bang-bang control is used for controlling the rapid change of the illumination and the fuzzy control is used for adjusting the overshoot of the illumination so that the precise control of the illumination is realized and the robustness of the illumination control system is increased.