461results about How to "Good collimation" patented technology

Light incoupling structures for lighting applications, such as lightguides. The incoupling structures include an optically substantially transparent medium for transporting light emitted by a light source and an optical element including at least one hole in the medium for coupling light together with optional further optical elements. A lighting element includes a light source with related integrated optics.

Method/system locate external articles using source, detector (PSD), entrance aperture, and magnifying/reducing afocal element—expanding FOR>90°, or refining precision. Between (1) source or detector and (2) aperture, at least one plural-axis-rotatable mirror addresses source/detector throughout FOR. ½- to 15-centimeter mirror enables ˜25 to ˜45 μradian beam divergence. Aperture, afocal element, and mirror(s) define source-detector path. Mirror(s) rotate in refractory- (or air/magnetic-) bearing mount; or mirror array. Auxiliary optics illuminate mirror back, monitoring return to measure (null-balance feedback) angle. To optimize imaging, auxiliary radiation propagates via splitters toward array (paralleling measurement paths), then focusing on imaging detector. Focal quality is developed as a PSF, optimized vs. angle; stored results later recover optima. Mirror drive uses magnet(s) on mirror(s). “Piston” motion yields in-phase wavefronts, so array dimensions set diffraction limit. Also: destructive reply; scaling optimizes acceleration vs. thickness; passive systems.

The invention discloses an indoor full-automatic BRDF (bidirectional reflectance distribution function) measurement device. The device comprises a support panel, a support platform is provided with a horizontal turntable, a sample table is mounted in a central through hole of the horizontal turntable, the horizontal turntable is equipped with a lens bracket on which a lens rotary arm is arranged,a lens rotary arm end is equipped with a spectrograph lens, an optical axis of the spectrograph lens always points to the centre of the sample table, the support platform is further equipped with an optical source guide rail on which an artificial optical source is arranged, the artificial optical source always points to the centre of the sample table. The BRDF measurement device can effectively improve the positioning precision, reduces the measurement period, and improves the optical source collimation and uniformity so as to effectively guarantee the measurement precision.

The invention provides an illumination device (1) comprising a lighting unit (2). The lighting unit (2) comprises a light source (100) and a substantially flat light guide (200), arranged to collimate light source light (111). The light guide (200) has an entrance window (210), an edge window (220), a first light guide surface (201), a second light guide surface (202), a first side edge (230) and a second side edge (240). One or more of the first light guide surface (201) and the second light guide surface (202) comprise a plurality of grooves (300). In this way, latitudinal collimation is obtained.

When any observer receives an image of a scene having the same relative size, shape and location on the retina of each of his two eyes at any instant and the image of the scene has some component of horizontal motion in any direction, the image viewed is three dimensional. If the motion occurs, all scene-object points are spatially located in playback since all of the original ray angles between camera and scene points are reproduced for both eyes by the ray cross-overs at the scene image points. When successive frames are presented, the brain cognizes the motion in linking the frames by persistence of vision. For the brain to perceive an item as moving it must connect these frames, but because of intersecting rays coming from any spatial location in successive frames, the brain cannot connect the frames without also locating the points in space.

A planar light source module including a light guide plate (LGP), a light source, an optical film, and a reflector is provided. The light source for emitting a light beam is disposed adjacent to the side light-incident surface, wherein the light beam enters the LGP from a side light-incident surface and leaves the LGP from a light-emergence surface in an emergence angle θ1, θ1≧70 degrees. The optical film is disposed above the LGP to collimate the light beam from the LGP. The optical film includes a prism layer module and a bonding layer module stacked alternately. The prism layer module comprises prism layers and each prism layer includes micro-prisms. The bonding layer module comprises at least one bonding layer bonded with two prism layers adjacent thereto. The refraction index of the prism layers is greater than that of the bonding layer. The reflector is disposed under the bottom surface.

Discussed are a color filter using a surface plasmon, a liquid crystal display (LCD) device and a method for fabricating the same, capable of enhancing a transmittance rate of an LC panel, by forming a transmissive pattern having a plurality of sub-wavelength holes having a period at a metal layer so that light of a specific wavelength can be selectively transmitted, and capable of simplifying the entire processed.

The invention discloses a collimating and beam expanding device for semiconductor laser sources of a laser radar. The collimating and beam expanding device is mainly composed of an aspherical lens, a quartz positive lens, a tunable flange and the like. The collimating and beam expanding device is simple in structure, low in cost and good in beam collimation performance, a divergence angle of a semiconductor laser is compressed from 0.2X0.4rad to below 0.2mrad, and the requirement of the laser radar for probing light sources is met; the device is stable in optical and mechanical properties, can be used under level-18 random vibration at the environment temperature from minus 30 DEG C to minus 50 DEG C, and meets the requirement of the laser radar on stability in bad conditions; the device is provided with the flange, semiconductor laser sources different in divergence angle can be obtained by fine tuning of the flange of the beam expanding device; by tuning of the flange, the device can also be applied to beam collimation of other different-wavelength light sources.

The present invention belongs to the field of gas detecting technology. The methane concentration detecting method includes using light source in certain spectrum range and resonance cavity with two high reflectivity inner surfaces; detecting the light from the light source and through the detected gas and the resonance cavity; regulating the length of the resonance cavity to detect the maximum light strength and the minimum light strength; and calculating the methane concentration with the formula. The detecting device includes LED light source, collimating lens, converging lens, Fabry-Perot etalon, detection system, computer, and signal generator. The present invention has low cost, convenient optical path collimation and high sensitivity.

A backlight (10) includes a front and back reflectors (12,14) forming a light recycling cavity (16) and one or more light source members (24a, 24b, 24c) disposed to emit light into the light recycling cavity. The front reflector (12) being partially reflective to provide an output illumination area. The front reflector (12) has a blue sloped transmission spectra, at normal incidence with a range among bin values from 15% to 100%.

The invention belongs to the technical field of the low-cost preparation of high-performance composite materials and relates to a gradient prepreg having an air guiding function in layer and good process operability and a preparation method of the gradient prepreg. The compound technology parameters in a prepreg preparation process are regulated and controlled, the dipping degree of resin to dry fibers is controlled, the resin is symmetrically distributed in a gradient manner in the middle layer in the thickness direction of the prepreg, the fiber is infiltrated, meanwhile, an air exhaust channel is pre-formed in a prepreg layer, and the gradient prepreg with an air guiding passage in layer can be prepared; the gradient prepreg can be formed and solidified by an out-of-autoclave process, and the forming process cost of the composite material parts can be greatly reduced.

The invention discloses an electric field aided silicon through hole etching process. The process comprises the following steps of (1) spinning a photoresist on a monocrystalline wafer and performing optical lithography or electron-beam lithography to obtain a photoresist pattern; (2) plating a silver film or a golden film; (3) in an electric field, taking a mixed solution of HF, H2O2 and deionized water as an etching agent to perform metal catalytic etching; (4) removing the photoresist; and (5) removing the residual metal film on the monocrystalline wafer and cleaning the monocrystalline wafer. Through hole structures with various micro nanometer sizes from tens of nanometer to hundreds of nanometer are formed by controlling the strength of the electric field in the etching process.

The invention discloses an indoor laser positioning system based on a frequency labeling method. A frequency label algorithm module is used for completing demodulation conducted on modulated lasers emitted by a positioning light source and determining the position of a positioning terminal according to the correspondence between the laser frequency and the position coordinates of the area to be positioned. The positioning light source modulates and emits a laser bundle array so that laser light spots with different frequency labels can be formed in positions to be positioned to be detected and processed through a positioning terminal. The positioning terminal receives the lasers which are emitted by the positioning light source and have different frequencies, captures frequency information of the lasers after filtering, photovoltaic conversion and A/D conversion are conducted, and achieves positioning through the frequency label algorithm. Due to the fact that the lasers serve as carrier waves of signals, reliable and stable positioning service can be easily provided; due to the adoption of the frequency labeling method, the position is determined according to the frequency of laser modulation light received by the positioning terminal; the positioning accuracy of the light spots generated by the positioning light source reaches the centimeter level; hardware implementation and conversion are easily achieved so that the product can be popularized and used.

The invention discloses a beam-expanding collimating optical system and a preparation method thereof. The optical system comprises a front transmission beam-expanding collimation group and a rear reflection beam-expanding collimation group. According to a light incident direction, the transmission beam-expanding collimation group includes a bi-concave negative lens, a bi-convex positive lens, and two meniscus positive lenses; and the curvatures of the two meniscus positive lenses bend to the light incident direction. The reflection beam-expanding collimation group contains two paraboloid mirrors having identical focus positions; and the two paraboloid mirrors are the small-caliber paraboloid mirror and the large-caliber paraboloid mirror and the surface of the large-caliber paraboloid mirror is an off-axis concave surface. According to the collimating optical system, collimation and beam expanding can be provided for a laser with any laser wavelength in a broadband range or white laser and no moving compensation component is needed. The system has advantages of compact structure, small size, high beam-expanding multiplying power, and excellent collimation performance. The system can be applied to fields of holographic imaging, optical test, and laser radar and the like.

The invention provides a CT (computed tomography) machine and an X-ray collimator thereof. A good collimation effect can be realized. The X-ray collimator comprises a plurality of first plates and second plates. The first plates and the second plates respectively peripherally and axially extend on the CT machine and are spliced with one another, a through hole is formed by each two adjacent first plates and the two corresponding adjacent second plates in an enclosed manner, and extension lines of various side walls of each through hole intersect with one another at a focal point of an X-ray source, so that X-rays can conveniently linearly penetrate the through holes. The CT machine and the X-ray collimator have the advantages that the extension lines of the various side walls of each through hole intersect with one another at the focal point of the X-ray source, the through holes are perforated in extension directions of the various X-rays corresponding to the through holes, accordingly, the X-rays emitted from the focal point of the X-ray source can linearly penetrate the through holes and finally reach a detection unit of an X-ray detector without being blocked, and the good collimation effect can be realized; scattered light rays can be absorbed and blocked by the side walls of the through holes, so that interference of the scattered light rays on the X-rays positioned in the through holes can be prevented, an anti-scattering effect can be improved, and the detection precision can be enhanced.