10099 results about "Light spot" patented technology

The invention comprises, in one form thereof, a surgical headlight having a hybrid design wherein a first low power light source, such as a LED is fixed to a headband such that the surgical headlight is untethered. The surgical headlight further comprises a coupling means that allows for subsequent tethering to a high power light source, such as a fiber-optic light source. The device allows the surgeon to project a spot of light where he needs it, and the ability to plug into a more powerful light source, such as a fiber optic light source, to thereby boost the light to levels that may be required over and above what the low power light source, such as a LED is capable of producing alone.

Devices, systems, and methods measure, diagnose, and/or treat one or both eyes of a patient. Adaptive optics systems (such as those having a deformable mirror) may be configured to an aspherical or multi-spherical presbyopia-mitigating prescriptive shape to allow objective and/or subjective measurements of a candidate prescription. A plurality of viewing distances allow subjective and/or objective evaluations of performance using a light spot or a test viewing image. Measurements of aberrations at selected viewing conditions (including distances and/or brightness) with correlating pupil sizes may also be provided.

The present invention refers to a Laser therapy system and a method for skin treatment, comprising:

• • a unit for dispensing a Photosensitizer containing agent;
  • a first light source which generates at least one first light with a first wavelength;
  • a second light source as a Laser light source which generates at least a second light with a second wavelength;
  • an optical system which is connected to the first and to the second light source, comprising an electromechanical displacement device with an optical deflection and focusing system such that the first and second light gets focused and a respective focus point can be controllably positioned in the skin; and
  • a control unit for controlling the electromechanical displacement device and the first and the second light source such that the respective light spot with a controlled energy and position in the skin is produced.

A sequential wavefront sensor comprises a light beam scanning module, a sub-wavefront focusing lens, a detector with more than one photosensitive area and a processor for calculating the sequentially obtained centroids of a number focused light spots from the sub-wavefronts to determine the aberration of the input wavefront. A sequential wavefront sensing method comprises the steps of; sequentially projecting a number of sub-wavefronts onto a sub-wavefront focusing lens and a detector with more than one photosensitive areas, calculating the centroid of the focused light spot from each sub-wavefront, and processing the centroid information to determine the aberration of the wavefront. In particular, a method for auto-focusing and/or auto-astigmatism-correction comprises the steps of sequentially projecting a number of sub-wavefronts around an annular ring of a wavefront to a sub-wavefront focusing lens and a detector, calculating the centroid of focused light spot from each sub-wavefront to figure out the centroid trace and hence the defocus and/or astigmatism, adjusting the focus and/or astigmatism of the optical imaging system before the wavefront sensor so that the measured defocus and/or astigmatism is minimized.

An apeture mechanism that utilizes translucent, transparent or colored blades to modify the output beam of a lighting device is provided. A conventional apeture mechanism having replacement blades formed of a diffusion screen provides a control assembly that, when placed in front of the output beam of a lighting device, allows the user to selectively control the beam between a spot and a flood pattern. Further, the blades may be formed of translucent or transparent colored filter material to alter the color of the output beam. The apeture mechanism may be incorporated into compact lighting devices such as flashlights, architectural lighting devices or other accessories for use in conjunction with these lighting devices.

A display apparatus has a plurality unit pixels each divided into a least three sub-pixels for displaying a halftone. The at least three sub-pixels have mutually different areas, so that one sub-pixel among the at least three sub-pixels has a maximum area which does not exceed a total area of the remaining sub-pixels. As a result, it is possible to obviate a so-called linear defect occurring in a multi-level gradational display by suppressing the shift of gravity center of light spots and change in sub-pixel arrangement pattern in displaying slightly different gradation levels.

The invention provides a galvanometer system correction device and a correction method thereof, and relates to the technical field of precision laser processing equipment. A honeycomb panel is arranged in the middle of the outer frame of a bearing platform, a base plate for corrective is absorbed on the honeycomb panel, and the vacuum chamber of the honeycomb panel is connected with a dust collector; a PSD sensor for measuring the actual output light spot center position of the laser of a galvanometer system is arranged on the vacuum absorption bearing platform; a CCD image acquisition device is arranged above the base plate for correcting, and then is provided with a light intensity regulating module and an image acquisition board card; and a visual measurement algorithm module is arranged. The invention can effectively inhibit the precision drift of the galvanometer system, improve the efficiency of the galvanometer system when in correction model updating and in real-time correction calculation operation, improve the automatic degree of equipment, reduce the labor intensity of an operator, greatly improve the processing precision of equipment, product quality and production efficiency, has simple structure and unique principle and method, and is particularly suitable for precision laser processing equipment to use.

An apparatus for measuring optical aberrations of the human eye wherein the person positions his or her eye on an optical axis of the apparatus and looks at an illuminated target on the optical axis that is visible to the eye for allowing the eye to focus on the target and establish a position of the eye. A collimating lens on the optical axis is movable along the optical axis for adjusting the apparent optical distance between the eye and the target. A light source directs a predetermined light beam along the optical axis into the eye and onto the retina of the eye as a spot of light. A lens reimages the light scattered from the light spot on the eye retina into a wavefront curvature sensor that forms two oppositely defocused images on an image detector, and a computer processes and analyzes the two defocused images for measuring the optical aberrations of the eye.

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.

The present invention relates to a headlamp for vehicles with a plurality of LED light sources combined into a single light-emitting surface, where an optical unit is allocated to at least one LED light source to generate some of a specified light distribution, where one or several LED light sources can be turned on or off such that the light distribution can be modified, where a first optical unit with first projection characteristics is placed before a first group of LED light sources and a second optical unit with second projection characteristics is placed before a second group of LED light sources such that a number of differently sized light spots can be generated in the traffic space by optionally turning on or off or dimming the LED light sources of the first group of LED light sources or the second group of LED light sources.

An apparatus for lighting or illuminating spaces, bodies or surfaces, which is formed from a plurality of light emitting diodes (1). The light emitting diodes (1) are radially enclosed by a casing body (14) which is adjoined at the end by a tubular element (15) which bears against a lens (4). A set spacing is thereby established between the light emitting diode (1) and the lens (4). All light spots issuing from the light emitting diode (1) are projected to form a single light spot of a high level of brightness by virtue of the superimposed relationship at a spacing in front of the lens (4).

The invention discloses a liquid crystal display panel, comprising a first substrate, a second substrate and a liquid crystal layer, wherein, the liquid crystal layer is arranged between the first substrate and the second substrate; the first substrate comprises a bottom material, an alignment film and a plurality of retaining walls; the bottom material is defined with a display area and a surrounding non-display area, the alignment film is arranged in the display area; the plurality of retaining walls are arranged in the surrounding non-display area; moreover, the heights of the plurality of retaining walls are greater than the height of the alignment film; a pollution source is blocked outside of the display area by the retaining walls after the friction alignment action of the alignment film, thereby preventing the pollution source from falling into the display area and avoiding the display detects such as group gray spots or light spots of the liquid crystal display panel. Therefore, the display quality and the practicability of the liquid crystal display panel are greatly improved.

An optical scanner includes a light source modulated based on image data, an optical deflection and scanning part deflecting a light beam emitted from the light source, and a scanning and imaging optical system condensing the deflected light beam toward a scanning surface so as to form a light spot optically scanning the scanning surface. The effective scanning region of the scanning surface is divided into a plurality of regions according to a scanning line curving characteristic. Suitable image data for optically scanning the divided regions are selected from image data of a plurality of image lines every time the light spot optically scans the effective scanning region, so that the image data of each of the image lines is written with scanning line curving being corrected.

The invention discloses a laser link communication-measurement composite system. Through adoption of the laser link communication-measurement composite system, the payload weight, size and power consumption can be lowered. The laser link communication-measurement composite system is implemented by the following technical scheme: an optical antenna transmits a comprehensive optical signal to a rapid reflecting mirror through an eye lens at a transmitting end; reflected light splits a light beam of the comprehensive optical signal into two paths through a beam splitter; one path is transmitted into another beam splitter through the beam splitter to transmit the light beam into a coarse tracking module in order to extract a target position coarse miss distance, and a control voltage is applied to a two-dimensional turntable according to an embedded control algorithm; the other path of comprehensive optical signal is introduced into the field range of a fine tracking module through the beam splitter, and transmitted into the fine tracking module to extract a target position fine miss distance, the overall offset of fine field light spots is controlled, the light spots are introduced into the center of a fine tracking field to obtain target angle information, and the extracted target position fine miss distance is transmitted into a ground/satellite platform comprehensive electronic management and processing module to finish target capture and an aiming function and establish a communication link.

An optical scanning device includes a first optical element that converts a cross-section shape of a light beam from a semiconductor laser to a desired shape; a second optical element that guides the light beam output from the first optical element to an optical deflector that deflects the light beam; and a third optical element that gathers the light beam deflected by the optical deflector onto a surface to be scanned to form a light spot thereby optically scanning the surface. At least one of the first optical element, the second optical element, and the third optical element includes a resin-made lens, at least one of the resin-made lenses has a power diffracting surface, and a surface shape of at least one of power diffracting surfaces is formed so that a power of a diffracting portion and a power of a refractive portion are cancelled out.

The invention provides a measuring device and method for the target line-of-sight angel offset and distance. The device is composed of a four-quadrant avalanche photodetector, a receiving and sending optical unit, a noise compensation circuit, a four-circuit front amplification circuit, a video amplification circuit, an automatic gain amplification circuit, a peak keeping circuit, an AD conversion circuit, a laser, a dominant wave sampling circuit, a summing circuit, a time identifying circuit, a time test circuit and a digital processing circuit, wherein the receiving and sending optical unit enables narrow pulse laser rays emitted by the laser to be converged on the photoelectric detector to form echo light spots after target reflection, photovoltaic conversion of the four-quadrant avalanche photodetector, front amplification, video amplification and automatic gain amplification are conducted, narrow-pulse peak keeping is conducted, transmission of the AD conversion circuit is conducted, and the digital processing circuit extracts the digital line-of-sight angel offset; summing is conducted on the four-circuit front amplification circuit, the dominant wave sampling circuit is combined, the time identifying circuit determines laser emitting and echo coming and returning time, the time is transmitted to the time identifying circuit to be measured, and the digital processing circuit decodes the corresponding distance.

A fluorescence-like light emitting diode (LED) illumination unit is provided, which includes a radiator, an LED substrate fixed on the radiator, and multiple LED illuminants encapsulated on the LED substrate. A first surface of the radiator is in the shape of a paraboloid with reflective effect. A bar-shaped convex lens with radial converging effect is disposed in the space surrounded by the paraboloid. The bar-shaped convex lens is located in front of the multiple LED illuminants and radially converges part of light rays emitted by the multiple LED illuminants but axially diffuses them. The illumination unit completely solves the problems such as exposure of spotted light sources, small irradiation angle of a light path, beaded light spots of the LED light sources as the lamp illuminant, visual dizziness caused by multiple projections formed by irradiating an irradiated object with a multi-point light source, dazzling light rays, and the like in an existing LED illumination lamp. The illumination unit emits more uniform and soft light rays, with a higher brightness in an irradiated region and a light emitting mode which is basically not different from that of a conventional daylight lamp, and meets the long-term using habit and approval of people. Various applications of the fluorescence-like LED illumination unit are further provided.

A method for determining three-dimensional coordinates of an object point on a surface of an object, the method including steps of: providing a source, a projector, and a camera; in each of two instances: spatially modulating source light; sending a modulator pattern of light through the projector lens to form light spots; filtering the spots with a pinhole plate; propagating light from the light spots onto the object to produce a fringe pattern; imaging the object point with a camera lens onto an array point of the photosensitive array to obtain first and second electrical data values from the photosensitive array; and determining the three-dimensional coordinates of the first object point based at least in part on the first electrical data value, the second electrical data value, and a baseline length.