10results about How to "Good collimation" patented technology

Collimating superlenses and their design methods, and collimation systems based on collimating superlenses, are disclosed. The collimation system includes a VCSEL array and a collimating superlens array. The VCSEL array comprises several VCSEL units; the collimating superlens array comprises several collimating superlenses, which are arranged in a one-to-one correspondence with the VCSEL units to collimate the emitted beams of the VCSEL units. The collimating superlenses are composed of amorphous silicon cylinders of different radii, the radius of each amorphous silicon cylinder being determined according to the position and phase of each position of the collimating superlens, so that the amorphous silicon cylinders of different radii are arranged according to the position and phase distribution of the collimating superlenses. By employing a collimating superlens design method with a specific phase distribution, the limitations of traditional curvature radius processing are overcome. The arrangement of amorphous silicon cylinders with specific radius dimensions replaces the curved surface distribution of traditional optical convex lenses, and collimation performance is improved based on high-precision micro / nano fabrication technology.

The utility model discloses a Si packaging substrate with a light reflection structure and a light absorption structure, comprising a silicon-based substrate, the end face of which is provided with a plurality of grooves in an array manner, and the longitudinal section of each groove is V-shaped; the LED chip is positioned on the bottom surface of the groove through conductive solder, the light-emitting surface of the LED chip faces outwards, and the light conversion layer covers the light-emitting surface; the reflecting layer is arranged on the wedge-shaped side face of the groove and extends to the end face of the silicon-based substrate, and a passivation layer is arranged on the surface of the reflecting layer and / or between the surface of the reflecting layer and the end face of the silicon-based substrate; and the light absorption enclosing wall is arranged on the passivation layer on the outer side of the top of the groove and is of a continuous strip-shaped structure. The array micro light source can solve the problems of poor light utilization rate, poor light collimation performance and poor light crosstalk prevention performance when the existing array micro light source is used.

The application discloses a kind of laser speckle suppression device and method, belong to optical technology field, by laser light source, collimating lens, half-transmission half-reflection mirror, light splitting film layer array, detector is formed, laser light source output coherent laser;Collimating lens is collimated after laser beam, again by half-transmission half-reflection mirror vertical injection light splitting film layer array;Light splitting film layer array will incident beam be divided into multiple non-coherent and light intensity equal sub-beam.The present application is static speckle suppression device, does not need power supply and drive, device structure is compact, small in size, low energy consumption, long service life;This device structure is simple, and the effect of speckle suppression is good, can be divided into N beam light intensity equal non-coherent light for laser beam, at most the speckle contrast of laser is reduced to 1 / N of original 1 / 2 .

The invention discloses a metasurface integrated Micro-LED structure with light beam shaping and light extraction enhancing functions, the structure comprises a Micro-LED chip and a single-layer metasurface structure directly integrated on the light emitting surface of the Micro-LED chip, and the metasurface is composed of a plurality of sub-wavelength nano units arranged in a two-dimensional array. Wherein the sizes and the space periods of the nano units are cooperatively designed according to the light-emitting center wavelength of the Micro-LED, the distance from a light-emitting layer in the chip to a light-emitting surface and a preset deflection angle of a light beam, so that phase delay values introduced by the units jointly form a composite two-dimensional phase distribution. According to the phase distribution, firstly, divergent spherical wavefront is reconstructed into collimated wavefront by compensating an optical path difference so as to enhance light extraction, and secondly, a linear phase gradient is superposed so that an optical axis of a whole outgoing beam generates a preset deflection angle. According to the invention, the functions of a complex optical system are integrated on a chip layer, and the integration of efficient collimation, directional emission and light extraction enhancement of light beams is realized.

This invention provides a desktop small-angle X-ray scattering device, including a base plate. Two sets of translation tracks are fixedly connected to the top surface of the base plate. A detector assembly and a sample stage assembly are respectively installed at both ends of the translation track surface. A radiation assembly is installed on the top surface of the base plate at one end of the translation track. The radiation assembly includes a light source support. A light source support is fixedly connected to the top surface of the base plate at one end of the translation track. A light source is fixedly connected to the upper part of one side of the light source support. A connecting plate is fixedly connected to the middle of one side of the light source. A light source hole is provided in the middle of one side of the connecting plate. A filter unit is fixedly connected inside the light source hole. A collimator is fixedly connected to one side of the connecting plate. This invention enables small-angle experimental testing through the cooperation of the translation tracks, detector assembly, sample stage assembly, and radiation assembly.

The utility model belongs to the technical field of high-energy particle acceleration, and relates to an ion beam generation system based on interaction of laser and a disc target, which comprises a laser source, a modulation target and a vacuum target chamber, the modulation target is a disc-shaped solid target and is arranged in the vacuum target chamber; the laser source is arranged outside the vacuum target chamber and serves as an input end, and laser generated by the laser source is emitted into the modulation target, interacts with the modulation target and then is emitted out to generate an ion beam; the laser source is used for generating circularly polarized femtosecond Laguerre-Gaussian laser; the femtosecond Laguerre-Gaussian laser has hollow transverse field distribution and longitudinal field distribution with the field intensity larger than 1022 W / cm < 2 >. According to the invention, the energy conversion efficiency from laser to ions can be improved, the collimation and the monoenergy of the ion beam are improved, and the maximum cut-off energy and the peak energy of the ions are improved.

The utility model relates to the technical field of vehicle illumination detection, and discloses an automobile dipped headlight downward inclination angle measuring device, which comprises a base, a measuring unit is arranged on the base, the measuring unit comprises a laser emitting module and an image acquisition module, the laser emitting module emits laser and forms a reference light spot, and the image acquisition module acquires the reference light spot. The image acquisition module acquires the reference light spot and the test light spot and forms image data, and the algorithm module can receive the image data sent by the image acquisition module and analyze and calculate the inclination angle. Interference factors such as asthenopia and subjective cognitive differences of manual observation are eliminated, and objectivity and accuracy of measurement results are remarkably improved. And the environmental adaptability and practicability of the device are improved. The equipment maintenance time and labor cost are reduced, and the economic burden of an enterprise is relieved.

The application relates to a 360-degree scanning laser radar optical system and a design method thereof, the system comprising a laser, a converging module, a MEMS mirror, a detector and a free-form surface lens, the free-form surface lens comprising a refractive surface, a first reflecting surface and a second reflecting surface; a light beam emitted by the laser is incident to the MEMS mirror through the converging module, and is reflected to the refractive surface through the MEMS mirror, the second reflecting surface and the first reflecting surface in sequence, and after being refracted through the refractive surface, the light beam forms a parallel light beam to be incident to a target object to be diffusely reflected, part of light rays in the diffusely reflected light rays return to the detector along the original path, the detector receives the light beam and obtains the position of the target object; the MEMS mirror rotates around the central axis of the free-form surface lens by 360 degrees to scan the target object by 360 degrees. The system adopts a solid free-form surface lens, is compact in size, has few optical system elements, is simple in structure, convenient to assemble and adjust and light in weight; the application has good collimation of an outgoing light beam and high radar resolution.

The invention discloses a small-size coaxial transmit-receive optical module, which is used for a laser radar, and comprises a transmitting light path assembly, a beam combination light path coupling assembly and a receiving light path assembly, beam combination is carried out by using a polarization state, and a light path of the transmitting light path assembly can obtain a smaller emergent light spot, so that the receiving light path assembly has a larger receiving aperture equivalently; the system detection capability is improved; meanwhile, the beam combining module can further improve the integration level through gluing and integrated coating and is convenient to install; the receiving light path assembly adopts a U-shaped folding structure and a telecentric light path design, long-focus receiving can be realized under a relatively short physical size, an incident angle CRA of a main light ray is controlled in a relatively small range, inclined projection of a light spot on a photosensitive target surface of a detector is relatively small, response convergence is relatively good, and meanwhile, high integration level and high receiving efficiency are taken into consideration.

This invention discloses a method for detecting microcrack defects on a mirror surface. First, the height information of the surface being measured is pre-scanned and converted into corresponding angle information. Referring to the reflection characteristics of the mirror, a specially customized, angle-adjustable illumination system is used to project incident light at different angles. This light has high collimation and strong light-gathering ability, thereby enhancing the reflected light from the background area and suppressing the reflected light from the microcrack area. The light reflected from the surface enters a custom-designed imaging system, which can only receive reflected light within a certain fixed angle range. At this point, the light is filtered by the fixed light of the optical imaging system, which further increases the grayscale contrast between the microcrack defect features and the background, achieving a double effect of expanding the boundary of the micro-features, and achieving a microcrack defect detection accuracy of 1 / 5 to 1 / 10 of a pixel.