15 results about "Green laser" patented technology

The application provides a sample detection method, a detection device and a charged particle optical detection system. The sample detection method comprises the following steps: acquiring a surface topography image and cathodoluminescence data of a to-be-detected sample having a dark spot defect; extracting a region in which the cathodoluminescence intensity is lower than a set intensity threshold in each cathodoluminescence image to obtain a dark spot region; and determining failure information of the to-be-detected sample based on the surface topography image, the dark spot region, the corresponding electrical stress of the dark spot region and the corresponding time of the dark spot region. Through the application, dynamic defect detection of a blue-green laser chip is realized.

This application discloses a high-weld-resistance copper-chromium contact and its preparation method, belonging to the field of contact material technology. The preparation method includes: using high-purity electrolytic chromium powder and electrolytic copper powder as raw materials, mixing them via acoustic resonance, and then sequentially passing them through powder pressing and cold isostatic pressing to obtain a blank; subjecting the blank to gradient sintering and finishing to obtain a copper-chromium electrode rod; then atomizing the copper-chromium electrode rod to obtain copper-chromium alloy powder; sequentially passing the copper-chromium alloy powder through cladding, heat treatment, sealing welding, and hot isostatic pressing sintering, and then removing the cladding to obtain a preform; after processing the preform, remelting the surface with a green laser to obtain a high-weld-resistance copper-chromium contact. This method improves the purity of the copper-chromium contact and optimizes the morphology and distribution of chromium particles, resulting in a contact with high purity, fine and uniformly distributed chromium particles, excellent weld resistance and breaking performance, suitable for high-voltage arc-extinguishing chambers.

This invention discloses a PCB board with fine lines and its preparation method, relating to the field of PCB processing. The preparation method includes preparing a copper-clad laminate with a hydrocarbon resin substrate; using a UV laser with a wavelength of 315-400 nm to etch away copper foil to form circuit patterns; using a CO2 or green laser to remove the substrate to process holes; and cleaning, wet desmearing, shadowing, dry lamination, and electroplating the copper-clad laminate to obtain the PCB board. This application uses a UV laser to remove the copper foil on the surface of the copper-clad laminate to process circuit patterns without damaging the substrate, and utilizes a CO2 or green laser to remove the substrate to process holes. This enables ultra-fine circuit processing with a line width / spacing ≤15 μm, and the high etching factor and uniformity result in low resistance and heat loss. This method requires no chemically polluting reagents and does not use special materials, improving processing efficiency and quality while reducing production costs and environmental impact.

This invention discloses a slag volumetric flow rate measuring device and method. The slag volumetric flow rate measuring device includes: a binocular camera, with one camera on each side of the center of the slag discharge direction, and the two cameras arranged front and back in the slag discharge direction; a green laser source for emitting green laser lines; a red laser source for emitting red laser lines; one of the red and green laser lines is parallel to the slag discharge direction, and the other is perpendicular to the slag discharge direction; each camera of the binocular camera acquires a slag discharge image simultaneously displaying both green and red laser lines. This invention's measuring device uses two lasers (red and green) and a binocular camera. The cross-sectional area of ​​the slag on the conveyor belt is calculated using the R-channel image, and the displacement is calculated by cross-correlation using the matching results of two consecutive frames of the G-channel image. The conveyor belt speed is calculated by combining the sampling time, and the cross-sectional area and speed are coupled to achieve online detection of slag volumetric flow rate.

The present disclosure is related to an unmanned aerial vehicle-mounted continuous variable-frequency blue-green laser radar for water depth survey, including a blue-green light variable-frequency laser, a laser power supply driver, an encoding motor, a reflective optical wedge, a reflector, a big lens, a small lens, a balanced light detection module, a high-speed laser acquisition processor, an IMU module, an RTK module, a 4G module, a controller, a 4G antenna, a server, a mobile phone terminal and the like according to a characteristic that continuous variable-frequency blue-green laser generates frequency change when encountering a water surface and a water bottom, convolution and fast Fourier transform and a time-frequency correspondence. The laser radar is small in size, light in weight and suitable for an unmanned aerial vehicle to survey a water depth rapidly and precisely, achieves a millimeter-level precision, and realizes 0-10 m water depth survey.

The invention relates to a high-power green laser synthesis system based on a rotary frequency doubling crystal and multiple beams of infrared pulse laser, and belongs to the technical field of laser. The system comprises a multi-beam pulse infrared laser device, a frequency doubling crystal module, an annular rotating mechanism, a beam combining device, a continuous infrared laser device, a laser frequency regulation and control device and a rotating driving control system. The four beams of pulse infrared laser sources are symmetrically arranged along the circumferential edge, and periodically staggered output is realized through frequency regulation and control; the multiple frequency doubling crystals are distributed along the rotating circular ring at equal intervals and are sequentially aligned with laser pulses under driving of the rotating mechanism, and efficient frequency doubling is achieved. The center continuous infrared laser generates stable green light through frequency doubling of the fixed crystal. Finally, the green light generated by the multiple frequency doubling crystals and the central green light are integrated into a single light beam through a beam combining device to be output. According to the system, the power upper limit and the stability of green laser are remarkably improved through energy sharing of polycrystals, rotary dynamic matching and annular cooling, and the problems that existing green laser is limited in power and serious in heat effect are solved.

Methods and devices for driving a laser diode are disclosed herein. An example method includes a boost regulator outputting a maximum boost voltage to drive a laser diode that is configured to output light within a wavelength range of 495 nanometers (nm) to 570 nm. A boost servo may measure a laser voltage, and calculate a voltage difference between the two voltages. The servo may then compare the voltage difference to a drive voltage to determine an excess voltage, and may cause the boost regulator to output an optimum voltage based on the excess voltage. The boost servo may also calculate a low voltage to drive at least one additional component that is electrically coupled to the boost regulator when the laser diode is inactive; and may cause the boost regulator to output the low voltage to power the at least one additional component.

This utility model discloses a tooling for facilitating the machining of motor gear pressure plates, including a main tool body, three tool holders, a laser positioning assembly, and a dial. The roughing tool holder and the semi-finishing tool holder are welded and fixed to the main tool body. The finishing tool holder is installed by tool holder locking screws and its position is finely adjusted by opposing adjusting screws. Each tool holder is respectively equipped with a roughing insert, a semi-finishing insert, and a finishing insert. The laser positioning assembly includes a green laser emitter, a bracket, and a side pressure handle. The horizontal light emitted by the green laser emitter is parallel to the Z-axis of the machine tool and precisely passes through the tip of the finishing insert. The dial is located on the finishing tool holder. The axial misalignment of the three insert tips ensures sequential cutting. The advantages of this utility model are: machining is completed in a single clamping, significantly reducing the risk of deformation during the machining of thin-walled parts.

This application provides a green laser, which sequentially includes a pump source, a collimating lens, a focusing lens, a first cavity mirror, a gain medium, a Q-switching element, and a second cavity mirror in a first direction; sequentially includes a third cavity mirror and a displacement motor in a second direction; and sequentially includes a first beam splitter, a frequency doubling crystal, and a fourth cavity mirror in a third direction. The third cavity mirror is located behind the second cavity mirror in the second direction, and the first beam splitter is located behind the first cavity mirror in the third direction. This application achieves adjustable cavity length by moving the third cavity mirror in the second direction through the position of the displacement motor. This allows the green laser to achieve a cavity length suitable for different power outputs by adjusting the cavity length, enabling the same green laser to output multiple power stably and continuously. Therefore, a green laser with precisely adjustable cavity length, compatible with multiple high and low power overlapping stable outputs, high integration, and compact structure is obtained.

The application discloses a laser assembly and belongs to the technical field of optoelectronics. The laser assembly comprises a bottom plate, a heat sink and a plurality of light-emitting chips, wherein the plurality of light-emitting chips emit red laser, blue laser and green laser; at least one light-emitting chip comprises a first electrode, a light-emitting structure and a second electrode which are sequentially stacked in a direction away from the bottom plate, the first electrode is a P electrode, is laid on a surface of the light-emitting structure close to the bottom plate, and a surface of the first electrode away from the light-emitting structure is a convex-concave surface; at least one light-emitting chip is attached to a side of the corresponding heat sink away from the bottom plate, and a contact surface of the corresponding heat sink is the convex-concave surface of the P electrode, wherein the convex-concave surface comprises a plurality of recessed areas recessed in a direction away from the heat sink and a plurality of raised areas outside the plurality of recessed areas. The application solves the problem of poor heat conduction effect of the light-emitting chip in the laser assembly.

The present application relates to red chelae crayfish catching technical field, especially a kind of red chelae crayfish paddy field cultivation is used to catch shrimping device and method, including the laser lifting device, guide device and collection escape-proof device sequentially arranged along vertical direction, laser lifting device is inducted shrimping group by the green laser aperture of liftable adjustment;Guide device uses the four-prism platform gentle slope and U-shaped tube water flow with fishing net cover, guide shrimping group to climb, and make shrimps fall into collection area by the flipper triggered by shrimp body self-weight;Collection escape-proof device realizes no-escape collection by escape-proof board, one-way collection net cage and inverted whisk structure, the present application utilizes the photophobicity and top water habit of red chelae crayfish, realizes the full-process automation closed loop operation from "induction, guide, fall shrimps to collection", effectively solves the problems of traditional ground cage fishing, such as high labor intensity, low efficiency, high damage and serious escape, has the advantages of high efficiency, low damage and strong adaptability.

The utility model relates to a kind of green laser, comprising: resonant cavity, for generating non-polarization base frequency light;Frequency doubling unit, for the non-polarization base frequency light is output green laser after frequency doubling. Resonant cavity is provided with: narrowband high reflection fiber grating, second end is connected with the signal fiber of first pump combiner;First pump source, tail fiber is connected with the pump fiber of first pump combiner;First pump combiner, forward use;Multi-clad fiber, first end is connected with the output fiber of first pump combiner, second end is connected with the input fiber of second pump combiner;Second pump combiner, reverse use;Second pump source, tail fiber is connected with the pump fiber of second pump combiner;Narrowband low reflection uniform fiber grating, first end is connected with the output fiber of second pump source;Optical power stripper, input end is connected with the second end of narrowband low reflection uniform fiber grating;High-power output head. The utility model can output green laser, simple structure, low in cost.

The present invention relates to a single and / or dual laser delivery system attached to an existing ophthalmic operating microscope, comprising of a single and / or dual wavelength laser unit [1]; and a delivery system [5]. The laser unit [1] comprises of a green laser module 532 nm [3] and a yellow laser module 577 nm [4] along with an aiming beam [7] 635 nm. The delivery system comprises of a right-angle prism [5A]: X and Y Galvo assembly [5B] and a focusing lens assembly [5C]. The laser unit passes through a fiber optic cable [6] gets reflected using the right angle prism, gets deflected by the Galvo assembly, enters the focusing lens assembly and gets reflected by a folding mirror [5D] and focused on human eye capsule. The system converges and focuses the laser wavelengths in line with the aiming beam to create a circular pattern to accomplish a pre-measured Capsulorhexis.

The disclosure provides an extracorporeal frequency-doubling continuous deep ultraviolet laser device, a laser system and a semiconductor detection system. The device comprises an infrared laser module, a green laser module and a deep ultraviolet laser module. The infrared laser module is used to generate target continuous infrared laser; the green laser module comprises an infrared mirror assembly and a first conversion assembly, the infrared mirror assembly is used to convert the transmission light path of the target continuous infrared laser from a first red light path to a second red light path, and the first conversion assembly is used to perform multi-pass second harmonic conversion on the target continuous infrared laser to obtain target continuous green laser. The deep ultraviolet laser module comprises a green light mirror and a second conversion assembly, the green light mirror is used to convert the transmission light path of the target continuous green laser from a first green light path to a second green light path, and the second conversion assembly is used to perform multi-pass fourth harmonic conversion on the target continuous green laser to obtain target continuous deep ultraviolet laser. In this way, the technical implementation difficulty can be reduced, and the conversion efficiency can be improved.