39 results about "Laser light" patented technology

An optical fiber 13, of which one end 13a is optically coupled to a laser light source 12, for propagating, from the one end 13a to other end 13c, a laser light emitted from the laser light source 12, and a light-guiding plate 11 including a light-guiding section 11b in which a plurality of right prisms of the same shape for extracting the laser light by contacting the optical fiber 13 are arranged parallel to each other in the same direction at equal intervals, and also including a planar section 11c for diffusing the laser light extracted from the light-guiding section 11b and emitting the diffused laser light from one main surface, are provided. The optical fiber 13 is bent more than twice to form a plurality of straight line portions arranged parallel to each other at unequal intervals, and the optical fiber 13 and the light-guiding plate 11 are positioned such that the laser light is extracted at equal intervals from each of the plurality of straight line portions.

The invention discloses a method for preparing a self-supporting mono-crystal gallium nitride substrate, comprising the following steps: a layer of masking film is grown on a GaN heteroepitaxal substrate, and a series of growth windows are opened on the masking film, and then a GaN nucleating layer, a GaN template layer and a GaN thick film are sequentially grown, and then the heteroepitaxal substrate is peeled by laser light. The method is a two-step stress relief method: the first step adopts side extension technology, one part of area of a sample is connected with the heteroepitaxal substrate, so as to release partial stress naturally; the second step adopts laser peeling technology to peel the sample from the heteroepitaxal substrate, and then partial stress is released again. The self-supporting mono-crystal gallium nitride substrate prepared by the invention has uniform stress relief and high finished product ratio and is suitable for large-scale industrial production.

The invention discloses a laser precision de-weight system. The system comprises a laser light path transmission unit, a work field, a laser circuit control unit, a focusing adjustment device and a photographic device, and the laser light path transmission unit transmits high-energy density laser to the work field; the laser circuit control unit comprises an upper computer, a master control circuit, a laser control circuit, an image acquisition card and a motor driver; the master control circuit sends direction and pulse instructions received from the upper computer into the motor driver, the motor driver sends direction and pulse signals to the focusing adjustment device, the position movement of the laser light path transmission unit is controlled, and the laser focal position is further controlled accurately. According to the laser precision de-weight system and method, the traditional electric drill de-weight balancing mode is replaced with the laser de-weight mode, defects that the traditional balancing mode is poor in location precision and low in de-weight precision are made up, the traditional complex de-weight process is simplified, a rotor does not need to be mounted and clamped multiple times, and the balancing efficiency of the rotor is improved.

A laser light source comprises a semiconductor laser adapted for pulsed operation, a partially transmitting wavelength selective light reflector. The semiconductor laser comprises a front facet and a back facet. The front facet and the back facet define an internal laser cavity. The internal laser cavity comprises a laser active medium. The partially transmitting wavelength selective light reflector has a peak reflectivity within a gain bandwidth of said laser active medium. The wavelength selective light reflector and the back facet define an external laser cavity. A roundtrip time of light in the external laser cavity is about 20 nanoseconds or less. A full width half maximum bandwidth of the wavelength selective light reflector is adapted to accommodate at least 12 longitudinal modes of the internal laser cavity and at least 250 longitudinal modes of the external laser cavity.

A method for measuring the mean velocity (V_H) of an extracorporeal blood fluid or infusion fluid, by means of retroinjection interferometry, comprises the step of emitting a first laser light beam (41), from the laser cavity (40) of a semiconductor laser source (60), reflection of a second laser beam (45) by the fluid (50) and consequent generation of interference with the first laser beam (41) inside the laser cavity (40), detection of the interference signal by a monitoring photodiode (46), and processing, by means of an electronic processing and control circuit (100), of the interference signal detected. The invention also comprises an apparatus (62) for implementing the method described and an extracorporeal circuit (58) comprising said apparatus. The invention also comprises a method for replacing a laser source in said apparatus.

The invention discloses a novel microchip laser supporting optical fiber output, which belongs to the fields of laser technology and non-linear optics. The novel microchip laser mainly comprises a laser diode pumping source, an optical fiber output system, an optical collimation system, a laser light gain medium and optical elements, wherein pump light enters the optical collimation system for collimating after passing through the optical fiber output system, and is focused onto the gain medium; the film-plated optical elements are arranged in front of and behind the gain medium; the gain medium and the film-plated optical elements in front of and behind the gain medium construct a laser resonant cavity with a sandwich structure; laser light generated by the laser resonant cavity returns along the incident direction of the pump light, passes through the optical collimation system once again, and is output through the optical fiber output system. The novel microchip laser has the characteristics that optical fiber output is performed during the use of an optical fiber pump without any additional output device in a sandwich microchip structure, and a fiber-core pump or a cladding pump can be adopted, so that the flexibility of a system is improved greatly; and meanwhile, the structure can also be applied to pulse modulation of materials such as semiconductor saturable absorbing mirrors, single-wall carbon nanotubes or graphene and the like, and stable pulse output is realized.

A hand-held laser-welding wand includes a gas lens assembly that develops an inert gas atmosphere around a weld pool. The lens assembly additionally reflects laser light and thermal radiation that is reflected off a work piece surface away from the hand of a user of the hand-held laser welding wand.

Provided is an input unit and input method for an information terminal for easy input work and avoiding an operating error. Included are a support, an input unit including a laser device on the support, an information terminal including a sensor in a display portion, and a switch connected with or without a wire to at least one of the laser device and the information terminal. A desired region of the display portion is irradiated with laser light output from the input unit. Information is input to the region by operation of the switch in the state where the region is irradiated with laser light.

The invention relates to an off-axis optical path three-dimensional microscopic topography measurement system. The system comprises an imaging object lens, an interference device and an image acquisition device. The interference device comprises a laser light source, a beam splitter prism, a first reflector, a second reflector, a fine adjustment reflector and a reference object lens. A laser lightbeam irradiates on the beam splitter prism via the first reflector and then outputs two light beams, the first light beam irradiates on a sample through an imaging object lens, and a reflected lightarrives at the image acquisition device via the imaging object lens and the beam splitter prism; the second light beam irradiates on the fine adjustment reflector via the second reflector and the reference object lens, the reflected light irradiates on the image acquisition device via the reference object lens, the second reflector and the beam splitter prism and forms a reference light, an off-axis angle of 1.52-7.57 degrees is formed between an object light and the reference light, thus, off-axis interference is formed, and an interference hologram is obtained through recording of the imageacquisition device. By optical path design, the system provided by the invention overcomes the difficulty that the conventional pre-magnified microscopic optical path optical wave curvature is difficult to adjust. The whole system is compact in structure and has high anti-noise ability.

The invention provides a laser radar transmitting system, and belongs to the technical field of laser radar systems. The laser radar transmitting system comprises a laser light source, a collimating optical device arranged on an emergent light path of the laser light source and used for forming a collimating light beam, an adjustable support used for fixedly installing the laser light source and the collimating optical device, a fixed support fixed on a laser radar shell and used for installing the adjustable support, and adjusting components used for adjusting a swing position of the adjustable support relative to the fixed support, wherein the adjustable support can swing in a direction perpendicular to the light path of the collimating light beam relative to the fixed support. Accordingto the laser radar transmitting system provided by the invention, the structural deviation caused by processing, assembly and device errors can be counteracted by adjusting an emission angle of the laser radar, the requirements of the system for the processing and assembly errors are met, and the measurement precision of the laser radar is effectively improved.

The invention discloses a laser marking device and method and relates to the field of laser machining. The laser marking device comprises a laser, a control module, an optical module and an electric control part, wherein the laser is used for providing a laser light source and emitting laser light to the surface of anodized aluminum; the control module is used for setting laser light parameters ofrunning of the laser; the optical module is used for controlling the output light spot diameters and the running track of the laser light according to the laser light parameters; and the electric control part is used for providing an energy power source for the laser and the optical module and controlling the output manner of the laser light. According to the laser marking device and method, thelaser light output by the laser can be controlled to remove dye of the anodized aluminum without damaging the anodized aluminum by setting the corresponding laser parameters, a better marking effect and high marking efficiency are achieved, and the marked anodized aluminum has a stable structure and more attractive appearance.

The embodiment of the invention discloses a laser light path system and a double-head laser marking machine, and relates to the technical field of laser processing equipment. The light path system comprises a laser generator, a light path input module, a light splitting module, a light path output module and a light emitting control module, the laser emitted by the laser generator is guided into the light splitting module through the light path input module, the light splitting module is used for dividing the laser into two beams, the light path output module is used for outputting the laser,the light emitting control module is used for controlling the laser in the light splitting module to pass through the light path output module. According to the provided laser light path system, a vertical light path structure is adopted, the light path input module, the light splitting module and the light path output module each are independently provided with light path structures, moreover, the light path structures communicate with one another, and the laser light path system is simple and compact in structure, high in light path stability and high in light beam quality.

A device for the laser transmission welding of two plastic assembly parts is provided, wherein at least one of the plastic assembly parts contains an absorber for laser light, comprising a processing head with a processing side, with a processing-side discharge shaft for at least one laser beam and with a laser-transparent pressing means for pressing together the plastic assembly parts, wherein the laser-transparent pressing means is guided decoupled from the processing head in the discharge shaft. Furthermore, a method for producing a welded joint between two plastic assembly parts by laser transmission welding is specified.

The invention discloses a laser light performance system and an operating method thereof. The laser light performance system comprises a base, a horizontal rotating wheel, a conductive slip ring, an L-shaped aluminum alloy support, a vertical stepping motor and a laser hollow cylinder light outlet. The horizontal rotating wheel drives the L-shaped aluminum alloy support and can horizontally rotate by adopting the conductive slip ring to achieve 360 continuous and cyclic rotation without winding, the vertical stepping motor drives the laser hollow cylinder light outlet to achieve vertical 360-degree rotation based on horizontal rotation, horizontal rotation and vertical rotation are integrated through the L-shaped aluminum alloy support, and laser can be driven to form beams so as to achieve full-angle scanning.

An interferometric device for position measurement of an element moveable in a plane is disclosed. A laser light source measures the position of the moveable element and emits the required measuring light. A beam splitter splits the measuring light into a first partial beam path and a second partial beam path, which each impinge on a reflecting surface of the moveable element via an interferometer. Herein, at least the beam splitter, which splits the measuring light into a first partial beam path and a second partial beam path, and the beam splitter, which directs the third partial beam path onto an etalon via an interferometer, have a respective beam trap associated with them, which traps the light returning from the respective interferometers.

The invention discloses a cylinder internal flow field visualization cylinder cover and method of a large diesel engine. The cylinder cover is provided with an annular inner edge. A plurality of pairs of through holes are symmetrically formed in the peripheral wall of the annular inner edge in the radial direction, and a laser light source is installed in one through hole. The laser light source is used for collecting the information of a cylinder internal flow field in the fuel injection process. CCD image sensors are installed in the through holes in the opposite side of the laser light source and used for receiving the information, sent by the laser light source, of the cylinder internal flow field and transmitting the information to an external CCD image processing device to be processed. One or two or more through holes of different angles can be selected at will in the opposite face of the placement of the laser light source for containing the CCD image sensors, and therefore the situation of the cylinder internal flow field can be observed from a plurality of angles, and the analysis accuracy is improved. Other through holes not used temporally are sealed and filled with metal sealing components, and therefore the influence on fuel combustion is prevented.

The invention relates to an all-solid-state laser device operating in a wide temperature range. The all-solid-state laser device comprises a high-power LED light source, two orthogonally-placed Porro prisms, a laser gain medium, a polarizing film and a quarter wave plate, wherein the high-power LED light source is used for generating pump light; the orthogonal Porro prisms, the laser gain medium, the polarizing film and the quarter wave plate are positioned on the same optical axis to form a resonant cavity for generating laser light; the laser gain medium is selected from the group consisting of Nd:Cr:YAG, Nd:Ce:YAG and Nd:Cr:Ce:YAG; an included angle between the polarizing film and the optical axis is a brewster angle; and the quarter wave plate is a zero-order wave plate corresponding to wavelength of the output laser light. The all-solid-state laser device is compact in structure and stable in performance, and can operate stably in a 100 DEG C temperature range from minus 40 DEG C to 60 DEG C.

A laser processing apparatus and a laser processing method for improving the processing speed and forming uniform and highly accurate through holes when processing for forming fine through holes in a matrix in a long thin plate, and a thin plate having through holes in a matrix formed by such laser processing. A laser processing apparatus includes a cylindrical body having an opening on a circumferential surface around which a thin plate to be processed is wound obliquely, a thin plate transfer for transferring a thin plate wound around the cylindrical body in the longitudinal direction of the thin plate, a motor having a rotation axis arranged coaxially with a central axis of the cylindrical body, a reflecting member fixed to a rotating shaft of the motor, a laser light emitting means for emitting pulsed light. The apparatus continuously opens through holes in the thin plate.

The invention relates to the technical field of light guide plate machining, in particular to laser machining equipment for a light guide plate. The laser machining equipment for the light guide platecomprises a rack, a dust suction mechanism, a blowing mechanism and a laser generating mechanism; the dust suction mechanism comprises an air outlet, a filtering box and a dust suction part; the blowing mechanism comprises an air inlet, a drying box and a blowing part; and the laser generating mechanism is used for generating laser light to cut the light guide plate. According to the laser machining equipment for the light guide plate, the blowing mechanism and the dust removing mechanism are arranged, blowing can be achieved while dust suction is conducted, generation of negative pressure isprevented, and the laser machining precision is guaranteed.

An instantaneous frequency measurement system based on a differential optical time stretching principle relates to the field of microwave photonics, ultrafast measurement and real-time measurement, and is characterized in that a light output end of a pulse laser light source is connected with one end of a dispersion module I, the other end of the dispersion module I is connected with an input end of a polarization controller, and an output end of the polarization controller is connected with a light input end of a modulator; one output port of the modulator is connected with the input end of the optical circulator I; the other output port of the modulator is connected with the input end of the optical circulator I, the other output port of the modulator is connected with the input end of the optical circulator II, the port of the optical circulator I and the port of the optical circulator II are respectively connected with one end of the dispersion module II, and the port of the optical circulator I and the port of the optical circulator II are respectively connected with the first optical input port and the second optical input port of the balance detector. The system can relieve the pressure of rear-end electronic equipment, eliminates the distortion influence of uneven laser pulse envelope on measurement through differential detection, and can perform real-time and accurate ultrafast measurement on multi-frequency signals.

In order to overcome the problem of incapability of timely dissipating accumulated heat efficiently due to continuous work of a fluorescent material in a traditional fluorescent illumination light source, the invention discloses a laser fluorescence excitation illumination device. The device consists of a laser light source, a reflecting bowl, a support mechanism and a fluorescence excitation device, wherein the fluorescence excitation device consists of a fluorescent turntable, a heat sink and a heat dissipating fin. The laser fluorescence excitation illumination device adopts an interval excitation mode, so that the fluorescent material is located in an intermittent working state to prevent centralized heat caused by continuous work and to improve the heat exchange efficiency. The fluorescent turntable and the heat sink are made of red copper materials with excellent heat conductivity; and heat generated by an excitation end can be quickly transferred to a back end heat dissipating structure. The back end heat dissipating structure is a of a fine structure for increasing the heat dissipating area. Heat conducting silicone grease is coated in each connected place in the device toprevent bad heat conduction caused by assembly gaps. The laser fluorescence excitation illumination device can effectively improve the heat dissipation efficiency of the fluorescent illumination device and prolong the service life of the fluorescent material.

The invention relates to an LED distress call screen, in particular to a hidden photovoltaic power storage LED distress call screen. The invention aims to provide the hidden photovoltaic power storage LED distress call screen which is time-saving and labor-saving. The hidden photovoltaic power storage LED distress call screen comprises a shell and a fixing ring, the fixing ring is arranged on the upper portion of the inner side of the shell, and the shell is made of stainless steel; the mounting pipe is arranged in the middle of the fixing ring; the lower part of the inner side of the mounting pipe is provided with the storage battery for storing electric energy; and the waterproof key is arranged at the lower part of the front side of the shell. Solar energy can be absorbed through the solar cell panel, the solar energy is converted into electric energy to be stored in the storage battery, so that hand power generation is not needed, time and labor are saved, and a rescue team can find a distress call place more easily through the effects of the illuminating lamp, the laser lamp and the LED lamp strip.

The invention discloses a laser light path system and a method for processing a flexible circuit board by using the laser light path system. According to the key points of the technical scheme, the laser light path system comprises a laser, and the output end of the laser is provided with an acousto-optic deflector for splitting light; and laser divided into two beams by the acousto-optic deflector passes through a zoom beam expander and a half-wave plate respectively and then is combined into one beam through a polarization beam combiner, and a galvanometer scanning system and a focusing lensare sequentially arranged at the output end of the polarization beam combiner. The processing method comprises the following steps: continuously processing one hole site by using the focusing laser and the out-of-focus laser, moving the flexible circuit board, and continuously processing the other hole site. Compared with the prior art that all holes are punched through focusing laser and then punched through out-of-focus laser again, the continuous punching mode can greatly shorten the machining path, and therefore the machining efficiency is greatly improved.