124results about How to "Reduce laser energy" patented technology

A downhole filter comprises a tubular member having a wall defining a plurality of openings. The openings have an outer width less than an inner width. The parts of the opening defining the smaller width are defined by radially outer parts of the openings, such that particulates or sand prevented from passing through the openings will tend to be retained to the outside of the tubular member. A method comprises providing a tubular string having a non-porous tubular portion and a porous tubular portion, and installing the tubular string within a wellbore such that the porous tubular portion is located adjacent a fluid-producing formation within the wellbore. In another embodiment, an apparatus comprises a drill string comprising a non-porous tubular portion and a porous tubular portion, and an earth removal member operatively connected to a lower end of the drill string.

The invention discloses a three-dimensional photographing process based on a laser probe array and a device utilizing the same, and belongs to the field of three-dimensional photographing and measuring. Thousands of laser probes are projected to preset space positions according to the digital optical phase conjugation principle, reflection of the laser probes on surfaces of articles is monitored by a general two-dimensional camera, and then three-dimensional coordinate measurement is realized. Meanwhile, since the laser probe array is combined with a pair of three-dimensional cameras, more three-dimensional coordinates can be acquired by means of three-dimensional reconstruction, and accurate and compact three-dimensional coordinate measurement for large sites can be realized. Accordingly, three-dimensional matching treatment accuracy of three-dimensional images in the three-dimensional reconstruction process can be improved, matching treatment time is shortened, images picked up by the three-dimensional cameras can be compensated at the post stage, error in focal length and installation of the two cameras is eliminated, and requirements for the previous stage installation and synchronization of the focal length in the actual photographing process of the three-dimensional cameras are lowered. The three-dimensional photographing process based on the laser probe array and the device utilizing the same are applicable to fields of three-dimensional films, robots, intelligent driving, quick detection for obstacles, automatic measurement for industrial parts, and the like.

The present invention, in one aspect, relates to a method for stimulating neural tissue of a living subject. In one embodiment, the method has the steps of generating at least one beam of radiation; introducing at least one of one or more chromophores and one or more optical agents to a target neural tissue; and delivering the at least one beam of radiation to the target neural tissue, wherein the at least one beam of radiation is delivered with a radiant exposure that causes a thermal gradient in the target neural tissue, thereby stimulating the target neural tissue.

The semiconductor device comprises an inter-layer insulating film 18 formed over a substrate 10, a fuse 26 buried in the inter-layer insulating film 18, and a cover film 30 formed over the inter-layer insulating film 18 and having an opening formed therein down to the fuse 26. The inter-layer insulating film 18 is formed in contact with the side wall of the fuse 26 in the opening, whereby the fuse 26 is supported with the inter-layer insulating film 18 to thereby prevent the pattern collapse and pattern scatter. The wide scatter of the fuses can be prevented, and the fuses can be arranged in a small pitch.

The invention discloses an internal rectal optical, optoacoustic and ultrasonic multimode imaging endoscope which comprises a sleeve, an optoacoustic signal activating component, an ultrasonic signal activating and collecting component, an optical imaging component and an image reconstructing and displaying component. A device comprises a compact internal rectal optical, optoacoustic and ultrasonic multimode imaging endoscope, three kinds of imaging can be performed simultaneously, multi-parameter physical information and multi-scale structural images in recta can be acquired. The invention further provides a configuration scheme of the whole device and a method for utilizing the device for imaging. Three imaging techniques are highly integrated into one set of instrument, each imaging technique is optimized, and combination of three rectal endoscopic imaging methods of optical imaging, optoacoustic imaging and ultrasonic imaging is realized. The integrated endoscope combines specific advantages of three imaging modes, rectal physical images with multi-parameter information and multi-scale structural characteristics can be acquired, and application requirements of a rectal endoscope on medicine can be met better.

The invention discloses an acousto-optic co-rotatably scanning acousto-optic endoscope device for rectum and an imaging method using the device. The acousto-optic co-rotatably scanning acousto-optic endoscope device for rectum comprises a sleeve, a single mode fiber, a fiber collimation coupler, a hollow focused ultrasound transducer, an imaging window, a film-coating acousto-optic high reflective mirror and a micro stepping motor, wherein the diameter of the acousto-optic endoscope for rectum is just 12 mm. According to the invention, optical excitation and sound reception adopt a confocal mode, and the film-coating acousto-optic high reflective mirror is driven by the micro stepping motor preposed inside to realize co-rotation and scanning of acousto-optic focuses so as to avoid the problem of mechanical dither and eccentric probe due to scanning by the whole probe when common endoscope is externally driven to rotate. The device can quickly and stably obtain computer tomography of intracavity of the rectum with high sensitivity and high resolution.

A novel device, method and systems disclosed managing the thermal challenges of LIBS laser components and a spectrometer in a handheld structure as well the use of simplified light signal collection which includes a bare fiber optic to collect the emitted light in close proximity to (or in contact with) the test material. In one example embodiment of the handheld LIBS device, a burst pulse frequency is 4 kHz is used resulting in a time between pulses of about 250 μs which is a factor of 10 above that of other devices in the prior art. In a related embodiment, an active Q-switched laser module is used along with a compact spectrometer module using a transmission grating to improve LIBS measurement while substantially reducing the size of the handheld analyzer.

The invention provides a method used for directly drilling blind holes by using CO2 laser; two or more different diaphragms are used to carry out direct laser boring, which is also called dual-diaphragm or multi-diaphragm mode; the method comprises the steps: 1) according to the diameter of the hole to be processed, a diaphragm is selected, the dimension of laser pulse dot is controlled, a pulse is used for ablating the copper layer on the surface of the processing plate so as to lead the copper layer to form an opening; 2) another diaphragm is selected, the dimension of the laser pulse dot is changed and less than that of the laser pulse dot in the step 1); one or more pulses are used to ablate the medium layer below the opened copper layer on the surface of the processing plate, thus forming a blind hole on the processing plate. The method can generate good laser hole shape, reduces copper slag at the circumference of hole, increases the taper of the hole, avoids the defects in electroplating process, is especially applicable to electroplating hole filling process after boring, and leads the electroplating liquid medicine easy to be replaced and the fovea to be reduced; furthermore, after electroplating, no hollow defects are generated, the preparation process is simple and the cost is low.

An amorphous silicon layer and at least a heat-retaining layer are formed on a substrate in turn. Wherein, the heat-retaining layer is controlled to have an anti-reflective thickness for reducing the threshold laser energy to effect the melting of the amorphous silicon layer. Then, a laser irradiation process is performed to transform the amorphous silicon layer into a polycrystalline silicon layer. During the laser irratiation process, a portion of the laser energy transmits the heat-retaining layer to effect the melting of the amorphous silicon layer, and another portion of the laser energy is absorbed by the heat-retaining layer.

The invention relates to a laser-probe-array-based three-dimensional measurement method and a laser-probe-array-based three-dimensional measurement device and belongs to the field of three-dimensional measurement. Based on the digital optical phase conjugation principle, tens of thousands of laser probes are projected onto preset positions in space, the reflection of the laser probes on the surface of an object is monitored by a common camera and thus, the measurement of a three-dimensional coordinate is realized. The structure and parameters of the laser probe three-dimensional camera vary with application places, the precision of the measurement is improved by regional measurement, and a precision three-dimensional coordinate in a large region or 360-degree range can be obtained by combining the results of the regional measurements. The method and the device are suitable to be used in field of robot, intelligent driving, obstacle quick detection and high-precision industrial part automatic measurement and the like.

A method for producing a surface structure for a metallic press plate, endless belt or a cylindrical embossing roller through at least one laser and a device for using the method. In order to provide a cost effective production for the surface structure while using environmentally friendly techniques, it is proposed to use a laser which produces the entire surface structure through partial removal of a surface of a metallic press plate, endless belt or embossing roller to be processed. Thus, the laser is controlled by a provided 3D topography, wherein control of the laser is performed through obtained x, y and z coordinates in order to produce a depth structure, so that high portions and low portions are formed.

In one aspect, a downhole filter comprises a tubular member having a wall defining a plurality of openings. The openings have an outer width less than an inner width. The parts of the opening defining the smaller width are defined by radially outer parts of the openings, such that particulates or sand prevented from passing through the openings will tend to be retained to the outside of the tubular member. In another aspect, a method comprises providing a tubular string having a non-porous tubular portion and a porous tubular portion, and installing the tubular string within a wellbore such that the porous tubular portion is located adjacent a fluid-producing formation within the wellbore. In yet another aspect, an apparatus comprises a drill string comprising a non-porous tubular portion and a porous tubular portion, and an earth removal member operatively connected to a lower end of the drill string.

The invention provides a display panel, a preparation method and a display device thereof. Specifically, the display panel comprises a polyimide substrate, and the polyimide substrate comprises polyimide and a polymer ultraviolet light absorber, the polyimide substrate comprises a through hole, and the through hole is matched with a preset non-display area of an under-screen camera. According to the technical scheme of the specification, the polymer ultraviolet light absorber is added into the polyimide substrate; the polyimide substrate can absorb part of ultraviolet light when a coating layer is removed through laser scanning, so that the laser energy actually absorbed by the polyimide is reduced, the polyimide is prevented from being carbonized under the action of high-energy laser, andthe technical effect of improving the transmittance of the display panel is achieved.

The invention discloses a pulse laser cutting method for fragile materials, which utilizes a device comprising a pulse laser with a pulse width of millisecond level, a computer, an electric horizontal moving platform and the like to cut a fragile plate-like material. By utilizing the characteristics that linearly polarized laser can form long and narrow ablated areas on the surface of the material and that the fragile material can be easily broken, the pulse laser cutting method forms uncrossed long and narrow ablated areas distributed at intervals on the surface of the fragile plate-like material along the scanning direction, then utilizes the stress of both ends of each ablated area to break the material, and connects the neighboring ablated areas together, and thereby cutting is finished. Since the pulse laser cutting method adopts the long and narrow ablated areas formed by the linearly polarized laser, the waste of the material can be reduced, the ablated areas are cut when the material is broken, fracture surfaces are smooth, and the cutting quality is high; the ablated areas are distributed at intervals, and do not need to be crossed by one another, the needed laser energy is little, the cutting speed is high, and the pulse laser cutting method can be widely applied to the cutting of glass, ceramics, semiconductors and other fragile plate-like materials.

The invention relates to a laser sterilizing and pest control method and device. Laser beams is generated by a laser device, the laser beams in Gaussian distribution are converted into a linear light source through a light path guide system, the linear light source scans in an outer space to form a light curtain, the light curtain is allowed to pass a target area through a moving mechanism, the laser forming the light curtain irradiates the bacteria or viruses in the target area to allow the protein on the outer layer of the bacteria or viruses to cure, the bacteria or viruses cannot absorb nutrition, and die, or the insects in the target area are irradiated and killed. The laser beams are clean without chemical pollution. The laser sterilizing and pest control device is simple in structure, simple to operate and easy to store, sterilizing and pest control in a large space can be achieved as long as power and action time are controlled properly, and human body damage can be avoided.

The invention provides a laser and water jet combined machining system. According to the laser and water jet combined machining system, a jet nozzle ejects water jet out and the water jet drops on a machining route of the surface of a workpiece; a laser beam generated by a laser device is propagated in a guiding optical fiber in a protection shell body and the tail end of the guiding optical fiberis connected with a diamond guiding head; the distance between a light guiding end of the diamond guiding head and the surface of the workpiece is less than 100 micrometers; laser gathers into straight light beam output by multiple total reflection in the diamond guiding head and acts on the machining route of the surface of the workpiece in water directly. According to the system, the light pathof the laser beam is located in the protection shell body, so that it is guaranteed that the light beam is undisturbed by sputtering mist of the water jet during propagation; materials on the presetmachining route can be accurately and efficiently removed by the synergistic action of the laser beam and the high-pressure water jet, so that the light path of laser is stable, the radius of a laserspot is reduced, the cutting-up line width is reduced and the machining accuracy and quality are improved.

The invention discloses a silicon microstructure processing method based on femtosecond laser treatment and wet etching. The method comprises the steps of scanning a monocrystal silicon substrate by using a femtosecond laser at an oxygen-containing gas atmosphere; inducing silicon to generate refractive index change in a scanning region; and then, etching by using a hydrofluoric acid wet process to remove a refractive index change region to form a silicon microstructure. The method disclosed by the invention is simple in process; compared with the prior art, the method has the advantage that a distribution drawing of the microstructure does not need to be defined by using a mask plate; compared with the ordinary wet etching and dry etching, the method has the advantages that the corrosion selectivity is good, the etching region is completely determined by a femtosecond laser processing region, and no sidewise underetching exists; and a silicon slot with high depth-to-width ratio and large depth can be obtained during deep silicon slot processing. The method disclosed by the invention can be applied to a micro-electro-mechanical system.

A laser-decomposable resin composition includes (A) at least one selected from the group consisting of a carbon nanotube and a fullerene; and (B) a binder polymer.

The invention relates to a device (1) for hair-growth control of hairs (3), in particular hairs growing from human skin (5). The device (1) has a laser source (7) for generating a laser beam (9) during a pulse time, an optical system (15) for focusing the laser beam into a focal spot (25), and a laser beam manipulator (17) for positioning the focal spot in a target position. According to the invention, a dimension of the focal spot (25) and a power of the generated laser beam (9) are such that, in the focal spot (25), the laser beam has a power density which is above a characteristic threshold value for hair-growth related skin tissue above which, for the pulse time, a laser induced optical breakdown (LIOB) phenomenon occurs in the hair-growth related skin tissue. The LIOB phenomenon results in a number of mechanical effects, such as cavitation and the generation of shock waves, which damage the hair-growth related skin tissue in positions surrounding the LIOB phenomenon. An advantage of the device (1) according to the invention is that the amount of total energy which is necessary to cause trauma and induce (semi-)permanent cessation of hair-growth is at such a level that irritation and damage of the surrounding skin tissue is very limited or even completely prevented.

The invention discloses a rear wall protection method for taking an ice-carbon powder mixer as a turbine blade for laser processing. The rear wall protection method comprises the following steps: carbon powder and water are mixed and stirred to prepare carbon water suspension; a hole in the bottom end of the turbine blade is plugged, and the carbon water suspension is poured into a blade runner through a hole in the top end of the turbine blade; the turbine blade filled with the carbon water suspension is arranged into a freezing chamber for freezing; after the water in the carbon water suspension of the turbine blade is condensed into ice, filling of a protection material is completed; the turbine blade is put into an environment with the temperature below 0 DEG C and is perforated by pulse type laser radiation; after perforation, a plug body is taken out, and the turbine blade is immersed into boiled water; after the ice is melted, residual carbon powder in the blade runner is flushed out by running water through the hole in the top end of the turbine blade; after the carbon powder is completely flushed away, the turbine blade is dried by hot air. The technology is simple, and the cost is low.

Provided herein is a particle analyzer that is operably connected to a probe unit that is capable of both dislodging particles from a surface and sampling the particles after they have been dislodged. The devices and methods described herein may be lightweight and / or handheld, for example, so that they may be used within a cleanroom environment to clean and sample permanent surfaces and tools. The devices may include optical particle counters that use scattered, obscured or emitted light to detect particles, including condensation particle counting systems or split detection optical particle counters to increase the sensitivity of the device and thereby facilitate detection of smaller particles, while avoiding the increased complexity typically required for the detection of nanoscale particles, such as particles less than 100 nm in effective diameter.

The invention relates to a device and method utilizing laser light to induce compound stamping formation. The device comprises a flume; the flume is internally provided with a cushion block, a micro molding die and a blank holder; by utilizing laser-induced plasmas and a cavitation collapse-induced shock wave as a workpiece formation force source, a laser beam performs focusing in a through hole of the blank holder through a lens group, a laser focus point and the defocusing amount of the surface of a workpiece are regulated to enable the workpiece formation effect to reach the best effect, and the laser-induced plasmas and cavitation bubbles are sequentially produced on the surface of the workpiece; and the workpiece generates plastic deformation under the effects of a plasma shock wave and the cavitation collapse-induced shock wave, and finally, workpiece stamping formation is realized through the micro molding die. The method provided by the invention is a brand new compound formation method and greatly increases the stamping depth of the workpiece compared with a cavitation formation method; and meanwhile, due to underwater formation, compared with laser impact formation, the method can reduce the influence of the laser thermal effect to the maximum and ensures the surface formation quality of the workpiece.

An absorption film for laser welding to greatly reduce the laser reflection and lower the power of laser is composed of the first and the second metal layers and a medium layer between said two metallayers.

A laser, aimed at a flyer plate tab, causes optical energy to be directed at the tab, specifically, at a top surface thereof. Energy impacting the tab accelerates the tab out of an initial bent position, straightening it into an impact with a target sheet. The impact occurs in excess of 100 m / s, resulting in a metallurgical bond between the tab and the target sheet. The laser preferably strikes the top surface in a normal direction, based upon an initial angularity of the tab relative to the target. The laser emission, preferably in the range of 1 to 100 Joules delivered in a microsecond, may be augmented by an ablative layer on the top surface or a transparent covering on the top surface that reacts against the expanding gas from ablative activity on the top surface. The weld is formed without physical contact between the welding device and the tab.

The present invention relates to the field of LED chip technology, and particularly relates to an LED chiplet and an LED chip invisible cutting method. The LED chiplet is disclosed, wherein the side surface of a substrate of the LED chiplet is provided with a plurality (three or more) of spaced laser scratches along the thickness direction of the substrate, and the side surface of the substrate is arranged in an up-and-down manner along the thickness direction of the substrate. The method is also provided, including a step S1) of forming a plurality of (three or more) laser scratches spaced along the thickness direction of the substrate inside the substrate in a cutting passage by adopting invisible cutting. According to the LED chiplet and the method, the yield of chiplet cutting is increased, substrate inclination is reduced, and the width of cutting passage lines can be reduced, thus increasing the yield from one chip. Side light extraction is increased, the light emitting angle is increased and forward-direction light is increased, thus increasing the brightness of the chiplet.

A decomposable resin composition containing a metathesis catalyst and a polymer compound.

The invention discloses a extender lens for expanding high power laser beams, which has the main technical characteristics that a plurality of optical fiber rods with equal lengths are all tightly arranged in the cavity body of a housing and the end surfaces of the optical fiber rods respectively form input faces and output faces; the optical fiber rods are bare optical fibers and can adopt optical fibers the core diameter of which is smaller than that of single mode fiber. The invention can expand the laser beans as well as shape and stabilize the direction of the laser beans, and has the advantages of high laser induced damage threshold, simple structure and great reduction of the volume and the weight of a laser shot system.

Provided herein is a particle analyzer that is operably connected to a probe unit that is capable of both dislodging particles from a surface and sampling the particles after they have been dislodged. The devices and methods described herein may be lightweight and / or handheld, for example, so that they may be used within a cleanroom environment to clean and sample permanent surfaces and tools. The devices may include optical particle counters that use scattered, obscured or emitted light to detect particles, including condensation particle counting systems or split detection optical particle counters to increase the sensitivity of the device and thereby facilitate detection of smaller particles, while avoiding the increased complexity typically required for the detection of nanoscale particles, such as particles less than 100 nm in effective diameter.

The invention discloses a laser beam homogenization device which comprises a laser, a microlens array and an emitting lens, wherein the microlens array comprises a plurality of microlenses, and is positioned on a light emitting path of the laser; and the emitting lens is arranged behind the microlens array and positioned on light emitting paths of the laser and the microlens array. According to the invention, laser beams can be uniformly emitted; and compared with the prior art, the laser beam homogenization device has the advantages that the spot uniformity is remarkably improved, laser energy attenuation is reduced, and the realizing difficulty is little.