122results about How to "Reduce laser energy" patented technology

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.

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.

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 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.

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.

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.