17 results about "Beam dump" patented technology

The utility model discloses a femtosecond pulse laser filament control system, which comprises a laser transmitter, a power meter, a target chamber, a beam collector, a vacuum pump, an optical fiber probe and an optical fiber spectrometer, a reflecting mirror I and a diaphragm are arranged between the laser transmitter and the power meter; a convex lens I is arranged between the reflecting mirror II and the target chamber; one side of the target chamber is provided with a light hole, the light hole is opposite to the optical fiber probe, a convex lens II is arranged between the light hole and the optical fiber probe, the optical fiber probe is connected with an optical fiber spectrometer through an optical fiber, and the optical fiber spectrometer is used for being connected with an upper computer; wherein the vacuum pump is communicated with the interior of the target chamber. According to the utility model, the size of the laser beam can be adjusted, the length of the laser filament can be controllably adjusted, and the influence of different environments on the spectral signal-to-noise ratio can be obtained, so that a stable and reliable basis is provided for a subsequent controllable LIBS (Laser-induced Breakdown Spectroscopy) experiment.

This relates to laser processing equipment and its components. [Solution] The laser processing apparatus includes a positioner positioned within a beam path through which a laser energy beam can propagate. A controller may be used to control the operation of the positioner to deflect the beam path within a first primary angular range and a second primary angular range, and to deflect the beam path to multiple angles within each of the first and second primary angular ranges. In other embodiments, the integrated beam dump system includes a frame and a pick-off mirror and beam dump connected to the frame. In yet another embodiment, the wavefront correction optical component includes a mirror having a reflective surface having a shape characterized by specific ratios of Fringe-Zernike terms Z4 and Z9. Many more embodiments are disclosed.

Embodiments of a laser beam dump assembly are disclosed. In one embodiment, the laser beam dump assembly includes a beam dump housing having a housing body and a channel formed therein, wherein the channel is sized to allow an incident laser beam to propagate therethrough to an interior space formed in the housing body. The laser beam dump assembly further includes a beam scattering member having a curved scattering surface configured to scatter or reflect a first portion of the incident laser beam and allow a second portion of the incident laser beam to be absorbed by the scattering member as thermal energy. A heat sink is coupled to the beam dump housing and in thermal communication with the beam scattering member, wherein the heat sink is configured to absorb and dissipate the thermal energy from the beam scattering member.

A laser-processing apparatus is disclosed. In one embodiment, the laser-processing apparatus includes a debris removal system with an integrated beam dump system, the beam dump system operative to selectively position an absorber within the beam path of a beam of laser energy. The beam dump system may allow the beam of laser energy to propagate through the scan lens of the laser-processing apparatus, but prevent the beam of laser energy from processing a workpiece. The beam dump system may include an actuator assembly operative to retract the absorber from the beam path, thereby allowing the beam to propagate to the workpiece and for debris from laser processing to be drawn into a vacuum nozzle, thereby preventing damage to the scan lens. The beam dump system may further include a heat transfer system operative to control the rate of heat transferred away from the absorber.

The present invention relates to an apparatus and a method for an electron beam system for manufacturing a three-dimensional object by fusing successive layers of powder, said system having at least one lens for reshaping of said electron beam, an electron source and a powder bed, said method comprising the step: blocking a selected cross section of said electron beam for controlling the electron beam power. By interference between the electron beam and a beam blocking part a portion of the electron beam is prevented from reaching the powder bed.

Method and apparatus 10a for the harmonic generation of laser frequencies in which an input fundamental laser beam 20 is split into two orthogonal polarisations, each polarisation being directed around an independent optical path by at least one steering element 26b, 30b, 32b, 36b, prior to a series of harmonic crystals 40, 42, to optimise conversion efficiency. Independently controlling both polarisations of the fundamental laser beam provides independent alignment optimisation of phase-matching parameters without major cross- talk / coupling with other parameters. The invention allows for a compact arrangement, spatial and temporal walk-off compensation, separate temporal adjustment between the two fundamental polarised beams for temporal compensation in the third harmonic or fifth harmonic processes, adjustment of the photon ratio, single-pulse generation, reduction of fundamental depletion for generation of the third harmonic or fifth harmonic and use of a common beam dump 16 for unconverted light 54. [Fig. 5]

1. The name of the design product: medical imaging equipment beam light device (DR). 2. The use of the design product: for positioning and controlling the X-ray irradiation range. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

Numerous embodiments are disclosed. In one, a laser-processing apparatus includes a positioner arranged within a beam path along which a beam of laser energy is propagatable. A controller may be used to control an operation of the positioner to deflect the beam path within first and second primary angular ranges, and to deflect the beam path to a plurality of angles within each of the first and second primary angular ranges. In another, an integrated beam dump system includes a frame; and a pickoff mirror and beam dump coupled to the frame. In still another, a wavefront correction optic includes a mirror having a reflective surface having a shape characterized by a particular ratio of fringe Zernike terms Z4 and Z9. Many more embodiments are disclosed.

The invention belongs to the technical field of quantum optics, and particularly relates to a system and method for generating a space compression light array by using Laguerre Gaussian beams, and the system comprises a laser, a first half-wave plate, a first polarization splitting prism, a first beam collector, a second half-wave plate, a second polarization splitting prism, a small reflector, and a spatial light modulator. The system comprises two large reflectors, a third half-wave plate, two third polarization splitting prisms, a second beam collector, a rubidium atom chamber, two quarter-wave plates, two fourth polarization splitting prisms and two balance zero-beat detectors. The first light beam collector and the second light beam collector are arranged on one side of the first polarization beam splitting prism and one side of the third polarization beam splitting prism respectively, the small reflector is arranged on one side of the second polarization beam splitting prism, and the spatial light modulator is in wired connection with the display controller. And the crosstalk problem of the traditional scheme is avoided.

The invention provides a polarization-tunable extreme ultraviolet pulse laser generating device, and the device comprises a fiber laser which is used for generating fundamental frequency laser; the light beam direction stabilizing system is used for stabilizing the output direction of the fundamental frequency laser; the frequency conversion module is used for performing frequency tripling operation on the fundamental frequency laser to obtain frequency tripled linear polarization laser and first residual laser; the dichroic mirror is used for separating the triple-frequency linear polarization laser and the residual laser; the first light beam collector is used for collecting first residual laser; the frequency tripling reflector is used for reflecting the frequency tripling linear polarization laser to the polarization tuning module; the polarization tuning module is used for performing polarization tuning on the triple-frequency linear polarization laser; the inert gas frequency conversion module is used for performing frequency tripling operation on the tuned frequency tripling linear polarization laser to obtain extreme ultraviolet laser and second residual laser; and the focusing-monochromatic-detection module is used for separating the extreme ultraviolet laser and the second residual laser.

The present application discloses an apparatus configured to measure characteristics of high power beams of laser energy used in material processing. In one embodiment, the apparatus includes a housing having a first compartment and a second compartment separated from each other to reduce the transfer of thermal energy between them. Optical modules having optical sensors configured to measure characteristics of the high power beam are mounted in the first compartment. An optical window operative to allow a significant portion of the beam to propagate therethrough is mounted in an intermediate housing member separating the first and second compartments. A removable and replaceable beam dump configured to absorb most of the high power beam is positioned in the second compartment. The removability / replaceability of the beam dump enables operation of the apparatus without active cooling of the beam dump assembly, simplifying the apparatus and protecting the optical sensors in the first compartment.

The present invention relates to improved Raman spectroscopy flow cells and integrated systems for in situ analysis of fluid samples under enclosed conditions. Two novel flow cell designs are disclosed: a Z-design, featuring an angled optical path with a beam dump cavity lined with non-reflective, non-fluorescent material to reduce optical noise, and a T-design, featuring a horizontal flow channel with vertical optical access through a window, sealed using standard O-rings. Both designs isolate the Raman probe from direct fluid contact, minimize dead volume, and facilitate efficient beam management for enhanced signal-to-noise ratio. The invention also covers integrated systems comprising a Raman spectrometer, probe, and the improved flow cells, enabling real-time, high-accuracy fluid analysis in industrial and laboratory environments. These designs improve optical performance, manufacturability, and adaptability across a range of Raman spectroscopy applications.

A neutron shielding apparatus has a shield member made of a neutron attenuation material. The shield member has a cavity defining an entrance with an entrance width for accepting an ion beam along a beam path. A target structure intercepts the ion beam within the cavity at a predetermined distance from the entrance, where the predetermined distance is greater than approximately one-half the entrance width, and where the ion beam emits neutron radiation in all directions. The neutron attenuation material attenuates the neutron radiation to a predetermined radiation exposure limit at one or more regions beyond a predetermined periphery of the target structure. The cavity can be a blind hole extending a predetermined depth from the entrance, or a passageway extending through the shield member defining the entrance and an exit. A positioning apparatus can selectively position the target structure at a target position within the cavity.

The utility model relates to a compact optical pickup device, include: light receiving part, between optical equipment fixed as optical pickup quick detachable interface, light beam collector is used for collecting light beam, light beam adapter is connected with light beam collector at one end, adjusting frame is equipped with mirror in it, and mirror is obliquely arranged, connecting piece is for light inlet end, and the light to be collected passes through mirror reflection and is collected to light beam collector in connecting piece place. The compact optical pickup device, the light to be collected enters from the light inlet end of connecting piece, and the angle of mirror is adjusted through the threaded pair on adjusting frame to realize that the light beam comes in is reflected to the center of light beam collector, can reduce the space of optical pickup since the change of the direction of light path propagation, in addition, the mode that top screw and swallow-tailed groove are used between light beam collector, light beam adapter, adjusting frame, mirror and connecting piece, and the dismounting is convenient and fast, can greatly save time.

This invention provides a high-order harmonic generation device based on four-aperture mirrors, comprising: a driving laser module, a first aperture mirror, a second aperture mirror, a first beam collector, a focusing mirror, a gas target, a third aperture mirror, a second beam collector, a fourth aperture mirror, a third beam collector, a metal film, a vacuum cavity, and a vacuum module. The first aperture mirror, the second aperture mirror, the focusing mirror, the gas target, the third aperture mirror, the fourth aperture mirror, and the metal film are disposed within the vacuum cavity. Through the synergistic effect of the four aperture mirrors, ring shaping, two-stage spatial filtering and efficient separation of the driving laser, as well as lossless transmission of high-order harmonics are achieved. This not only successfully attenuates the hundred-watt-level driving laser by more than a thousand times, solving the problem of optical component damage under high power; but also ensures high-throughput output of high-order harmonics while achieving efficient separation. The generated harmonic spectrum has a wide range and a small divergence angle, making it ideal as a light source for time-resolved pump-probe experiments.

According to an aspect, there is provided a treatment device (2; 30; 60; 130) for performing light-based treatment operations on or to a subject. The treatment device (2; 30; 60; 130) comprises a light source (12) for generating light for performing the treatment operation; a dichroic filter (34; 64; 104; 134) arranged at a first angle with respect to the incident light such that the incident light is separated into a transmitted light component and a reflected light component according to a cut-off wavelength of the dichroic filter (34; 64; 104; 134), wherein the transmitted light component is transmitted through the dichroic filter (34; 64; 104; 134) and the reflected light component is reflected by the dichroic filter (34; 64; 104; 134); a light exit window (10) through which a light component is emitted from the treatment device (2; 30; 60; 130); a beam dump (44; 74; 140) configured to absorb a light component; and a heat sink (46; 76; 142) coupled to the beam dump (44; 74; 140) to dissipate heat from the beam dump (44; 74; 140). The light exit window (10) and beam dump (44; 74; 140) are arranged with respect to the dichroic filter (34; 64; 104; 134) such that one of the transmitted light component and the reflected light component is emitted from the treatment device (2; 30; 60; 130) via the light exit window (10) and the other one of the transmitted light component and reflected light component is incident on the beam dump (44; 74; 140). The dichroic filter (34; 64; 104; 134) is provided on a first surface of a solid dichroic prism (38; 68) or an internal surface in a solid dichroic cuboid.

A lighting module (100) configured to provide, in operation, module light (M1), the lighting module comprising: a first laser light source (102) configured to provide a first laser light (L1); a first wavelength converting element (104) configured to at least partly convert the first laser light into a first converted light (C1) having a first spectral distribution (S 1); a light exit window (112) configured to couple out the module light; a beam dump (108); and a wavelength beam splitter (106) configured to: split the first converted light at a cut-off wavelength (1c) into a first portion (C1,1) and a second portion (C1,2), convey the first portion toward the beam dump, and convey the second portion toward the light exit window; wherein the module light comprises the second portion of the first converted light; and wherein the beam dump comprises a photovoltaic cell (110) configured to convert the first portion of the first converted light received at the photovoltaic cell into electricity (E).