52results about How to "Improve spot quality" patented technology

The invention discloses a 780 nm high-power optical-fiber femtosecond laser device. The laser device comprises a laser device seed source, a laser spreading and amplifying module, a laser compression module and a laser frequency doubling module, the laser device seed source and the preceding modules are sequentially connected, the laser spreading and amplifying module is composed of a chirped pulse spreading sub module, a pulse separation sub module and an optical fiber amplifying sub module, and the laser device seed source and the modules all work at the waveband of 1560 nm. A mixed pulse spreading mode is adopted, pulses are spread from 100 fs to 1ns in a small work space, the amplified pulses are compressed to below 100 fs through non-linear compression of a single-mode fiber, and ultimately the pulses reach 780 nm after frequency doubling of non-linear crystals. The laser device has the advantages of being high in stability, simple in structure, small and ingenious in size, low in cost and the like.

The invention relates to a novel movie and stage lighting lamp, belonging to the technical field of movie and stage lighting devices. The light path of the lighting lamp is composed of a light source, a reflective bowl, an intermediate convergence lens, a folding line-shaped light-collecting device and a light emergent lens; a high lighting effect and high-quality light spots are obtained by adopting the parabolic reflective bowl with a light receiving margin, an aspherical surface intermittent converging lens with a vacuum heat isolating layer, the folding line-shaped light-collecting device and the light emergent lens to control pitching angles by virtue of a focus control device and a light emergent lens tilting adjusting device; and in a lamp body, through the air natural convection from a ventilation air inlet at the front end of the lamp to a light source base heat dissipation channel and the heat insulation and heat dissipation design of optical components and by adopting a light source base with heat dissipation seams and a tilting low-wind resistance heat dissipation structure of ring type heat dissipation wing, the low noise requirement of the lamp is realized by virtue of the natural ventilation and heat dissipation. The novel movie and stage lighting lamp provided by the invention has the characteristics of high light efficacy, low energy consumption, low noise, high-quality light spots and suitability for movie shooting and theater stage lighting.

The invention discloses a multi-focus light spot energy homogenizing Fresnel lens. As the multi-focus light spot energy homogenizing Fresnel lens is obtained through decomposing and recompounding the traditional Fresnel lenses, the unevenness of the light spot energy of the Fresnel lens is reduced greatly, the quality of the light spot can be improved greatly, the uniform irradiation can be received by a solar battery, the generated transverse current is less, the internal consumption of the solar battery is reduced and the output capability of the solar battery is improved.

The invention relates to a portable fully-integrated DNA on-site inspection minitype total-analysis system detection light path. The portable fully-integrated DNA on-site inspection minitype total-analysis system detection light path is characterized by comprising an exciting light focusing system, a micro-fluidic electrophoresis chip, a fluorescence collecting, focusing and conducting system as well as a fluorescence splitting and detection system. The portable fully-integrated DNA on-site inspection minitype total-analysis system detection light path can divide wide-wavelength fluorescence into a plurality of colored tapes; and besides, a focusing mirror in a wavelength division multiplexer can focus fluorescence beams into micron-order light spots, and is suitable for a low-noise detector and a detector with high noise caused by large sensitive surface. The portable fully-integrated DNA on-site inspection minitype total-analysis system detection light path has a light path structurewhich is provided with a plurality of fluorescence channels, is high in flux and high in flexibility and is simple in process adjustment and low in cost, realizes modular independence, is simple in process adjustment, high in stability and high in extensible degree of electrophoresis channels and fluorescence channels, and can be widely applied in the fields of DNA detection, on-site detection, capillary electrophoresis detection and the like.

The invention discloses an all-polarization-maintaining fiber laser lattice generation apparatus used for a stimulated emission depletion (STED) microscope. The apparatus comprises a half-wave plate, a coupling object lens, a polarization maintaining fiber coupler, a fiber fixing device, a light beam compressing device and a hyper-numerical aperture object lens sequentially arranged along a deexcitation light spreading direction. A polarization controller is arranged in each of a plurality of polarization maintaining fibers at an emitting terminal of the polarization maintaining fiber coupler. The tail end of each of the plurality of polarization maintaining fibers at the emitting terminal of the polarization maintaining fiber coupler goes through the fiber fixing device. The apparatus of the present invention has advantages of a simple and compact structure, convenient adjusting, stable operation, relatively small loss, etc., and can provide a large scale latticed deexcitation laser lattice which is large in cover area and which is with a facula space about a half-wavelength of incident light and consistent shapes of laser faculas for the stimulated emission depletion (STED) microscope.

A thermionic emission device, in particular for use in an x-ray tube, has an indirectly heated primary emitter that is fashioned as a flat emitter with an unstructured primary emission surface, and a heating emitter that is fashioned as a flat emitter with a structured heat emission surface. The primary emitter and the heating emitter each has at least two terminal lugs, and the primary emission surface and the heat emission surface are aligned essentially parallel to one another. The emission device provides an optimally high quality of the focal spot with a simple design and, given high thermal load, an unwanted widening or defocusing of the electron beam is avoided by the terminal lugs of the primary emitter being aligned essentially perpendicular to the primary emission surface and not protruding beyond the primary emission surface in the lateral direction.

The invention discloses a fluorescence imaging system for experimental animals. The system comprises a light source light path and a fluorescence imaging light path; the light source light path and the fluorescence imaging light path share a dichroscope and an objective lens; the light source light path also comprises a coupling optical fiber bundle and a plurality of light emitting units used forrespectively generating fluorescence excitation light or light genetic stimulation light with different wavelengths; the coupling optical fiber bundle comprises a plurality of optical fibers, whereinthe light emitting ends of the coupling optical fiber bundles are tightly arranged, and the light entering ends of the coupling optical fiber bundles are divided into a plurality of sub-bundles; thelight entering ends of the plurality of sub-bundles are respectively matched and coupled with the plurality of light emitting units; a plurality of optical fibers of each bundle of the plurality of sub-bundles are uniformly distributed at the light emitting ends; the optical fibers of the plurality of sub-bundles are mixed and arranged in the coupling optical fiber bundle; and the distance from the light emitting ends of the optical fibers to the rear end face of the objective lens is within 2.5 times of the focal length; and the fluorescence imaging optical path also comprises an imaging unitand an image acquisition unit. The fluorescence imaging system has the advantages of small volume, light weight, good imaging effect and easy expansion, and can realize multi-color fluorescence imaging and in-situ light genetic fluorescence imaging.

The invention discloses a micro arc surface reflector punching backplane, which belongs to the field of solar concentrator reflector back support. The micro arc surface reflector punching backplane comprises an annular shaping part, two arc forming parts, upper and lower two symmetrical arc connection arms, and reinforced supporting arms, wherein the annular shaping part is around one circle of the reflector edge; the two arc forming parts are distributed at the left side and the right side inside the annular shaping part, are symmetrical bilaterally and protrude inwardly in an arc mode; the upper and lower two symmetrical arc connection arms are connected with the central area of the two arc forming parts; the reinforced supporting arms are connected with at least four points distributed uniformly on the circumference of the annular shaping part, and after the reinforced supporting arms are intersected or crossed with the arc forming parts, a diamond or a regular polygon is formed; and the annular shaping part forms a planar structure in a surrounding mode, and the arc forming parts, the connection arms and the reinforced supporting arms form micro arc surfaces sunk towards to the central area relative to the plane. The surface figure precision of a heliostat reflecting surface and the reflecting spot quality are improved, the reflector supporting structure making efficiency and the part size consistency are improved, and the making cost of the heliostat structure is reduced.

The present invention discloses a self-stabilized spectroscopic technology in a four-wave frequency mixing experiment. If the DFWM spectral technology needs to be practical, the stability problem of the light path is solved first. The technology comprises two prefect reflection mirrors and two purpose-made beam splitters. The beam splitter BS1 (1) is arranged in parallel with the perfect reflection mirror M1 (2), and forms an angle of 45 degrees in the direction of the laser beam outputted from a dye laser (3). After split by the beam splitter BS1 (1), the laser beam V is subjected to the perfect reflection mirror M1 (2), the beam splitter BS2 (3), the perfect reflection mirror M1, the beam splitter BS2 and the perfect reflection mirror M2 (4), thereby forming four beams which are of the same light propagation direction and parallel with each other and vertical spatially, and forming a rectangle by the propagation direction. By adjusting the distances between the two perfect reflection mirror (M) and the two purpose-made beam splitters (BS), a square is formed. After focused by a focusing lens f1 (5), the light spots of the two light beams are overlapped. The technology is applied to the field of optics.

The invention relates to a solid laser module, belonging to the field of application of crystal materials in photoelectric field. The solid laser module can be applied in laser ranging systems and positioning systems. The invention mainly comprises a micro solid laser module formed by laser gain medium, passive Q adjusting crystal and an optical parametric oscillator (OPO). The micro solid laser module can be applied in laser ranging systems and positioning systems and solves the detects of the traditional laser ranging device that the volume is large, the assembling and the adjustment are inconvenient, the emitted light wave is long and harmful to eyes of human, the cost is high and the like. The invention has the advantages that the assembling and the adjustment are convenient, the cost is low, no harm is caused to eyes of human, the volume is small, the single-time pulse energy is high, the pulse repetition rate is high and the like.

The invention relates to the technical field of laser measurement, provides a technical scheme for two-dimensional photoelectric level inclination measurement and aims to reduce measuring cost and improve measuring precision. A two-dimensional photoelectric level inclination measuring device comprises a laser, a laser power stabilization control system, a laser temperature drift compensation system, a laser position fine adjustment bolt, a cube reflector, a cubic polarizing beam splitter, a quarter-wavelength wave plate, a wave plate rotary mounting seat, an oil tank, a liquid in the oil tank, a light absorption material at the bottom of the liquid in the oil tank, a lens sleeve, a focusing lens, a position sensitive detector, a height adjustment adaptor, a support rod, an optical auto-collimation system, black flock light absorption paper, four I-V converting circuits and four reverse scale amplifying circuits. The two-dimensional photoelectric level inclination measuring device is mainly applied to two-dimensional photoelectric level inclination measurement.

The invention provides a laser radar detection device. The device comprises a curved surface cover body, a laser, a first lens, a detector and a second lens. An emergent light beam of the laser is emitted to a measured object after passing through the first lens and the curved surface cover body in sequence to form a transmitting light path; the normal direction of the intersection point of the first optical axis of the first lens and the curved surface cover body coincides with the first optical axis; a reflected light beam reflected by the measured object sequentially passes through the cover body and the second lens and enters the detector to form a receiving optical path; and the normal direction of the intersection point of the second optical axis of the second lens and the curved surface cover body coincides with the second optical axis. According to the laser radar detection device provided by the invention, the first optical axis and the second optical axis are set to coincidewith the normal direction of the intersection point of each optical axis and the curved surface; the transmitting light path and the receiving light path are not influenced by the shape of the curvedsurface cover body, astigmatism of the transmitting light path and the receiving light path can be eliminated, the quality and the energy of light spots irradiated to a measured object by outgoing light beams are improved, and therefore, the light energy received by the detector and the detection performance of the laser radar are improved.

The invention relates to an optical structure for realizing spectrocolorimetry through multiplication frequency multiple harmonic waves on yttrium aluminum garnet (YAG) laser. The structure is manufactured as follow: it provides a first interference filter, a second interference filter, a third interference filter, a fourth interference filter. The first and the second interference filter are installed according to right and left axis tilt angle of 45degree from left to right in the laser beam propagation direction of the optical axis. The 1064nm band and 532nm band of laser beams go through the first interference filter, and 1064nm band of laser beams go through the second interference filter, and the fourth interference filter is installed parallel with the reflection beams direction of the first interference filter, and the third interference filter is installed parallel with the reflective beams direction of the second interference filter. The third interference filter reflects 532nm laser beams, and the fourth interference filter reflects 355 nm laser beams.

The invention discloses a white laser light source which comprises a laser emitting unit, a laser scattering unit, a white light combining unit and a white light emitting unit, wherein the white light combining unit comprises a dichroscope, a blue light excitation module and a yellow light excitation module, and the laser scattering unit and the yellow light excitation module are located on the same side of the dichroscope. The white light emitting unit and the blue light excitation module are positioned on the same other side of the dichroscope; the blue light excitation module comprises a blue light lens and a blue light ceramic chip which are sequentially arranged in the laser beam propagation direction, and the yellow light excitation module comprises a yellow light lens and a fluorescent wheel which are sequentially arranged in the laser beam propagation direction. The mode that the yellow light lens and the fluorescent wheel are arranged in the yellow light excitation module is adopted, namely, the fluorescent wheel is adopted as a yellow light excitation component, the saturation phenomenon of a fluorescent piece is solved, the technical purpose of a high-power light source is achieved, meanwhile, the focusing effect of the yellow light lens is combined with the fluorescent wheel, and the optical density is improved.

The invention discloses a device for improving spot quality of non-linear crystal frequency-conversion laser. The device comprises a non-linear crystal unit and a walk-off compensation crystal unit, wherein the non-linear crystal unit comprises a non-linear crystal which is composed of beta-barium borate crystals or caesium lithium borate; the walk-off compensation crystal unit comprises an uniaixal crystal which is composed of yttrium vanadate crystals or alpha-barium borate crystals. The device for improving the spot quality of the non-linear crystal frequency-conversion laser performs compensating and shaping treatment on laser spots frequency-converted by the non-linear crystal through the walk-off compensation crystal to obtain round laser spots under the premise of not losing the optical power of converting laser, thereby improving the spot quality. Meanwhile, the device for improving the spot quality of the non-linear crystal frequency-conversion laser is simple in operation, significant in effects, low in cost and capable of solving the technical problem of quality reduction of output laser spots.

The invention relates to the field of LED light source illumination, and specifically relates to a secondary light distribution lens and a device for a discrete LED light source. A lens incident plane comprises an incident lateral side and an incident end face. The incident end face is a composite plane comprising a main incident end face and a secondary incident end face. The secondary incident end face has a curved face protruding toward the bottom of the lens; and the secondary incident end face is arranged on the main incident end face. The lens is applicable to the discrete LED light source, wherein the secondary incident end face is used corresponding to each secondary light source of the light source. The secondary incident end face converts off-axis lights emitted from the secondary light sources in an off-axis status with respect to the central axis of the lens body into on-axis lights or paraxial lights of the secondary incident end face, accordingly increasing light intensities of lights having small angles. A secondary small convex lens array is densely distributed on the incident end face to uniform the lights, thereby allowing the illumination field of the discrete light source modulated by the lens to reach an ideal effect.

The invention belongs to the technical field of laser, and provides a 213nm ultraviolet light output method and system. The method comprises the steps of controlling a laser to generate a laser pulse, enabling the laser pulse to generate 532nm frequency-doubled light after passing through a frequency doubling crystal, and enabling the 532nm frequency-doubled light and residual 1064nm fundamental frequency light to generate 266nm laser pulse after passing through a quadruplicated frequency crystal, and enabling the 266nm laser pulse and the residual 1064nm fundamental frequency light to be irradiated to a frequency quintupled crystal so as to generate 213nm ultraviolet light. According to the method provided by the invention, the problem that polarization needs to be converted in the process of generating the 213nm laser pulse by performing sum frequency on the frequency doubled light and the frequency tripled light can be avoided.

The invention relates to a flatly-foldable vertical beam-combined type laser tube. The flatly-foldable vertical beam-combined type laser tube comprises a gas storage tube, a gas return tube, a film polarizer, a reflecting lens and at least four sets of tube components, wherein each set of tube component is connected with the gas storage tube through the gas return tube; at least two sets of tube components are arranged in the first plane in parallel; at least two sets of tube components are arranged in the second plane perpendicular to the first plane; the adjacent tube components in the first plane are connected through a turn-back lens to enclose a first S-shaped pipeline; and the adjacent tube components in the second plane are connected through a turn-back lens to enclose a second S-shaped pipeline. The flatly-foldable vertical beam-combined type laser tube has the advantages that two beams of strong laser which are generated in the two vertical planes and has the same emergent direction and opposite polarization directions are combined into one beam of laser with high power and high circular polarization degree through the film polarizer and the reflecting lens; the laser beam has high power; facula quality is high; the laser beam is slimmed after being focused; the laser processing speed is high; the laser processing effect is good; and the manufacturing cost is relatively low.

The invention discloses a 213nm laser. The 213nm laser comprises a 1064nm laser, a frequency doubling crystal, a frequency quadruplicating crystal and a frequency quintupling crystal, wherein the 1064nm laser, the frequency doubling crystal, the frequency quadruplicating crystal and the frequency quintupling crystal are connected in sequence; the 1064nm laser is used for generating a 1064nm laser pulse; the frequency doubling crystal receives 1064nm laser pulses emitted by the 1064nm laser and is used for converting part of 1064nm laser into 532nm frequency doubling light; the frequency quadruplicating crystal is used for converting the 532nm frequency doubled light into 266nm laser pulse; and the frequency quintupling crystal is used for converting the 1064nm laser and the 266nm laser pulse into the 213nm laser. The 213nm laser can avoid the problem that polarization needs to be converted in the process of generating 213nm laser pulses by performing sum frequency on the frequency doubled light and the frequency tripled light.

The invention relates to a preparation method of a spatially staggered mixed material film and an application thereof in an achromatic superlens. The method comprises the following steps that firstly, a multi-sector spatial deposition mask is processed by using a thin silicon wafer, partitioned covering is carried out by using the multi-sector mask, and a first dielectric material film is deposited on a super lens substrate; after the mask and redundant materials are removed through an etching technology, another multi-sector mask is replaced, and a second dielectric material film with the same thickness is deposited on the remaining sectors; and finally, a nano structure of the superlens is processed through micro-nano technologies such as electron beam lithography and the like. The invention provides a new thought for preparing the high-efficiency dual-wavelength achromatic superlens and applying the high-efficiency dual-wavelength achromatic superlens to two-photon microscopic imaging and two-photon STED super-resolution micro endoscopic imaging, the superlens realizes high-efficiency confocal of infrared band exciting light and visible band fluorescent light or loss light, therefore, the method is expected to be used in super-resolution micro endoscopic imaging of deep biological tissues of living bodies, and dynamic real-time super-resolution imaging with low invasion damage and high resolution is further realized.

The invention discloses a parallel direct writing device based on ten-thousand-beam independent controllable laser dot matrix generation. The device mainly comprises four identical light paths; each light path comprises a core element digital micromirror array DMD and a core element micro-lens array MLA and is used for generating thousand-beam independent controllable inscribing dot matrixes; the DMD in each light paths equally divides an effective pixel area into M * N sub-arrays; one sub-array corresponds to one sub-light spot; the M * N sub-light spots emitted from the DMD coincide with the M * N micro-lens of the MLA in space to generate an M * N thousand-beam focus array, and the M * N thousand-beam focus array is finally imaged on the focal plane of the objective lens; the generation of the ten-thousand-beam inscribing dot matrix is finally realized through the splicing of the four thousand-beam dot matrixes; the high-quality complex three-dimensional microstructure can be quickly processed; and the method can be applied to the fields of super-resolution photoetching and the like.