83 results about "Ultraviolet laser light" patented technology

A color laser display apparatus which contains a laser light source which emits ultraviolet laser light, a modulation unit which modulates the ultraviolet laser light, a display unit which includes a fluorescent screen, and a scanning unit which two-dimensionally scans the fluorescent screen with the ultraviolet laser light. The fluorescent screen includes, for each pixel, red fluorescent material which emits red light in response to the ultraviolet laser light, green fluorescent material which emits green light in response to the ultraviolet laser light, and blue fluorescent material which emits blue light in response to the ultraviolet laser light. The laser light source may be, for example, a semiconductor laser or a fiber laser.

A color laser display apparatus which contains a laser light source which emits ultraviolet laser light, a modulation unit which modulates the ultraviolet laser light, a display unit which includes a fluorescent screen, and a scanning unit which two-dimensionally scans the fluorescent screen with the ultraviolet laser light. The fluorescent screen includes, for each pixel, red fluorescent material which emits red light in response to the ultraviolet laser light, green fluorescent material which emits green light in response to the ultraviolet laser light, and blue fluorescent material which emits blue light in response to the ultraviolet laser light. The laser light source may be, for example, a semiconductor laser or a fiber laser.

An apparatus and method applicable for generating ultraviolet laser light having a wavelength in the 200-nm range and / or 250-nm range; in some embodiments, using a single fiber laser pump source (in some embodiments, a pulsed source). In some embodiments, the invention provides methods of generating 250-nm or 200-nm photons using a mode-locked 1000-nm fiber laser and efficient 4th / 5th harmonic frequency up-conversion. In other embodiments, the invention uses continuous wave (cw) single-frequency fiber lasers and external resonant frequency conversion. In still other embodiments, the invention uses cw single-frequency optically-pumped semiconductor lasers (OPSLs) and electrically driven vertical-cavity surface-emitting lasers (VCSELs) and externally resonant frequency conversion. All of these produce both of the ultraviolet wavelengths of interest

A method for fabricating fiber Bragg gratings including: scanning a photosensitive optical fiber with ultraviolet laser light in a longitudinal direction of the optical fiber by means of a phase mask method, thereby forming periodic refractive index modulation structure in a core of the optical fiber in the longitudinal direction; and instantaneously moving a phase mask used in the phase mask method by a predetermined distance in the longitudinal direction, thereby forming a phase shift portion in the periodic refractive index modulation structure formed in the core of the optical fiber, when a radiation position of the ultraviolet laser light reaches a predetermined position, in the middle of the scanning step using the ultraviolet laser light.

An apparatus and method applicable for generating ultraviolet laser light having a wavelength in the 200-nm range and / or 250-nm range; in some embodiments, using a single fiber laser pump source (in some embodiments, a pulsed source). In some embodiments, the invention provides methods of generating 250-nm or 200-nm photons using a mode-locked 1000-nm fiber laser and efficient 4th / 5th harmonic frequency up-conversion. In other embodiments, the invention uses continuous wave (cw) single-frequency fiber lasers and external resonant frequency conversion. In still other embodiments, the invention uses cw single-frequency optically-pumped semiconductor lasers (OPSLs) and electrically driven vertical-cavity surface-emitting lasers (VCSELs) and externally resonant frequency conversion. All of these produce both of the ultraviolet wavelengths of interest.

A system and method are disclosed for the simultaneous optical disinfection and detection of biological particles in a flowing fluid, such as air or water, medium. A light source for irradiating the flowing medium is a dual wavelength laser element simultaneously emitting a visible laser beam and an ultraviolet laser beam. In particular, a laser diode may generate a first visible laser light beam, and a second ultraviolet laser light beam may be generated by passing the first laser light beam through a frequency doubling crystal. Optical detectors measure scattering, fluorescence and / or transmission of the laser light beams from the air or water medium to determine the presence of biological particles in real-time.

The pattern defect inspection apparatus and its method of the present invention comprises: a recipe setting unit for setting an inspection recipe and / or a review recipe; an illumination optical system including: a laser light source for emitting ultraviolet laser light; a quantity-of-light adjusting unit for adjusting a quantity of the ultraviolet laser light emitted from the laser light source; and an illumination range forming unit for forming on a sample an illumination range of the ultraviolet laser light; a coherence reducing system; and a detection optical system including: a condensing optical system; a diffracted-light control optical system; and a detecting unit.

A laser device is disclosed that provides at least an ultraviolet laser beam and preferably both an ultraviolet laser beam and a visible laser beam. The laser device includes a semiconductor laser device (e.g. a laser diode) to generate visible laser light which is coupled into a frequency doubling crystal taking the form of a single crystal thin film frequency-doubling waveguide structure. The single crystal thin film frequency-doubling waveguide converts a portion of the visible light emitted by the laser diode into ultraviolet light. Both visible and ultraviolet laser light is emitted from the waveguide. As an example, the single crystal thin film frequency-doubling frequency doubling waveguide includes a frequency doubling crystal region composed of β-BaB2O4 (β-BBO), a cladding region composed of materials that are transparent or nearly transparent at the wavelength of the ultraviolet laser light beam and a supporting substrate composed of any material.

A laser microscope includes: a light source that emits deep ultraviolet laser light to be irradiated on a sample; a limiting device that sets a limit to an intensity of the deep ultraviolet laser light irradiated on the sample; a detection device that detects the deep ultraviolet laser light having been reflected from the sample; a storage device that stores first information related to damage to the sample corresponding to the intensity of the deep ultraviolet laser light; and a control device that controls the limiting device based upon the first information when a sample damage limit is input from outside.

The invention relates to the technical field of liquid-crystal display and discloses a seal agent curing device. The seal agent curing device comprises an ultraviolet laser and at least one optical fiber set; each optical fiber set comprises at least one ultraviolet optical fiber connected with the light-emitting end of the ultraviolet laser, and the light-emitting end of each optical fiber set faces a precured seal agent on a substrate. Due to the fact that the ultraviolet laser and ultraviolet optical fibers used for transmitting ultraviolet laser light are adopted, ultraviolet light output by the light-emitting end of each optical fiber set can directly irradiate the precured seal agent, energy waste caused by blocking the ultraviolet light through an existing mask plate is avoided, and the utilization rate of light energy is greatly enhanced. Besides, the mask plate does not need to be adopted in the seal agent curing device and does not need to be replaced when the substrate is replaced by a different substrate. Therefore, production efficiency can also be greatly improved.

The invention provides a Raman spectrum method for identifying black handwriting, wherein, the method adopts ultraviolet laser light as an excitation light source; fluorescence is avoided through adopting ultraviolet laser light which directly irradiates handwriting; the Raman spectrum signals of corresponding handwritings on a detected material and a sample are respectively collected; whether the ink compositions of the handwritings are different or not can be identified from the difference of Raman peaks through comparison; moreover, the different written times of the handwritings can be identified through the relative variation of corresponding Raman peak strength. As for black handwriting containing carbon black, the forming time can be judged according to the ratio of the integral area of the Raman characteristic peak at 1600cm<-1> and the integral area of newly written handwriting at the same position. The method which is of great convenience realizes objective and actual identification without any damage on identified handwriting.

The invention provides a coloring light-sensitive resin composition, which has high line width stability relative to development and can form pattern with high resolution, as well as a method for forming patterns using ultraviolet ray laser exposure, and a method for producing an optical filter using the pattern-forming method, a color filter and a display device. The invention especially provides a coloring light-sensitive resin composition which is suitable for forming coloring pixel of color filter or the like, as well as a method for forming patterns using ultraviolet ray laser exposure. The coloring light-sensitive resin composition provided by the invention contains: (A) olefinic bond type unsaturated compound, (B) adhesive resin, (C) colorant, as well as (D) light polymerization initiator shown in the general formula (I). In the general formula (I), R and X respectively and independently represent a monovalent substituent, as well as Y respectively and independently represent adivalent organic group, and Ar represents an aromatic group. N is an integer from 0-5.

The invention is applicable to the technical field of sterilization, and provides a sterilization system, which comprises an ultraviolet laser and a scanning device which receives the ultraviolet laser light which is generated by the ultraviolet laser to scan and sterilize the peripheral environment. The sterilization system receives the ultraviolet laser light which is generated by the ultraviolet laser, and utilizes the ultraviolet laser light to scan and sterilize the peripheral environment, wherein the laser light has good directionality, concentrated energy and very small energy variation when the distance is increased, so the low power ultraviolet laser can be adopted (the average power of the laser is low, is only few milliwatts to dozens of milliwatts, and is lower by few magnitudes compared with an ultraviolet light with dozens of milliwatts; and the spectral range of the ultraviolet laser light is narrow, and the energy consumption of the ultraviolet laser light is greatly reduced compared with intensive pulse lights), the purpose of sterilizing a whole large environment or an oversized environmental space through scanning laser beams is realized, and accordingly, the air is purified. The sterilization system is an important breakthrough of the sterilization technology, and has an important significance in controlling and preventing transmitted disease.

A method for fabricating fiber Bragg gratings including: scanning a photosensitive optical fiber with ultraviolet laser light in a longitudinal direction of the optical fiber by means of a phase mask method, thereby forming periodic refractive index modulation structure in a core of the optical fiber in the longitudinal direction; and instantaneously moving a phase mask used in the phase mask method by a predetermined distance in the longitudinal direction, thereby forming a phase shift portion in the periodic refractive index modulation structure formed in the core of the optical fiber, when a radiation position of the ultraviolet laser light reaches a predetermined position, in the middle of the scanning step using the ultraviolet laser light.

The invention discloses a method for preparing a micro-fluidic chip template. The method comprises the following steps that S1, photoresist is used for coating a plane substrate, and the coating thickness of the photoresist is 1 micron to 100 microns; S2, the photoresist coating the plane substrate is subjected to prebaking treatment for volatilizing solvents inside the photoresist, so that the photoresist is cured, and the surface becomes flat; S3, a designed pattern of the micro-fluidic chip template is sent to an ultraviolet laser; ultraviolet laser light is focused into a beam of light spot in the laser; according to the designed pattern, the light spot is driven to move for directly performing exposure on the photoresist covering the substrate in the step S2; S4, the unnecessary photoresist is cleaned away, and the micro-fluidic chip template is obtained. The method has the advantage that through a laser direct writing technique and a photoetching technique, the micro-fluidic chip template is fast and flexibly processed, so that the chip processing cost can be effectively reduced; the chip processing period is shortened.

A laser device is disclosed that provides at least an ultraviolet laser beam and preferably both an ultraviolet laser beam and a visible laser beam. The laser device includes a semiconductor laser device (e.g. a laser diode) to generate visible laser light which is coupled into a frequency doubling crystal taking the form of a single crystal thin film frequency-doubling waveguide structure. The single crystal thin film frequency-doubling waveguide converts a portion of the visible light emitted by the laser diode into ultraviolet light. Both visible and ultraviolet laser light is emitted from the waveguide. As an example, the single crystal thin film frequency-doubling frequency doubling waveguide includes a frequency doubling crystal region composed of β-BaB2O4 (β-BBO), a cladding region composed of materials that are transparent or nearly transparent at the wavelength of the ultraviolet laser light beam and a supporting substrate composed of any material.

The invention discloses a method for obtaining high-power ultraviolet laser light, which is realized by an annular cavity structure. The annular cavity structure is surrounded by at least three endoscopies, wherein the first endoscopy and the second endoscopy are oppositely arranged on the optical axis of an all solid-state laser, the normal lines of the first endoscopy and the second endoscopy and the optical axis respectively form an angle of 1-89 degrees; double frequency multiplication crystals and multiple frequency multiplication crystals are arranged between the first endoscopy and thesecond endoscopy; the other endoscopies are arranged above one side of the double frequency multiplication crystals and multiple frequency multiplication crystals; the third endoscopy is arranged on piezoelectric ceramics; base-frequency laser light emitted from the all solid-state laser is transmitted to the double frequency multiplication crystals to be subjected to double frequency multiplication by the first endoscopy, and triple frequency multiplication or quadruple frequency multiplication is carried out by the multiple frequency multiplication crystals to obtain the ultraviolet laser light; the double frequency multiplication laser light which is not converted is subjected to cycling frequency multiplication along each frequency multiplication crystal and each endoscopy in the annular cavity structure to generate high-power ultraviolet laser light; and the high-power ultraviolet laser light is output by any endoscopy. Thus, the double frequency multiplication laser is utilized by 100%, the ultraviolet conversion efficiency is improved, the crystal damage is avoided, and the high-power ultraviolet laser light can be obtained under certain injection power.

The invention belongs to the technical field of laser biology, and particularly discloses an ultraviolet laser sterilization and disinfection system and method based on a conveyor belt. The system comprises a conveyor belt device and an ultraviolet laser sterilization and disinfection device, wherein the conveyor belt device comprises two conveyor belts arranged at intervals; the ultraviolet lasersterilization and disinfection device comprises ultraviolet laser sterilization and disinfection modules arranged above the conveyor belts and ultraviolet laser sterilization and disinfection modulesarranged below a gap between the two conveyor belts; each ultraviolet laser sterilization and disinfection module comprises an ultraviolet laser, a beam expanding and turning optical path and a beamshaper; the ultraviolet lasers are used for emitting ultraviolet laser; the beam expanding and turning optical paths are used for expanding light spots of the ultraviolet laser; and the beam shapers are used for shaping the expanded ultraviolet laser into linear ultraviolet laser beams at a specified angle. The laser beam divergence angle is small, the optical power density is high, the system canaccurately sterilize and disinfect the place where the laser beam is located, an object can be rapidly and efficiently sterilized and disinfected automatically in a full-coverage manner, and the system is efficient, safe and effective.

The invention relates to an ultraviolet laser sterilization system, comprising an ultraviolet laser module and a scanning module. The ultraviolet laser module emits an ultraviolet laser light with a wavelength ranging from 200 nm to 280 nm. The scanning module includes a plurality of reflectors for receiving the ultraviolet laser light, and a controller for controlling rotation of the reflectors to adjust an angle of emergence of the ultraviolet laser light for sterilizing a target.

The invention improves the processing performance in a grooving process and a cutting process of a semiconductor material and a ceramic material by using laser beams. A laser processing method and a laser processing apparatus are provided for performing a grooving process or a cutting process by pulse-irradiating an inorganic object to be processed with ultraviolet laser beams. The deeper the processing depth of the grooving process or the cutting process becomes or the higher the scanning speed of the ultraviolet laser beams becomes, the longer the pulse width of the ultraviolet laser beams is set. Thus, compared with the case wherein the average output power is increased, the processing performance can be remarkably improved.

The invention discloses a method for revealing and extracting a scene potential fingerprint. The method is characterized by comprising the following steps of: 1, irradiating a short-wave ultraviolet laser light which has a wavelength of 266 nm and is output by a neodymium doped yttrium aluminium garnet (ND-YAG) ultraviolet laser serving as a light source to a detection material on which the potential fingerprint is reserved; 2, filtering environmental parasitic lights by using a band-pass glass filter with the central wavelength of 266 nm, and transmitting a laser image of 266 nm reflected onthe detection material to an ultraviolet camera; and 3, receiving and recording the laser image with the wavelength of 266 nm transmitted by the band-pass glass filter by the ultraviolet camera. The invention also discloses a device for revealing and extracting the scene potential fingerprint. The invention can solve the problems of difficult revealing and extraction of invisible or indistinguishable traces and physical evidences in a criminal case scene, is particularly applicable to the revealing and extraction of the potential fingerprint on a surface of a smooth non-permeable detection material such as glass and smooth paper, and has the advantages of low background interference, high contrast and high revealing rate.

The invention relates to a method for producing deep ultraviolet laser light through visible laser direct frequency conversion and an all-solid-state deep ultraviolet laser. According to the method, a pumping source pumps a gain medium to directly produce visible light, ultraviolet light is obtained through a double-frequency crystal according to the visible light, and laser light in a deep ultraviolet band is obtained through a triple-frequency crystal. The all-solid-state deep ultraviolet laser comprises a pumping source, a focusing system, an input mirror, a laser gain medium, a double-frequency crystal, a plane-concave output mirror, a triple-frequency crystal, and a reflective mirror. The device has the advantages of compact structure, simple operation, small size, and easy integration. The method for acquiring deep ultraviolet laser light has the characteristics of concise process and high conversion efficiency.

The invention discloses an outer control ultraviolet laser power stabilizing system, mainly for solving the problem that the existing laser power stabilizing system is low in stability. The outer control ultraviolet laser power stabilizing system comprises an ultraviolet laser light source system (1), an ultraviolet environment control room (2), an electrooptical modulator (22), a sampler (26), an optical chopper (3), an optical filter (4), a photoelectric preamplifying module (5), a feedback control module (6), an electrooptical modulation driver (7) and a laser power detector (8), wherein the ultraviolet laser light source system outputs ultraviolet laser power of which needs to be stabilized, the ultraviolet laser the power of which needs to be stabilized passes through the electrooptical modulator (22), the ampler (26), the optical chopper (3) and the optical filter (4) and vertically reaches an photoelectric detector to generate electric signals; the electric signals generate feedback signals through the feedback control module, to control the electrooptical modulation driver to adjust the electrooptical modulator to stabilize the ultraviolet laser power. The outer control ultraviolet laser power stabilizing system is high in stability, and is suitable for stabilizing the ultraviolet laser power with wave bands of 250-400nm.

The invention relates to a high-spatial-resolution photoemission electron microscope (PEEM) with an ultraviolet or deep ultraviolet laser light source, comprising an ultraviolet or deep ultraviolet laser and a PEEM, wherein an optical path of laser emitted by the ultraviolet or deep ultraviolet laser is vertically incident to a sample stage of the PEEM. (Deep) ultraviolet laser with fixed wavelength or continuous wavelength and energy higher than 5eV is applied to the PEEM; the laser arouses photoelectrons on the surface of a solid in a unique way of being vertically incident to the surface of a sample through a laser and PEEM connecting system; surface photoemission electrons are imaged by using an electron optical system so that surface image information is obtained; and dynamic processes including surface chemical reaction and a surface growth process on the surface of the solid are researched by applying the deep ultraviolet laser, so that high-spatial-resolution, in-situ and real-time research and observation of the dynamic processes of the surface are realized.

The invention provides an ultraviolet laser disinfection channel. The ultraviolet laser disinfection channel comprises an air inlet channel, disinfection channel bodies, an air outlet channel, ultraviolet laser light sources and integrating mirrors, wherein the air inlet channel, the disinfection channel bodies and the air outlet channel are sequentially arranged and communicate along an air supply direction; the ultraviolet laser light sources are used for emitting ultraviolet laser beams; the integrating mirrors are used for changing the light spot shapes of the ultraviolet laser beams; theultraviolet laser beams enter the disinfection channel bodies at preset angles after passing through the integrating mirrors and form rectangular light spots on the inner walls of the disinfection channel bodies; the inner walls of the disinfection channel bodies are provided with reflecting materials; and the rectangular light spots are reflected by the inner walls of the disinfection channel bodies and transmitted forwards. According to the ultraviolet laser disinfection channel, compared with the prior art, through arranging the devices such as the ultraviolet laser light sources and the integrating mirrors, not only is the difficulty of large-flow airflow disinfection in the prior art overcome, but also the corresponding solutions are provided according to the disinfection requirementsof customers at the same time.

The invention, which belongs to the field of traffic management system optimization, relates to a bridge load detection and safety control device that is especially arranged at a one-way street of a highway or an urban express way. A laser emitting device is installed at a pole at the roadside to emit argon-fluoride ultraviolet laser to realize diffuse reflection on the road surface; a camera arranged at the same side of the laser emitting device shoots a license plate number of a driving vehicle; a light-transmitting screen of a laser receiving device being opposite to the laser emitting device receives light of diffuse reflection; a day-blind photosensitive resistor behind the screen detects the change of the intensity of the argon-fluorine ultraviolet laser light after diffuse reflection on the road surface when a vehicle passes by so as to change the own resistance; a controller receives resistance value information of the laser receiving device and thus calculates the vehicle weight value of the vehicle passing by the section; and a display screen in front of the road displays the weight value and matched license plate information. The bridge load detection and safety controldevice has a simple structure and intelligent and effective effects and has the great application value for the traffic management system optimization.

The invention discloses an ultraviolet pure rotational Raman temperature measurement laser radar system. The laser radar system is composed by a launcher unit, an optical receiving and double grating polychromator unit, a photoelectric conversion and control unit. The launcher unit adopts a solid-state laser injected by seed to output an extremely narrow line width of 354.7 nm ultraviolet laser light and directs the ultraviolet laser light to the zenith. The optical receiving and double grating polychromator unit is used for collecting the back scattered light from the atmosphere, and extracting the pure rotational Raman spectrum from the scattered spectrum by using 0.2nm of the spectral resolution, then obtain the information of atmospheric temperature by using the different intensity of the pure rotational Raman spectrum with the temperature. The photoelectric conversion and control unit ensure an orderly operation of the whole radar system. In the ultraviolet pure rotational Raman temperature measurement laser radar system, the radar works in the ultraviolet band so that the solar background light can be significantly reduced, which can be used for the measurement of atmospheric temperature throughout the day.

A method and an apparatus for the treatment of either endo-cavital infections or abnormal surface tissue conditions, particularly destructive bacterial infections, post major invasive surgery abscesses and skin infections such as vitiligo and psoriasis. If required, a catheter system is used, which allows the simultaneous drainage of an infected locus and irradiation of the infected locus with laser-generated pulsed ultraviolet light. The laser light wavelength is chosen so as to require radiation, which is lethal to the microorganisms causing the infection, at the lowest possible dose which will provide ameliorative therapty. Alternatively, a diode-pumped solid state Raman laser device is used which can be configured to provide in sequence a selected number of output wavelengths in the ultraviolet spectral range.