245 results about "Far-infrared laser" patented technology

Method and systems for eye surgery for the treatment of presbyopia, ocular hypertension and glaucoma and other soft tissue surgeries are disclosed. System design parameters of lasing crystals (Nd:YAG, Nd:YLF, Er:YAG and Er:YSGG), nonlinear crystals (KTP, BBO, LBO), laser cavity configuration and energy delivery means are disclosed for diode-laser-pumped lasers with output wavelength at UV (263 or 266 nm), green (527 or 523 nm), and mid-IR (2.78 or 2.94 microns). Dual function of ablation and coagulation is proposed by a mode control means. The preferred diode-laser includes a wavelength at about 0.75 to 0.98 microns with power about 15 to 40 W and used in a side-pumping configuration to generate UV or IR having an energy per pulse about 3 to 30 mJ, power of about 0.1 to 1.5 W and operated at free running mode (IR laser) or pulsed mode (UV laser).

The invention discloses a method for detecting textile structures and dyeing defects through infrared laser, which comprises projecting the infrared laser on a textile sample, collecting infrared laser transmitting images of the textile sample, displaying the infrared laser transmitting images of the textile sample on a displaying component. A device for detecting textile structures and dyeing defects through infrared laser is composed of a semiconductor laser and a infrared photography device, wherein the semiconductor laser and the infrared photography device are arranged fixedly on two ends of an optical path, a textile sample holdfast is arranged in the optical path which is between the semiconductor laser and the infrared photography device, a piece of condensing lens is arranged on the optical path which is between the semiconductor laser and the textile sample holdfast, a piece of object lens is arranged on the optical path which is between the textile sample holdfast and the infrared photography device, the infrared photography device is connected with a display. The infrared laser transmitting images of textile materials with grey scale and contrasting chrominance are displayed on the displaying component. The infrared laser transmitting images are provided for technological analysis and identifications.

A method for doping semiconductors used for far infrared lasers with non-hydrogenic acceptors having binding energies larger than the energy of the laser photons. Doping of germanium or silicon crystals with beryllium, zinc or copper. A far infrared laser comprising germanium crystals doped with double or triple acceptor dopants permitting the doped laser to be tuned continuously from 1 to 4 terahertz and to operate in continuous mode. A method for operating semiconductor hole population inversion lasers with a closed cycle refrigerator.

An accessory module is installed between a weapon accessory (optical sighting device) and its corresponding mounting interface. The accessory module includes a body having a lower surface which is configured and arranged to mate with the corresponding upper surface of the mounting interface and an upper surface that includes a seat that is configured and arranged to conform to and receive the outer surface of the weapon accessory. The accessory module includes electronic accessories, such as for example, a flashlight configured to emit visible white light, colored light and / or infrared light. Further, the accessory module may include laser devices therein such as a laser sight, an infrared laser for night vision targeting, or a laser range finder device. The accessory module may also be configured to include a taser and / or a compact video camera.

The invention relates to a near-infrared laser ranging method based on a linear sensitive photon detector, and belongs to laser ranging and weak infrared light detecting types. A ranging system achieves the linear sensitive photon detection on the basis of the external gain based on the pulse laser flight time ranging method and through the combination of a PIN photodiode and an EDFA, echo light with different intensities can be detected, accordingly, the distance information is obtained, meanwhile, the materials of a detected target is judged according to the specific number of returned photons, and precise measurement of different distances and different targets is achieved. Compared with other sensitive photon detection, the horizontal return light linear detection from a single photon to multiple photons can be achieved by adjusting the gain multiple of the EDFA, the photon number can be detected in a distinguishable mode, the working range of the laser ranging is greatly enlarged, the near-infrared laser ranging method meets the requirements for near, medium and remote laser ranging at the same time, and the fast distinguishing of the detected target material is achieved.

A system remotely detects a gas leakage from a target in an area. The gas detection system includes two light sources: a mid-infrared (mid-IR) laser for detecting absorbance of the gas in the area, and a visible laser for detecting a pathlength of the mid-IR laser. The absorption is determined based on the relative amplitude difference of the emitted and reflected mid-IR light beams. The mid-IR laser may use wavelength modulation techniques to improve the absorption determination. The pathlength is determined by comparing a phase between the emitted visible light beam and the measured visible light beam. The gas detection system calculates a concentration of the gas in the area using the determined absorption and pathlength. The gas detection system may be attached to an unmanned aerial vehicle.

An accessory module is installed between a weapon accessory (optical sighting device) and its corresponding mounting interface. The accessory module includes a body having a lower surface which is configured and arranged to mate with the corresponding upper surface of the mounting interface and an upper surface that includes a seat that is configured and arranged to conform to and receive the outer surface of the weapon accessory. The accessory module includes electronic accessories, such as for example, a flashlight configured to emit visible white light, colored light and / or infrared light. Further, the accessory module may include laser devices therein such as a laser sight, an infrared laser for night vision targeting, or a laser range finder device. The accessory module may also be configured to include a taser and / or a compact video camera.

The invention discloses a construction method of an infrared laser in ultra quantum conversion limit based on optic superlattice. By utilizing the optic superlattice of the structure, the structure of the optic superlattice provides two reciprocal lattice vectors simultaneously, wherein one reciprocal lattice vector is used for compensating phase mismatch in an OPO (optical parametric oscillation) process from near infrared to intermediate infrared, and the other reciprocal lattice vector is used for compensating phase mismatch in a signal light pump OPA (optical parametric amplification) from the OPO process, in the process, the intermediate infrared laser which is generated in the OPO process can be amplified further, thus more efficient intermediate infrared laser output of the ultra quantum conversion limit is obtained; and a commensurability ratio double periodic structure is adopted for the optic superlattice, thus the more efficient intermediate infrared laser of the ultra quantum conversion limit is obtained.

Presbyopia is treated by a system using various lasers to remove a portion of the scleral tissue and increase the accommodation of the presbyopic patient's eye. Stable accommodation is achieved by the filling of the sub-conjunctiva tissue to the laser-ablated scleral areas. The proposed laser wavelength ranges from ultraviolet to infrared of (0.15-0.36) microns, (0.5-1.4) microns and (0.9-3.2) microns. Both scanning and fiber delivered systems are proposed to generate the ablation patterns. Laser ablation of the sclera may be conducted with or without opening the conjunctiva layer.

The invention discloses an intermediate / far infrared super-continuum spectrum fiber laser which relates to the field of laser photoelectrons. The intermediate / far infrared super-continuum spectrum fiber laser comprises a pulse fiber laser, a quartz photonic crystal fiber, a passive intermediate infrared chalcogenide glass fiber, a passive intermediate / far infrared chalcogenide glass fiber, a filter, an excitation source and a rare earth ion doped chalcogenide glass fiber, wherein a super-continuum spectrum laser is generated by the pulse laser emitted by the pulse fiber laser through the quartz photonic crystal fiber to excite the passive intermediate infrared chalcogenide glass fiber so as to generate an intermediate infrared super-continuum spectrum laser; the intermediate infrared super-continuum spectrum laser is filtered by the filter; the filtered intermediate infrared super-continuum spectrum laser is used as a seed resource laser and amplified through the rare earth ion doped chalcogenide glass fiber; and the amplified intermediate laser is used for exciting the passive intermediate / far infrared chalcogenide glass fiber so as to generate an intermediate / far infrared super-continuum spectrum laser with a wavelength of 5-14 micrometers. According to the intermediate / far infrared super-continuum spectrum fiber laser, the shortage of light sources of intermediate / far infrared lasers is solved and the output of the intermediate / far infrared super-continuum spectrum laser is realized.

The invention provides a vein viewing system. The vein viewing system comprises a control system (1), visible laser (2), near infrared laser (3), a MEMS (Micro Electro Mechanical System) scanning galvanometer system (4) and an infrared detector (5). Near infrared light is used for carrying out two-dimensional scanning by controlling the MEMS scanning galvanometer system (4); then by being input into the control system (1), an infrared scattered light signal measured by the infrared detector (5) is read into an image input buffering part of the control system (1); the image processing is carried out by an image processing part; a processed image is transmitted to a 2D (two-dimensional) imaging controller (10) to control the projection imaging of the visible laser; and a vein image with the ratio of 1:1 with a real object is projected onto a tested skin surface and the projection of the vein image is coincident with the actual position of the vein on the tested skin surface in the horizontal direction. By the vein viewing system provided by the invention, the accuracy that medical personnel positions the vein is greatly improved, the medical dispute caused by misoperation or repeated operation is reduced, the pain of a patient is reduced and the medical time is shortened.

The invention discloses a rotating mirror scanning dual waveband semiconductor laser sterilization system for a medical device, which comprises an infrared semiconductor laser, an ultraviolet semiconductor laser, optical fiber collimators, a zooming coupled lens assembly, an infrared beam scanning rotating mirror and an ultraviolet beam scanning rotating mirror. The system can be applied in various modes and occasions and can make important contribution to reduce a fatality rate and a disability rate and restore health as soon as possible in the field of medical treatment and intensive care infection prevention and treatment; the system achieves quick and thorough sterilization and has high efficiency by adopting an intense laser sterilization mode and integrating the advantages of a strong heating effect of an infrared laser and a strong protein molecular ionization damage effect of an ultraviolet laser; and the system is portable and reusable, is not contacted with a human body, has no obvious direct or indirect influence on the human body and is convenient to realize.

Laser devices are presented in which a graphene saturable absorber and an optical amplifier are disposed in a resonant optical cavity with an optical or electrical pump providing energy to the optical amplifier.

A traveling wave ring-resonator is configured to deliver CW single-longitudinal-mode radiation having a fundamental wavelength characteristic of an optically pumped gain-element in the resonator. The delivered fundamental-wavelength radiation is the output-radiation of the resonator. An optically nonlinear crystal is located in the resonator and arranged to convert a fraction of fundamental-wavelength radiation into second harmonic radiation. The conversion of this fraction of fundamental-wavelength radiation to second-harmonic radiation minimizes mode-hopping in the output radiation.

This invention pertains to transfer of a solid target material onto a substrate by vaporizing the material by irradiating it with intense light of a resonant vibrational mode of the material and depositing the vaporized material on a substrate in a solid form.

The infrared detecting and displaying two-purpose light emitting film consists of up converting light emitting material in 1-80 wt%, transparent organic medium in 10-95 wt% and additive in 0-60 wt%. It may have one adhesive layer on the surface and one flexible or rigid substrate. Under irradiation of infrared ray, the light emitting film emits bright visible light, so that the present invention may be used in anti-fake, display and infrared detection.

The invention provides a polycrystalline synthesis method and a single-crystal growth method of gallium selenide and relates to polycrystalline synthesis and single-crystal growth methods of mid-infrared and far-infrared non-linear materials, aiming at solving the technical problems of existing GaSe polycrystalline synthesis that the stoichiometric deviation is great and the yield is low, an invalid crystal nucleus is prone to form in a spontaneous nucleation phase and a single-crystal growth direction is uncertain. Polycrystalline synthesis comprises the following steps: putting monomer Ga into a small boat and putting the small boat at one end of a quartz tube; putting Se at the other end of the quartz tube; after vacuumizing, carrying out heat sealing; putting the quartz tube into a horizontal double-temperature-region pipe type resistance furnace and synthesizing to obtain a GaSe poly-crystal, wherein the stoichiometric ratio is 1 to (1 to 1.05) and the yield is more than 97 percent. Single-crystal growth comprises the following steps: adding the GaSe poly-crystal into a PBN (Pyrolytic Boron Nitride) crucible; then vertically putting the PBN crucible into the quartz tube; after vacuumizing, carrying out heat sealing; putting the quartz tube into a vertical double-temperature-region pipe type resistance furnace; after the single-crystal growth is finished, obtaining a GaSe single-crystal. The gallium selenide can be used as the mid-infrared and far-infrared laser materials for realizing output of 8Mum to 10Mum laser.

The invention discloses a preparation method of photothermal self-lubricating oil gel for liquid drop remote accurate driving, and belongs to the field of interfacial physical chemistry. Nano-particles are mixed with polydimethylsiloxane and curing agents and heated and cured to obtain nano-particle and polydimethylsiloxane composite materials, and the composite materials are soaked in lubricating liquid and swell to obtain the photothermal self-lubricating oil gel. Both contact angle hysteresis and the slide angle of the surface of the prepared photothermal self-lubricating oil gel for liquid drops with different surface tension are smaller than 5 degrees, rapid response to near infrared laser can be realized, large local temperature gradient fields are formed in surfaces of the materials, and further driving of the liquid drops on the surfaces of the materials can be remotely and accurately controlled. By adjusting the irradiation point position and the direction of the near infrared laser, the liquid drops can move along set complicated tracks or climb up on inclined surfaces by overcoming gravity.

The invention discloses a medium wave infrared laser power stabilization system which mainly solves the problem that an existing system is not strong in stability and low in precision. The whole system comprises a medium wave infrared laser light source system (1), an infrared environment control chamber (2), an acoustic optical modulator (3), a spatial filter (4), a medium wave infrared thin film beam splitter (5), an optical chopper (6), a photoelectricity front-placing module (7), a feedback control module (8), an acoustic optical modulator driver (9) and a laser power detector (10). The medium wave infrared laser light source system outputs medium wave infrared lasers with power to be stabilized, and the infrared lasers pass through the acoustic optical modulator, the spacial filter, the medium wave infrared thin film beam splitter and the optical chopper and then irradiate a photoelectric detector to generate electric signals. The feedback control module processes the electric signals to obtain feedback information, and the acoustic optical modulator driver is controlled to adjust the acoustic optical modulator so as to stabilize the medium infrared laser power. The medium wave stimulate infrared laser power stabilization system has the advantages of being good in stability and high in precision and is suitable for stabilizing the medium wave infrared laser power with the wave band of 2.5 microns to 5 microns.

The invention provides a currency detector using a laser light source, which comprises a currency receiving plate, a cleaner starting tie-in, a starting sensor, a currency feeding plate, a power supply switch, one or more infrared laser, one or more visible light photosensitive element, a signal processing circuit and an executing device. The laser beam having a wavelength between 780 and 1500nm and emitted by the infrared laser is irradiated on the infrared up-conversion material false proof mark of the currency, the generated visible light is received by the photosensitive element, the light is amplified by a pre-amplifier and then the signal is operated and processed so as to identify the currency. The detector of the invention has high accuracy, simple circuit and structure, low cost and high detecting speed.

The invention provides an optical fiber gas cascaded Raman laser capable of realizing 3-5-micron band tuning. The laser comprises a 1-micron band tunable Raman pump source, a first level gas Raman laser generation device and a second level gas Raman laser generation device, the first level gas Raman laser generation device converts 1-micron pump laser generated by the 1-micron band tunable Raman pump source into first level Raman scattering laser, and the first level Raman scattering laser is laser of 1.5-micron band or 2-micron band; and the second level gas Raman laser generation device converts the first level Raman scattering laser into second level Raman scattering laser, and the second level Raman scattering laser is 3-5-micron band tunable mid-infrared laser. According to the optical fiber gas cascaded Raman laser provided by the invention, the output of 3-5-micron band tunable mid-infrared laser is realized in an anti-resonant hollow fiber with a negative curvature by employing a gas Raman cascading manner for the first time.

The invention discloses a measuring method of wavelength variation of a tunable laser. The measuring method comprises the steps of: (1) according to the technical principle of cavity ring down spectroscopy, after an output beam of a to-be-measured laser enters into a stable optical resonant cavity, filling gas which has at least two absorption lines in a wavelength tuning range of the to-be-measured laser into the optical resonant cavity, and tuning output wavelength of the laser through a wavelength controller to make the output beam sweeping over the two integrate gas absorption lines; recording cavity ring down signals in different output of the wavelength controller, and accordingly obtaining a curve of ring down time under different output of the wavelength controller; and comparing the curve with an absorption line of the gas filled into the optical resonant cavity, so as to obtain the relationship between the wavelength controller variation and the output wavelength variation. In the invention, a new method for measuring wavelength variation of a tunable laser is provided. The method in the invention can be applied to various tunable lasers (from ultraviolet lasers to middle far infrared lasers) for measurement. The method has advantages of simple procedure, strong systematic portability and so on.

A high-power long-wave infrared 8 micron-12 micron laser device based on a polarization beam combination technology relates to the laser application technology field. A problem that output power of a 8 micron-12 micron laser acquired through an existing optical parametric oscillator (OPO) or optical parametric amplification (OPA) mode is limited by a crystal film damage threshold so that a single resonant cavity is difficult to acquire high output power is solved. Beam splitting is performed on a 2.1 micron pulse laser and then two ZnGeP2 optical parametric oscillators are pumped respectively so as to generate two beams of orthogonal polarization-state far-infrared lasers of 8 micron-12 micron so that pump light intensity borne by an upper end surface of a single ZnGeP2 crystal is greatly reduced. An optical parametric amplification technology is used to further amplify the 8 micron-12 micron laser and finally two beams of 8 micron-12 micron lasers which do not need polarization are combined into one beam of the 8 micron-12 micron laser with high power. The laser device of the invention is suitable for an occasion of laser acquisition.

Disclosed is an absorption mash gas detecting method for of portable infrared semi-conductor laser, which comprises: employing infrared laser of 1.33ª

A three-dimensional imaging of skin angiopathy and intelligent treatment system, belonging to technology field of medical equipment, comprising: optical fiber used to inject laser into skin tissue, optical fiber used to convey laser reflected or refracted by skin to optical flame detector, near infrared ray optical flame detector / charge-coupled device, Doppler / coherent signal processing system, computer real-time detection and control system working station, laser parameter controller and laser device. The laser device is infrared laser of 805 nm. The invention employs the selective absorption of infrared laser by indocyanine green, which biological tissue adsorbs little and realizes the selective damage to blood vessel. The wavelength of laser of 805-810 nm is much longer than that of currently use, which is 595 nm, so the penetration is deeper which treats deeper blood vessel better, choosing optimum laser parameter automatically by intelligent blood vessel skin damage treating probe, which avoids artificial error, improves treatment effect, reduce purpura and times of repeat treatment.

The invention provides a single crystal LiGa3Te5 which is in a non-centrosymmetric structure, belonging to a trigonal system; the space group is R32, and the cell parameters are as follows: alpha=beta=90 degrees, gamma=120 degrees, and Z=12; and the unit cell volume is expressed as follows: the diameter is 3-15mm, and the length is 20-40mm. The preparation method of the single crystal LiGa3Te5 comprises the steps of firstly preparing polycrystalline LiGa3Te5 and then growing the single crystal LiGa3Te5 by Bridgman method. The prepared single crystal LiGa3Te5 can be used for the physical performance test and the device research of crystals and is large enough; meanwhile, the single crystal LiGa3Te5 has a wide infrared transmission range and can realize mid and far infrared laser outputs by a nonlinear frequency transform technique so that the single crystal LiGa3Te5 can be applied to the manufacturing of nonlinear infrared optical devices as well as piezoelectric devices.

Disclosed is a near infrared laser-driven mitochondrial targeting fluorescent polymer and a preparation method and application thereof. A nano-scale photosensitizer, which is prepared from a polymer of poly-(2Z, 2'Z)-3,3'-(2, 5-bis(diphenylamino)-1, 4-phenyl) bis(2-(3, 5-bis(trifluoromethyl) phenyl) acrylonitrile-copolymer (N-(2-hydroxypropyl) methacrylamide)-copolymer (2-dimethylamino ethyl methacrylate) and an inorganic upconversion nano-scale particle of ytterbium and thulium codoped sodium yttrium fluoride in aqueous solution; when irradiated by laser of a wavelength of 980 nm, the nano-scale photosensitizer can produce reactive oxygen to effectively kill cells. The invention provides a novel and effective nano-scale photosensitive material for research and application of photodynamic therapy of tumor cells in the future.

The invention relates to an ultrahigh-pressure water fog test system comprising a water fog box, a data acquisition and analysis control subsystem, a visible radiation detection unit, an infrared spectrum attenuation detection unit, an infrared thermal imaging detection unit, a 1.06-micrometer near-infrared laser attenuation detection unit, a 10.6-micrometer far-infrared laser attenuation detection unit, an air heating device, an air cooling device, a humidifying device, a dehumidifying device, an axial flow fan, an ultrahigh-pressure ultrahigh-rotate speed spinning nozzle, a temperature sensor, a pressure sensor, a humidity sensor, a wind speed sensor, a water fog concentration sensor and a particle size distributor. The system can simulate the atmospheric environment indexes, such as, atmospheric pressure, temperature, humidity, wind power, and the like in the water fog test box according to test requirements, carry out a shielding disturbance performance index test in the detection ways of visible light, laser, thermal imaging, infrared radiation and the like by aiming at ultrahigh-pressure water fog generated by an ultrahigh-pressure water-jet water fog cloaking generator and carry out analysis and evaluation.