743 results about "Laser tube" patented technology

The invention relates to a watch-type non-trauma optical acoustic blood sugar monitor. A display screen, a control button, a controller, a cell and a measurement box are arranged in watch-type casing, an acoustic insulating layer, a sound absorption pad, a semiconductor laser tube, a Fourier lens, a light-transparent protection film and a hollow multi-ring array sensor are packaged in the measurement box to form a integrated coaxial confocal structure. The watch-type casing is equipped with a watchband to be wore on wrist of detector, an optical acoustic excitation source and an optical path lens system generate focused laser beam which passes through the hollow multi-ring array sensor and radiates to blood vessel of wrist to realize optical acoustic blood sugar detection of continuous A-type dynamic focusing scan and provide optical acoustic blood sugar results of multiple sites along wrist depth direction. The monitor has advantages of having small structure and simple operation, realizing real-time monitoring of optical acoustic blood sugar, having no trauma when detecting, having no need of blood supply and test paper, and avoiding cross infection and environmental influence.

The invention discloses a control device and method for implementing optical module wavelength lock, wherein the apparatus includes: a laser tube core temperature control unit, for obtaining a feedback signal of laser build-in negative temperature coefficient thermistor, and comparing the feedback signal with a presetting signal to generate a control signal inputted to a laser build-in thermoelectric cooler; a wavelength autocontrol unit, for detecting laser output optical signal, and obtaining a wavelength deviation signal for implementing wavelength lock; a superpose unit, for superposing the wavelength deviation signal onto the presetting signal and sending to the laser tube core temperature control unit. The invention overcomes the defect of large offset of optical module output wavelength, and resolves the problem of neighboring channel signal crosstalk of the DWDM system.

RF excited gas laser consists of a laser tube having external surfaces; a power supply compartment having elongated external fins and a pair of endplates on its opposite ends and wherein laser tube is placed between and is flexibly attached to the endplates; a sheet-metal cover mounted to the endplates and to power supply compartment and forming a laser assembly and having at least one pair of intake openings and at least one pair of exhaust openings for the cooling air to flow through the laser assembly by entering the laser assembly through the intake openings and flowing over power supply external fins and over laser tube external surfaces and then exiting through the exhaust openings. Present invention is characterized by lower cost and more efficient forced air cooling laser tube and RF power supply.

The invention relates to a technique field of frequency stabilization of laser light source. It consists of laser source, acetylene gas absorption chamber, and servo-feedback controller. The laser source as a semiconductor laser with optical fiber grating outer cavity is composed of semiconductor laser tube core in quanta trap F-P type and an optical fiber grating. A reflection reducing coating is coated on the coupling end surface of the tube core and optical fiber grating. The other end of the optical fiber grating is linked to a collimator. There are two pieces of piezoelectric ceramics end to end on the two ends of the optical fiber grating. The two input ends of phase locking amplifier in the servo-feedback controller are connected to the output end of light sensor and sine signal source respectively. The one end of the signal source and the high voltage drive are connected to a phase locking amplifier; with the other end connected to said two pieces of piezoelectric ceramics. There is an isolator and a partial reflector located on the optical path between the collimator and the acetylene gas absorption chamber. The invention possesses the advantages of higher stability in frequency, very narrow laser line-width as well as simple structure and higher stability in mechanics.

The invention provides an optical acoustic ultrasound excitation and induction integrated detection device. An acoustic insulating layer, a sound absorption pad, a miniaturized semiconductor laser tube, a Fourier lens, a cylinder lens, a protection film and an annular multi-ring array sensor are all arranged in casing of the detection device and at same axle wire to form an integrated coaxial confocal structure. The multi-ring array sensor can generate ultrasonic signal, receive ultrasonic echo signal and receive optical acoustic signal by time-sharing excitation to realize optical acoustic ultrasound single or combined detection of A-type dynamic scan. The detection device has advantages of integrating excitation and induction of optical acoustic ultrasound, greatly increasing excitation and induction efficiency optical acoustic ultrasound, effectively reducing laser energy demand, increasing detection depth, and having high measurement sensitivity, simple operation and low cost. The detection device can be widely applied in fields of blood oxygen detection, blood sugar detection, HIFU therapy and effect monitoring, industrial crack detection and so on.

The related sealing-type CO2 laser tube comprises: a metal-plated full reflection mirror 1, a muffler 2 set in tube 4 to connect sheath 3 and tube 5, a gas storage sheath 3, a water cooling tube 4 set on top of a discharge tube 5 together in sheath 3, an output mirror 6 together with mirror 1 bonded on ends of laser tube ends by epoxy resin, the TiO2 photo catalyst 8 coated on inner wall of tube 5 and electrodes 7/9, and two electrodes 7/9 coaxial arranged on ends of tube 5. This invention is simple and convenient, prolongs product life time, reduces cost, and has well social and economic benefits.

The invention is concerned with stabilized frequency method and equipment of double longitudinal modes laser based on thermoelectric cooler. The stabilized frequency method is piezoelectric ceramics, and so on. Detect the circumstance temperature T0 of laser to confirm heat balance temperature Tset, start electrical source of laser to test current temperature Treal of laser tube at real time. Adjust countercurrent I according to different value between current temperature Treal and heat balance temperature Tset and heat up laser tube to keep temperature arrive to Tset. Detect optical power Pm and Pm+1of m order and m+1order on the mutual vertical polarization direction to laser and count the different valueDeltP of the two powers. When the temperature of laser tube is near to heat balance temperature Tset, afford forward or counter current to thermoelectric cooler according to the forward or counter to the different valueDeltP, keep the symmetry of two longitudinal mode laser frequency and make the different valueDeltP close to zero, by controlling the temperature of laser tube, the length of resonant cavity and laser longitudinal mode frequency. The two longitudinal mode frequencies are steady, and this product is fit for stabilized frequency.

The invention relates to a small CPT atomic clock physical system, and belongs to the technical field of atomic frequency standard. The physical system comprises a laser portion and an atom air chamber portion. The laser portion comprises a VCSEL laser tube, an aperture diaphragm, and a [lambda]/4 wave plate. The atom air chamber portion comprises an atom air chamber, a C field coil, a thermistor, a low electromagnetic film electric heating sheet, and a photoelectric detector. The C field coil uses a reverse Helmholtz coil structure to realize. Heating methods of the low electromagnetic film electric heating sheet and high-frequency AC electric heating are used to heat the atom air chamber. The system uses a vacuum heat insulation technology to package. The output frequency of the physical system is high in stability, stable in performance, small in volume, low in power consumption, and low in cost, and is especially suitable to be used for a glass type atom air chamber whose sealing port is on the central position of a cylindrical surface.

The invention provides a laser light-infrared light combined acupuncture instrument which comprises a control host and an output therapeutic lamp holder, wherein the control host comprises a power circuit, a pulse generating and regulating circuit, a laser control and drive circuit and an infrared control and feedback circuit; the pulse generating and regulating circuit generates a signal to directly control the output of an infrared tube and generates a signal to control the output of a laser device through the laser control and drive circuit; the infrared control and feedback circuit feeds back according to skin temperature rise caused by infrared illumination so as to control infrared output; the interior of the output therapeutic lamp holder is sequentially provided with a laser tube assembly, a thermal-protective coating with holes and an infrared tube assembly from the benmost side to an output port; and the output end of the lamp holder is provided with an IR-transmission glass cover on which a temperature sensor is arranged. The laser-infrared combined acupuncture instrument has the functions of laser acupunctural needle and infrared thermal moxibustion which not only can be applied simultaneously but also can be applied independently, and is suitable for carrying out irradiation treatment on various acupuncture points or diseased parts.

The invention discloses an all-in-one machine with numerical control ink-jet drawing and laser cutting. The machine comprises a bracket, a rectangular working platform supported on the bracket, a power distribution box, a control circuit board and a main control board connected with the control circuit board, wherein the left edge and the right edge of the working platform are respectively provided with a longitudinal guide rail; a cross beam capable of moving on the longitudinal guide rail in a reciprocating manner is erected between the longitudinal guide rails; the cross beam is provided with a transverse trolley track which is provided with a trolley; the trolley is provided with an ink-jet device and a condensing lens of a laser cutting device; and the ink-jet device and the laser cutting device are respectively and electrically connected with the control circuit board. The all-in-one machine has the advantages that an ink-jet mode and a laser cutting mode are simultaneously applied in a cutting machine; since cut materials can not be contacted in both the ink-jet mode and the laser cutting mode, all the materials needing to be cut can be cut accurately, the high temperature and the wastes generated by cutting can be discharged in time, a laser tube can be dissipated in time, and the all-in-one machine provides multiple data output modes.

The invention discloses a method for obtaining a Ramsey-CPT spectrum. The method includes the steps that a current periodically switched between I<1> and I<2> is coupled with microwaves to be input into a laser tube, wherein when the laser tube works with the current I<1>, the power of a positive first-stage sideband and the power of a negative first-stage sideband in polychromatic light output by the laser tube are maximum, and the frequency meets the requirement for CPT resonance with alkali metal atoms; after the current is switched, the jumping probability of all frequency components of the polychromatic light output by the laser tube and the alkali metal atoms is almost zero. In this way, the alkali metal atoms are switched between the state of being acted with lasers to generate CPT resonance and the interaction-free free relaxation state, and therefore Ramsey-CPT interference is generated. The invention further discloses a device for obtaining the Ramsey-CPT spectrum. By means of the scheme, a Ramsey-CPT atomic clock which is the same as a fashionable CPT atom clock in size and power consumption and better than the fashionable CPT atom clock in frequency stability can be achieved.

The invention relates to a laser hybrid light source projector and a light source device thereof. The light source device comprises a blue LED light source, a red LED light source, a green LED light source, lens groups at the front ends of the light sources, a blue semiconductor laser tube, a lens group at the front end of the blue semiconductor laser tube, a spectroscope A and a spectroscope B; the surface of the green LED light source is provided with green fluorescent powder; the green LED light source is opposite to the semiconductor laser tube, the spectroscope B is located between the green LED light source and the semiconductor laser tube, the blue LED light source is arranged at one side of the spectroscope B, and the spectroscope A is arranged at the front of the red LED light source. The laser hybrid light source projector does not use the light source system of a laser projector with a color wheel, so that the influence of the color wheel on the picture quality is avoided; the blue semiconductor laser irradiates the fluorescent powder on the green LED, the brightness of the original green LED is obviously improved without increasing the numerical aperture of the light emitting area of the LED, and accordingly the output brightness of the projector is improved.

The invention pertains to the technical field of laser application, the method provided by the invention includes the following procedures that the laser tube arranged in a longitudinal magnetic field is turned on and preheated, 1/4 clockwise and counterclockwise circularly polarized lights emitted from the laser tube preliminarily separated by a wave-plate and a polarized light splitter to achieve two orthogonal linear polarized light beams; a low-excursion high-frequency photoelectric detector is used to convert the linear polarized light beams into electric signals and measure the amplitude values of the DC and AC components, so as to accurately separate and measure the optical powers P L and PR of the two circularly polarized light beams; the current value of the electric-heating apparatus wound around the laser tube is adjusted, and the temperature of the laser tube and the length of the resonant cavity are changed to adjust the optical power difference PL-PR to zero, and both polarized optical frequencies are stabilized; the device provided by the invention comprises an optical-power precise separating and measuring circuit used to gain the optical-power DC component and AC component; the invention is characterized in that the low-excursion high-frequency photoelectric detector can simultaneously measure the optical powers of two laser beams (with different frequencies) mixed in the linear polarized light, as a result, the stability of the frequency of a frequency-stabilized LASER is improved.

The invention discloses a package of a quantum cascade laser with a thermoelectric refrigerator, which comprises a heat radiating device arranged outside a package tube shell, an HHL (High Heat Load) tube shell assembly and a laser tube core assembly, wherein the heat radiating device is used for absorbing all heat conducted from the hot end of the thermoelectric refrigerator via the bottom layer of the tube shell; the HHL tube shell assembly is used for reducing the influence of accumulated internal space heat on a detector tube core, and the internal part comprises the packaged thermoelectric refrigerator, an optical transmission window and a detector tube core assembly; and the laser tube core assembly comprises a laser tube core, an L-shaped transition heat sink and a thermistor and is used for transferring the heat of a detector chip to the cold end of the thermoelectric refrigerator. According to the invention, the double heat sink structure of high-heat-conductivity transition heat sink and heat sink combination is adopted, the heat radiating capability of the laser tube core can be effectively enhanced, and the deterioration of the internal working environment due to the heat radiation problem is reduced; and meanwhile, the working temperature can be controlled by using the thermoelectric refrigerator, and the package has the advantages of controllable temperature and reliability.

The invention relates to an intake-type smoke-sensing fire detection alarming device adopting a laser tube as a luminous element, which is provided with a circular universal base, wherein the circular universal base is fixed on a roof or a ceiling through a screw, and an alarming device is buckled on the base in a threading way; a bottom support, a circuit board, a middle support, a main body, a blower and a filter box are sequentially installed on the base, and finally, an alarming device upper cover is installed; a detecting cavity and the circuit board are arranged inside a space which is formed by the bottom support and the middle support, the circuit board is arranged above the middle support, a copper foil is wrapped on the four walls of the space, and the space is provided with an air outlet; the main body covers the space; two sides of the main body are respectively fixed by a choke plug; a display module is embedded on the main body; the blower is closed and wrapped by the middle support and the main body; the main body is connected with a filter bottom cover, and a filter screen is installed inside a space which is formed by the filter bottom cover and a filter upper cover. The alarming device has low cost and price and a small size and is convenient to install; the protection area is small (64 square meters), the alarming device is suitable for the small important fireproof field; and the large-sized networking and the remote monitoring can be carried out.

The invention discloses a rubidium atomic microwave clock based on Faraday laser pumping. By using a Faraday external cavity laser technique with wavelength operated on a rubidium atomic transition spectral line, frequency of output laser is homogenized through high frequency modulation and applied to a pumping source of a rubidium atomic microwave clock so as to obtain a rubidium atomic microwaveclock based on Faraday laser pumping, wherein wavelength of laser generated by a Faraday laser unit is capable of highly stably operating on the rubidium atomic transition spectral line and is insensitive to operating current and temperature of a laser tube; the rubidium atomic microwave clock uses Faraday laser as pumping light, the operating mode that a traditional laser pumped rubidium atomicmicrowave clock requires a servo locking circuit system to stabilize the frequency during laser pumping is subverted, the international problems in laser loss of lock related to laser frequency stabilization are thoroughly solved, and long-term continuous reliable operation is available within a lifetime of the laser tube.

A double longitudinal-mode thermoelectric cooling frequency-offset-lock method and a device based on the iodine frequency stabilization reference belong to the technical field of laser application; in the invention the center frequency of the iodine frequency stabilization laser with a relative frequency accuracy being 10<-11> is taken as a reference frequency, frequency locking is carried out on the frequency of the laser output by multi-double-longitudinal-mode lasers, therefore one fixed difference is maintained between the multi-lasers and the reference frequency, so that the relative frequency accuracy of the double-longitudinal-mode laser is improved from 10<-7>-10<-8> to 10<-9>, the frequency consistency of multi-double-longitudinal-mode lasers is improved from 10<-7> to 10<-9>, and meanwhile, a symmetrical thermal structure is preheated by a thermoelectric cooler and the cavity length of the frequency stabilization is regulated, thereby the influence of the radial distortion of a laser tube on the output frequency stability is eliminated, the environmental adaptability is enhanced, the preheating time is shortened and the service life of the laser tube is prolonged.

The invention relates to a diving automatic track shooting and video feedback method and a system thereof, comprising acquiring diving moment of a player accurately, according to the set of the player, acquiring delay time of the player reaching the highest point, predicting air position of the player for motion of the player after the highest point according to law of motion of free falling body, performing track shooting, finally broadcasting the act video shoot through a projector with delayed several seconds, so that the player can see the act effect of himself at once. The system comprises a sensor unit composed of a laser tube bundle, a photo-sensitive tube bundle and a signal processor; a master control unit comprising a master controller, a stepping motor and a camera; a display unit composed of a computer, a projector and a translucent screen. The invention is capable of representing air act of the diving player accurately, and enabling the player to see the act video of himself after completing diving, with input directly feed back to the player to enhance training effect.

The invention discloses a pocket-hole sewing machine for clothing pocket mouth processing and relates to the technical field of clothing processing machines. The pocket-hole sewing machine comprises aworkbench and a sewing machine body, wherein a laser tube used for cutting a pocket mouth is arranged above the workbench, a charging port used for containing a pocket welt is arranged on the workbench, a pocket-folding mechanism located above the charging port is arranged on an upper crossbeam, and a fixing mechanism and a shaping mechanism which are connected together are arranged on the uppercrossbeam in a sliding mode. Compared with the prior art, the pocket-hole sewing machine is compact in overall structure; and by use of the fixing mechanism and the shaping mechanism which are arranged on the upper crossbeam in the sliding mode, clothing is clamped by the fixing mechanism and enters the laser tube, the charging port and a sewing machine station sequentially, the laser tube completes cutting on the pocket mouth position of the clothing, the pocket-folding mechanism and the shaping mechanism cooperate to complete alignment of the pocket welt to the pocket mouth as well as edge turn-up and pocket folding, and finally the sewing machine body sews the pocket welt and the pocket mouth. The whole process is automatically completed by the machine, so that production efficiency ishigh, pocket-hole sewing precision is high, the number of workers is reduced, and production cost is lowered.

The invention discloses a signal acquisition device based on experiments of laser-induced ignition of solid propellants. The signal acquisition device comprises image recording equipment, a light-emitting diode, a flame photodiode, a laser photodiode, an amplifying circuit and a data acquisition card, wherein the laser photodiode is close to the wall of a laser tube; the flame photodiode is arranged outside a view window of a combustion chamber and is in positional correspondence with the view window; an input end of the amplifying circuit is connected with the laser photodiode, and an output end of the amplifying circuit is connected with the light-emitting diode; the light-emitting diode is arranged in a photographable visual angle of the image recording equipment, and the image recording equipment is arranged outside the view window of the combustion chamber and is in positional correspondence with the view window; a signal input end of the data acquisition card is connected with the laser photodiode and the flame photodiode. The signal acquisition device is simple in principle, high in precision and reasonable in cost and is convenient to operate.

The invention discloses a grating external cavity semiconductor laser, which mainly comprises a semiconductor laser tube, a grating and a half-wave plate. Light emitted by the semiconductor laser tube is transmitted to the grating through the half-wave plate; zero-level diffraction light of the grating serves as output light of the semiconductor laser and primary diffraction light of the grating serves as feedback light to return along with an original path; and the intensity of the feedback light is adjusted by rotating the half-wave plate to change the polarization direction of the incidentlight. The feedback intensity of the grating external cavity semiconductor laser is controlled so as to realize wider single-mode mode-jump-free range and narrower line width output of an external cavity semiconductor.

The invention discloses a multi-wavelength laser beam combination system, comprising tube cores (1) of a plurality of semiconductor lasers, and a fast axis collimation lens (2), a volume Bragg grating (VBG) (3), a fast-slow axis collimation lens (4), a holographic grating (5) and a beam transforming lens set (6) arranged on an output light path of the semiconductor laser tube cores. The system is characterized in that the fast-slow axis collimation lens (4) is placed on the back of the volume Bragg grating (3), so that laser beams from the semiconductor laser tube cores are diffracted to the same direction on +1-level diffraction fringes to realize semiconductor laser beam combination of the multiple tube cores (1). The beam combination technology improves the wavelength stability of each semiconductor laser tube core, and also improves the working stability of the whole system. The beam combination technology provides a new method and path for realizing a high-brightness and high-power direct semiconductor laser system.