CN2425628Y - Low-power portable laser instrument - Google Patents

Abstract

Recently, the occurrences of laser medicine and optical fiber capable of entering a cavity body provide conditions for studying laser contraceptive technology. The clinical application of non operation male laser contraceptive technology capable of being recovered waits for a successful zoology experiment. The device provides the technology assurance for laser coagulation, obstruction and recovery of an animal spermatic duct and further experiment study. The device is composed of a Nd: YAG laser device and an optical fiber coupled system, which is basically characterized in that through a time controller and through presetting the conducting time of a pulse and pulse width modulator compared and adjusted with really measured laser power, a chopper circuit is caused to have stable voltage, to ensure the stability of the emitted laser power. The device has compact structure, small volume, light weight, convenient carrying, simple operation and safety.

Description

Low-power portable laser device

This utility model relates to a kind of laser aid, a kind of low-power portable laser device that is used for animal experiment study of definitely saying so.

Population increase has become serious social concern, accomplish reasonably to bring the growth of population under control, and is necessary for reproductive population suitable, various, alternative contraceptive device is provided.Though the extensive use of deferent duct birth control art, owing to need open surgery to carry out, and have certain postoperative complication and be difficult for repairing again practical problems such as logical, so the male contraception rate is not high.China's population at reproduction age has reached 6.9 hundred million, and studying new contraceptive device is the demand of society.In recent years along with the laser medicine and the appearance that can enter the cavity inner fiber, for the research and development of laser birth control art provides condition.The laser birth control is compared except having easy and simple to handle with traditional sterillization (vasoligation and tubal ligation), there is not operative incision, but male's percutaneous puncture deferent duct laser sterillization, the women can be through the sterillization of hysteroscope fallopian tube laser, can significantly reduce outside the advantages such as various postoperative complications, can repair again logically after also must birth control, be easy to reproductive population and accept.Can this method of birth control be applied to clinically, be prerequisite with animal experiment study in reliable early stage.

The purpose of this utility model is: for the animal deferent duct coagulates stifled and the reparation research of logical art again, provide a kind of compact conformation, volume is little in light weight, is easy to carry, and is easy and simple to handle, safe and reliable low-power portable laser aid.

The purpose of this utility model realizes by implementing following technical scheme:

A kind of low-power portable laser aid, by the portable casing, be contained in the casing inner bottom part cooling water tank, be loaded on laser instrument and fiber coupling system in the device tank tower above the water tank of housing middle level, be loaded on the indication console switch that installs on power supply in the electric appliance box above the Laser Devices tank tower of housing upper strata and the machine shell panel, display window etc. and partly constitute; Be contained in and include laser instrument and fiber coupling system in the Laser Devices tank tower, all components guides optical generator by the krypton arc lamp in optical fiber, fiber coupler, lens, laser sensor, half reflection plane mirror, laser pump cavity, the laser pump cavity and laser bar, the fully-reflected plane mirror at the outer rear portion of laser pump cavity, quasiconductor in the case, arranges in regular turn to be fixed on the mounting; Laser Devices case end near optical fiber end has the optical fiber fairlead; Bottom water tank end face has into water and outlet, connects the laser pump cavity cooling system by pipeline; Power supply in the electric appliance box includes makes that krypton arc lamp is lighted, the control circuit of preionization and the circuits for triggering of arc discharge, auxiliary high-tension circuit, chopping switch buck main circuit and control krypton arc lamp discharge stability.Laser bar is lasing core, adopts neodymium-doped yttrium-aluminum garnet (Nd:YAG) the crystal garden post rod that has practical value most at present.The effect of krypton arc lamp pumping source is to convert electric energy to radiant energy effectively, has the radiation spectrum that is complementary with Nd:YAG working-laser material absorption band and distributes, for population inversion among the Nd:YAG provides luminous energy.Nd:YAG laser bar and krypton arc lamp pumping source are installed in the laser pump cavity, its effect is can the radiating luminous energy of krypton arc lamp is effective, assemble equably to laser bar, to obtain high pumping efficiency, because it is determining the Density Distribution of pump light on the laser bar, influence the uniformity of output beam, diversity and optical distortion, therefore this device adopts the profile pump system design, make the krypton arc lamp pump light and the emitted laser bundle of irradiating laser rod perpendicular, the laser pump cavity that adopts is the ellipse Cylinder that a kind of inner surface has high reflectance, laser bar and krypton arc lamp are installed in respectively on two focal lines of ellipse garden post, and the transmission that makes energy in the type laser pump cavity of ellipse garden is on the Nd:YAG rod absorber on from the pumping krypton arc lamp light sources transmit on the focal line to another focal line.Because the energy of input pumping krypton arc lamp has only very fraction to export as laser, remaining most energy all is converted into heat and radiation, therefore, too high for preventing laser pump cavity and inner krypton arc lamp and laser bar temperature rise thereof, cooling system must be installed, adopt the water cooling of laser pump cavity outer surface to separate water-cooled mode with krypton arc lamp in this device, the normal operation of assurance device laser output with the endovenous laser rod.Optical resonator is the important component part of this device.It is to be made of half reflection plane mirror and fully-reflected plane mirror staggered relatively in the laser instrument, effect is the interior optical field distribution of control chamber, formation amplification and vibration effectively, because dissimilar cavity structure has a direct impact laser output characteristic such as power, pattern, beam divergence angle, this device is selected the plane-parallel resonator type with good stability for use, completely reflecting mirror and half-reflecting mirror surface are coated with deielectric-coating, stimulated radiation forms at intracavity by feedback and amplifies and vibration, and is exported by half-reflecting mirror.Fiber coupling system is by placing lens, the fiber coupler before the half-reflecting mirror and drawing optical fiber and form, effect be stimulated radiation by half anti-mirror output through lens focus to the fiber coupler input port, assemble through coupling again and introduce in the optical fiber, reach the purpose of efficient output.The effect of Laser Power Devices is to trigger and light the tele-release of krypton arc lamp generation arc light, shine and excite the Nd:YAG rod to produce Laser emission, because the ignition procedures of krypton arc lamp is to add the triggering high pressure earlier, make and form spark discharge in the lamp, the auxiliary high pressure higher slightly than normal working voltage added at the lamp two ends, help the spark silk to develop the electric arc that becomes to be full of fluorescent tube rapidly, add that then running voltage makes the krypton arc lamp successively-ignited, therefore, its power supply includes circuits for triggering, auxiliary high-tension circuit, main circuit and control circuit.Main circuit is a circuit of directly supplying with the lonely lamp discharge of krypton, for low-voltage and high-current is powered continuously, requires the current constant of input lamp, guarantees that laser output power is stable.This device adopts chopped mode step-down switching circuit, and line voltage produces Udc volt DC voltage through rectifying and wave-filtering and gives the copped wave loop power supply.Chopper circuit mainly is made up of switch element Q, control Q opens and turn-offs the square-wave pulse that just DC voltage Udc is transformed into 20-100KHz, by changing the dutycycle t/T of this square-wave pulse, just can obtain different average voltages, behind chopper circuit, be connected to the smoothing filter that LC forms, can on outfan, obtain the direct current output that equates with the square wave average voltage.It is little that this power supply has overall volume, advantage such as circuit efficiency height, ripple are little.Auxiliary high-tension circuit claims the preionization circuit again, is for the real work voltage with continuous krypton arc lamp is complementary, and improves power-supply system efficient and is provided with.The electric power main circuit output voltage is lower usually, after the triggering high pressure makes krypton arc lamp trigger the ionization build-up of luminance, can't make lamp change big electric current arc discharge state over to, must be through auxiliary high pressure, help through the conversion of discharge condition, make lamp enter the arc discharge state, the main circuit discharge is carried out thereupon.Circuits for triggering make the interior gas of fluorescent tube begin ionization and form narrow petard silk discharge channel with so that krypton arc lamp is lighted a fire.The operation principle of control circuit is: provide the driving source of a fixed frequency by the pulse pulse width modulation device, change dutycycle t/T and control the different average voltage of chopper circuit output by regulating its ON time.The ON time of regulating impulse pulse width modulator, can be undertaken by dual mode: the first is set working time, the i.e. running time of control impuls pulse width modulator; It two is the laser signals that receive by the laser sensor that is contained in before the laser optical resonator cavity, after the laser power of amplifying output and set compares in comparator, the signal that output is greater than or less than comes the ON time of automatic regulating impulse pulse width modulator, make krypton arc lamp obtain a constant operating current, export stable laser power.Time controller is to realize that the operation of control impuls pulse width modulator, realization krypton arc lamp obtain the critical component of constant operating current, Nd:YAG laser bar output stabilized lasers power, it is by 4 enumerators, 2 decoders and relevant nixie display, 1 time pulse generator, the nor gate phase inverter, peaker and touch-switch are formed, and its structure is: 2 cd ₄₅₁₀The decimal counter parallel connection is again with two groups of (S in parallel ₁, S ₃) and (S ₂, S ₄) touch gang switch and be composed in series an intervalometer; 2 d ₄₅₁₀Decimal counter composes in parallel a timer; Cd again connects behind the intervalometer series connection timer ₄₅₁₁Decoder and corresponding nixie display and form the monitor that shows real-time time; (the S that has two parallel connections of time pulse generator cd4060 series connection of RC oscillation circuit ₁, S ₃) and (S ₂, S ₄) touch-switch, its RST resetting pin connection timer U/D foot ground connection; At the outfan of timer, two CO feet connect nor gate cd ₄₀₀₁, latter's outfan serial connection phase inverter cd ₄₀₆₉At the RST of monitor foot device peaker, promptly constitute the time controller of this device.The time controller operation principle is: initialize switch (S ₁, S ₃) closure, the intervalometer preset count, timer is followed timing, and display shows the time number; Initialize switch (S ₂, S ₄) closure, intervalometer reduces preset count, and timer and display all reduce demonstration time number.Basic feature of the present invention is: have by time controller (Fig. 5) control impuls pulse width modulator TL ₄₉₄The circuit of ON time (Fig. 6), and the laser signal that receives by the laser sensor of device before optical resonator, compare in comparator through power amplification output and the laser power of setting, the automatic regulating impulse pulse width modulator of the signal ON time (Fig. 6) that output is greater than or less than makes chopper circuit (Fig. 4) that the control circuit of burning voltage output be arranged.

Advantage of the present utility model is, the equipments overall structure compactness, volume is little, in light weight, be easy to carry, laser beam is coupled to optical fiber by fiber coupler, does animal (rabbit etc.) endovenous laser deferent duct and coagulates stifled or reparation, and medical these devices of technical parameter such as power demand and irradiation time can satisfy fully.

This utility model has following accompanying drawing:

Fig. 1 is this utility model laser device structural representation

Fig. 2 is this utility model Laser Power Devices and control composition frame chart

Fig. 3 is this utility model control circuit theory diagram

Fig. 4 is electric power main circuit, auxiliary high pressure and circuits for triggering schematic diagram

Fig. 5 is the time controller circuit theory diagrams

Fig. 6 is the automatic regulating impulse pulse width modulator ON time circuit theory diagrams of actual measurement and setting laser power ratio

Fig. 7 is this utility model perspective view

Fig. 8 is this utility model chassis panel structure figure

Labelling among the figure: 1 is optical fiber, and 2 is fiber coupler, and 3 is lens, 4 is laser sensor, and 5 are the half reflection plane mirror, and 6 is laser pump cavity, 7 is krypton arc lamp, and 8 is the Nd:YAG laser bar, and 9 is fully-reflected plane mirror, 10 for quasiconductor guides light, and 11 is water tank, and 12 is water inlet, 13 is outlet, 14 is the Laser Devices tank tower, and 15 is electric appliance box, and 16 is the optical fiber fairlead.

Further specify as follows below in conjunction with accompanying drawing embodiment to this utility model structure:

Working-laser material 8 adopts Nd:YAG crystal garden post rod, excellent diameter phi 6mm, length 100mm; Krypton arc lamp 7: long 230mm, pole span 90mm, lamp external diameter φ 7mm, lamp internal diameter φ 6mm, 3.5Pa, operating current 20A, 220 volts of running voltages, input power 4KW, radiation efficiency 2.5%, 6 liters/minute of cooling water flows are pressed in inflation; Ellipse garden post laser pump cavity 6: ellipse garden major cross-sectional axis 2a=19mm, minor axis 2b=14mm, lamp and interrod spacing (focus spacing) 2c=16mm, eccentric ratio e=c/a=0.84, laser pump cavity 6 usefulness copper materials are made, long 300mm, inner surface polishing back is gold-plated, guarantees to have the minute surface of high reflectance; Adopt water-cooled, the equal suit cold water pipe of laser pump cavity outer surface, laser bar and krypton arc lamp forms air ring with the water tank that is contained in bottom of shell and follows; Lens are to half-reflecting mirror spacing 10mm, lens to fiber coupler apart from 30mm, the long 25mm of fiber coupler; Fully-reflected plane mirror is close to laser pump cavity; In the power-supply system: time controller (Fig. 5) is by 4 cd ₄₅₁₀Decimal counter, 2 cd ₄₅₁₁Decoder and corresponding nixie display thereof, 1 time pulse generator, nor gate phase inverter, peaker and touch-switch are formed, and its structure is: 2 cd ₄₅₁₀The enumerator parallel connection is touched gang switch and is composed in series an intervalometer with two groups in parallel again; Other is 2 cd ₄₅₁₀Enumerator composes in parallel a timer; Cd again connects behind the intervalometer series connection timer ₄₅₁₁Decoder and corresponding nixie display are formed the monitor that shows real-time time; The time pulse generator cd that has the RC oscillation circuit ₄₀₆₀Two parallel connections of series connection touch gang switch, its RST resetting pin connection timer U/D foot ground connection; At the outfan of timer, two CO feet connect nor gate cd ₄₀₀₁, latter's outfan serial connection phase inverter cd ₄₀₆₉At the RST of monitor foot device peaker.The control circuit that compares the control impuls pulse width modulator with the actual measurement laser power is set, by time controller and connected comparator cd ₄₅₈₅, laser sensor Wg is connected in series LM ₃₂₄Its output of secondary power amplifying circuit is through display module input comparator cd ₄₅₈₅, latter's outfan connects digital potentiometer module and connects TL again ₄₉₄Pulse pulse-width modulator and constituting.(S among Fig. 5 ₁, S ₃) (S ₂, S ₄) be that gang switch, cross symbol switch closure increase the working time, a character list switch closure reduces the working time, and C is the time pulse outfan.The pulse pulse width modulation device is TL among Fig. 6 ₄₉₄, comparator is Cd ₄₅₈₅, the time pulse generator is cd ₄₀₆₀, intervalometer is cd ₄₅₁₀, decoder is cd ₄₅₁₁, Wg is a laser sensor, RW ₂Digital telecommunication device module, RW ₁With RW ₃Be potentiometer.

Claims (3)

1, a kind of low-power portable laser aid, by the portable casing, be loaded on the casing inner bottom part cooling water tank, be loaded on laser instrument and the fiber coupling system in the Laser Devices tank tower above the water tank of housing middle level, be loaded on the indication console switch that installs on power supply in the face electric appliance box of housing upper strata Laser Devices tank tower and the machine shell panel, display windows etc. partly constitute; Include laser instrument and fiber coupling system in the Laser Devices tank tower, all components is by the fully-reflected plane mirror at the krypton arc lamp in optical fiber, fiber coupler, lens, half reflection plane mirror, laser pump cavity, the laser pump cavity and laser bar, the outer rear portion of laser pump cavity in the case, and quasiconductor guides light, arranges and be fixed on the mounting in regular turn; Laser Devices case end near optical fiber end has the optical fiber fairlead, and bottom water tank end face has into water and outlet, connects the laser pump cavity cooling system by pipeline; Power supply in the electric appliance box includes krypton arc lamp is lighted, the circuits for triggering of preionization and arc discharge, auxiliary high-tension circuit, the control circuit of chopping switch buck main circuit and the lonely lamp discharge stability of control krypton, it is characterized in that: control krypton arc lamp stable discharging obtains the control circuit of stabilized lasers power output, for having circuit by time controller control impuls pulse width modulator ON time, and the laser signal that receives by the laser sensor of device before the laser optical resonator cavity that constitutes by fully-reflected plane mirror and half reflection plane mirror, through power amplification circuit amplify output and the laser power of in intervalometer, setting in comparator relatively, being greater than or less than signal automatic regulating impulse pulse width modulator ON time of output and make chopper circuit that the control circuit of burning voltage output be arranged.

2, according to the described low-power portable of claim 1 laser aid, it is characterized in that: time controller is by 4 cd ₄₅₁₀Decimal counter, 2 cd ₄₅₁₁Decoder and corresponding nixie display thereof, 1 time pulse generator, nor gate phase inverter, peaker and touch-switch are formed, and its structure is: 2 cd ₄₅₁₀The enumerator parallel connection is touched gang switch and is composed in series an intervalometer with two groups in parallel again; Other is 2 cd ₄₅₁₀Enumerator composes in parallel a timer; Cd again connects behind the intervalometer series connection timer ₄₅₁₁Decoder and corresponding nixie display are formed the monitor that shows real-time time; The time pulse generator cd that has the RC oscillation circuit ₄₀₆₀Two parallel connections of series connection touch gang switch, its RST resetting pin connection timer U/D foot ground connection; At the outfan of timer, two CO feet connect nor gate cd ₄₀₀₁, latter's outfan serial connection phase inverter cd ₄₀₆₉At the RST of monitor foot device peaker.

3, according to the described low-power portable of claim 2 laser aid, it is characterized in that: the control circuit that compares the control impuls pulse width modulator with the actual measurement laser power is set, by time controller and connected comparator cd ₄₅₈₅, laser sensor Wg is connected in series LM ₃₂₄Its output of secondary power amplifying circuit is through display module input comparator cd ₄₅₈₅, latter's outfan connects digital potentiometer module and connects TL again ₄₉₄Pulse pulse-width modulator and constituting.

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