CN2033504U - Medical laser power monitor - Google Patents
Medical laser power monitor Download PDFInfo
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- CN2033504U CN2033504U CN 88207952 CN88207952U CN2033504U CN 2033504 U CN2033504 U CN 2033504U CN 88207952 CN88207952 CN 88207952 CN 88207952 U CN88207952 U CN 88207952U CN 2033504 U CN2033504 U CN 2033504U
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- laser power
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- power monitor
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Abstract
The utility model relates to a laser power monitor which is used for monitoring the medical laser power. The medical laser power monitor comprises a detector, a light beam-separating sheet which can separate the incidence beam into sample-taking light beam and working light beam and a base of the light beam-separating sheet. The laser power monitor is divided into two sorts of opto-electrical type and thermoelectric type according to the different wave lengths of the incidence laser beam. The utility model can detect the laser power value when the laser therapy apparatus simultaneously works and can actually reflect the power value when the laser device works. The laser power monitor of the utility model works stable and has lower cost price.
Description
The utility model relates to the monitor of laser power, the instrument of when relating in particular to laser therapy laser power being monitored.
Monitoring to medical laser power is very generally used in the medical laser treatment instrument.Fig. 1 is the schematic diagram of medical laser power monitoring commonly used.The turning that external form is the laser tube 1 of ∩ type have one can printing opacity window 2, place an infrared eye 3 in that window 2 is other, infrared eye 3 will convert electric signal to through the light of window 2, and then carry out signal Processing, thereby measure laser power.This monitor is effective.But because the laser tube structure difference of using particularly when straight tube structure, just can not be copied this monitor mechanically laser power is monitored.
The existing laser powermeter that straight tube laser tube power is detected is divided into two kinds of photoelectric type laser powermeter and electrothermic type laser powermeters according to used optical maser wavelength difference, and they are respectively applied for the power measurement of He-Ne laser tube and CO laser tube.
Fig. 2 is a photoelectric type laser powermeter schematic diagram in the prior art, referring to Fig. 2.It mainly adopts silicon photocell 4(or silicon photo diode) laser beam 6 of incident is received after diffusing globe 5 diffusions, convert thereof into electric signal.This electric signal becomes voltage signal through current-to-voltage convertor (for example forming by operational amplifier is anti-phase) with photocurrent again, and voltage signal shows its performance number by gauge outfit (pointer-type) or after the A/D conversion by charactron after calibrating.
Fig. 3 is an electrothermic type laser powermeter schematic diagram in the prior art, referring to Fig. 3, wherein laser beam 7 is transformed into heat after being absorbed by the heat absorbing sheet in the power meter 8, the temperature difference of being surveyed on the heat absorbing sheet 8 by the thermoelectric pile 9 that is distributed in the heat absorbing sheet next door produces one and the corresponding electric potential signal of laser signal then.Obtain after amplifying via the input of operational amplifier homophase by the thermoelectrical potential of thermoelectric pile 9 output one with the laser power corresponding voltage signal, after calibration, behind input gauge outfit (pointer-type) or the input A/D change-over circuit, show laser power value by charactron.
Though more than two kinds of laser powermeters can measure laser power, but there is following defective: when (1) uses laser powermeter to measure, to inject whole laser beam in the power meter, thereby can not use laser therapeutic apparantus to treat Laser Measurement power simultaneously.(2) because the optical power stability of the used laser tube of medical laser treatment instrument is relatively poor, laser power has bigger difference when Laser Measurement tube power and use laser therapeutic apparantus.The value that begins to measure so just can not reflect actual value, makes the instrumentation personnel be in blindly mode of operation.
The purpose of this utility model provides a kind of laser power monitor instrument, treats at laser therapeutic apparantus and monitors laser power simultaneously.
Another purpose of the present utility model is to provide a kind of cooling device to electrothermic type laser power monitor instrument, be used to cool off since laser for a long time according to the time the hot prose style free from parallelism temperature that causes raise, thereby improve stability.
A purpose more of the present utility model is to be avoided the interference of the high operating voltage of laser tube by the ultra-weak electronic signal of above-mentioned detector output, improves stability.
The laser power monitor instrument that the utility model provides, comprise the detector that laser is surveyed, signal processing circuit to the above-mentioned electric signal that is recorded by detector is handled is characterized in that: have an incoming laser beam to be divided into the beam-splitting plate of different sampling laser beam in the direction of propagation and work laser beam between above-mentioned detector and above-mentioned laser instrument; The above-mentioned incoming laser beam direction of propagation is identical with the work laser beam direction of propagation.
The laser power monitor instrument that the utility model provides, its beam-splitting plate and the incoming laser beam direction of propagation are angled, the sampling laser beam is different with the work laser beam direction of propagation, can monitor that simultaneously also the available work laser beam is carried out laser therapy to the sampling laser beam power like this.
The laser power monitor instrument that the utility model provides, it has a hot prose style free from parallelism and is used for the cooling device of a heat of cooling prose style free from parallelism, this device is by being made up of the annular water tank of excellent contact with heat absorbing sheet, chilled water is the chilled water of laser instrument in the medical laser treatment instrument, it attracts from laser instrument, and the water in the annular water tank flows into the cyclic water tank that has water pump of medical laser treatment instrument.Above-mentioned cooling device also can be made up of the hot prose style free from parallelism of air.
The laser power monitor instrument that the utility model provides, it has an anti-interference box, and the weak electric signal of being exported by detector is input in the amplifying circuit, near the above-mentioned box this amplifying circuit is placed on.
Be by foregoing invention content advantage of the present utility model as can be known, the laser power monitor device carries out power monitoring when laser therapeutic apparantus is treated, performance number in the time of can actually reflecting laser therapy like this, so that the power of doctor and adjustment laser instrument, until meeting the requirements.
It is constant that the cooling device that another advantage of the present utility model is an above-mentioned hot prose style free from parallelism makes hot prose style free from parallelism temperature reduce the heat absorbing sheet reference temperature, improved the stability of this monitor.
An advantage more of the present utility model is that signal amplifier is placed in the above-mentioned jamproof box, both can signal be delivered in the amplifier by the ultra-weak electronic signal of detector output like this, avoid interference in the time of also can be near amplifier being placed on laser instrument by long lead very.
Below with reference to accompanying drawing preferred embodiment of the present utility model is described, so that to having further understanding in of the present utility model:
Fig. 1 is the schematic diagram of medical laser monitoring commonly used;
Fig. 2 is a photoelectric type laser powermeter schematic diagram;
Fig. 3 is an electrothermic type laser powermeter schematic diagram;
Fig. 4 is the wiring layout that medical laser treatment instrument of the present utility model is housed;
Fig. 5 is the cut-open view of electrothermic type laser power monitor instrument in the utility model;
Fig. 6 a is the synoptic diagram of the thermoelectric pile of electrothermic type laser power monitor instrument in the utility model;
The cut-open view of Fig. 6 b for assembling between thermoelectric pile shown in Fig. 6 a and the heat absorbing sheet;
Fig. 7 is the wiring layout of the water-cooling apparatus of electrothermic type laser power monitor instrument in the utility model;
Fig. 8 is the cut-open view of the air-cooling apparatus of electrothermic type laser power monitor instrument in the utility model;
Fig. 9 a and 9b are the signal processing circuit block diagram and the circuit diagram of electrothermic type laser power monitor instrument in the utility model:
Figure 10 is the cut-open view of photoelectric type laser power monitor instrument in the utility model;
Figure 11 a and 11b are the block diagram and the circuit diagram of the signal processing circuit of photoelectric type laser power monitor instrument in the utility model;
Referring to Fig. 4, Fig. 4 is the wiring layout that medical laser treatment instrument of the present utility model is housed, and wherein 11 is the power supply box and the therapeutic equipment data display unit of this therapeutic equipment, and it supplies with the power supply of whole instrument.12 is laser instrument, produces the laser beam of treatment usefulness by it.By the leaded light seat 13 that is in it on same horizontal line laser beam is introduced laser tube 14 from the laser beam that laser instrument 12 produces, laser alignment 14 links with laser power monitor instrument 15.Be divided into sampling laser beam and work laser beam behind the laser beam process laser power monitor instrument 15.The work laser beam is still propagated along former beam direction, passes to leaded light joint 16, the laser beam change direction of propagation of will work, leaded light joint 16.When treating a patient, this therapeutic equipment just carries out work with the work laser beam.How to come laser power is monitored and will be described in accompanying drawing 5 with the sampling laser beam.
Referring to Fig. 5, Fig. 5 is the cut-open view of electrothermic type laser power monitor instrument in the utility model.Wherein beam-splitting plate 17 is contained on the beam-splitting plate base 18.Beam-splitting plate 17 adopts the zinc selenide optical material in the present embodiment, make through optical polish, certainly beam-splitting plate can adopt gallium arsenide or potassium chloride optical material, the direction of propagation of it and incoming laser beam 19 has a certain degree, and the endoporus 21 of beam-splitting plate base 18 side's of reaching stands 20 is also fixed thereon.After laser beam 19 was got on the zinc selenide beam-splitting plate 17, beam-splitting plate 17 was divided into two-beam to laser beam, i.e. folded light beam 22 and transmitted light beam 23.Transmitted light beam 23 is constant along the former direction of propagation.This Shu Guang will be used as laser therapy, so claim the work laser beam again, folded light beam (claiming the sampling laser beam again) 22 is propagated along another hole 25 on the square stand from opening window 24 ejaculations on beam-splitting plate base 18.Be equipped with the heat absorbing sheet 26 that a slice You Yong Opinions-Pictures copper product black chromium plating is made being sidelong, because heat absorbing sheet 26 absorbing sheets 26 are transformed into heat energy to luminous energy after absorbing the sampling laser beam facing to the hole 25 1 of square stand 20.In order to reduce the temperature of heat absorbing sheet 26, the hot prose style free from parallelism 27 of red copper is housed in the outside of heat absorbing sheet 26.Volume as a hot prose style free from parallelism 27 is less, so when laser therapeutic apparantus after the laser long-term irradiation, hot prose style free from parallelism temperature is raise, thereby bring the bad stability of therapeutic equipment, therefore also must cool off a hot prose style free from parallelism, present embodiment adopts water cooling.So in a hot prose style free from parallelism 27, have annular water tank 28, also have water inlet 29 to link to each other with water annulus 28 with water delivering orifice 30.The assembling that water-cooling apparatus is detailed can be referring to the explanation of accompanying drawing 7.The part of a hot prose style free from parallelism 27 in the hole 25 of the side's of leaning against stand 20 has the window 31 ， Opinions-Pictures copper heat absorbing sheets 26 of a printing opacity to be placed on this above window 31, and sampling laser beam 22 shines on the heat absorbing sheet 26 by window 31.Be fixing heat absorbing sheet, a pressure ring 32 is housed on heat absorbing sheet 26.As mentioned above, heat absorbing sheet 26 changes luminous energy into heat energy after absorbing sampling laser beam 22.Because present embodiment heat absorbing sheet 26 is adopted and use the Opinions-Pictures copper product, when it during by temperature rise and the hot prose style free from parallelism 27 of red copper just form thermopair, certain electromotive force generation is arranged on heat absorbing sheet 26.Be welded with lead-in wire behind the Zai Opinions-Pictures copper heat absorbing sheet 26, the positive pole for electromotive force output welds a lead-in wire in addition on a hot prose style free from parallelism 27, and as the negative terminal of heat absorbing sheet, electromotive force can directly be imported the prime amplifier 34 that is placed in the prime amplifier box 33.Prime amplifier box 33 is fixed on the hot prose style free from parallelism 27.Because the laser tube operating voltage is very high, and the output of the utility model heat absorbing sheet 26 only has the hundreds of microvolt, for fear of therapeutic equipment high pressure and other impulse disturbances, prime amplifier box 33 also has function of shielding, and the prime amplifier that is placed on wherein obtains good shield effectiveness.Electric signal by prime amplifier 34 output also will be handled, specifically referring to the detailed description of Fig. 9 a and Fig. 9 b.
Referring to Fig. 6 a and Fig. 6 b, Fig. 6 a is the synoptic diagram of the thermoelectric pile of electrothermic type laser power monitor instrument in the utility model, the cut-open view of Fig. 6 b for assembling between thermoelectric pile shown in Fig. 6 a and the heat absorbing sheet.Thermoelectric pile shown in this figure is another embodiment of the present utility model that is applicable to electrothermic type.The key distinction of this embodiment and the foregoing description is: heat absorbing sheet is to adopt copper or aluminum to make, and can not form thermopair with the hot prose style free from parallelism around it with the heat absorbing sheet 80 that copper or aluminium are made, therefore at the heat absorbing sheet 80 other lastblock thermoelectric piles 35 that paste, thermoelectric pile 35 is formed by a plurality of thermopair serial connections, 35a and 35b are the output terminals of thermoelectric pile, and these two ends are linked to the input end of prime amplifier 34.Described thermopair can be You Tong with the Opinions-Pictures copper product is formed, or form by bismuth and antimony material.
Referring to Fig. 7, Fig. 7 is the wiring layout of electrothermic type laser power monitor instrument water-cooling apparatus in the utility model, 12 laser instrument wherein, the 37th, the laser power monitor instrument, the 13rd, the leaded light seat, the 27th, the hot prose style free from parallelism in the laser power monitor instrument 37 has an annular water tank 28 in the hot prose style free from parallelism 27, and there are water inlet 29 and water delivering orifice 30 in annular water tank 28 both sides.A hot prose style free from parallelism 27 is to utilize the chilled water in the laser instrument 12 to cool off.Chilled water in the laser instrument 12 has a water delivering orifice 36, and the chilled water in the laser instrument 12 flows out from water delivering orifice 36, the annular water tank 28 behind the cooling fin in the laser window 37 before being contained in laser instrument 12 in the hot prose style free from parallelism 27 of inflow laser power monitor instrument 37.After supercooling, the reference temperature of a hot prose style free from parallelism 27 is constant, makes the laser power monitor instrument that good stable be arranged.Chilled water through an overheated prose style free from parallelism 27 flows in the cyclic water tank 38 that is placed in the laser therapeutic apparantus.Water in the cyclic water tank 38 flows back in the laser instrument 12 behind water pump wherein again.
Referring to Fig. 8, Fig. 8 is the cut-open view of the air-cooling apparatus of electrothermic type laser power monitor instrument in the utility model, this air-cooling apparatus 39 is right cylinder, be processed into the circular heatsink shape around it, so that more long-pending ground of multiaspect distribute heat is arranged, there is a circular hole at its middle part, wherein will place the interface portion 43 of heat absorbing sheet 40, the pressure ring 41 of pressing heat absorbing sheet 40 and square stand 42 and air-cooling apparatus 39.The volume of a hot prose style free from parallelism 27 is big in volume ratio the foregoing description of this air-cooling apparatus 39, so it can play the effect of water-cooling apparatus in the foregoing description as a hot prose style free from parallelism again.
Referring to Fig. 9 a and Fig. 9 b, Fig. 9 a and Fig. 9 b are the signal processing circuit block diagram and the circuit diagram of electrothermic type laser power monitor instrument in the utility model.The sampling laser beam 44 that is reflected by beam-splitting plate is transformed into heat after being absorbed by heat absorbing sheet.By the temperature difference on the thermopair detection heat absorbing sheet, produce one and the corresponding electric potential signal of sampling laser beam signal then.After this electromotive force amplifies via the input of operational amplifier 47 homophases, obtain one and sampling laser beam power corresponding voltage signal.And the relation of sampling laser beam power and laser beam power can be measured in advance by heat absorbing sheet, as a constant parameter.Input A/D change-over circuit 48 backs show the laser beam power value by charactron 49 after calibrating.Circuit diagram among Fig. 9 b has been represented among Fig. 9 a element and the element connecting relation in the block diagram between in-phase amplifier 47, A/D change-over circuit 48 and the charactron 49 particularly.
Referring to Figure 10, Figure 10 is the cut-open view of photoelectric type laser power monitor instrument in the utility model.Photoelectric type laser power monitor instrument is applicable to the laser instrument of making laser with He-Ne, and its structure is identical with above-mentioned electrothermic type laser power monitor instrument substantially, and just beam-splitting plate is formed different with detector.Present embodiment beam-splitting plate 50 is used K
9Glass or make oval wedge shape thin slice with silica glass material, it is fixed on the beam-splitting plate base 55.Can be angled between beam-splitting plate and the incoming laser beam 56.Detector is made up of diffusing globe 51, silicon photocell 52 or silicon diode, and silicon photocell 52 is fixed in the silicon photocell seat 53, and on silicon photocell seat 53 side's of being fixed on stands 54.When laser beam 56 shines on the beam-splitting plate 50, be divided into transmitted light and reflected light, reflected light only accounts for the very little part of laser beam.Its transmitted light 57 is propagated along the original direction of propagation, makes laser therapy usefulness, so claim working beam again.Its folded light beam 58 claims specimen beam again behind diffusing globe 51, and light beam is become diffused light.Silicon photocell 52 produces electric signal after receiving the casual time, and the signal processing circuit of this electric signal input back is carried out signal Processing (this part circuit is not shown in the figures) back and shown laser power value by charactron or pointer header.
Referring to Figure 11 a and Figure 11 b, Figure 11 a and Figure 11 b are the block diagram and the circuit diagram of the signal processing circuit of photoelectric type laser power monitor instrument in the utility model.The sampling laser beam that is reflected by beam-splitting plate becomes diffused light to light beam behind diffusing globe 61.After receiving diffused light, silicon photocell 62 produces electric signal, this electric signal input current electric pressure converter is that I-V circuit 63 backs become voltage signal to the photocurrent of above-mentioned silicon photocell 62 outputs, shows laser power value by charactron 65 again behind A/D change-over circuit 64.The physical circuit of I-V circuit 63, A/D change-over circuit 64 and charactron 65 and be coupled to each other to close to tie up among Figure 11 b and represented.
Above preferred embodiment of the present utility model is described, certain content of the present utility model is not limited to the content of described embodiment.As long as do not exceeding summary of the invention scope of the present utility model, this professional those of ordinary skill can be done to change or revise to the utility model, revise or change after this device must be within the scope that the utility model claim is protected.
Claims (8)
1, a kind of laser power monitor instrument that laser power is monitored, comprise the detector that laser is surveyed, the signal processing circuit that the above-mentioned electric signal that is recorded by detector is handled, it is characterized in that: between above-mentioned detector and laser instrument, have an incoming laser beam to be divided into the beam-splitting plate of the different two light beams in the direction of propagation, wherein have a branch of light identical with the incident light direction of propagation.
2, by the described laser power monitor instrument of claim 1, it is characterized in that: the above-mentioned beam-splitting plate and the incoming laser beam direction of propagation have a certain degree.
3, by the described laser power monitor instrument of claim 1, it is characterized in that: above-mentioned beam-splitting plate is by K
9Glass or quartz glass are made, and above-mentioned detector is made up of diffusing globe and silicon photocell or silicon diode.
4, by the described laser power monitor instrument of claim 1, it is characterized in that: above-mentioned beam-splitting plate is to adopt the zinc selenide luminescent material: heat absorbing sheet that above-mentioned detector is made You Yong Opinions-Pictures copper product and the thermopair that the temperature difference can be become electric potential signal are formed; In this detector heat in the exterior prose style free from parallelism; Above-mentioned thermopair is made up of a heat absorbing sheet and an above-mentioned hot prose style free from parallelism.
5, by the described laser power monitor instrument of claim 4, it is characterized in that: above-mentioned detector is made up of heat absorbing sheet made from copper or aluminum and the thermopair that the temperature difference on the heat absorbing sheet can be transformed into electric potential signal.
6, by the described laser power monitor instrument of claim 4, it is characterized in that: the cooling device that an above-mentioned hot prose style free from parallelism is cooled off is made up of the annular water tank in a hot prose style free from parallelism.
7, by the described laser power monitor instrument of claim 4, it is characterized in that: above-mentioned cooling device is an air hot prose style free from parallelism good with the detector thermo-contact.
8, by the described laser power monitor instrument of claim 4, it is characterized in that: the above-mentioned amplification circuit of electrical signal that is included in the signal processing circuit is placed in the shielding box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88207952 CN2033504U (en) | 1988-06-03 | 1988-06-03 | Medical laser power monitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88207952 CN2033504U (en) | 1988-06-03 | 1988-06-03 | Medical laser power monitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2033504U true CN2033504U (en) | 1989-03-01 |
Family
ID=4841897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88207952 Withdrawn CN2033504U (en) | 1988-06-03 | 1988-06-03 | Medical laser power monitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2033504U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106932175A (en) * | 2017-04-07 | 2017-07-07 | 吉林省科英激光股份有限公司 | A kind of laser cure apparatus power/energy detection means and method |
-
1988
- 1988-06-03 CN CN 88207952 patent/CN2033504U/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106932175A (en) * | 2017-04-07 | 2017-07-07 | 吉林省科英激光股份有限公司 | A kind of laser cure apparatus power/energy detection means and method |
| CN106932175B (en) * | 2017-04-07 | 2019-02-01 | 吉林省科英激光股份有限公司 | A kind of laser cure apparatus power/energy detection device and method |
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| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |