CN1050773A - The optical fiber of guiding laser beam - Google Patents
The optical fiber of guiding laser beam Download PDFInfo
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- CN1050773A CN1050773A CN 89107786 CN89107786A CN1050773A CN 1050773 A CN1050773 A CN 1050773A CN 89107786 CN89107786 CN 89107786 CN 89107786 A CN89107786 A CN 89107786A CN 1050773 A CN1050773 A CN 1050773A
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- optical fiber
- laser beam
- vibrating elements
- guiding laser
- fiber
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- Radiation-Therapy Devices (AREA)
Abstract
A kind of optical fiber of guiding laser beam is equipped with a vibrating elements at the top of optical fiber, and this vibrating elements can make the transverse vibration of the top of optical fiber along fiber axis.Owing to the effect of vibrating elements makes the transverse vibration of the top of optical fiber along fiber axis, thereby make the periodically vibration back and forth of irradiated site of laser beam, therefore can in very wide scope, carry out laser radiation.
Description
The present invention relates to a kind of optical fiber of guiding laser beam, relate to a kind of optical fiber of guiding laser beam that for example is used for lesion portion being carried out the catheter of irradiation treatment specifically with laser beam.
Worked out at present the catheter that is used to send laser, it can and make the pathological tissues evaporation mode that is heated remove the lesion portion of health with laser beam irradiation, the thrombus in the blood vessel for example, and these positions are places that the operator can not directly get at.In this laser medicine conduit, an optical fiber (optical fiber of guiding laser beam) is housed, in order to laser beam is sent to the top of conduit.
Use the optical fiber of conventional guiding laser beam, because radiant light has adopted the form of light pencil,, therefore there is following problem: for example so that increase radiant energy density, when the lesion portion of treatment such as the block part in the blood vessel, be difficult to make the top of conduit to move laterally.
That is to say that when lesion portion was horizontal expansion and need laser beam in the irradiation of the scope of broad, the top of the optical fiber of guiding laser beam should separate with lesion portion, but the energy density of laser beam irradiation is reduced.Therefore, need strengthen the gross energy of the laser beam of the optical fiber that enters the light conducting light beam, so that there are enough energy that lesion portion is shone.Yet when increasing the energy of laser beam, the optical fiber of guiding laser beam is easy to burn because of laser beam energy increases.
The present invention be directed to the problems referred to above and propose, its objective is the optical fiber that a kind of guiding laser beam is provided, it can transmit a large amount of laser beam irradiation energy, and can be with the whole lesion portion of this laser beam irradiation.
Optical fiber according to guiding laser beam of the present invention is characterized in that settling a vibrating elements at the position, top of optical fiber, and this vibrating elements can make the transverse vibration of fiber tip along fiber axis.
Like this, because the optical fiber top is under the vibrating elements effect and along the transverse vibration of fiber axis, the periodically vibration back and forth of the irradiated site of laser, therefore the optical fiber of guiding laser beam of the present invention can carry out the laser radiation in the wide range.
Following accompanying drawing with reference to the embodiment of the invention is for a more detailed description to the optical fiber of guiding laser beam of the present invention.
Fig. 1 is the sectional view of an embodiment of the optical fiber of guiding laser beam of the present invention;
Fig. 2 is the front view of the foregoing description, the mode of vibration of this optical fiber shown in the figure;
Fig. 3 is the sectional view of an embodiment of catheter that is used to send the optical fiber that guiding laser beam is housed of laser;
Fig. 4 is the sectional view at another embodiment top of the optical fiber of guiding laser beam of the present invention;
Fig. 5 illustrates a kind of method of the optical fiber that uses guiding laser beam of the present invention.
The optical fiber 1 of the guiding laser beam shown in Fig. 1 comprises the rectangular columniform crust 12 of an optical fiber 11, a receiving optical fiber 11 and as the piezoelectric oscillator 13a and the 13b of vibrating elements.Have only the top of optical fiber 11 to stretch out outside the crust 12, this extension is to be clipped between piezoelectric oscillator 13a within the crust top and the 13b.
As for optical fiber 11, from existing optical fiber, select any all can, for example optical fiber of the plastic skin of silica fiber, silica core, plastic optical fiber or the like, its selection depends on used laser type.What is particularly worth mentioning is that, when using excimer laser to produce laser, preferably use the optical fiber of pure silicon stone core, because this optical fiber can transmit excimer pulsed laser beam with high-energy-density and low-loss.
Among piezoelectric oscillator 13a shown in Fig. 2 and the 13b each all is within the cylindrical space that is fixedly mounted between optical fiber 11 and the crust 12.When applying voltage, the direction of vibration of piezoelectric oscillator makes the interior ring that contacts with optical fiber 11 and changes with distance between the outer shroud that crust 12 contacts.In addition, shown in Fig. 2 arrow, the phase place of the variation in thickness of two piezoelectric oscillator 13a and 13b is opposite, so that the optical fiber that is clipped on two limit can stationary vibration.Therefore, the multiple opposite method of phase place that makes the variation in thickness of two oscillator 13a and 13b is arranged.For example, that only is connected as shown in Figure 1 two piezoelectric oscillator 13a and 13b, and they change with identical direction, and therefore, when the phase place of the voltage that applies was opposite, the phase place of two oscillator variation in thickness also was opposite.
As for piezoelectric oscillator, can use any existing piezoelectric oscillator, for example one-component system is (as BaTiO
3), two-component system is (as PbTiO
3-PbZrO
3) and three-component system (as Pb(Ti, Zr) O
3Alloy with the 3rd component) crystal oscillator of and so on ceramic resonator and image-stone English oscillator and so on.
Be used for vibrating elements of the present invention and be not limited to above-mentioned this piezoelectric oscillator, also can make the vibrative oscillator of a kind of magnetic material energy thereby for example induce oscillating magnetic field with the oscillator of other types with electromagnetic devices such as coils.
In the optical fiber 1 of guiding laser beam shown in Figure 1, the laser beam that conducts by optical fiber 11 radiates from optical fiber 11 tops.Owing to the effect of piezoelectric oscillator 13a and 13b makes the transverse vibration of this top along fiber axis, thereby make the periodically vibration back and forth of irradiated site of laser beam, so the range of exposures of laser beam has just enlarged.
The optical fiber 1 of guiding laser beam can be packed conduit A into so that send laser, for example, and as shown in Figure 3.The conduit A of sent laser shown in Figure 3 comprises: be included in the optical fiber 1 of the above-mentioned guiding laser beam in the rectangular cylindrical crust 7, peep in being used for and observe and the video optical fiber 2 of spectrum observation, an air bag (for example being provided with for fixing top, not shown) is provided the conduit 5 of inflation gas and is used to the conduit 6 getting rid of blood or impose medicine. Optical fiber 1 and 2 and conduit 5 and 6 between the space, be filled with the transparent medium of forming by the material that can see through visible light 3, transparent resin and multicomponent glass that for example a kind of flexibility is good.This transparent medium 3 can be used as the usefulness of photoconduction simultaneously, so that throw light at the top.In addition, a through hole 4 also can be set,, control in order to top to conduit so that put in a control line through this through hole.
Another embodiment of the optical fiber of guiding laser beam of the present invention as shown in Figure 4.In this embodiment, vibrating elements is a ultrasonic oscillator, also is a ultrasonic detector simultaneously, and it can make the transverse vibration of the top of described optical fiber along fiber axis.Oscillation electrode 14a and 14b make it to send ultrasound wave along fiber axis to the excited vibrational element, simultaneously along fiber axis to detecting ultrasound wave.
Followingly a kind of method of the optical fiber that uses above-mentioned guiding laser beam is described with reference to Fig. 5.
The fiber tip of guiding laser beam is imported near the block part 15 in the blood vessel, and with this blocking portion of laser beam irradiation by optical fiber so that it is removed by evaporation.Meanwhile, vibrating elements gives off ultrasound wave, simultaneously detects the reflection wave that reflects from block part and/or vascular wall with this vibrating elements.In this way, can estimate the evaporation degree that causes by laser beam irradiation.Have again,, can measure the distance of the fiber tip of guiding laser beam from blocking portion by hyperacoustic reflection.Also have, for example by forming vibrating elements, and make their phase lag that excites, thereby can in blood vessel, carry out ultrasonic scanning with a plurality of oscillators.In this case, can also determine the shape of blocking portion.Because ultrasound wave not only in the tissue surface reflection, also can enter and knit inside, therefore also can understand the inner case of blocking portion.In addition,, also can measure blood flow rate, thereby can determine that making blood due to illness become partly to be removed by laser radiation recovers mobile by measuring Doppler's migration of the reflection wave of blood cell in the blood.
The optical fiber of guiding laser beam of the present invention is not limited to the foregoing description, and many modification designs can be arranged in claim scope of the present invention.For example, though used two piezoelectric oscillators in above-described embodiment, the number of vibrating elements also can be one.Have, vibrating elements also not necessarily will be fixed on the optical fiber again.The vibration state of fiber tip can or be pulled out optical fiber by random insertion and be changed, and excites the position so that change it.
Because its fiber tip of optical fiber of guiding laser beam of the present invention is along the transverse vibration of fiber axis, thereby make the periodically vibration back and forth of irradiated site of laser beam, therefore the range of exposures of laser has just enlarged as a whole.Like this, although the fiber tip of guiding laser beam can be very near lesion portion, but still can shine, thereby can in wide range, carry out safe treatment simultaneously whole lesion portion.
Claims (2)
1, a kind of optical fiber of guiding laser beam comprises an optical fiber, it is characterized in that also comprising a vibrating elements, and this vibrating elements can make the transverse vibration of the top of described optical fiber along fiber axis.
2, the optical fiber of guiding laser beam as claimed in claim 1, it is characterized in that, described vibrating elements is a ultrasonic oscillator, also be a ultrasonic detector simultaneously, it can make the transverse vibration of the top of described optical fiber along fiber axis, and can also can detect from being positioned at the ultrasound wave that object reflected on the shaft axis of optic fibre along the axial radiate supersonic wave of optical fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89107786 CN1024846C (en) | 1989-10-05 | 1989-10-05 | Laser beam guiding fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89107786 CN1024846C (en) | 1989-10-05 | 1989-10-05 | Laser beam guiding fiber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1050773A true CN1050773A (en) | 1991-04-17 |
| CN1024846C CN1024846C (en) | 1994-06-01 |
Family
ID=4857336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89107786 Expired - Fee Related CN1024846C (en) | 1989-10-05 | 1989-10-05 | Laser beam guiding fiber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1024846C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102395872A (en) * | 2009-04-15 | 2012-03-28 | 迪特马尔·奥伯霍夫 | Ultrasonic testing system |
| US20120247327A1 (en) * | 2010-09-27 | 2012-10-04 | Conocophillips Company | Hollow-fiber membrane contactors |
| CN110478035A (en) * | 2019-09-11 | 2019-11-22 | 河北大学附属医院 | Laparoscope Intelligent Laser operating parts |
-
1989
- 1989-10-05 CN CN 89107786 patent/CN1024846C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102395872A (en) * | 2009-04-15 | 2012-03-28 | 迪特马尔·奥伯霍夫 | Ultrasonic testing system |
| CN102395872B (en) * | 2009-04-15 | 2013-11-13 | 迪特马尔·奥伯霍夫 | Ultrasonic testing system |
| US20120247327A1 (en) * | 2010-09-27 | 2012-10-04 | Conocophillips Company | Hollow-fiber membrane contactors |
| CN110478035A (en) * | 2019-09-11 | 2019-11-22 | 河北大学附属医院 | Laparoscope Intelligent Laser operating parts |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1024846C (en) | 1994-06-01 |
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