CN108703744A - Transparence ultrasonic transducer and application - Google Patents
Transparence ultrasonic transducer and application Download PDFInfo
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- CN108703744A CN108703744A CN201810515835.9A CN201810515835A CN108703744A CN 108703744 A CN108703744 A CN 108703744A CN 201810515835 A CN201810515835 A CN 201810515835A CN 108703744 A CN108703744 A CN 108703744A
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- 238000003384 imaging method Methods 0.000 claims description 16
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
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- 229910021389 graphene Inorganic materials 0.000 claims description 8
- 238000007493 shaping process Methods 0.000 claims description 8
- 238000003325 tomography Methods 0.000 claims description 8
- 238000001839 endoscopy Methods 0.000 claims description 5
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0093—Detecting, measuring or recording by applying one single type of energy and measuring its conversion into another type of energy
- A61B5/0095—Detecting, measuring or recording by applying one single type of energy and measuring its conversion into another type of energy by applying light and detecting acoustic waves, i.e. photoacoustic measurements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
- B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
- B06B1/06—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with piezoelectric effect or with electrostriction
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
- B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
- B06B2201/00—Indexing scheme associated with B06B1/0207 for details covered by B06B1/0207 but not provided for in any of its subgroups
- B06B2201/70—Specific application
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Abstract
The invention discloses a kind of transparence ultrasonic transducer (18) and applications, and the transparence ultrasonic transducer (18) includes the back sheet (8) of the piezoelectric unit (6) of transparence, the electrode (7) of transparence, transparence；The electrode (7) of the transparence is attached to the two sides of the piezoelectric unit (6) of transparence, the piezoelectric unit (6) that two sides is attached with the transparence of the electrode (7) of the transparence is pasted on the back sheet (8) of transparence, and connecting wire encapsulates to form transparence optoacoustic probe (15).In the application, in order to reduce transparent polarizing electrode (7) low conductivity influence, connect high input impedance amplifier carry out signal amplification in favor of later signal acquisition detection.Transparence ultrasonic transducer (18) can reduce the difficulty and cost of design in the application, and enhance the effect of optoacoustic detection.
Description
Technical field
The present invention relates to a kind of detection devices, pop one's head in and apply more particularly to a kind of optoacoustic of transparence.
Background technology
Photoacoustic imaging is a kind of based on optoacoustic effect, the emerging imaging skill with huge biomedical applications potentiality
Art.In optoacoustic effect, when ultra-short pulse laser is irradiated to tissue, since the photon of part is absorbed by biological tissue, group
It knits therefore heated instantaneous expansion to generate ultrasound and detected to obtain by ultrasonic transducer, divide eventually by gained ultrasonic signal
Analysis, so that it may to obtain the distribution situation of absorber in tissue.Due to photoacoustic imaging using light carry out signal excitation, and using by
The smaller ultrasound of tissue scatter is as signal detection means, therefore it combines in light imaging and organizes high optical contrast, and
High ultrasound resolution ratio and the characteristics of high-penetration depth in ultrasonic imaging, has been widely used in lesion detection, Tissue Blood at present
In the various biomedical applications such as pipe imaging.
However common photoacoustic imaging or detection in, used in ultrasonic transducer generally use piezoelectric ceramics, piezoelectricity
The piezoelectric materials such as monocrystalline or piezo-electricity composite material and PVDF are as piezoelectric unit；Its electrode also generally uses metal electrode；This
Outside, in many cases, the back lining materials of ultrasonic transducer, acoustic lens material etc. are typically also opaque, therefore entire ultrasound
Energy converter is typically opaque.In this case, in order to carry out photoacoustic imaging, ultrasound is generally got around using illumination path and is changed
The mode of energy device supersonic sounding route；Or the ultrasonic transducer that customization is hollow, retaining on ultrasonic transducer can be with thang-kng
Aperture carries out optical illumination, significantly increases the difficulty and cost of system design.Simultaneously in this case, it is also difficult to reach most
Good lighting effect.It sometimes, also can be for the effect of preferable lighting effect sacrifice supersonic sounding.
Invention content
The purpose of the invention is to overcome the opaque increase system design difficulty of ultrasonic transducer of the existing technology
And cost and the problem of influence lighting effect, a kind of transparence ultrasonic transducer, the transparence ultrasonic transduction utensil are provided
Having can allow in optoacoustic detection that incident light is smaller to be influenced by ultrasonic transducer so that system is designed with better freedom
Degree, and enhance the effect of optoacoustic detection as far as possible.
To achieve the goals above, one aspect of the present invention provides a kind of transparence ultrasonic transducer, includes the pressure of transparence
The back sheet of electric unit, the electrode of transparence, transparence；The electrode of the transparence is attached to the piezoelectric unit of transparence
Two sides, the piezoelectric unit that two sides is attached with to the transparence of the electrode of the transparence paste back sheet in transparence
On.
Further, the transparence piezoelectric unit is using transparences such as PVDF piezoelectric membranes or lithium niobate monocrystals
Piezoelectric material makes；The transparent polarizing electrode is using graphene, oxide film (TCOs) or tin-doped indium oxide (ITO) etc.
Common transparent electrode material makes, and the transparence back sheet is made of transparent material；The transparent polarizing electrode is directly and institute
The contact of transparence piezoelectric unit is stated, alternatively, passing through a transparence adhesive layer or matching layer and the transparence piezoelectric unit phase
Even, not direct to be contacted with the transparence piezoelectric unit.
Further, the transparent polarizing electrode uses the electrode pattern of array, carries out array focusing；The transparence electricity
The electrode pattern that pole uses is Concentric circle array.
Second aspect of the present invention provides a kind of optoacoustic probe of transparence, including outside transparence ultrasonic transducer, transparence
Shell and conducting wire；The transparence shell is equipped with connecting platform, and the transparence ultrasonic transducer is connect with the connecting platform,
The conducting wire is connect with the electrode of the transparence of the transparence ultrasonic transducer, and described conducting wire one end is drawn from transparence shell
Go out, the other end is equipped with plug.
Third aspect present invention provides a kind of optoacoustic detection system popped one's head in based on transparence optoacoustic, including transparence optoacoustic
Probe, amplifier, signal acquiring system, transparence optoacoustic probe include transparence ultrasonic transducer, transparence shell and
Conducting wire, the amplifier using input impedance megaohm or more high input impedance amplifier, the amplifier and the transparence
Optoacoustic probe, the signal acquiring system are separately connected.
Further, the amplifier uses charge amplifier.
Further, it is installed additional between the amplifier of the high input impedance and the signal acquiring system conventionally used
Signal is further amplified in ultrasound or radio frequency amplifier, carries out signal detection or imaging.
Fourth aspect present invention provides a kind of transparence focused ultrasonic sensor based on transparence ultrasonic transducer, including
The transparence ultrasonic transducer and transparence acoustic lens, the transparence acoustic lens use the acrylic or resin of transparence
It makes, adheres to the transparence ultrasonic transducer on the transparence acoustic lens.
Fifth aspect present invention provides a kind of ball array photoacoustic tomography system based on transparence ultrasonic transducer,
Including transparence ultrasonic transducer ball type array, high input impedance amplifier, signal acquiring system, the transparence ultrasonic transduction
Device ball type array includes multiple transparence ultrasonic transducers and transparent rack, and the transparence ultrasonic transducer is mounted on described
On bright holder, the transparence ultrasonic transducer ball type array is connect with the high input impedance amplifier, the high input resistance
Anti- amplifier is connect with the signal acquiring system.
Sixth aspect present invention provides a kind of sound focusing optoacoustic endoscopy probe based on transparence ultrasonic transducer, feature
It is, including beam shaping lens, transparence ultrasonic transducer, transparence acoustic lens, 45 degree of rotation light supersonic reflectoscopes, transparent
Outside the pale of civilization shell, conducting wire, transparence shell one end are equipped with circular hole, and 45 degree of rotations light supersonic reflectoscope passes through rotation axis on one side
In interspersed and circular hole, the beam shaping lens, transparence ultrasonic transducer, transparence acoustic lens are sequentially arranged at outside transparence
The other end of the other end of shell, the transparence shell is connect with endoscope, and the conducting wire is drawn from the transparence shell,
The other end is equipped with plug.
Through the above technical solutions, the beneficial effects of the invention are as follows：In common optoacoustic detection system, due to used
Ultrasonic transducer is usually opaque, therefore input path in system and acoustic detection part are separated.This not only pole
The big difficulty for increasing system design, and be inevitably balanced between the detection of incident optical illumination harmony, shadow
The effect of system optoacoustic detection is rung.The present invention proposes a kind of implementation of transparence ultrasonic transducer so that light enters
Penetrating can not be limited by ultrasonic probe itself, give the great degree of freedom of system, to the energy pole under various application occasions
The comprehensive performance of big lifting system.
In addition, transparence sonac and its signal detection method proposed by the invention, can be applied in needs
The occasion for wanting transparence sonac the case where needs simultaneously such as optical detection and supersonic sounding, and is needed through ultrasound
Detector carries out the case where optical observation etc..
Description of the drawings
Fig. 1 a are ultrasonic transducer arrangement schematic diagrams in probe；
Fig. 1 b are ultrasonic transducer arrangement schematic diagrams in probe；
Fig. 1 c are ultrasonic transducer arrangement schematic diagrams in probe；
Fig. 2 is the structural schematic diagram of transparence optoacoustic probe；
Fig. 3 is the optoacoustic detection system structure diagram popped one's head in based on transparence optoacoustic；
Fig. 4 a are transparence ultrasonic transducer composition schematic diagrams；
Fig. 4 b are transparence ultrasonic transducer composition schematic diagrams；
Fig. 4 c are transparence ultrasonic transducer composition schematic diagrams；
Fig. 5 is the comparison figure using the made transparence optoacoustic probe detection efficiency of various concentration graphene solution；
Fig. 6 is the common photoacoustic tomography system structure diagram based on ball array；
Fig. 7 is the ball array photoacoustic tomography system construction drawing based on transparence ultrasonic transducer；
Fig. 8 is the sound focusing optoacoustic endoscopy sonde configuration figure based on transparence ultrasonic transducer.
Reference sign
1 ultrasonic transducer, 2 incident beam, 3 Perimeter Truss Reflector
4 sample tissue, 5 optical fiber, 6 transparence piezoelectric unit
7 transparent polarizing electrode, 8 transparence back sheet, 9 transparence adhesive layer
10 transparence acoustic lens, 11 transparent outer cover, 12 ultrasound
13 45 degree of 14 beam shaping lens of rotation light/supersonic reflectoscope, 15 transparence optoacoustic probes
16 conducting wire, 17 connecting platform, 18 transparence ultrasonic transducer
19 transparence ultrasonic transducer ball array, 20 ultrasonic transducer ball array
Specific implementation mode
Embodiment 1
As shown in fig. 4 a, the transparence ultrasonic transducer 18 is using transparent piezoelectrics materials such as PVDF thin films or derivatives thereof
As transparence piezoelectric unit 6, using transparent graphene conductive film as transparent polarizing electrode 7, in the transparence piezoelectricity list
The transparent polarizing electrode 7 is adhered on first 6 surfaces, and the PvDF piezoelectric membranes that two sides is attached with to transparent graphene conductive film are pasted
Transparence ultrasonic transducer 18 is fabricated on transparence back sheet 8；In addition, electrode material can use oxide film (TCOs)
Or the transparences conductive film such as tin-doped indium oxide (ITO) substitutes；Piezoelectric material can use other pressures of the transparences such as lithium niobate
Electric material substitutes；Transparence back sheet 8 can be substituted with opacifying material.
As shown in Figure 4 b, the transparent polarizing electrode 7 can not also be in direct contact the piezoelectric unit, but thoroughly by one
Brightization adhesive layer 9 or matching layer are connected with the transparence piezoelectric unit 6.
As illustrated in fig. 4 c, the acrylic or resin of transparence can also be adhered on the transparence ultrasonic transducer 18
The transparence acoustic lens 10 of material, to be fabricated to the focused ultrasonic sensor of transparence.
Embodiment 2
As shown in Fig. 2, a kind of transparence optoacoustic probe 15, including transparence ultrasonic transducer 18, transparence shell 11 and
Conducting wire 16；The transparence shell 11 is equipped with connecting platform 17, the transparence ultrasonic transducer 18 and the connecting platform
17 connections, the conducting wire 16 connect with the transparent polarizing electrode 7 of the transparence ultrasonic transducer 18, and 16 one end of the conducting wire is from saturating
Bright outside the pale of civilization shell 11 is drawn, and the other end is equipped with plug.
Embodiment 3
As shown in figure 3, the optoacoustic detection system based on transparence optoacoustic probe, including transparence optoacoustic probe 15, amplification
Device, signal acquiring system, the transparence optoacoustic probe 15 includes transparence ultrasonic transducer 18, transparence shell 11 and conducting wire
16, with 15 amplifier that is connected of transparence optoacoustic probe use input impedance megaohm or more high input impedance amplification
Device, the amplifier connect the signal acquiring system, in amplifier and the signal acquiring system of the high input impedance
Between can install conventionally used ultrasound or radio frequency amplifier additional, signal is further amplified；The amplifier connects the signal
Acquisition system, the signal acquiring system transmit a signal to computer analysis；In optoacoustic effect, when ultra-short pulse laser shines
When being mapped in sample tissue 4, since the partial photonic of incident beam 2 is absorbed by biological sample tissue 4, sample tissue 4 therefore by
Hot instantaneous expansion generates 15 detection of transparence optoacoustic probe that is ultrasonic and being mounted with transparence ultrasonic transducer 18 and obtains,
After ultrasonic signal is strengthened by the conversion of the transparence ultrasonic transducer 18 and the amplifier of the high input impedance, by signal
Acquisition system acquires, and is finally transferred to computer and is analyzed.
In common photoacoustic imaging, since the electrode of its ultrasonic transducer 1 generally uses metal electrode, electric conductivity is very
It is high.Correspondingly, at present in optoacoustic or supersonic sounding, signal amplifier used is generally with the voltage amplification of low input impedance
Device (being typically 50 or 75 Europe input impedance), such as usually dedicated ultrasonic amplifier or radio frequency amplifier.However, due to
The conductivity of transparence electrode material is relatively low, and impedance is very big, therefore it is very low using voltage amplifier to will result in input voltage,
It cannot carry out effective detection of signal.In the present invention, with transparence optoacoustic probe 15 be connected be high input impedance amplification
Device (input impedance be megaohm or more), therefore can be very good to match the high impedance of transparent polarizing electrode 7, to effectively carry out letter
Number detection.
Embodiment 4
As shown in fig. 7, the ball array photoacoustic tomography system based on transparence ultrasonic transducer, including transparence are super
Sonic transducer ball array, the amplifier of high input impedance, signal acquiring system and photoacoustic tomography system, spherical array are disbursed from the cost and expenses
Frame is made transparent, and the ultrasonic transducer that the ball array rack surface is equipped with a certain number of transparences forms described
Brightization ultrasonic transducer ball array, the amplifier of the transparence ultrasonic transducer ball array connection high input impedance, institute
The amplifier for stating high input impedance connects the signal acquiring system, the signal acquiring system transmit a signal to computer into
Row tomography；Allow incident beam 2 directly to be illuminated from array outer surface to target, not only greatly simplifies in this way and be
The difficulty for design of uniting, and given the degree of freedom of illumination bigger so that illumination evenly can be carried out to object from multi-direction,
Obtain stronger imaging effect.
Embodiment 5
As shown in figure 8, the sound focusing optoacoustic endoscopy probe based on transparence ultrasonic transducer, including beam shaping lens
14, transparence ultrasonic transducer 18, transparence acoustic lens 10,45 degree of rotation light supersonic reflectoscopes 13, transparence shell 11, conducting wires
16, described 11 one end of transparence shell is equipped with circular hole, and 45 degree of rotation light supersonic reflectoscope 13 is interspersed by rotation axis on one side
With circular hole, the beam shaping lens 14, transparence ultrasonic transducer 18, transparence acoustic lens 10 are sequentially arranged at transparence
The other end of the other end of shell 11, the transparence shell 11 is connect with endoscope, and the conducting wire 16 is outside the transparence
It is drawn in shell 11, the other end is equipped with plug.
Incident beam 2 can be directly through the transparence ultrasonic transducer 18 with transparence acoustic lens 10, so in this example
Lateral sample tissue 4 of popping one's head in is illuminated by 45 degree of rotation light/supersonic reflectoscopes 13 afterwards, then collects and is laterally reflected back
12 signal of ultrasound come.Wherein, in order to control 2 radiation modality of incident beam, and overcome transparent acoustic lens to incident beam 2
Influence, can also pop one's head in before 15 in transparence optoacoustic plus 14 groups of a set of beam shaping lens make light focus in target,
Or give the illumination of target evenly.In addition, the form of free light may be used in incident beam 2 in this example.It in this way can be with
The light of bigger is generated by area and intensity of illumination, and is easier to control the lighting system of incident light so that light penetrates object more
Deeply evenly, to significantly enhance the penetration depth and imaging effect of optoacoustic endoscopy imaging.
Embodiment 6
As shown in figure 5, using the Shi Moxirongye [ of different volumes percentage;PEDOT:PSS solution, PEDOT be EDOT (3,
4- ethene dioxythiophenes monomer) polymer, PSS is Ju Benyixihuangsuanyan ]The transparence PVDF thin film probe of making carries out
When supersonic sounding, the amplitude size of gained signal.Wherein, former graphene solution (PEDOT:PSS solution) solid content be 1.0%~
1.5%, conductivity is 450~600S/cm.It, can be by this graphene solution (PEDOT when making:PSS solution) and different proportion
Pure water mixing, drop in PVDF thin film surface natural air drying and form electrode.In experiment, is put down and visited using the ultrasound of a 10MHz
Hair goes out ultrasonic signal, is popped one's head in the PVDF transparences made to be received at the positions distance 5cm.It can from figure
Go out, with the reduction (its light transmittance will be substantially reduced) of graphene solution volume fraction, obtained ultrasonic signal intensity starts
When be held essentially constant (with using the PVDF probe detection efficiency of metal electrode it is suitable), and only work as PEDOT:PSS solution
When volume fraction is reduced to 2% or less, obtained ultrasonic signal intensity just starts to reduce, and at this moment probe has extraordinary
Mainly popped one's head in each layer of light rate, wherein light reflects, absorption it is considerably less.But, with the improvement of manufacture craft, light transmission
Rate can have a greater degree of promotion.
Comparative example 1
As shown in Fig. 1 a, 1b, 1c, in Fig. 1 a incident beam 2 need by Perimeter Truss Reflector 3 formed an annular beam around
Over-focusing ultrasonic transducer is irradiated imaging to sample tissue 4；In Fig. 1 b, illuminated by the way of light vertical incidence,
But ultrasonic transducer 1 is tilting to be detected；In Fig. 1 c, using hollow ultrasonic transducer 1, optical fiber 5 is allowed to pass through ultrasonic transducer 1
It is incident that the aperture at center carries out light.Since ultrasonic transducer 1 is lighttight in these systems, system is greatly increased
The difficulty of design, and reduce the best optoacoustic detection effect being likely to be breached.
Comparative example 2
As shown in fig. 6, the typical photoacoustic tomography system based on ball array.Certain amount ultrasonic detector 1 exists
Ball array surface distributing installation forms a ultrasonic detector ball array 20.Since ultrasonic detector 1 is opaque, institute
It is generally illuminated from array top with incident beam 2, or branched optical fiber is installed in ultrasonic detector ball array 20 and is illuminated.
In addition, in order to enhance the effect of system imaging, generally also need to when being scanned, it is spherical to rotate entire ultrasonic detector
Array 20, to receive the photoacoustic signal on more perspective.Therefore the difficulty of system design is greatly increased, and reducing can
Attainable best optoacoustic detection effect.
The preferred embodiment of the present invention is described in detail above in association with attached drawing, still, the present invention is not limited thereto.
Claims (10)
1. a kind of transparence ultrasonic transducer, which is characterized in that the electrode of piezoelectric unit (6), transparence including transparence
(7), the back sheet (8) of transparence；The electrode (7) of the transparence is attached to the two sides of the piezoelectric unit (6) of transparence, two sides
The piezoelectric unit (6) for being attached with the transparence of the electrode (7) of the transparence is pasted on the back sheet (8) of transparence.
2. transparence ultrasonic transducer according to claim 1, which is characterized in that the transparence piezoelectric unit (6) is adopted
It is made of PVDF piezoelectric membranes or lithium niobate monocrystal；The transparent polarizing electrode (7) using graphene, oxide film or
Tin-doped indium oxide makes, and the transparence back sheet is made of transparent material；The transparent polarizing electrode (7) directly with it is described
Brightization piezoelectric unit (6) contacts, alternatively, passing through a transparence adhesive layer (9) or matching layer and the transparence piezoelectric unit
(6) it is connected, it is not direct to be contacted with the transparence piezoelectric unit (6).
3. transparence ultrasonic transducer according to claim 1, which is characterized in that the transparent polarizing electrode (7) uses battle array
The electrode pattern of column carries out array focusing；The electrode pattern that the transparent polarizing electrode (7) uses is Concentric circle array.
4. a kind of optoacoustic of transparence is popped one's head in, which is characterized in that including transparence ultrasonic transducer (18), transparence shell (11)
And conducting wire (16)；The transparence shell (11) is equipped with connecting platform (17), the transparence ultrasonic transducer (18) and institute
Connecting platform (17) connection is stated, the conducting wire (16) and the electrode (7) of the transparence of the transparence ultrasonic transducer (18) connect
It connects, described conducting wire (16) one end is drawn from transparence shell (11), and the other end is equipped with plug.
5. a kind of optoacoustic detection system based on transparence optoacoustic probe, including transparence optoacoustic probe (15), amplifier, signal
Acquisition system, which is characterized in that the transparence optoacoustic probe (15) includes transparence ultrasonic transducer (18), transparence shell
(11) and conducting wire (16), the amplifier using input impedance megaohm or more high input impedance amplifier, the amplifier with
The optoacoustic probe, the signal acquiring system are separately connected.
6. the optoacoustic detection system according to claim 5 based on transparence optoacoustic probe, which is characterized in that the amplification
Device uses charge amplifier.
7. the optoacoustic detection system according to claim 5 based on transparence optoacoustic probe, which is characterized in that in the height
It installs conventionally used ultrasound or radio frequency amplifier between input impedance amplifier and the signal acquiring system additional, is further amplified
Signal carries out signal detection or imaging.
8. a kind of transparence focused ultrasonic sensor based on transparence ultrasonic transducer, which is characterized in that including described transparent
Change ultrasonic transducer (18) and transparence acoustic lens (10), the transparence acoustic lens (10) use transparence acrylic or
Resin makes, and adheres to the transparence ultrasonic transducer (18) on the transparence acoustic lens (10).
9. a kind of ball array photoacoustic tomography system based on transparence ultrasonic transducer, which is characterized in that including transparent
Change ultrasonic transducer ball type array, high input impedance amplifier, signal acquiring system, the transparence ultrasonic transducer ball-type battle array
Row include multiple transparence ultrasonic transducers (18) and transparent rack, and the transparence ultrasonic transducer (18) is mounted on described
On bright holder, the transparence ultrasonic transducer ball type array is connect with the high input impedance amplifier, the high input resistance
Anti- amplifier is connect with the signal acquiring system.
10. a kind of sound focusing optoacoustic endoscopy probe based on transparence ultrasonic transducer, which is characterized in that saturating including beam shaping
Mirror (14), transparence ultrasonic transducer (18), transparence acoustic lens (10), 45 degree of rotation light supersonic reflectoscopes (13), transparences
Shell (11), conducting wire (16), described transparence shell (11) one end are equipped with circular hole, 45 degree of rotation light supersonic reflectoscopes (13)
On one side by rotation axis it is interspersed in circular hole, the beam shaping lens (14), transparence ultrasonic transducer (18), transparence sound
Lens (10) are sequentially arranged at the other end of transparence shell (11), and the other end and the endoscope of the transparence shell (11) connect
It connects, the conducting wire (16) is drawn from the transparence shell (11), and the other end is equipped with plug.
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| CN201810515835.9A CN108703744A (en) | 2018-05-25 | 2018-05-25 | Transparence ultrasonic transducer and application |
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Application publication date: 20181026 |