KR20100068105A - Scanning probe - Google Patents

Abstract

PURPOSE: A scanning probe is provided to reduce power consumption by making vibration by the rigidity of a probe body and the magnetic force of a magnet and driving devices with little power. CONSTITUTION: A scanning probe comprises an electromagnet, and an optical fiber scanner(100). The electromagnet forms magnetic field. The optical fiber scanner obtains an external image while reciprocating, if magnetic force is applied to the inducing magnetic substance(200) attached to the body(110) by the magnetic field. The optical fiber scanner vibrates by the magnetic force and the rigidity of the body resisting to the magnetic force. The electromagnet is made of solenoid which generates the magnetic field if current is applied. The body is fixed to the fixed end(30) and is extended in one direction.

Description

Scanning Probe {SCANNING PROBE}

The present invention relates to a scanning probe, and more particularly, to a scanning probe for acquiring an external image using an optical fiber.

Recently, techniques for applying a principle of the Michelson interferometer have been developed to measure, in real time, a longitudinal tomographic image of a biological sample. The sample stage of such a system is usually composed of a bulk shape using galvano mirror and objective lens for the lateral scan of the sample sample, and researches to miniaturize the probe for application to imaging the inside of the human body with an endoscope. Is actively underway.

Conventionally, as a method for fabricating a small scanning probe, various driving systems such as micro motors, piezoelectric elements, CMOS-MEMS mirrors, MEMS motors, coils and permanent magnets for image scanning, and lens systems for obtaining clear images have been proposed. .

However, when the piezoelectric element is used, a high driving voltage is required, and when the micro motor or the CMOS-MEMS mirror is used, the manufacturing process is complicated and difficult. Also, it is a lens system for irradiating light to a sample or condensing the generated signal light. In case of using bulk type devices such as micro prism, reflector and lens in front of optical fiber, optical axis alignment between optical element and optical fiber Accuracy was required, and the more optical elements, the greater the optical loss.

In order to solve the above problems, the present invention is to provide an optical fiber scanning probe that is implemented through a simple process and can be driven using a low power. In addition, it is to provide an optical fiber scanning probe with a minimum optical loss by minimizing the optical elements required for the configuration.

In order to achieve the above object, the present invention provides an electromagnet for forming a magnetic field; And, when a magnetic force is applied to the metal attached to the body by the magnetic field, the optical fiber scanner for acquiring an external image while generating a vibration provides a scanning probe comprising a.

Here, the optical fiber scanner may be configured to vibrate by the magnetic force and the rigidity of the body to resist it.

At this time, the electromagnet is preferably composed of a solenoid to generate a magnetic field when a current is applied.

Specifically, the body is fixed to the fixed end and extends in one direction, the scan unit may be formed on the extending end of the body to be configured to acquire an external image while reciprocating a predetermined section during the vibration of the body.

In this case, the distance or frequency at which the scan unit reciprocates may be controlled according to the strength and driving frequency of the magnetic field.

In addition, the metal attached to the body may be installed to be replaced or changed position.

Thus, the distance or frequency at which the end of the optical fiber scanner reciprocates can be controlled according to the mass and position of the metal attached to the body.

On the other hand, it is preferable that an optical fiber core through which light propagates is formed inside the body, and the scan unit is integrally configured with an optical expansion optical fiber for expanding the light emitted from the optical fiber core and an optical fiber lens for condensing the light again. Do.

In this case, a viewing distance through which the optical fiber scanner can acquire an external image may be formed differently according to the diameter of the optical fiber core, the outer diameter and length of the optical fiber, or the curvature of the lens.

On the other hand, the optical fiber scanner is installed in parallel with the solenoid, is preferably configured to vibrate using a magnetic field formed at the end of the solenoid.

Alternatively, the electromagnet may include two solenoids, and each solenoid may be configured to form magnetic fields in different directions at positions where the metal is installed.

In this case, the optical fiber scanner can be driven two-dimensionally by the magnetic fields in different directions.

At this time, the two solenoids are preferably arranged so that each magnetic field is perpendicular to each other at the position where the metal is installed.

The two solenoids may be installed in parallel with the optical fiber scanner, and the optical fiber scanner may be configured to vibrate using a magnetic field formed at an end of each solenoid.

The case may further include a case for protecting the electromagnet and the optical fiber scanner, and the case may be made of a material having excellent impact resistance.

In addition, an object of the present invention is a scanning probe including an electromagnet to form a magnetic field and a fiber optic scanner to obtain an external image while the vibration occurs when a magnetic force is applied to the metal attached to the body by the magnetic field; It can also be achieved by means of a device.

Here, the scanner may be configured to vibrate by the strength of the metal in the magnetic field and its stiffness to resist it.

According to the present invention, the vibration is generated by the magnetic force of the electromagnet and the stiffness of the probe body, so that the devices can be driven with little power, thereby reducing power consumption.

In addition, when using the lens-integrated optical fiber according to the present invention, not only the manufacturing process is easy, but also the light loss is low, so that a clear external shape can be obtained.

Hereinafter, with reference to the accompanying drawings, a first preferred embodiment of the present invention will be described in detail.

1 is a schematic diagram showing an internal configuration of a scanning probe according to a first preferred embodiment of the present invention.

As shown in FIG. 1, the scanning probe according to the present invention includes an optical fiber scanner for acquiring an electromagnet and an external image.

When the current flows, the electromagnet 20 generates a magnetic field inside the scanning probe. In addition, when a current is applied to the electromagnet 20, a magnetic field is formed to provide a force capable of driving the optical fiber scanner 100.

In this embodiment, the solenoid 20 may be used as an example of the electromagnet. Of course, it is also possible to use an electromagnet other than the solenoid, but by using the solenoid 20 it is possible to configure a slim linear scanning probe.

The solenoid 20 may include a solenoid core 21 and a solenoid coil 22. Here, the solenoid core 21 is formed of a magnetic material having a high permeability, such as soft iron, and the solenoid coil 22 made of an insulated wire is wound around the solenoid core 21. When a current is applied to the solenoid coil 22, a magnetic field is formed around the solenoid 20 from the solenoid core 21. At this time, since the solenoid core 21 is made of soft iron having a high permeability, a strong magnetic field may be generated even when a small voltage and a current are applied to the solenoid coil 22.

On the other hand, the optical fiber scanner 100 is installed adjacent to the solenoid 20. In addition, the light guide unit 110 may include a body 110 through which light travels and a light collecting part 120 for acquiring an external image.

The body 110 of the optical fiber scanner 100 is made of a linear optical fiber having a predetermined length. In addition, an optical fiber core 111 is formed inside the body 110 to form a path through which light travels. In addition, the optical fiber core 111 may be surrounded by a cladding 112 having a predetermined rigidity and may be protected from an external impact.

And, as shown in Figure 1 one end of the body 110 may be installed in a shape that is fixed to the fixed end 30 extending in one direction. In addition, an inductive magnetic material may be provided at an outer portion of the body 110. The inductive magnetic material 200 refers to a material in which a magnetic force is formed when placed in a magnetic field. Therefore, when a current is applied to the solenoid 20 to generate a magnetic field, the bending force is applied to the optical fiber scanner 100 while a magnetic force is applied to the inductive magnetic material 200 by the magnetic field. In this case, when the optical fiber scanner 100 is bent in elasticity by the bending moment, the body 110 may exhibit a cantilever beam behavior in which vibration is continuously generated by a force that is to be restored to its original shape by its rigidity. have. The driving of the optical fiber scanner 100 will be described in more detail below.

On the other hand, the light collecting part 120 is formed at the end of the direction in which the body 110 extends. In addition, when the body 110 vibrates by a magnetic force, an external image may be acquired while reciprocating a predetermined section.

As shown in FIG. 1, the light collecting part 120 may be formed of a lens-integrated configuration, rather than a plurality of optical elements. Therefore, since the optical loss is less than when the plurality of optical elements are provided separately, a high resolution image can be obtained.

Specifically, the optical expansion optical fiber 121, which is provided as a coreless silica fiber (CSF) at the end of the optical fiber body 110 is melt-bonded, and the arc discharge at the end of the optical expansion optical fiber 121 An integrated lens 122 may be formed using the back or the like. Therefore, when the light traveling along the optical fiber core 111 reaches the condenser 120, the light is extended by the optical expansion fiber 121 without the core, and the beam extended in the predetermined section is applied to the lens 122. Can be collected by. In this case, an operating characteristic such as a viewing distance of the optical fiber scanner 100 may be changed according to the diameter of the optical fiber core 111, the outer diameter or length of the optical extension fiber 121, and the curvature of the lens 122.

이고, 상기 금속(200)이 부착된 위치로부터 상기 광섬유 스캐너(100)의 단부까지의 거리가

인 경우 상기 광섬유 스캐너(100)의 휨 거동 특성에 대하여 설명하도록 한다.2 is an explanatory diagram showing a displacement generated in the optical fiber scanner 100 when a magnetic field is applied. Hereinafter, referring to FIG. 2, the distance from the fixed end 30 of the optical fiber scanner 100 to the position where the metal 200 is attached is

And the distance from the position where the metal 200 is attached to the end of the optical fiber scanner 100

In the case of the bending behavior of the optical fiber scanner 100 will be described.

In this embodiment, as shown in FIG. 2, a metal may be used as the inductive magnetic material 200, and may be attached to a predetermined position of the body 110 of the optical fiber scanner 100. However, it is also possible to use other materials other than metal as an example, it may be configured in the form of coating a predetermined section of the outer portion of the body 110, not the attachment method.

The optical fiber scanner 100 represents the behavior of the cantilever beam forcibly vibrating using the force of the metal 200 attached to the body 110 by the magnetic field and its own rigidity. That is, the optical fiber scanner 100 is configured in the form of a cantilever having a natural frequency of a predetermined value, and when the magnetic field is applied, the optical fiber scanner 100 may perform a movement to reciprocate a predetermined distance. Therefore, a key parameter in the behavior of the optical fiber scanner 100 can be seen as the magnitude and the resonance frequency of the vertical displacement of the end of the optical fiber scanner 100 corresponding to the scan distance.

이고, 면적모멘트가

인 단면을 갖도록 구성된다고 가정한다. 그리고, 상기 고정단(30)에 고정 설치되는 지점을 원점으로 수평 거리를

, 수직 거리를

로 하는 좌표계에서 고정단(30)으로부터

만큼 떨어져 위치한 금속(200)에

크기의 자기력이 가해지는 경우,

지점에서 광섬유 스캐너(100)에 걸리는 휨 모멘트(

)는 아래와 같이 기술될 수 있다. Specifically analyzing the Young's Modulus of the optical fiber scanner body 110

The area moment is

Assume that it is configured to have a cross section of. Then, the horizontal distance from the point fixed to the fixed end 30 to the origin

, Vertical distance

From the fixed end 30 in the coordinate system

As far apart as metal (200)

When magnetic force of magnitude is applied,

Bending moment applied to the optical fiber scanner 100 at the

) May be described as follows.

(1)

(One)

(2)

(2)

(3)

(3)

)에 걸리는 휨 모멘트(

)를 상이한 관점에서 기술한 식이다.Equations (1) and (2) represent any horizontal position (

Bending moment ()

) Is an equation described from different viewpoints.

)과 몸체(110)의 영률(

) 및 면적모멘트(

)를 이용하여 기술하였다. 여기서, 광섬유 스너(100)의 곡률은

의 2차미분형태(

)으로 나타낼 수 있다.In Equation (1), the curvature at the time when the optical fiber scanner 100 is bent under magnetic force (

) And the Young's modulus of the body 110

) And area moment (

) Is described. Here, the curvature of the optical fiber snub 100

Second derivative of

)

만큼 떨어진 위치로

만큼의 힘이 가해지는 경우, 임의의 수평거리

에 발생되는 휨모멘트(

)의 크기이다. 따라서, 식 (1) 및 식 (2)로부터 식 (3)이 유도될 수 있고, 식 (3)을

에 대하여 적분하면 아래의 결과를 얻을 수 있다.On the other hand, equation (2) is from the fixed end (30)

Away

Any horizontal distance

Bending moment generated in

) Is the size. Thus, equation (3) can be derived from equations (1) and (2), and

Integrating with gives the following results:

(4)

(4)

는 광섬유 스캐너(100)의 휨 각도(

)를 의미한다. 이때,

인 고정단(30)에서는 휨각도(

)가 0이므로,

=0에 의해

=0임을 알 수 있다. 그리고, 금속(200)이 위치한 지점(

)에서의 휨각도(

)는 아래와 같이 표현될 수 있다.here,

Is the bending angle of the optical fiber scanner 100

). At this time,

In the fixed end 30, the bending angle (

) Is 0,

By 0

It can be seen that = 0. And, the point where the metal 200 is located (

Bending angle in

) Can be expressed as

(5)

(5)

에 관하여 한 번 더 적분하는 경우 아래와 같은 결과를 얻을 수 있다.Meanwhile, equation (4)

If we integrate once more for, we get

(6)

(6)

),

=0임을 얻을 수 있다. 따라서, 금속(200)이 위치한 지점(

)에서의 수직 방향의 변위

는 아래와 같이 기술될 수 있다.Using the positional conditions of the fixed end 30

),

It can be obtained that 0. Thus, the point where the metal 200 is located (

Displacement in the vertical direction

Can be described as follows.

(7)

(7)

까지는 휨 거동에 의해 소정 곡률로 변위가 발생하고, 금속(200)이 부착된 위치 이후로부터는

지점의 휨각도에 대응되도록 선형으로 변위가 증가함을 알 수 있다. 이 때,

에 해당하고, 상기 식 (5) 및 식 (7)을 이용하면, 도 2에서의 광섬유 스캐너(100)의 단부에서 발생되는 변위는 아래와 같이 기술될 수 있다.Therefore, magnetic force is generated

Until the displacement occurs by a predetermined curvature due to the bending behavior, and after the position where the metal 200 is attached

It can be seen that the displacement increases linearly to correspond to the bending angle of the point. At this time,

Corresponding to and using the equations (5) and (7), the displacement generated at the end of the optical fiber scanner 100 in Fig. 2 can be described as follows.

(8)

(8)

의 훅의 법칙을 적용하면, 광섬유 스캐너(100)의 수직 방향 탄성 계수는 아래와 같이 결정될 수 있다.Next, in order to find the modulus of elasticity,

By applying Hook's law, the vertical elastic modulus of the optical fiber scanner 100 may be determined as follows.

(9)

(9)

는 광섬유 스캐너(100)의 수직 방향 탄성 계수에 해당하며,

는

지점에서의 광섬유 스캐너(100)의 등가질량(equivalent mass)에 해당한다.In addition, the resonance frequency of the optical fiber scanner 100 can be expressed as follows using Equation (9). here,

Corresponds to the vertical elastic modulus of the optical fiber scanner 100,

Is

It corresponds to the equivalent mass of the optical fiber scanner 100 at the point.

(10)

10

Examining the above Equations (8) and (10), it can be seen that the behavior of the optical fiber scanner 100 according to the present invention may vary depending on the metal 200 attached to the body. From Equation (8), it can be seen that the scan distance at which the optical fiber scanner 100 performs the reciprocating motion depends on the position at which the metal 200 is attached to the body. In addition, it can be seen from Equation (10) that the resonance frequency of the optical fiber scanner 100 depends on the position of the metal 200 attached to the body 110 and the mass of the metal 200. Therefore, by adjusting the position and mass of the metal 200, it is possible to set different behavior characteristics of the optical fiber scanner 100.

Although the relationship between the behavior characteristics of the optical fiber scanner 100 and the metal 200 has been described above, the behavior of the optical fiber scanner 100 may vary depending on the strength of the magnetic force. Therefore, by controlling the magnitude of the current or voltage applied to the solenoid coil 22, it is possible to control the behavior characteristics of the optical fiber scanner 100, that is, the scan distance.

3 shows a manufacturing process of a scanning probe according to a preferred embodiment of the present invention. Hereinafter, a manufacturing process of the scanning probe of this embodiment will be described with reference to FIG. 3.

3A illustrates a solenoid core 21 used in the solenoid 20. Here, the solenoid core 21 may use soft iron, and the soft iron preferably has a high permeability and a low coercivity so as to have characteristics suitable for the iron core of the AC device with a small hysteresis loss.

As shown in FIG. 3B, the solenoid 20 may be completed by winding the solenoid coil 22, which is an insulated wire, on the outside of the solenoid core 21.

FIG. 3C illustrates a process of manufacturing the scan unit 120 of the optical fiber scanner. As shown in (c) of FIG. 3, the optical expansion section 121 may be configured by cutting the optical fiber including the optical fiber core 111 and melting-bonding the coreless silica fiber (CSF) to the end thereof. . In addition, it is possible to integrally form the lens 122 having a desired curvature by applying an arc discharge having a predetermined pulse intensity and emission time to the end of the light extension section 121. In this step, it is preferable to set the diameter of the optical fiber core 111, the outer diameter and the length of the optical expansion optical fiber 121, and the curvature of the lens 122 in consideration of the viewing distance of the optical fiber scanner 100.

In FIG. 3D, a step of installing the optical fiber scanner 100 may be performed. As described above, the optical fiber scanner 100 may be formed such that one end thereof is fixed to the fixed end 30 and extends in one direction. In this case, the fixed end 30 may be fixed to the solenoid 20 or may be installed to be fixed to the case 10 of the scanning probe.

At this time, the optical fiber scanner 100 is preferably installed in parallel with the solenoid 20. The scanning probe according to the present invention is used to acquire an image of a narrow area such as the inside of a human body, and the optical fiber scanner 100 and the solenoid 20 may be formed side by side to form a slim scanning probe.

On the other hand, the body of the optical fiber scanner 100 may be attached to the metal 200 to receive a magnetic force from the magnetic field. In this case, as described above, the mass and the attachment position may be determined in consideration of the scan distance and the natural frequency of the optical fiber scanner 100. In addition, the metal 200 may be detachably installed on the body 110 of the optical fiber scanner 100 to change the position or mass of the metal 200 if necessary.

Here, the magnetic force line formed by the solenoid 20 is bent after exiting one end of the solenoid 20, as shown in (d) of FIG. 3 and proceeds in the longitudinal direction of the solenoid 20 to enter the other end. Follow. However, the metal 200 may vibrate the optical fiber scanner 100 using magnetic force when a magnetic force line including a component in a vertical direction with the optical fiber scanner 100 passes. Therefore, the optical fiber scanner 100 is installed side by side with the solenoid, the position where the metal 200 is attached is preferably configured to be adjacent to the end of the solenoid 20, the magnetic force lines in the vertical direction and the optical fiber scanner 100 is distributed a lot. Do.

FIG. 3E shows a cross section of the finally completed scanning probe. The solenoid 20 and the optical fiber scanner 100 may be inserted into the case 10 and protected. In this case, the case 10 may be configured using a shock absorbing material having excellent impact resistance, and in this embodiment, polycarbonate ester may be used. The end of the case in which the scan unit 120 of the optical fiber scanner 100 is formed may have a window 11 formed of a transparent member to observe the behavior of the optical fiber scanner when an external image is acquired.

The scanning probe configured as described above has an advantage in that the manufacturing process is easy using a lens-integrated optical fiber, and can be driven at low power by using the property of soft iron. At this time, the reciprocating scan speed, the reciprocating scan distance and the viewing distance of the scanning probe are the diameter of the solenoid 20, the cross-sectional area and the number of turns of the solenoid coil 22, the permeability and coercivity of the solenoid core 21, the length of the optical fiber scanner 100 The amount and position of the metal 200 attached to the optical fiber scanner body 110 and the strength and frequency of the alternating current applied to the solenoid coil 22 may be adjusted.

Hereinafter, the results of performance experiments on the scanning probes manufactured as described above will be described with reference to FIGS. 4 to 9.

4 illustrates an operation of scanning by using the scanning probe according to the present embodiment. When a laser beam having a wavelength of 638 nm is incident on the scanning probe, the optical fiber scanner 100 performs scanning while reciprocating a section of about 4 mm.

5 illustrates a result of measuring a viewing distance of the scanning probe according to the present embodiment. This is a characteristic of the scanning unit 120 of the optical fiber scanner 100, and when the light emitted from the scanning unit 120 can be returned to the scanning unit 120, the planar reflector in front of the scanning unit 120 Was installed. The intensity of the light re-condensed by the scan unit 120 is measured by using a power meter while changing the distance between the scan unit 120 and the reflector.

As a result, as shown in FIG. 5, it can be seen that the viewing distance at which the maximum light intensity is re-condensed is about 1.2 mm. This shows that the conventional scanning probe has a field of view of several hundreds of micrometers, and thus the field of view has been greatly improved compared to that required for super close-up photography.

6 shows the result of measuring the side resolution of the scanning probe according to the present embodiment. The resolution of the side surface of the scanning probe may be determined using the size of light projected to the outside. Therefore, in this experiment, while passing the scanning probe to the boundary portion of the planar reflector, the intensity of the re-condensed light was measured.

Here, the portion where the light intensity is constant corresponds to a case where all the light emitted from the scan unit 120 is irradiated with the plane reflector (when the light intensity is 1) or out of the plane reflector (when the light intensity is 0). In addition, the section in which the light intensity changes is a section in which the light intensity of the scanning probe is gradually reduced while passing through the boundary of the reflector, and the length of the section corresponds to the diameter of the light. In this experiment, the distance of the light intensity drop from 80% of maximum to 20% is defined as the effective diameter of light, and it can be seen that it has a side resolution of 14mm.

7 shows a change in scan distance according to the driving frequency of the scanning probe according to the present embodiment. As described above, the scanning probe according to the present invention has a resonance frequency, and has an advantage of obtaining a maximum scan distance with minimum power consumption at the resonance frequency. According to the present embodiment, as a result of measuring the scan distance for each driving frequency, a maximum scan distance of 4 mm can be measured at 30 Hz, which is a resonance frequency.

FIG. 8 is a schematic diagram of an optical tomography imaging system of a spectral region, which is one of optical imaging systems using a scanning probe according to the present invention. Referring to FIG. 8, the optical tomography imaging system includes a light source unit 801, a reference stage 803, a sample stage 804, and a detection stage 806, each of which is centered on an optical fiber optical splitter 802. Can be connected.

The image measurement process is as follows. The broadband light source for the optical tomography image and the visible light laser for the visualization of the scan area constitute the light source unit 801, and the two light sources are provided by the light splitter 802 to the reference stage 803 and the sample stage 804, respectively. To be distributed. Each distributed beam is reflected and scattered by the mirror of the reference stage and the sample 805 to be measured at the sample stage and then recombined by the optical splitter 802 to cause interference in the light receiver 806. The interference signals of the two beams are sent to the signal processor 807 through a spectral spectrometer consisting of a diffraction grating, a lens, and a CCD for signal analysis in the spectral region, and then reconstructed into two-dimensional or three-dimensional images through a predetermined signal processing process. Can be.

9 is an image obtained from the optical tomography system of FIG. 9 (a) is a pearl, FIG. 9 (b) is a finger, and FIG. 9 (c) is a tomographic image of the abdomen of the tadpole. As described above, when the scanning probe of the present invention is used, it is possible to acquire external image information at high resolution.

Hereinafter, a scanning probe according to a second embodiment and a third embodiment of the present invention will be described. However, the same reference numerals are used for the same elements as in the above-described embodiment, and the corresponding description will be omitted to avoid duplication.

10 is an internal perspective view showing the inside of a scanning probe according to a second embodiment of the present invention. In the above-described embodiment, the scanning probe is configured using one solenoid 20. However, in the present embodiment, the scanning probe may be configured using the two solenoids 20.

In the above-described embodiment, since the metal 200 of the optical fiber scanner 100 is placed on a single magnetic field and subjected to a force, it could not be performed except for a reciprocating motion in one direction. In contrast, in the present embodiment, magnetic fields in different directions are applied to the metal 200 by the two solenoids 20. That is, while the magnetic force in different directions generated by the two magnetic fields act on the metal 200, the optical fiber scanner 100 is driven by the force of the two forces. Therefore, it is possible to drive the optical fiber scanner 100 in two dimensions by adjusting the strengths of the two magnetic fields.

In this case, like the above-described embodiment, the two solenoids 20 and the optical fiber scanner 100 are preferably installed in parallel to form a slim scanning probe. In addition, the metal 200 is located adjacent to the end of each solenoid 20, it is preferable to drive using a magnetic field formed in the direction bent at the end of each solenoid 20.

At this time, as shown in Figure 10, each solenoid 20 is preferably installed in parallel with the optical fiber scanner 100, it is arranged to form a magnetic field in the vertical direction with the metal 200. When magnetic fields of the same magnitude are formed in the mutually perpendicular directions by each solenoid 20, the current or voltage applied to each solenoid 20 is controlled to drive the optical fiber scanner 100 in all directions. It is possible.

11 illustrates the inside of a scanning probe according to a third embodiment of the present invention. In the above-described embodiment, the metal is attached to a predetermined portion of the optical fiber scanner 100 so as to receive a magnetic force during driving, and the magnetic force is intensively applied to the portion, but in this embodiment, the inductive magnetism is applied to all or some sections of the body 110. After coating the inductive magnetic material 200 may have a coating, the magnetic field is formed in a section coated with the inductive magnetic material 200, and may be configured to vibrate while generating a magnetic force in the section.

As shown in FIG. 11, in this embodiment, the inductive magnetic material 200 of the optical fiber scanner body 100 is disposed between the adjacent ends by using two solenoids 20 arranged side by side with the ends facing each other. This coated section can be located.

In this case, unlike the above-described embodiment, the portion in which the magnetic force is generated by the magnetic field forms a predetermined section, and it is preferable to use a magnetic field formed in the longitudinal direction of the solenoid 20 along the cross section of the solenoid core 21. Do.

In addition, although two solenoids 20 are used in the present embodiment, the present invention is not limited thereto, and one or three or more solenoids 20 may be used to control the strength of the magnetic field.

Meanwhile, according to the present embodiment, each of the solenoids 20 may be discontinuously supplied with current to selectively form a magnetic field. In addition, each of the solenoids 20 is preferably a current is applied to the body of the optical fiber scanner 100 to generate magnetic forces in different directions. Accordingly, each of the solenoids 20 alternately form a magnetic field, and at this time, the current is preferably applied to each solenoid 20 alternately corresponding to the vibration period of the optical fiber scanner 100.

As described above, the present invention can be manufactured by a simple manufacturing process to provide a scanning probe driven at a low voltage. The present invention can be widely used as a configuration for acquiring images in various devices capable of acquiring images of medical devices such as endoscopes and other narrow locations.

1 is a schematic diagram showing an internal configuration of a scanning probe according to a first preferred embodiment of the present invention,

2 is an explanatory diagram showing a displacement generated in the optical fiber scanner of FIG. 1,

3 shows a manufacturing process of the scanning probe according to the first embodiment,

4 illustrates a scanning process using the scanning probe according to the first embodiment,

5 illustrates a result of measuring a viewing distance of the scanning probe according to the first embodiment,

6 illustrates a result of measuring side resolution of a scanning probe according to a first embodiment,

7 illustrates a change in scan distance according to a driving frequency of the scanning probe according to the first embodiment,

FIG. 8 schematically illustrates an optical tomography system using a scanning probe according to a first embodiment.

9 is an image obtained from the optical tomography system of FIG.

10 is an internal perspective view showing the inside of a scanning probe according to a second embodiment of the present invention.

11 is an internal perspective view showing the inside of a scanning probe according to a third embodiment of the present invention.

Claims (21)

An electromagnet forming a magnetic field; And, And an optical fiber scanner that acquires an external image while performing a series of reciprocating motions when a magnetic force is applied to an inductive magnetic material attached to the body by the magnetic field. The method of claim 1, And the optical fiber scanner vibrates by the magnetic force and the rigidity of the body that resists the magnetic force. The method of claim 2, The electromagnet is a scanning probe, characterized in that consisting of a solenoid for generating a magnetic field when a current is applied. The method according to claim 2 or 3, The body is fixed to the fixed end is extended to one side, the scanning unit is formed on the extending end of the body scanning probe, characterized in that to obtain an external image while reciprocating a predetermined section during the vibration of the body. The method of claim 4, wherein The distance that the scan unit reciprocates is controlled according to the strength of the magnetic field. The method of claim 4, wherein Scanning probe, characterized in that the inductive magnetic material attached to the body is made of a metal that is installed to be replaced or changed position. The method of claim 6, The distance that the end of the optical fiber scanner is reciprocating can be controlled according to the mass of the metal attached to the body and the position where the metal is attached. The method of claim 6, The inherent resonance frequency of the optical fiber scanner can be controlled according to the mass of the metal and the position to which the metal is attached. The method of claim 4, wherein An optical fiber core through which light propagates is formed inside the body, and the scanning unit is integrally formed with an optical expansion fiber for expanding the light emitted from the optical fiber core and a lens for condensing the light. Probe. 10. The method of claim 9, And a viewing distance through which the optical fiber scanner can acquire an external image is controlled according to the diameter of the optical fiber core, the outer diameter and length of the optical fiber, or the curvature of the lens. The method of claim 3, The optical fiber scanner is installed in parallel with the solenoid, scanning probe characterized in that the oscillation using a magnetic field formed at the end of the solenoid. The method of claim 3, The electromagnet comprises two solenoids, each of the solenoids to form a magnetic field in a different direction at the position where the inductive magnetic material is installed. The method of claim 12, And the optical fiber scanner is driven two-dimensionally by magnetic fields in different directions. The method of claim 12, And the two solenoids are arranged such that each magnetic field is orthogonal to each other at a position where the metal is installed. The method of claim 12, And the two solenoids are installed in parallel with the optical fiber scanner, and the optical fiber scanner vibrates using a magnetic field formed at an end of each solenoid. The method of claim 2, The inductive magnetic material is a scanning probe, characterized in that the coating treatment for a predetermined portion to the outside of the body of the optical fiber scanner. The method of claim 16, The electromagnet is composed of two solenoids, each end of which is facing each other, the body is installed so that the coated inductive material is located between the two solenoids by using a magnetic field formed at each solenoid and the end Scanning probe, characterized in that vibrating. 18. The method of claim 17, And the two solenoids alternately apply an electric current to correspond to the vibration period of the optical fiber probe to form an electric field. The method of claim 4, wherein And a case for protecting the electromagnet and the optical fiber scanner, wherein the case is made of a material having excellent impact resistance. And a scanning probe including an electromagnet forming a magnetic field and a fiber optic scanner to obtain an external image while vibration is generated when a magnetic force is applied to the metal attached to the body by the magnetic field. 21. The method of claim 20, The scanner is a medical device, characterized in that for scanning by vibrating the metal due to the force received from the magnetic field and its stiffness.

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