An OCT scanning probe driven by a motor and a MEMS micro-mirror in cooperation

Abstract

The application discloses an OCT scanning probe driven by a motor and a MEMS micromirror, and relates to the technical field of medical devices.The OCT scanning probe comprises a shell, a MEMS micromirror and a driving module.An incident light beam is transmitted to the MEMS micromirror for reflection, and the reflected light beam is irradiated to a target imaging area through an annular light exit window, is reflected by the target imaging area, returns along the original light path, and is received for processing.The MEMS micromirror and the driving module cooperatively perform axial scanning and annular scanning, the scanning path of the incident light beam on the target imaging area is moved after being reflected by the MEMS micromirror, and annular band scanning imaging of the target imaging area in the annular direction and the axial direction is realized.The OCT scanning probe can realize accurate point annular scanning of a cavity sidewall and three-dimensional depth information acquisition, has high resolution and high scanning speed, effectively suppresses physiological motion artifacts, is suitable for complex intracavity environments, and provides a reliable imaging tool for accurate diagnosis of early lesions in a cavity.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to an OCT scanning probe driven by a motor and a MEMS micromirror. Background Technology

[0002] Endoscopic imaging technology, as a key medical tool for obtaining information about the internal structure of human cavities, has been widely used in the early diagnosis of lesions in the digestive, respiratory, and urinary tracts, providing important support for clinical disease screening and assessment. In the clinical diagnosis and treatment of these cavities, lesions often originate from the mucosal walls and frequently exhibit diffuse and invasive growth characteristics. However, traditional optical or electronic endoscopic imaging techniques can only capture the morphological information of the surface layer of the mucosa, making it difficult to accurately detect the depth and extent of lesion infiltration in the submucosal layer. This limits the accuracy of early diagnosis and consequently affects the precise planning and implementation of treatment plans.

[0003] Therefore, the clinical field urgently needs a three-dimensional imaging technology capable of circumferential scanning of the lateral walls of cavities. The core requirements focus on four aspects: first, precise pinpoint circumferential scanning capability for accurate scanning of suspicious lesion areas; second, acquisition of three-dimensional depth information to clarify the lesion's infiltration layers; third, high-resolution imaging to clearly identify minute lesions; and fourth, high scanning speed to effectively suppress motion artifacts caused by physiological movement. Optical coherence tomography (OCT) technology, with its advantages of high resolution and deep penetration, has become an important technical choice for intracavitary three-dimensional imaging. However, current OCT probes used for intracavitary circular scanning face limitations in their application for precise clinical diagnosis due to limitations in their technical design.

[0004] The main technical approaches for implementing intracavitary annular scanning OCT probes can be categorized into the following three types, as detailed below.

[0005] Firstly, there is the external mechanical drive scheme. This scheme uses an external motor to drive the distal probe to rotate via a long torque transmission shaft to achieve circular scanning. However, due to the long transmission path and high frictional losses, the probe rotation uniformity is poor, the response delay is significant, and it is difficult to accurately control the start, stop, and speed of the scan. In clinical applications, when encountering cavities with bends or physiological movements of the human body, severe motion artifacts and image distortion are easily generated, and it is impossible to achieve stable fixed-point dwell scanning at specific angles, which greatly affects the accuracy of lesion detection.

[0006] Secondly, the internal micro-motor drive scheme. This scheme places the micro-motor inside the probe, directly driving the reflector to rotate, and then combines this with the overall axial retraction of the probe to achieve three-dimensional imaging. Although this scheme shortens the transmission chain, it is still limited by the mechanical inertia of the micro-motor: a single rotation can only acquire a single circumference, making it impossible to form continuous circumferential imaging; the imaging rate and axial resolution are constrained by the motor speed. Furthermore, during long-distance axial retraction, it is difficult to ensure the stability of the rotation axis, which can easily lead to circumferential displacement and image distortion. At the same time, its mechanical characteristics cannot meet the clinical needs of local fixation of lesion sites and fixed-point two-dimensional scanning.

[0007] Thirdly, there are scanning schemes based on single MEMS micromirrors. Existing scanning schemes of this type typically have limited scanning range, only capable of scanning local rectangular areas, making it difficult to achieve a complete 360° circular scan. Attempts to extend the scanning range through complex optical path designs or MEMS array arrangements, while expanding the coverage area to some extent, significantly increase system structural complexity, control logic difficulty, and overall power consumption. This not only increases the research and manufacturing costs of the probe but also hinders its miniaturization, making it difficult to adapt to the slender, narrow cavities of the human body, thus limiting its clinical application.

[0008] The aforementioned existing technical solutions all suffer from core bottlenecks such as insufficient scanning accuracy, poor stability, slow response speed, and limited flexibility, and cannot fully meet the clinical needs for accurate identification and quantitative analysis of early lesions in cavities. Summary of the Invention

[0009] The purpose of this invention is to provide an OCT scanning probe driven by a motor and a MEMS micromirror to solve the problems existing in the prior art. It can achieve precise fixed-point circumferential scanning and three-dimensional depth information acquisition of the cavity sidewall, while taking into account high resolution and high scanning speed. It can effectively suppress physiological motion artifacts, adapt to complex intracavitary environments, and provide a reliable imaging tool for the accurate diagnosis of early intracavitary lesions.

[0010] To achieve the above objectives, the present invention provides the following solution: This invention provides an OCT scanning probe driven by a motor and a MEMS micromirror, comprising a housing with a cavity, a MEMS micromirror, and a driving module both placed within the cavity; the front end of the MEMS micromirror is connected to the driving module within the cavity, and the driving module is connected to the inner wall of the housing; the peripheral wall of the front end of the housing has an annular light-emitting window; an incident light beam can pass into the cavity, the incident light beam is transmitted to the MEMS micromirror for reflection, the reflected light beam illuminates the target imaging area through the annular light-emitting window, and the incident light beam returns along the original optical path after being reflected by the target imaging area and is received and processed; the driving module can drive the MEMS micromirror to rotate circumferentially for circumferential scanning; and the MEMS micromirror can also perform axial scanning under external driving or the driving module; after the incident light beam is reflected by the MEMS micromirror, the scanning path on the target imaging area moves, so as to realize annular scanning imaging of the target imaging area in both the circumferential and axial directions.

[0011] Preferably, the driving module includes a first rotary motor, a vibration motor, and an elastic element arranged sequentially along the axial direction. The first rotary motor is fixedly connected to the inner wall of the housing, and the driving end of the first rotary motor is fixedly connected to the vibration motor. The driving end of the vibration motor is connected to the MEMS micromirror through the elastic element. The first rotary motor can drive the vibration motor, the elastic element, and the MEMS micromirror to rotate circumferentially, so as to realize the circumferential scanning of the MEMS micromirror. The vibration motor can drive the elastic element and the MEMS micromirror to vibrate synchronously along the axial direction to form resonance, and the mirror surface of the MEMS micromirror can be deflected, so as to realize the axial scanning of the MEMS micromirror.

[0012] Preferably, the driving module includes a second rotary motor, which is fixedly connected to the inner wall of the housing, and the driving end of the second rotary motor is connected to the MEMS micromirror. The second rotary motor can drive the MEMS micromirror to rotate circumferentially, so as to realize the circumferential scanning of the MEMS micromirror. The MEMS micromirror can be electrically connected to an external power source and can at least perform axial scanning.

[0013] Preferably, it further includes a focusing lens and a ceramic ferrule coaxially disposed within the accommodating cavity. The focusing lens is disposed between the ceramic ferrule and the MEMS micromirror. The ceramic ferrule is used to coaxially fix the optical fiber, and the focusing lens is used to focus the incident light beam.

[0014] Preferably, the accommodating cavity is further provided with a wire groove that communicates with the outside world, and the wire groove is used to accommodate electrical connection wires to the driving module and / or the MEMS micromirror.

[0015] Preferably, the annular light-emitting window is sealed to the housing.

[0016] Preferably, the housing includes two sub-shells distributed axially on both sides of the annular light-emitting window, and the two sub-shells can be sealed to the periphery of the annular light-emitting window.

[0017] Preferably, the material of the annular light-emitting window is set to a light-transmitting material.

[0018] Preferably, the shell material is a medical-grade material.

[0019] The present invention achieves the following technical effects compared to the prior art: The OCT scanning probe provided by this invention, driven by a motor and a MEMS micromirror, transmits an incident light beam to the MEMS micromirror for reflection. The reflected beam then illuminates the target imaging area through a ring-shaped light-emitting window. After reflection by the target imaging area, the incident light beam returns along the original optical path and is received and processed for subsequent imaging. The MEMS micromirror, housed within the housing, works in conjunction with the driving module to achieve precise circumferential rotation and axial displacement. This allows the MEMS micromirror to perform circumferential and axial scanning of the target imaging area, avoiding errors and delays caused by long-distance mechanical transmission. This improves the stability and accuracy of the scanning process, enabling precise fixed-point circumferential scanning of cavity sidewalls and acquisition of three-dimensional depth information. It balances high resolution and high scanning speed, effectively suppresses physiological motion artifacts, and is adaptable to complex intracavitary environments, providing a reliable imaging tool for the accurate diagnosis of early intracavitary lesions. Furthermore, the integrated design within the housing ensures high imaging resolution while miniaturizing the probe, making it suitable for complex and narrow human cavities such as the digestive and respiratory tracts. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 An internal schematic diagram of the OCT scanning probe driven by a motor and a MEMS micromirror provided by the present invention; Figure 2 A schematic diagram of the driving module for Mode 1 provided by the present invention; Figure 3 for Figure 2 A schematic diagram of the mirror deflection scanning range of the MEMS micromirror under the provided driving module; Figure 4 for Figure 2A schematic diagram of the annular scanning range of the MEMS micromirror under the provided driving module; Figure 5 A schematic diagram of the driving module for Mode 2 provided by the present invention; Figure 6 for Figure 5 A schematic diagram of the mirror scanning range of the MEMS micromirror under external driving action using the provided driving module; Figure 7 for Figure 5 A schematic diagram of the annular scanning range of the MEMS micromirror under the provided driving module.

[0022] In the figure: 1-Housing; 11-Cavity; 2-MEMS micromirror; 3-Drive module; 31-First rotary motor; 32-Vibration motor; 33-Elastic element; 34-Second rotary motor; 35-Connector; 4-Annular light-emitting window; 5-Focusing lens; 6-Ceramic ferrule; 7-Wire groove; 8-Electrical connection wire; 9-Fiber optic cable; 10-Scanning area. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] The purpose of this invention is to provide an OCT scanning probe driven by a motor and a MEMS micromirror to solve the problems existing in the prior art. It can achieve precise fixed-point circumferential scanning and three-dimensional depth information acquisition of the cavity sidewall, while taking into account high resolution and high scanning speed. It can effectively suppress physiological motion artifacts, adapt to complex intracavitary environments, and provide a reliable imaging tool for the accurate diagnosis of early intracavitary lesions.

[0025] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] This invention provides an OCT scanning probe driven by a motor and a MEMS micromirror in a coordinated manner. Please refer to [link to relevant documentation]. Figures 1-7The system includes a housing 1 with a accommodating cavity 11, a MEMS micromirror 2 and a driving module 3 both placed within the accommodating cavity 11; the front end of the MEMS micromirror 2 is connected to the driving module 3 within the accommodating cavity 11, and the driving module 3 is connected to the inner wall of the housing 1; the front peripheral wall of the housing 1 has an annular light-emitting window 4; an incident light beam can pass into the accommodating cavity 11, the incident light beam is transmitted to the MEMS micromirror 2 for reflection, the reflected light beam illuminates the target imaging area through the annular light-emitting window 4, the incident light beam returns along the original optical path after being reflected by the target imaging area and is received and processed; the driving module 3 can drive the MEMS micromirror 2 to rotate circumferentially for circumferential scanning; and the MEMS micromirror 2 can also perform axial scanning under external driving or driving by the driving module 3; after the incident light beam is reflected by the MEMS micromirror 2, the scanning path on the target imaging area moves, so as to realize annular scanning imaging of the target imaging area in both the circumferential and axial directions.

[0027] The MEMS micromirror 2, housed within the housing 1, works in conjunction with the drive module 3 to precisely rotate circumferentially and displace axially. This allows the MEMS micromirror 2 to perform circumferential and axial scanning of the target imaging area, avoiding errors and delays caused by long-distance mechanical transmission. This improves the stability and accuracy of the scanning process, enabling precise pinpoint circumferential scanning of the cavity sidewalls and acquisition of three-dimensional depth information. It balances high resolution and high scanning speed, effectively suppresses physiological motion artifacts, and is adaptable to complex intracavitary environments, providing a reliable imaging tool for the accurate diagnosis of early intracavitary lesions. Furthermore, the integrated design within the housing 1 ensures high imaging resolution while miniaturizing the probe, making it suitable for complex and narrow human cavities such as the digestive and respiratory tracts. In practical applications, the circumferential drive amplitude of the drive module 3 can be controlled to coordinate with the MEMS micromirror 2 for local circumferential scanning of the scanning area.

[0028] More preferably, the OCT scanning probe driven by the motor and MEMS micromirror provided by the present invention further includes a focusing lens 5 and a ceramic ferrule 6 coaxially disposed in the accommodating cavity 11. The focusing lens 5 is disposed between the ceramic ferrule 6 and the MEMS micromirror 2. The ceramic ferrule 6 is used to coaxially fix the optical fiber, and the focusing lens 5 is used to focus the incident beam.

[0029] Specifically, the focusing lens 5 and the ceramic ferrule 6 can both be embedded in the accommodating cavity 11 for fixation. The ceramic ferrule 6 can accurately fix and connect to the optical fiber 9 to ensure efficient transmission of the incident beam signal. The focusing lens 5 can focus the incident beam to reduce transmission loss.

[0030] More preferably, the annular light-emitting window 4 is sealed to the housing 1 by adhesive bonding. Specifically, it can be bonded and cured with medical-grade epoxy resin or silicone sealant, or other curing biocompatible adhesives, which have good adhesion, sealing performance and resistance to humid heat aging, and are used to achieve reliable encapsulation in medical application environments.

[0031] More preferably, the housing 1 includes two sub-housings distributed axially on both sides of the annular light-emitting window 4, and the two sub-housings can be sealed and connected to the periphery of the annular light-emitting window 4.

[0032] Specifically, the two sub-shells on both sides of the annular light-emitting window 4 are the incident light path end shell and the motor end shell, respectively, and are connected to the two ends of the annular light-emitting window 4 by adhesive. The lens bracket inside the incident light path end shell is provided with positioning steps to ensure that the light path does not shift after the focusing lens 5 is installed. The inner wall is coated with strong adhesive to enhance the fixing stability of the ceramic ferrule 6.

[0033] More preferably, the cavity 11 is further provided with a wire groove 7 that communicates with the outside, and the wire groove 7 is used to accommodate the electrical connection wires 8 of the drive module 3 and / or MEMS micromirror 2.

[0034] Specifically, the slot 7 is located on the inner wall of the incident light path end housing, with a width of 2-3mm and a depth of 1-2.5mm. It is used to accommodate the external drive control signal lines and power lines of the MEMS micromirror 2, as well as the power lines and control lines of the drive module 3. The overall wiring layout is compact, avoiding contact and friction between the electrical connection line 8 and internal optical components such as the focusing lens 5 and the MEMS micromirror 2, while reducing the obstruction of the light path and ensuring stable signal transmission and unobstructed light path.

[0035] More preferably, the annular light-emitting window 4 is made of a light-transmitting material; while protecting the probe, it allows the incident light beam to be fully transmitted, reducing the loss of the incident light beam.

[0036] More preferably, the annular light-emitting window 4 is made of optical glass and has an anti-reflective coating on its surface. It is preferably made of sapphire glass, fused silica, or other materials with high optical transmittance and biocompatibility to enable the emission of the scanning beam and ensure structural sealing and mechanical strength. Moreover, the surface of the annular light-emitting window 4 is treated with an anti-reflective coating to reduce light reflection loss. Its edge is sealed to the housing 1 with sealant to prevent body fluid from entering the probe.

[0037] More preferably, the shell 1 is made of medical-grade material, which is high-strength, corrosion-resistant, and can come into contact with human tissue, such as 316L medical stainless steel or other medical materials. It has good mechanical strength, biocompatibility and corrosion resistance, and is suitable for medical detection environments.

[0038] More preferably, the MEMS micromirror 2 is a high-response-speed micromirror, including but not limited to MEMS micromirrors 2 that can be driven by electrothermal, piezoelectric, electromagnetic, or electrostatic methods. Its scanning angle can be adjusted according to clinical needs to ensure that the imaging coverage and resolution are matched. The two modes of the driving module 3 are adapted to the MEMS micromirror 2 through different mechanical structures: [The specific configuration is missing from the original text.] Figures 2-7 In the image, the arrow-marked line at the front end of the MEMS micromirror 2 is the scanning path indicator line for the light.

[0039] Mode 1: Please refer to Figures 2-4 The drive module 3 includes a first rotary motor 31, a vibration motor 32, and an elastic element 33 arranged sequentially along the axial direction. The first rotary motor 31 is fixedly connected to the inner wall of the housing 1. The drive end of the first rotary motor 31 is fixedly connected to the vibration motor 32. The drive end of the vibration motor 32 is connected to the MEMS micromirror 2 via the elastic element 33. The first rotary motor 31 can drive the vibration motor 32, the elastic element 33, and the MEMS micromirror 2 to rotate circumferentially, thereby enabling circumferential scanning of the MEMS micromirror 2. The vibration motor 32 can drive the elastic element 33 and the MEMS micromirror 2 to vibrate synchronously along the axial direction to form resonance, and the mirror surface of the MEMS micromirror 2 can be deflected, thereby enabling axial scanning of the MEMS micromirror 2. During operation... First, the vibration motor 32 is started, and its high-frequency vibration drives the elastic element 33, such as a spring, and the MEMS micromirror 2 to resonate. The resonant frequency can be set to the natural frequency of the MEMS micromirror 2, so that the MEMS micromirror 2 can deflect its own mirror surface due to the mechanical coupling effect during the back-and-forth movement, thereby completing the one-dimensional scanning of the MEMS micromirror 2 without external power supply. Then, the first rotary motor 31 drives the combination structure of vibration motor 32, elastic element 33 and MEMS micromirror 2 to rotate at a constant speed. The speed can be adjusted. In this way, the two-dimensional ring scan is achieved by superimposing the one-dimensional scanning and rotational motion. This mode does not require an additional driving power supply for the MEMS micromirror 2, and is more suitable for scenarios with high requirements for probe power consumption and circuit complexity.

[0040] Mode 2: Please refer to Figures 5-7The drive module 3 includes a second rotary motor 34, which is fixedly connected to the inner wall of the housing 1. The drive end of the second rotary motor 34 is connected to the MEMS micromirror 2 via a transmission connection. The second rotary motor 34 can drive the MEMS micromirror 2 to rotate circumferentially, thereby enabling the MEMS micromirror 2 to perform circumferential scanning. Under the action of external drive (i.e., electrically connected to an external power supply via electrical connection line 8), the MEMS micromirror 2 can perform at least axial scanning. During operation, the MEMS micromirror 2 first starts a one-dimensional or two-dimensional scanning mode, such as horizontal swing or horizontal + vertical swing, by applying external power according to imaging requirements. Then, the second rotary motor 34 drives the MEMS micromirror 2 to rotate uniformly around its axis via the connector 35. The speed adjustment range is consistent with mode one. Through the superposition of scanning and rotation actions, a continuous 360° circumferential scan is formed. When the MEMS micromirror 2 performs a one-dimensional scan, such as... Figure 6 As shown, the MEMS micromirror 2 can swing horizontally in the axial direction to achieve axial scanning. Combined with the 360° circumferential rotation drive of the second rotary motor 34, a continuous 360° annular scan is formed. When the MEMS micromirror 2 performs two-dimensional scanning, it swings in the horizontal and vertical directions to achieve scanning at a certain angle in the axial and circumferential directions. At this time, the second rotary motor 34 can adjust the stepping parameters according to the circumferential scanning angle of the MEMS micromirror 2 to achieve rotational drive at a certain angle in the circumferential direction. This can be superimposed with the scanning of the MEMS micromirror 2 to form a continuous 360° annular scan. This mode has a simple structure and high reliability, and is suitable for cavity imaging scenarios with moderate requirements for scanning flexibility. The connector 35 is made of lightweight and high-strength material, which ensures connection reliability and reduces the overall driving load.

[0041] The present invention provides an assembly of an OCT scanning probe driven by a motor and a MEMS micromirror, as follows: The assembly follows the principle of centered optical path and orderly wiring. The optical fiber 9 is fitted with a ceramic ferrule 6, which is fixed inside the optical fiber conduit at the center of the incident optical path housing to ensure the basic positioning of the outgoing optical path of the optical fiber 9. A focusing lens 5 is installed in a lens holder inside the incident optical path housing, fixing it in a suitable position to guide the light emitted from the optical fiber 9 to the reflective surface of the MEMS micromirror 2. The MEMS micromirror 2, assembled and fixed with the drive module 3, forms a ring-shaped scanning module, which is installed within the reserved space enclosed by the motor-end housing and the incident optical path housing. An annular light-emitting window 4 is provided at the front opening of the motor-end housing. Furthermore, a cable tray 7 is provided below the incident optical path housing, through which control signal lines and power lines are led out and through the inner wall cavity of the housing to avoid obstructing the optical path.

[0042] The optical transmission process is as follows: the probe light emitted by the light source is transmitted through the optical fiber 9. The ceramic ferrule 6 at the end of the optical fiber 9 not only protects the end face of the optical fiber but also ensures the coaxiality of the optical fiber 9 and the focusing lens 5. After the light is emitted from the optical fiber 9, it is incident on the focusing lens 5. The focusing lens 5 is an aspherical lens that focuses the diverging light into a parallel beam or a small-angle converging beam to ensure the energy of the beam is concentrated. The focused beam is projected onto the reflective surface of the MEMS micromirror 2. After being reflected by the MEMS micromirror 2, the propagation direction is changed, and it passes through the annular light exit window 4 and enters the scanning area 10 of the inner wall of the human cavity. The reflected light from tissues at different depths of the cavity returns along the original optical path and is transmitted through the MEMS micromirror 2 and the focusing lens 5 to the optical fiber 9. Finally, it is transmitted to the system end and forms an interference signal with the light reflected back from the reference arm optical path. The signal is then transmitted to the signal processing system to form an OCT signal (Ascan signal) with depth information.

[0043] The following are specific application examples of the OCT scanning probe driven by the motor and MEMS micromirror provided by this invention: Applications in respiratory tract cavity scanning: Considering the requirements of respiratory tract cavity on probe power consumption and circuit complexity, drive module 3 is selected in mode one, eliminating the need for an external power supply for MEMS micromirror 2 and reducing probe power consumption. During probe assembly, the vibration frequency of vibration motor 32 is adjusted to match the resonant frequency of MEMS micromirror 2 with the vibration frequency, ensuring one-dimensional scanning without an external power supply. The probe is connected to the rear-end imaging system, and inserted into the target area of ​​the respiratory tract through the bronchoscope biopsy channel. After system startup, vibration motor 32 drives MEMS micromirror 2 to resonate and achieve one-dimensional scanning, while the first rotary motor 31 drives the combined structure to rotate and achieve circular scanning, forming a 360° circumferential scan or a local circumferential scan. Imaging signals from the respiratory tract cavity are acquired in real time, generating three-dimensional images. Doctors assess airway wall lesions based on these images. This mode features simpler probe circuitry, reducing interference with bronchoscope operation and adapting to the complex environment of the respiratory tract.

[0044] Application of digestive tract cavity scanning: Based on the degree of narrowing of the digestive tract cavity, drive module 3 is selected to adopt mode two, which is adapted to the digestive tract biopsy channel; the assembled ring scanning probe is connected to the back-end OCT imaging system, and the line led out through the cable slot 7 is connected to the control system. The scanning parameters of MEMS microscope 2 and the rotation speed of the rotary motor are adjusted, and MEMS microscope 2 is set to two-dimensional scanning mode; the probe is sent into the target scanning area through the digestive tract endoscope biopsy channel, the imaging system is started, and the light is transmitted to the inner wall of the cavity through the optical path. The two-dimensional scanning of MEMS microscope 2 and the rotational motion of the second rotary motor 34 are superimposed, first rotating 180° clockwise and then returning to the original position and rotating 180° in the opposite direction to achieve a 360° ring scan of the digestive tract cavity, or a local ring scan; the back-end system receives the optical signal returned along the original optical path, processes it and generates a three-dimensional image of the inner wall of the cavity. Doctors can observe the structure of the mucosa and submucosa through the image, identify suspicious lesion areas, and, if necessary, control the probe to stay at the lesion site for scanning to obtain higher resolution local images.

[0045] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. An OCT scanning probe driven by a motor and a MEMS micromirror in a coordinated manner, characterized in that: It includes a housing (1) with a accommodating cavity (11) and a MEMS micromirror (2) and a driving module (3) both placed in the accommodating cavity (11). The MEMS micromirror (2) is placed in the cavity (11) and connected to the driving module (3) at its front end. The driving module (3) is connected to the inner wall of the housing (1). The front peripheral wall of the housing (1) has an annular light-emitting window (4). An incident light beam can pass into the cavity (11). The incident light beam is transmitted to the MEMS micromirror (2) for reflection. The reflected light beam is irradiated to the target imaging area through the annular light-emitting window (4). After being reflected by the target imaging area, the incident light beam returns along the original optical path and is received and processed. The driving module (3) can drive the MEMS micromirror (2) to rotate circumferentially for circumferential scanning. The MEMS micromirror (2) can also perform axial scanning under external driving or the driving module (3). After being reflected by the MEMS micromirror (2), the scanning path of the incident light beam on the target imaging area moves to achieve circumferential and axial scanning imaging of the target imaging area.

2. The OCT scanning probe driven by a motor and a MEMS micromirror as described in claim 1, characterized in that: The drive module (3) includes a first rotary motor (31), a vibration motor (32) and an elastic element (33) arranged sequentially along the axial direction. The first rotary motor (31) is fixedly connected to the inner wall of the housing (1). The drive end of the first rotary motor (31) is fixedly connected to the vibration motor (32). The drive end of the vibration motor (32) is connected to the MEMS micromirror (2) through the elastic element (33). The first rotary motor (31) can drive the vibration motor (32), the elastic element (33) and the MEMS micromirror (2) to rotate circumferentially, so as to realize the circumferential scanning of the MEMS micromirror (2); the vibration motor (32) can drive the elastic element (33) and the MEMS micromirror (2) to vibrate synchronously along the axial direction to form resonance, and the mirror surface of the MEMS micromirror (2) can be deflected, so as to realize the axial scanning of the MEMS micromirror (2).

3. The OCT scanning probe driven by a motor and a MEMS micromirror in accordance with claim 1, characterized in that: The drive module (3) includes a second rotary motor (34), which is fixedly connected to the inner wall of the housing (1), and the drive end of the second rotary motor (34) is connected to the MEMS micromirror (2) for transmission. The second rotary motor (34) can drive the MEMS micromirror (2) to rotate circumferentially so as to realize the circumferential scanning of the MEMS micromirror (2); and the MEMS micromirror (2) can be electrically connected to an external power source and can at least perform axial scanning.

4. The OCT scanning probe driven by a motor and a MEMS micromirror as described in claim 1, characterized in that: It also includes a focusing lens (5) and a ceramic ferrule (6) coaxially disposed in the accommodating cavity (11). The focusing lens (5) is disposed between the ceramic ferrule (6) and the MEMS micromirror (2). The ceramic ferrule (6) is used to coaxially fix the optical fiber, and the focusing lens (5) is used to focus the incident beam.

5. The OCT scanning probe driven by a motor and a MEMS micromirror in accordance with claim 1, characterized in that: The cavity (11) is also provided with a wire groove (7) that connects to the outside world. The wire groove (7) is used to accommodate the electrical connection wires (8) of the drive module (3) and / or the MEMS micromirror (2).

6. The OCT scanning probe driven by a motor and a MEMS micromirror in accordance with claim 1, characterized in that: The annular light-emitting window (4) is sealed to the housing (1).

7. The OCT scanning probe driven by a motor and a MEMS micromirror as described in claim 6, characterized in that: The housing (1) includes two sub-shells distributed axially on both sides of the annular light-emitting window (4), and the two sub-shells can be sealed and connected to the periphery of the annular light-emitting window (4).

8. The OCT scanning probe driven by a motor and a MEMS micromirror as described in claim 1, characterized in that: The material of the annular light-emitting window (4) is set to a light-transmitting material.

9. The OCT scanning probe driven by a motor and a MEMS micromirror in accordance with claim 1, characterized in that: The shell (1) is made of medical grade material.

Images