Oral cavity measuring system and optical coherence tomography structure

Abstract

The invention discloses an oral cavity measurement system and an optical coherence tomography structure. The oral cavity measurement system comprises a plurality of light source generation modules, an image acquisition module, an imaging module, a reflector and a control module, the plurality of light source generation modules comprise a first light source generation module and a second light source generation module; the first light source generation module is used for generating a first light beam to the reflector; the second light source generation module is used for generating a second light beam to the reflector; the imaging module is used for imaging the first light beam and the second light beam reflected by the tooth to be detected to the image acquisition module; the image acquisition module is used for acquiring a first optical image formed by the first light beam through the imaging module and a second optical image formed by the second light beam through the imaging module; and the control module determines a three-dimensional point cloud picture of the tooth to be detected according to the first optical image and the second optical image. By means of the structure, the three-dimensional model of the tooth to be detected is established, tooth diseases are determined in time, and the accuracy and safety of oral cavity problem diagnosis are improved.

Description

Technical Field

[0001] This invention relates to the field of oral measurement technology, and more particularly to an oral measurement system and an optical coherence tomography (OCT) structure. Background Technology

[0002] With the widespread adoption of digital dental impression instruments, the speed and accuracy of 3D dental modeling have reached near perfection. The next step in the development of digital dental impression instruments lies in extending their functionality and expandability. Future digital dental impression instruments will not only be dental digital modeling devices but will also possess multiple diagnostic functions for oral diseases.

[0003] Traditional oral cavity measurements are primarily based on confocal and structured light techniques. However, these techniques can only image the surface of teeth and gums, failing to obtain information about the interior of the teeth, making them essentially no different from visual inspection for diagnosing oral diseases. Although cone-beam computed tomography (CBCT, or oral CT) can obtain fluoroscopic images of the oral cavity, its accuracy is low, limiting its ability to diagnose and treat many diseases, and it also carries radiation risks. Summary of the Invention

[0004] This invention provides an oral measurement system and an optical coherence tomography (OCT) structure to obtain image information of the surface and interior of the tooth under test by imaging the surface and interior of the tooth under test. Based on the image information, a three-dimensional point cloud map of the tooth under test is established to accurately analyze the condition of the tooth under test, promptly identify dental diseases, and improve the accuracy and safety of oral problem diagnosis.

[0005] In a first aspect, the present invention provides an oral measurement system, comprising multiple light source generation modules, an image acquisition module, an imaging module, a reflector, and a control module;

[0006] The multiple light source generating modules include a first light source generating module and a second light source generating module. The first light source generating module is used to generate a first light beam to a reflector so that the first light beam is reflected to the tooth to be tested. The second light source generating module is used to generate a second light beam to a reflector so that the second light beam is reflected to the tooth to be tested.

[0007] The imaging module is used to image the first and second beams reflected by the tooth under test onto the image acquisition module;

[0008] The image acquisition module is used to acquire a first optical image formed by the first beam passing through the imaging module and a second optical image formed by the second beam passing through the imaging module;

[0009] The control module is electrically connected to the image acquisition module and is used to receive the first optical image and the second optical image, and to determine the three-dimensional point cloud map of the tooth to be tested based on the first optical image and the second optical image.

[0010] Optionally, the first light source generating module includes a structured light laser; the system also includes a grating mask located in the optical path between the first light source generating module and the reflector;

[0011] A grating mask is used to modulate the first beam into a periodic striped beam of alternating light and dark, so that the striped beam is reflected by a mirror onto the tooth to be tested.

[0012] Optionally, the system may also include a compound eye lens;

[0013] The compound eye lens is located on the laser light path between the first light source generation module and the grating mask; the first beam is a structured light laser, and the compound eye lens is used to homogenize the structured light laser.

[0014] Optionally, the system also includes a first dichroic mirror, which is located in the optical path between the grating mask and the reflector; the image acquisition module includes a first image acquisition unit and a second image acquisition unit; the first image acquisition unit is located on the side of the first dichroic mirror opposite to the grating mask; the second image acquisition unit is located on the side of the reflector opposite to the first dichroic mirror; and the second light source generation module is located on the side of the reflector opposite to the first dichroic mirror.

[0015] The first dichroic mirror is used to separate the striped beam and the second beam, so that the first image acquisition unit acquires the second beam and the second image acquisition unit acquires the striped beam.

[0016] Optionally, the system may also include a projection lens;

[0017] The projection lens is located in the optical path between the first dichroic mirror and the reflector, and is used to project the striped beam onto the reflector.

[0018] Optionally, the system also includes a collimating lens; the collimating lens is located in the optical path between the first light source generation module and the grating mask.

[0019] Optionally, the system also includes a second dichroic mirror, and the multiple light source generating modules also include a third light source generating module; the second dichroic mirror is located in the optical path between the first light source generating module and the reflector; the third light source generating module is located on the side of the second dichroic mirror away from the first light source generating module, and is used to generate a third beam; the image acquisition module is located on the side of the imaging module away from the reflector.

[0020] The second dichroic mirror is used to ensure that both the first and third beams are incident on the surface of the reflecting mirror;

[0021] The control module is electrically connected to the first light source generating module, the second light source generating module, and the third light source generating module respectively, and is used to control the first light source generating module, the second light source generating module, and the third light source generating module to be turned on in a time-sharing manner;

[0022] The image acquisition module is also used to acquire a third optical image formed by the third beam passing through the imaging module;

[0023] The control module is also used to receive a third optical image and determine a three-dimensional point cloud map of the tooth to be tested based on the first, second, and third optical images.

[0024] Optionally, the system also includes an illumination focusing lens; the illumination focusing lens is located in the optical path between the second dichroic mirror and the reflector.

[0025] Optionally, the first light source generating module includes an infrared LED, the second light source generating module includes a white LED, and the third light source generating module includes an ultraviolet LED.

[0026] Secondly, the present invention provides an optical coherence tomography structure, including the oral measurement system described above.

[0027] The technical solution of this invention involves a first light source generating module generating a first light beam, which is incident on a reflector. The incident first light beam is reflected by the reflector onto the tooth to be tested and then reflected from the tooth surface. The reflected first light beam is then imaged onto an image acquisition module by an imaging module. The image acquisition module acquires a first optical image and converts it into a digital signal. Similarly, a second light source generating module generates a second light beam, which is incident on a reflector. The incident second light beam is reflected by the reflector onto the tooth to be tested and then reflected from the tooth surface. The reflected second light beam is then imaged onto an image acquisition module by an imaging module. The image acquisition module acquires a second optical image and converts it into a digital signal. By electrically connecting the control module and the image acquisition module, the control module can receive a first optical image and a second optical image in digital signal form acquired by the image acquisition module. These images include surface and internal information of the tooth under test, as well as its color and texture. Through analysis, processing, and fusion of the first and second optical images, depth and surface information of each pixel of the tooth under test can be obtained. Based on this depth and surface information, a high-precision three-dimensional point cloud map of the tooth under test is generated, enabling faster and more accurate determination of its health status. Using this structure, by imaging the surface and internal condition of the tooth under test, image information of the tooth's surface and interior is obtained. A three-dimensional point cloud map of the tooth is then established based on this image information, allowing for precise analysis of the tooth's condition, timely identification of dental diseases, and improved accuracy and safety in diagnosing oral problems.

[0028] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying 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.

[0030] Figure 1 This is a schematic diagram of the structure of an oral measurement system provided in an embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of another oral measurement system provided in an embodiment of the present invention;

[0032] Figure 3 This is a schematic diagram of another oral measurement system provided in an embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram of the connection relationship of a control module provided in an embodiment of the present invention. Detailed Implementation

[0034] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. 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 should fall within the scope of protection of the present invention.

[0035] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0036] In one embodiment, Figure 1 This is a schematic diagram of an oral measurement system provided in an embodiment of the present invention. This embodiment is applicable to imaging the surface and interior of the tooth to be measured, obtaining a three-dimensional point cloud image of the tooth, and then accurately determining any problems existing in the tooth. Figure 1 As shown, the oral measurement system includes multiple light source generation modules 1, an image acquisition module 2, an imaging module 3, a reflector 4, and a control module 5. The multiple light source generation modules 1 include a first light source generation module 11 and a second light source generation module 12. The first light source generation module 11 generates a first light beam to the reflector 4 so that the first light beam is reflected to the tooth 6 to be tested. The second light source generation module 12 generates a second light beam to the reflector 4 so that the second light beam is reflected to the tooth 6 to be tested. The imaging module 3 is used to image the first light beam and the second light beam reflected by the tooth 6 to the image acquisition module 2. The image acquisition module 2 is used to acquire a first optical image formed by the first light beam passing through the imaging module 3 and a second optical image formed by the second light beam passing through the imaging module 3. The control module 5 is electrically connected to the image acquisition module 2 and is used to receive the first optical image and the second optical image, and determine the three-dimensional point cloud map of the tooth 6 to be tested based on the first optical image and the second optical image.

[0037] The light source generation module 1 is used to generate a light beam. The light source generation module 1 includes a first light source generation module 11 and a second light source generation module 12. Both the first light source generation module 11 and the second light source generation module 12 can be white LEDs, ultraviolet LEDs, infrared LEDs, visible lasers, or polarized light, etc., and the specific type can be determined according to the actual situation, without limitation. In this embodiment, the first light source generation module 11 is used to generate a first light beam, and the second light source generation module 12 is used to generate a second light beam. The first light beam can be a visible laser or an infrared laser, and the second light beam can be white light, an infrared laser, or an ultraviolet laser. The mirror / beam steering element 4 is an optical reflective element (possibly a plane mirror, dichroic mirror, galvanometer, etc.) used to change the direction of light beam propagation, that is, to guide the light beams generated from the two light sources to the surface of the tooth 6 to be tested. The imaging module 3 is a system composed of one or more optical elements, typically including an imaging lens, a relay lens, a filter, and a dichroic mirror. The first and second light beams reflected from the surface of the tooth 6 under test are collected; and these beams are focused and clearly imaged onto the photosensitive surface of the image acquisition module 2. The image acquisition module 2 is typically a CMOS or CCD image sensor, responsible for receiving the optical image formed by the imaging module 3 and converting the optical image into a digital signal. The control module 5 is the core control structure of this embodiment, used to acquire the first and second optical images generated by the image acquisition module 2 to obtain a three-dimensional point cloud map of the tooth 6 under test.

[0038] Specifically, the first light beam generated by the first light source generation module 11 is incident on the reflector 4. The reflector 4 reflects the incident first light beam onto the tooth 6 to be tested. After being reflected onto the tooth 6, the first light beam is reflected from the surface of the tooth 6. The reflected first light beam passes through the imaging module 3 and is imaged onto the image acquisition module 2, enabling the image acquisition module 2 to acquire a first optical image and convert it into a digital signal. Similarly, the second light beam generated by the second light source generation module 12 is incident on the reflector 4. The reflector 4 reflects the incident second light beam onto the tooth 6 to be tested. After being reflected onto the tooth 6, the second light beam is reflected from the surface of the tooth 6. The reflected second light beam passes through the imaging module 3 and is imaged onto the image acquisition module 2, enabling the image acquisition module 2 to acquire a second optical image and convert it into a digital signal. By electrically connecting the control module 5 and the image acquisition module 2, the control module 5 can receive the first optical image and the second optical image in the form of digital signals acquired by the image acquisition module 2. The first optical image and the second optical image include the surface and internal information of the tooth 6 to be tested, as well as the color and texture information of the tooth 6 to be tested. By analyzing, processing and fusing the first optical image and the second optical image, such as color correction, noise reduction, decoding and phase calculation, the depth information and surface information of each pixel of the tooth 6 to be tested can be obtained. Based on the depth information and surface information, a high-precision three-dimensional point cloud map of the tooth 6 to be tested can be generated to more quickly and accurately determine the condition of the tooth 6 to be tested (such as demineralization, caries, cracks, fractures or health).

[0039] The technical solution of this invention involves a first light source generating module generating a first light beam, which is incident on a reflector. The incident first light beam is reflected by the reflector onto the tooth to be tested and then reflected from the tooth surface. The reflected first light beam is then imaged onto an image acquisition module by an imaging module. The image acquisition module acquires a first optical image and converts it into a digital signal. Similarly, a second light source generating module generates a second light beam, which is incident on a reflector. The incident second light beam is reflected by the reflector onto the tooth to be tested and then reflected from the tooth surface. The reflected second light beam is then imaged onto an image acquisition module by an imaging module. The image acquisition module acquires a second optical image and converts it into a digital signal. By electrically connecting the control module and the image acquisition module, the control module can receive a first optical image and a second optical image in digital signal form acquired by the image acquisition module. These images include surface and internal information of the tooth under test, as well as its color and texture. Through analysis, processing, and fusion of the first and second optical images, depth and surface information of each pixel of the tooth under test can be obtained. Based on this depth and surface information, a high-precision three-dimensional point cloud map of the tooth under test is generated, enabling faster and more accurate determination of its health status. Using this structure, by imaging the surface and internal condition of the tooth under test, image information of the tooth's surface and interior is obtained. A three-dimensional point cloud map of the tooth is then established based on this image information, allowing for precise analysis of the tooth's condition, timely identification of dental diseases, and improved accuracy and safety in diagnosing oral problems.

[0040] In another specific embodiment, optionally, Figure 2 This is a schematic diagram of another oral measurement system provided in an embodiment of the present invention, with reference to... Figure 2 As shown, the first light source generation module 11 includes a structured light laser; the system also includes a grating mask 7, which is located in the optical path between the first light source generation module 11 and the reflector 4; the grating mask 7 is used to modulate the first beam into a periodic striped beam with alternating bright and dark areas, so that the striped beam is reflected by the reflector 4 to the tooth to be tested 6.

[0041] Among them, the grating mask 7 is an optical element with a periodic light-transmitting and light-blocking structure, which may include, but is not limited to, physical masks, holographic gratings, or digital micromirror devices (DMDs). A physical mask is formed by depositing periodic metal stripes (such as chromium) on a glass or quartz substrate, creating an alternating structure of light transmission and opacity; a holographic grating is a periodic refractive index modulation material made using interference techniques; and a digital micromirror device is a programmable "dynamic mask." The first light source generation module 11 includes a structured light laser, which is used to generate structured light laser light, that is, the first beam is visible light structured light laser light.

[0042] Specifically, by placing the grating mask 7 in the optical path between the first light source generation module 11 and the reflector 4, the first light beam generated by the first light source generation module 11 is incident on the grating mask 7. After passing through the grating mask 7, the first light beam forms a periodic striped beam with alternating bright and dark areas. The striped beam is reflected by the reflector 4 to the tooth under test 6 and then reflected from the tooth under test 6, and imaged onto the image acquisition module 2 by the imaging module 3. The first optical image acquired by the image acquisition module 2 is a striped image with alternating bright and dark areas or a striped image that has undergone deformation (such as bending, stretching, or compression), and the intensity of the stripes or the degree of deformation is related to the depth of the tooth under test 6, that is, the depth information of the tooth under test 6 in the z direction can be obtained. In addition, in this embodiment, the second light source generating module 12 can serve as a supplementary light source, such as white light, ultraviolet light, or infrared light. The second light beam generated by the second light source generating module 12 is reflected from the tooth 6 to be tested and imaged onto the image acquisition module 2 by the imaging module 3. The second optical image acquired by the image acquisition module 2 includes information on the color, texture, and appearance of the tooth 6 to be tested, i.e., information on the xy plane. After receiving the stripe image and the second optical image, the control module 5 analyzes the brightness or deformation of the stripes and, combined with the xy plane information, can deduce a three-dimensional point cloud map of the tooth 6 to be tested, so as to accurately diagnose the disease of the tooth 6 to be tested based on the three-dimensional point cloud map.

[0043] Optional, continue to refer to Figure 2 The system also includes a compound eye lens 8; the compound eye lens 8 is located in the laser light path between the first light source generation module 11 and the grating mask 7; the first beam is a structured light laser, and the compound eye lens 8 is used to homogenize the structured light laser.

[0044] Among them, the compound eye lens 8 is an array structure composed of a large number of microlenses (called "microlenses") arranged regularly on a plane. The diameter of each microlens is usually tens of micrometers to several millimeters; the whole is arranged in a planar or curved surface; the materials are mostly glass, quartz or plastic (such as PMMA, COC).

[0045] Specifically, by placing the compound eye lens 8 in the laser light path between the first light source generation module 11 and the grating mask 7, the first beam generated by the first light source generation module 11 will be incident on the compound eye lens 8. The compound eye lens 8 will homogenize the incident first beam, making the non-uniform first beam into a flat and uniform multi-beam structured light laser, expanding the laser field of view, ensuring that the structured light laser is incident on the entire surface area of ​​the tooth 6 to be tested, improving the signal-to-noise ratio and measurement accuracy, and providing a basis for the subsequent generation of high-quality stripes by the first beam through the grating mask 7.

[0046] Optional, continue to refer to Figure 2 The system also includes a first dichroic mirror 9, which is located in the optical path between the grating mask 7 and the reflector 4; the image acquisition module 2 includes a first image acquisition unit 21 and a second image acquisition unit 22; the first image acquisition unit 21 is located on the side of the first dichroic mirror 9 away from the grating mask 7; the second image acquisition unit 22 is located on the side of the reflector 4 away from the first dichroic mirror 9; the second light source generation module 12 is located on the side of the reflector 4 away from the first dichroic mirror 9; the first dichroic mirror 9 is used to separate the striped beam and the second beam, so that the first image acquisition unit 21 acquires the second beam and the second image acquisition unit 22 acquires the striped beam.

[0047] Optionally, the system also includes a projection lens 10; the projection lens 10 is located in the optical path between the first dichroic mirror 9 and the reflector 4, and is used to project the striped beam onto the reflector 4.

[0048] The first dichroic mirror 9 is an optical element coated with a special multilayer film, capable of selectively reflecting or transmitting light according to its wavelength. In this embodiment, the first dichroic mirror 9 is positioned in the optical path between the grating mask 7 and the reflector 4. By pre-setting the transmitted light wavelength of the first dichroic mirror 9, i.e., the laser wavelength of the first beam, the first beam, after entering the first dichroic mirror 9, can pass through the first dichroic mirror 9 and be transmitted to the compound eye lens 8, thus achieving normal transmission of the first beam. The projection lens 10 is an optical system that magnifies or reduces a light source or pattern (such as an image on an LCD, DMD, or grating mask) and projects it clearly onto the surface of the tooth 6 to be tested through the reflector 4. When setting up the projection lens 10 and the imaging module 3, the projection lens 10 and the imaging module 3 can be arranged vertically along the direction perpendicular to the optical path.

[0049] It should be noted that, in this embodiment, the image acquisition module 2 includes a first image acquisition unit 21 and a second image acquisition unit 22; the first image acquisition unit 21 is located on the side of the first dichroic mirror 9 facing away from the grating mask 7; the second image acquisition unit 22 is located on the side of the reflector 4 facing away from the first dichroic mirror 9. During actual optical path transmission, the first beam (i.e., structured light laser) generated by the first light source generation module 11 becomes a uniform first beam after passing through the compound eye lens 8, and forms alternating bright and dark striped beams after passing through the grating mask 7. The striped beam is emitted to the reflector 4 after passing through the first dichroic mirror 9 and the projection lens 10. The reflector 4 reflects the first beam to the tooth 6 to be tested, and the striped beam reflected from the surface of the tooth 6 is imaged by the imaging module 3 to the second image acquisition unit 22, so that the second image acquisition unit 22 receives the first optical image formed by the first beam passing through the imaging module 3. For the second light source generating module 12, the second light beam generated by the second light source generating module 12 is reflected by the reflector 4 to the tooth 6 to be tested, and then reflected from the tooth 6 to the projection lens 10 after being reflected by the reflector 4. The projection lens 10 then images the light onto the first image acquisition unit 21. The control module 5 is electrically connected to the first image acquisition unit 21 and the second image acquisition unit 22 respectively. After receiving the first optical image and the second optical image, the control module 5 analyzes the images to finally obtain a three-dimensional point cloud map of the tooth 6 to be tested.

[0050] It should also be noted that, as can be seen from the above, in addition to projecting the first beam onto the reflector 4 and reflecting it onto the tooth 6 to be tested, the projection lens 10 can also be used to image the second beam reflected from the reflector 4 onto the first image acquisition unit 21. In this optical path, the projection lens 10 and the imaging module 3 are reused, which can reduce the system size and make it easier to carry.

[0051] Optional, continue to refer to Figure 2 The system also includes a collimating lens 101; the collimating lens 101 is located in the optical path between the first light source generation module 11 and the grating mask 7.

[0052] The collimating lens 101 is a lens used to collimate a light beam. In this embodiment, the collimating lens 101 is used to collimate the first light beam generated by the first light source generation module 11 so that the collimated first light beam is incident on the compound eye lens 8.

[0053] In another specific embodiment, optionally, Figure 3 This is a schematic diagram of another oral measurement system provided in an embodiment of the present invention. Figure 4 This is a schematic diagram of the connection relationship of a control module provided in an embodiment of the present invention, with reference to... Figure 3 and Figure 4As shown, the system also includes a second dichroic mirror 100, and the multiple light source generating modules 1 also include a third light source generating module 13; the second dichroic mirror 100 is located in the optical path between the first light source generating module 11 and the reflector 4; the third light source generating module 13 is located on the side of the second dichroic mirror 100 away from the first light source generating module 11, and is used to generate a third beam; the image acquisition module 2 is located on the side of the imaging module 3 away from the reflector 4; the second dichroic mirror 100 is used to make both the first beam and the third beam incident on the surface of the reflector 4; the control module 5 is electrically connected to the first light source generating module 11, the second light source generating module 12 and the third light source generating module 13 respectively, and is used to control the first light source generating module 11, the second light source generating module 12 and the third light source generating module 13 to be turned on in a time-division manner; the image acquisition module 2 is also used to acquire a third optical image formed by the third beam passing through the imaging module 3; the control module 5 is also used to receive the third optical image, and determine the three-dimensional point cloud map of the tooth 6 to be tested based on the first optical image, the second optical image and the third optical image.

[0054] The second dichroic mirror 100 has the same meaning and function as the first dichroic mirror 9, as described above, and will not be repeated here. The third light source generating module 13 is used to generate a third light beam. In this embodiment, the third light beam can be white light, infrared light, or ultraviolet light. Preferably, the first light source generating module 11 includes an infrared LED, the second light source generating module includes a white LED, and the third light source generating module includes an ultraviolet LED. Therefore, the first light beam is infrared light, the second light beam is white light, and the third light beam is ultraviolet light.

[0055] Specifically, by electrically connecting the control module 5 to the first light source generating module 11, the second light source generating module 12, and the third light source generating module 13 respectively, the control module 5 can control the on and off times of the first light source generating module 11, the second light source generating module 12, and the third light source generating module 13 to achieve time-division multiplexing. That is, when the control module 5 controls the first light source generating module 11 to turn on, it also controls the second light source generating module 12 and the third light source generating module 13 to turn off; when it controls the second light source generating module 12 to turn on, it also controls the first light source generating module 11 and the third light source generating module 13 to turn off; and when it controls the third light source generating module 13 to turn on, it also controls the first light source generating module 11 and the second light source generating module 12 to turn off. In this way, when the first light source generating module 11 is turned on, the infrared light generated by the first light source generating module 11 is incident on the reflector 4 through the second dichroic mirror 100 and then reflected by the reflector 4 onto the tooth to be tested 6. After being reflected from the tooth to be tested 6, the light is imaged onto the image acquisition module 2 by the imaging module 3, and the image acquisition module 2 acquires the first optical image. Similarly, image acquisition module 2 can acquire the second and third optical images and send them to control module 5. Based on the first, second, and third optical images, control module 5 analyzes them to obtain a three-dimensional point cloud image of the tooth to be tested 6.

[0056] Optional, continue to refer to Figure 3 The system also includes an illumination focusing lens 200; the illumination focusing lens 200 is located in the optical path between the second dichroic mirror 100 and the reflector 4.

[0057] The illumination focusing lens 200 is a lens that illuminates the optical path while focusing the first beam and the third beam. In this embodiment, the first beam or the third beam converges after entering the illumination focusing lens 200, and the converged beam enters the reflector 4. This can increase the beam energy and avoid energy loss due to excessive beam dispersion.

[0058] Furthermore, since the illumination focusing lens 200 and the imaging optical path are no longer mixed, the two lenses of the illumination focusing lens 200 and the imaging module 2 do not need to be arranged symmetrically, and their sizes can be completely different. In order to reduce the size of the optical path, this embodiment integrates the first light source generating module 11 and the third light source generating module 13 on both sides of the second dichroic mirror 100. If the system can accept a larger size, the three light sources, the first light source generating module 11, the second light source generating module 12, and the third light source generating module 13, can also be integrated together. The specific implementation can be determined according to the actual situation, and no restrictions are imposed here.

[0059] Optionally, the system also includes a housing, in which the light source generating module 1, image acquisition module 2, imaging module 3, reflector 4, and control module 5 are all located for easy portability.

[0060] Based on the same inventive concept, this invention provides an optical coherence tomography (OCT) structure, including the aforementioned oral measurement system. The OCT structure provided by this invention possesses the corresponding functional modules and beneficial effects of an oral measurement system.

[0061] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0062] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. An oral measurement system, characterized in that, It includes multiple light source generation modules, image acquisition modules, imaging modules, reflectors, and control modules; The plurality of light source generating modules include a first light source generating module and a second light source generating module. The first light source generating module is used to generate a first light beam to the reflector so that the first light beam is reflected to the tooth to be tested. The second light source generating module is used to generate a second light beam to the reflector so that the second light beam is reflected to the tooth to be tested. The imaging module is used to image the first beam and the second beam reflected by the tooth under test onto the image acquisition module; The image acquisition module is used to acquire a first optical image formed by the first beam passing through the imaging module, and a second optical image formed by the second beam passing through the imaging module; The control module is electrically connected to the image acquisition module and is used to receive the first optical image and the second optical image, and determine the three-dimensional point cloud map of the tooth to be tested based on the first optical image and the second optical image.

2. The oral measurement system according to claim 1, characterized in that, The first light source generating module includes a structured light laser; the system also includes a grating mask located in the optical path between the first light source generating module and the reflector; The grating mask is used to modulate the first beam into a periodic striped beam with alternating bright and dark areas, so that the striped beam is reflected by the mirror onto the tooth to be tested.

3. The oral measurement system according to claim 2, characterized in that, It also includes compound eye lenses; The compound eye lens is located in the laser light path between the first light source generating module and the grating mask; the first beam is a structured light laser, and the compound eye lens is used to homogenize the structured light laser.

4. The oral measurement system according to claim 2, characterized in that, It also includes a first dichroic mirror, which is located in the optical path between the grating mask and the reflector; the image acquisition module includes a first image acquisition unit and a second image acquisition unit; the first image acquisition unit is located on the side of the first dichroic mirror away from the grating mask; the second image acquisition unit is located on the side of the reflector away from the first dichroic mirror; the second light source generation module is located on the side of the reflector away from the first dichroic mirror; The first dichroic mirror is used to separate the striped beam and the second beam, so that the first image acquisition unit acquires the second beam and the second image acquisition unit acquires the striped beam.

5. The oral measurement system according to claim 4, characterized in that, It also includes a projection lens; The projection lens is located in the optical path between the first dichroic mirror and the reflector, and is used to project the striped beam onto the reflector.

6. The oral cavity measurement system according to claim 2, characterized in that, It also includes a collimating lens; the collimating lens is located in the optical path between the first light source generating module and the grating mask.

7. The oral measurement system according to claim 1, characterized in that, It also includes a second dichroic mirror; the plurality of light source generating modules further include a third light source generating module; the second dichroic mirror is located in the optical path between the first light source generating module and the reflector; the third light source generating module is located on the side of the second dichroic mirror away from the first light source generating module, and is used to generate a third light beam; the image acquisition module is located on the side of the imaging module away from the reflector; The second dichroic mirror is used to ensure that both the first beam and the third beam are incident on the surface of the reflector; The control module is electrically connected to the first light source generating module, the second light source generating module, and the third light source generating module respectively, and is used to control the first light source generating module, the second light source generating module, and the third light source generating module to be turned on in a time-sharing manner; The image acquisition module is also used to acquire a third optical image formed by the third beam passing through the imaging module; The control module is also used to receive the third optical image and determine a three-dimensional point cloud map of the tooth to be tested based on the first optical image, the second optical image and the third optical image.

8. The oral measurement system according to claim 7, characterized in that, It also includes an illumination focusing lens; the illumination focusing lens is located in the optical path between the second dichroic mirror and the reflector.

9. The oral measurement system according to claim 7, characterized in that, The first light source generating module includes an infrared LED, the second light source generating module includes a white LED, and the third light source generating module includes an ultraviolet LED.

10. An optical coherence tomography (OCT) structure, characterized in that, Includes the oral measurement system according to any one of claims 1-9.

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