WO2023075543A1 - 구강 스캐너 - Google Patents
구강 스캐너 Download PDFInfo
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- WO2023075543A1 WO2023075543A1 PCT/KR2022/016813 KR2022016813W WO2023075543A1 WO 2023075543 A1 WO2023075543 A1 WO 2023075543A1 KR 2022016813 W KR2022016813 W KR 2022016813W WO 2023075543 A1 WO2023075543 A1 WO 2023075543A1
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- optical system
- reflector
- light
- prism
- case
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- 230000003287 optical effect Effects 0.000 claims abstract description 184
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Images
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/24—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor for the mouth, i.e. stomatoscopes, e.g. with tongue depressors; Instruments for opening or keeping open the mouth
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/00163—Optical arrangements
- A61B1/00194—Optical arrangements adapted for three-dimensional imaging
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/24—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor for the mouth, i.e. stomatoscopes, e.g. with tongue depressors; Instruments for opening or keeping open the mouth
- A61B1/247—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor for the mouth, i.e. stomatoscopes, e.g. with tongue depressors; Instruments for opening or keeping open the mouth with means for viewing areas outside the direct line of sight, e.g. dentists' mirrors
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C9/00—Impression cups, i.e. impression trays; Impression methods
- A61C9/004—Means or methods for taking digitized impressions
- A61C9/0046—Data acquisition means or methods
- A61C9/0053—Optical means or methods, e.g. scanning the teeth by a laser or light beam
- A61C9/006—Optical means or methods, e.g. scanning the teeth by a laser or light beam projecting one or more stripes or patterns on the teeth
Definitions
- the present disclosure relates to an intraoral scanner, and more particularly, to an intraoral scanner configured to obtain a three-dimensional image of an oral cavity.
- Impression taking is a clinical procedure necessary to establish a patient's diagnosis and treatment plan by reflecting the condition of the teeth and tissues in the oral cavity to the impression material.
- digital technology is applied to dental clinical and laboratory procedures, cases of using digital impressions that convert impression materials into digital data by scanning an impression in the mouth or an impression without using impression materials are increasing. In this way, as the importance of digital impressions increases in dental diagnosis and treatment, technical development of intraoral scanners is being actively performed.
- An intraoral scanner is a device or system that is inserted into the oral cavity of a dental patient and scans the three-dimensional structure of teeth in a non-contact manner.
- a recently developed intraoral scanner captures 2D image data of the oral cavity and performs 3D modeling of the oral cavity structure based on the 2D image data.
- An intraoral scanner having such a function has expanded its clinical application range and can be used not only for dental restoration treatment but also for manufacturing implants and orthodontic devices.
- the accuracy of the impression is important for successful dental treatment.
- the digital impression through the intraoral scanner does not have the problem of deformation due to contraction or expansion of the impression material, so the impression accuracy is higher than that of the traditional impression taking method.
- the intraoral scanner since the intraoral scanner is used by being non-contactly inserted into the oral cavity of a dental patient, it is preferable to have a structure that allows the patient to feel comfortable while using the intraoral scanner.
- Embodiments disclosed herein provide an intraoral scanner in which a plurality of optical systems are arranged to have a structure suitable for use by being non-contactly inserted into the oral cavity of a dental patient.
- An intraoral scanner includes a case having an opening at one end, a light source unit disposed inside the case and radiating light, a first reflector configured to reflect light emitted from the light source unit, and a first reflection unit.
- a first optical system including a second reflector configured to reflect the light reflected by the unit toward the opening, disposed in the opening, and reflecting the light reflected from the first optical system toward a subject located outside the case, away from the subject
- a second optical system that reflects the reflected light into the case, a third optical system including a plurality of prisms that refracts the light reflected from the second optical system, and an image sensor unit that detects the light refracted by the third optical system.
- the third optical system includes a first prism and a second prism configured to refract light reflected from the second optical system toward the image sensor unit, and the first prism and the second prism are spaced apart and symmetrical. placed hostilely.
- the shape of the cross section of the first prism and the second prism is a triangle.
- the positions and directions of the first prism and the second prism are refracted by the first prism and the second prism, respectively, so that a plurality of images of the subject detected by the image sensor unit do not overlap. , each phase is set to be fully visible.
- the first optical system is composed of a prism having a rhomboid shape including a first reflector and a second reflector.
- the light source unit includes a first light source unit disposed above the image sensor and a second light source unit disposed below the image sensor.
- the first reflector is configured to reflect light irradiated from the first light source unit, is disposed in a position symmetrical to the first reflector with respect to the second reflector, and is provided from the second light source unit. It further includes a third reflector configured to reflect the irradiated light, the second reflector includes two reflective surfaces that reflect light reflected by the first reflector and the third reflector toward the opening, respectively, and The rear angle between the respective reflective surfaces of the reflector is configured to form a right angle.
- the light source unit is configured to emit patterned light or structured light.
- the image sensor unit is configured to obtain a plurality of stereo images from images of light reflected from the third optical system.
- virtual center lines of the light source unit, the first optical system, the second optical system, the third optical system, and the image sensor unit projected on the plane of the case are aligned and arranged on the virtual center line projected on the plane of the case. do.
- the optical systems can be densely arranged in optimal positions inside the case.
- an intraoral scanner with a small volume can be implemented by disposing a plurality of optical systems in a dense structure inside the case, when the intraoral scanner is used, it is not only inserted into the oral cavity of a dental patient but also in the oral cavity. It is easy to move or change direction in the tooth scanning can be performed precisely.
- the manufacturing cost of the intraoral scanner is reduced and the internal configuration thereof is reduced. can be further optimized.
- FIG. 1 is a schematic diagram showing a configuration in which an oral scanner according to an embodiment of the present disclosure is connected to an oral 3D modeling and visualization system.
- FIG. 2 is a perspective perspective view of an intraoral scanner according to an embodiment of the present disclosure.
- FIG 3 is a perspective side view and a perspective plan view of an intraoral scanner according to an embodiment of the present disclosure.
- FIG. 4 is a diagram illustrating an example of a stereo image obtained according to an embodiment of the present disclosure.
- FIG. 5 is a perspective side view of an intraoral scanner according to another embodiment of the present disclosure.
- FIG. 6 is a perspective side view of an intraoral scanner according to another embodiment of the present disclosure.
- FIG. 7 is a perspective side view of an intraoral scanner according to another embodiment of the present disclosure.
- an upper portion of a figure may be referred to as a “top” or “upper side” of a configuration shown in the figure, and a lower portion thereof may be referred to as a “lower” or “lower side”.
- the portion between the upper and lower portions or the upper and lower portions of the illustrated configuration in the drawings may be referred to as “side” or “side”.
- Relative terms such as “upper” and “upper” may be used to describe relationships between components shown in the drawings, and the present disclosure is not limited by such terms.
- a direction toward an internal space of a structure may be referred to as “inside” and a direction protruding into an open external space may be referred to as “outside.”
- Relative terms such as “inner” and “outer” may be used to describe relationships between components shown in the drawings, and the present disclosure is not limited by such terms.
- references to “A and/or B” in this disclosure means A, or B, or A and B.
- 'module' or 'unit' used in the present disclosure means a software or hardware component, and the 'module' or 'unit' performs certain roles.
- 'module' or 'unit' is not meant to be limited to software or hardware.
- a 'module' or 'unit' may be configured to reside in an addressable storage medium and may be configured to reproduce one or more processors.
- 'module' or 'unit' refers to components such as software components, object-oriented software components, class components, and task components, processes, functions, properties, It may include at least one of procedures, subroutines, segments of program code, drivers, firmware, microcode, circuitry, data, databases, data structures, tables, arrays, or variables.
- the oral scanning system 100 includes an oral scanner 110 capable of scanning a three-dimensional structure inside the oral cavity of a dental patient, and an oral 3D modeling and visualization server 120 connected to the oral scanner 110 can include
- the intraoral scanner 110 may be inserted into the oral cavity of a dental patient by a dental medical staff to scan teeth in a non-contact manner to capture a plurality of two-dimensional image data.
- the oral scanner 110 may transmit a plurality of captured 2D image data to the 3D modeling and visualization server 120, or may perform 3D oral structure modeling based on the 2D image data itself.
- the intraoral scanner 110 may be connected through a network configured to communicate with the 3D modeling and visualization server 120 by wire or wirelessly.
- the network depends on the installation environment, for example, an electrical connection line such as a copper cable, a wired network such as Ethernet, a wired home network (Power Line Communication), a telephone line communication device and RS-serial communication, and a mobile communication network.
- a wireless network such as WLAN (Wireless LAN), Wi-Fi, Bluetooth, and ZigBee, or a combination thereof.
- the oral scanner 110 may transmit and receive information and/or data such as 2D image data and 3D oral structure model data with the 3D modeling and visualization server 120 .
- the intraoral scanner 110 and the 3D modeling and visualization server 120 may be physically separated as shown, but are not limited thereto.
- the intraoral scanner 110 and the 3D modeling and visualization server 120 may be integrated into one computing device.
- the 3D modeling and visualization server 120 may perform 3D oral structure modeling based on at least two pieces of 2D image data or stereo images obtained from the oral scanner 110 .
- the 3D modeling and visualization server 120 includes a processor capable of image processing and 3D modeling (eg, a CPU, GPU, AP, NPU, etc.) and 2D image data or 3D oral data. It may correspond to a computing device including a memory capable of storing structural model data.
- the 3D modeling and visualization server 120 may include a communication unit 122, a control unit 124 and a display unit 126.
- the communication unit 122 may be configured to transmit and receive information and/or data to and from the intraoral scanner 110 . Specifically, the communication unit 122 may transmit a command signal of the control unit 124 to the oral scanner 110 and may receive image information of a target oral structure from the oral scanner 110 .
- the controller 124 may control the oral scanner 110 to capture an image of a target oral structure. Specifically, the controller 124 may control at least one light source unit (eg, 220 in FIG. 2 ) installed inside the intraoral scanner 110 to radiate light toward at least one of a plurality of optical systems. In addition, the controller 124 may control the image sensor unit (eg, 260 in FIG. 2 ) installed inside the intraoral scanner 110 to detect light reflected by at least one of a plurality of optical systems. The controller 124 may control the image sensor unit to acquire at least two or more stereo images from the detected light image. The controller 124 may control the display unit 126 to display two or more stereo images received from the intraoral scanner 110. Alternatively or additionally, the control unit 124 may visualize the 3D oral structure model data calculated based on two or more stereo images and display the data on the display unit 126 .
- the controller 124 may visualize the 3D oral structure model data calculated based on two or more stereo images and display the data on the display unit 126 .
- the display unit 126 may display information and/or data transmitted from the intraoral scanner 110 or the controller 124.
- data displayed on the display unit 126 may include two stereo images or an image of a 3D oral structure model.
- the display unit 126 may include a display panel device such as an LED display, an OLED display, an LCD display, a touch display, and the like.
- the intraoral scanner 200 includes a case 210, a light source unit 220, a first optical system 230, a second optical system 240, a third optical system 250, and an image sensor unit 260. ) may be included.
- the case 210 forms the outside of the intraoral scanner 200, and has a light source unit 220, a first optical system 230, a second optical system 240, a third optical system 250 and an image sensor unit 260 therein. ) can be configured to accommodate.
- the case 210 may have a shape of a trapezoidal box extending substantially in one length direction, but is not limited thereto.
- the case 210 may be formed in a rectangular parallelepiped shape, a cylindrical shape, a streamlined shape, or any shape suitable for insertion into the oral cavity.
- the opening 212 may be formed at one end of the case 210 .
- the opening 212 may include an opening formed at one end of the case 210 .
- the opening of the opening 212 may be configured such that light generated or reflected inside the case 210 is irradiated to the outside and external light may be introduced into the case 210 .
- the opening 212 when the intraoral scanner 200 is inserted into the oral cavity, the opening 212 may be configured to be positioned at the innermost part of the oral cavity.
- the light source unit 220 may be configured to emit light toward the opening 212 , the first optical system 230 or the second optical system 240 .
- the light emitted from the light source unit 220 may correspond to patterned light or structured light.
- the light pattern may be a straight line pattern, a dot pattern, or a pattern of any shape.
- pattern light is irradiated onto an object 270 such as a tooth in an oral cavity located outside a case, a corresponding pattern may be deformed according to a 3D structure of a surface of the object 270 . Accordingly, the 3D structure of the subject 270 may be identified and modeled based on the deformation of the pattern projected on the surface of the subject 270 or the position change information of feature points.
- the light source unit 220 may be disposed inside the case 210 . Specifically, the light source unit 220 may be accommodated at the other inner end of the case 210 opposite to one end of the case 210 in which the opening 212 or the second optical system 240 is formed. For example, the light source unit 220 may be fixedly disposed above the other inner end of the case 210 . In one embodiment, the light source unit 220 may include a first light source unit (eg, 722 of FIG. 7 ) and a second light source unit (eg, 724 of FIG. 7 ).
- a first light source unit eg, 722 of FIG. 7
- a second light source unit eg, 724 of FIG. 7
- the first light source unit and the second light source unit may be disposed at the other end of the case together with the image sensor unit 260, and may be respectively fixed to the top and bottom of the other inner end of the case 210 with the image sensor unit as the center.
- the configuration of the intraoral scanner 200 including two light sources will be described later in detail with reference to FIG. 7 .
- the light source unit 220 may be disposed at one end of the case 210, but is not limited thereto.
- the light source unit 220 may be disposed at an arbitrary intermediate point between one end and the other end of the case 210 . That is, the light source unit 220 may be disposed at an arbitrary position within the case 210 to easily irradiate light toward the opening 212, the first optical system 230, or the second optical system 240.
- the first optical system 230 may be configured to reflect light emitted from the light source unit 220 toward the second optical system 240 or toward the opening 212 .
- the first optical system 230 may include a first reflector 232 and a second reflector 234 .
- the first reflector 232 may be configured to reflect the light emitted from the light source unit 220 toward the second reflector 234 .
- the first reflector 232 may be fixedly disposed on an inner upper portion of the case.
- the second reflector 234 may be configured to reflect the light reflected by the first reflector 232 toward the second optical system 240 or toward the opening 212 .
- the second reflector 234 may be spaced apart from the first reflector 232 and fixedly disposed on the inner central portion of the case 210 . That is, the light emitted from the light source unit 220 passes through the first reflector 232 and the second reflector 234 of the first optical system 230 and is reflected toward the second optical system 240 or the opening 212.
- the second optical system 240 reflects the light irradiated from the second reflector 234 of the first optical system 230 toward the subject 270, and reflects the light reflected from the subject 270 into the second reflector 234. ) or may be configured to reflect in the direction of the third optical system 250.
- the second optical system 240 may include at least one reflector.
- the second optical system 240 may be at least one mirror.
- the second optical system 240 may be disposed at or around the opening 212 .
- the second optical system 240 may be fixedly disposed on an inner surface of the opening 212 .
- the third optical system 250 may be configured to refract light emitted from the second optical system 240 .
- the third optical system 250 may refract light emitted from the second optical system 240 toward the image sensor unit 260 .
- the third optical system 250 may include a plurality of prisms for refracting light.
- the third optical system 250 may be disposed adjacent to the back surface in the opposite direction to the reflective surface of the second reflector 234 of the first optical system 230 .
- the light source unit 220 and the second optical system 240 may be fixedly disposed at both ends of the internal space of the case 210, and the first optical system 230 is disposed at an arbitrary position in the middle.
- the third optical system 250 may be fixedly disposed at a location adjacent to the first optical system 230 in a direction in which the light source unit 220 or the image sensor unit 260 is located.
- the third optical system 250 may include a first prism 252 and a second prism 254 .
- the first prism 252 and the second prism 254 may be configured to refract light reflected from the second optical system 240 and radiate it toward the image sensor unit 260 .
- the first prism and the second prism may be spaced apart and symmetrically disposed.
- the first prism 252 and the second prism 254 are projected on the plane of the case 210, the light source unit 220, the first optical system 230, the second optical system 240 and the image sensor It may be symmetrically arranged based on the imaginary center line of the portion 260 .
- cross sections of the first prism 252 and the second prism 254 may have a triangular shape, and the positions and directions of the first prism 252 and the second prism 254 are ) and the second prism 254, respectively, on the image detected by the image sensor unit 260, a plurality of images of the subject do not overlap, and each image may be set to be fully visible.
- each of the first optical system 230, the second optical system 240, or the third optical system 250 may be fixedly disposed at a predetermined position inside the case 210.
- a driving unit for adjusting angles of the first optical system 230 , the second optical system 240 , or the third optical system 250 may not be installed inside the case 210 . In this way, since there is no need to arrange other electronic or mechanical components in the area where the first optical system 230, the second optical system 240, and the third optical system 250 are disposed inside the case, components inside the case can be densely placed.
- the optimal structure of the case 210 can be designed from the dense structures of the first optical system 230, the second optical system 240, and the third optical system 250, the scanning operation in the oral cavity is free and the volume is reduced.
- a small intraoral scanner 200 may be implemented.
- the image sensor unit 260 may be configured to detect light refracted from the third optical system 250 .
- the image sensor unit 260 may be configured to acquire two stereo images from light refracted by the third optical system 250 .
- the image sensor unit 260 may acquire images of at least two lights each refracted by the first prism 252 and the second prism 254 of the third optical system 250 .
- the intraoral scanner 200 since the intraoral scanner 200 includes the third optical system 250 including the two prisms 252 and 254, at least two stereo images can be obtained with only one image sensor unit 260.
- At least two stereo images obtained from the image sensor unit 260 may be used for 3D oral structure modeling that is then executed by a processor.
- the image sensor unit 260 may be disposed on the other end of the case 210 .
- the image sensor unit 260 may be accommodated at the other inner end of the case 210 to face one end of the case 210 in which the opening 212 or the second optical system 240 is formed.
- the image sensor unit 260 may be fixedly disposed on the inner lower portion of the case 210 adjacent to the light source unit 220 .
- FIG. 3 is a perspective side view and a perspective plan view of the intraoral scanner 200 according to an embodiment of the present disclosure.
- light may be irradiated from the light source unit 220 and reflected toward the second optical system 240 by the first reflecting unit 232 and the second reflecting unit 234 of the first optical system 230. there is.
- Light reflected from the second reflector 234 may be reflected toward a subject located outside the case 210 by the second optical system 240 . In this case, light may pass through an opening formed on one side of the opening 212 .
- Light reflected from the subject may be reflected toward the first prism 252 and the second prism 254 of the third optical system 250 by the second optical system 240 .
- Light refracted by the first prism 252 and the second prism 254 may be irradiated toward the image sensor unit 260 .
- the light source unit 220 and the second optical system 240 may be fixedly disposed at both ends of the inner space of the case 210 .
- the first optical system 230 disposed at an arbitrary position in the middle, when the light reflected from the subject is reflected in the direction of the third optical system 250 by the second optical system 240, the path through which the light passes It can be placed in a non-interfering area, that is, in a blind spot. That is, the first optical system 230 may be disposed in an area that does not overlap with light incident on the third optical system 250 among light reflected from the subject.
- first prism 252 and the second prism 254 of the third optical system 250 are disposed spaced apart from each other on the rear surface of the second reflector 234, and the first prism 252 and the second prism 252
- the spaced distance between the prisms 254 may correspond to the length of the width of the second reflector 234 .
- the optical path of the first optical system 230 and the optical path of the third optical system 250 do not interfere with each other, and each of the first optical system 230 and the third optical system 250 is not an effective optical path.
- the components inside the case can be arranged more densely.
- the light source unit 220, the first optical system 230, the second optical system 240, the third optical system 250, and the image sensor unit 260 disposed inside the case 210 are arranged in axis alignment. It can be.
- virtual center lines of the light source unit 220, the first optical system 230, the second optical system 240, the third optical system 250, and the image sensor unit 260 projected on the plane of the case are (210) can be arranged aligned on the imaginary center line 280 projected on the plane.
- the image sensor unit (eg, 260 of FIG. 2 ) may be configured to detect light refracted from the third optical system (eg, 250 of FIG. 2 ).
- the image sensor unit may be configured to acquire at least two stereo images 410 from light refracted from the third optical system.
- the image sensor unit may acquire at least two stereo images each refracted by the first prism and the second prism (eg, 252 and 254 of FIG. 2 ) of the third optical system.
- the processor may extract depth data and perform 3D modeling of the oral cavity structure, which is a subject, based on the extracted depth data.
- the image sensor unit may be configured to acquire two or more stereo images from light refracted from the third optical system.
- the light source unit 520 may be configured to emit light toward the opening 512 or the first optical system 530 .
- the light source unit 520 may be accommodated at the other inner end of the case 510 opposite to one end of the case 510 in which the opening 512 or the second optical system 540 is formed.
- the light source unit 520 may be fixedly disposed below the other inner end of the case 510 .
- the first optical system 530 through the first reflector 532 and the second reflector 534, the light irradiated from the light source unit 520 through the aperture 512 or the second optical system 540 ) direction.
- the first reflector 532 fixedly disposed on the inner lower portion of the case 510 may be configured to reflect the light emitted from the light source unit 520 toward the second reflector 534 .
- the second reflector 534 may be configured to reflect the light reflected by the first reflector 532 toward the opening 512 or the second optical system 540 .
- the second reflector 534 and the first reflector 532 may be spaced apart from each other and fixedly disposed on the inner central portion of the case 510 .
- Light reflected from the second reflector 534 may be reflected toward a subject outside the case by the second optical system 540 .
- light may pass through an opening formed on one side of the opening 512 .
- the light reflected from the subject may be reflected back toward the third optical system 550 by the second optical system 540 .
- Light refracted by the third optical system 550 may be reflected toward the image sensor unit 560 .
- the third optical system 550 may include the same configuration as the third optical system 250 shown in FIG. 2 .
- the light source unit 520 and the second optical system 540 may be fixedly disposed at both ends of the inner space of the case 510, respectively.
- the first optical system 530 disposed at an arbitrary position in the middle determines the path through which the light passes when the light reflected from the subject is reflected in the direction of the third optical system 550 by the second optical system 540. It can be placed in a non-interfering area, that is, in a blind spot.
- the light source unit 620 may be configured to emit light toward the opening 612 or the first optical system 630 .
- the light source unit 620 may be accommodated at the other inner end of the case 610 opposite to one end of the case 610 in which the opening 612 or the second optical system 640 is formed.
- the light source unit 620 may be fixedly disposed above the other inner end of the case 610 .
- the light source unit 620 may be fixedly disposed below the other inner end of the case 610 .
- the first reflector 632 and the second reflector 634 of the first optical system 630 may be disposed as shown in FIG. 5 .
- the first optical system 630 may include a prism having a rhomboid shape including a first reflector 632 and a second reflector 634 .
- first reflector 632 of the prism may be configured to reflect the light emitted from the light source unit 620 toward the second reflector 634 .
- the second reflector 634 may be configured to reflect the light reflected by the first reflector 632 toward the opening 612 or the second optical system 640 . That is, light emitted from the light source unit 620 may be reflected toward the second optical system 640 or the opening 612 through the rhomboidal prism of the first optical system 630 .
- the light reflected from the second reflector 634 of the rectangular prism may be reflected toward the subject by the second optical system 640 .
- light may pass through an opening formed on one side of the opening 612 .
- the light reflected from the subject may be reflected back toward the third optical system 650 by the second optical system 640 .
- Light refracted by the third optical system 650 may be reflected toward the image sensor unit 660 .
- the third optical system 650 may include the same configuration as the third optical system 250 shown in FIG. 2 .
- the light source unit 620 and the second optical system 640 may be fixedly disposed at both ends of the inner space of the case 610, respectively.
- the rhomboidal prism which is the first optical system 630 disposed at an arbitrary position in the middle, when the light reflected from the subject is reflected in the direction of the third optical system 650 by the second optical system 640 , it can be placed in an area that does not interfere with the path through which light passes, that is, in a blind spot.
- the light source unit 720 may be configured to emit light toward the opening 712 or the first optical system 730 .
- the light source unit 720 may include a first light source unit 722 and a second light source unit 724 .
- One of the lights emitted from the first light source unit 722 and the second light source unit 724 may correspond to patterned light or structured light, and the other light may correspond to general light without a pattern.
- the first light source unit 722 and the second light source unit 724 may be configured to alternately emit light during a predetermined time interval.
- first light source unit 722 and the second light source unit 724 are disposed along with the image sensor unit 760 at the other end opposite to the one end where the opening 712 of the case is installed, centering on the image sensor unit 760. It may be symmetrically fixed to the top and bottom of the other inner end of the case 710 .
- the first optical system 730 transmits light emitted from the light source unit 720 through the first reflector 732, the second reflector 734, and the third reflector 736 to the opening 712. It can be configured to reflect in a direction. That is, the first reflector 732 and the third reflector 736 may be configured to reflect light emitted from the light source unit 720 toward the second reflector 734 .
- the first reflector 732 may be fixedly disposed on an inner upper portion of the case, and the third reflector 736 may be fixedly disposed on an inner lower portion of the case.
- the second reflector 734 reflects the light reflected by the first reflector 732 and the third reflector 736 toward the opening 712 or the second optical system 740, respectively.
- the back angle between the respective reflective surfaces of the second reflector 734 may be configured to form a right angle.
- the second reflector 734 may be spaced apart from the first reflector 732 and the third reflector 736 and fixedly disposed on the inner central portion of the case 710 . That is, the light irradiated from the light source unit 720 passes through the first reflector 732, the third reflector 736, and the second reflector 734 of the first optical system 730 and enters the opening 712 or the second reflector 734. It may be reflected in the direction of the optical system 740 .
- the light reflected from the second reflector 734 may be reflected toward the subject by the second optical system 740 .
- light may pass through an opening formed on one side of the opening 712 .
- Light reflected from a subject located outside the case may be reflected back toward the third optical system 750 by the second optical system 740 .
- Light refracted by the third optical system 750 may be reflected toward the image sensor unit 760 .
- the third optical system 750 may include the same configuration as the third optical system 250 shown in FIG. 2 .
- the light source unit 720 and the second optical system 740 may be fixedly disposed at both ends of the inner space of the case 710, respectively.
- the first optical system 730 disposed at an arbitrary position in the middle determines the path through which the light passes when the light reflected from the subject is reflected in the direction of the third optical system 750 by the second optical system 740. It can be placed in a non-interfering area, that is, in a blind spot. That is, the first optical system 730 may be disposed in an area that does not overlap with light incident on the third optical system 750 among light reflected from the subject.
- the first prism and the second prism for example, 252 and 254 of FIG.
- the third optical system 750 are disposed spaced apart from each other on the rear surface of the second reflector 734, and the first prism
- the spaced distance between the second prisms may correspond to the width of the second reflector 734 .
- the optical path of the first optical system 730 and the optical path of the third optical system 750 do not interfere with each other, and each of the first optical system 730 and the third optical system 750 is not an effective optical path.
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Abstract
Description
Claims (10)
- 구강 스캐너로서,일단에 개구부가 형성된 케이스;상기 케이스의 내부에 배치되며, 광을 조사하는 광원부;상기 광원부로부터 조사된 광을 반사하도록 구성되는 제1 반사부, 및 상기 제1 반사부에 의해 반사된 광을 상기 개구부 방향으로 반사하도록 구성되는 제2 반사부를 포함하는 제1 광학계;상기 개구부에 배치되고, 상기 제1 광학계로부터 반사된 광을 상기 케이스의 외부에 위치한 피사체 방향으로 반사시키고, 상기 피사체로부터 반사되는 광을 상기 케이스의 내부로 반사시키는 제2 광학계;상기 제2 광학계로부터 반사된 광을 굴절시키는 복수의 프리즘을 포함하는 제3 광학계; 및상기 제3 광학계에 의해 굴절된 광을 검출하는 이미지 센서부를 포함하는, 구강 스캐너.
- 제1항에 있어서,상기 제3 광학계는,상기 제2 광학계로부터 반사된 광을 상기 이미지 센서부 방향으로 굴절되도록 구성되는 제1 프리즘 및 제2 프리즘을 포함하고,상기 제1 프리즘 및 상기 제2 프리즘은 이격되어 대칭적으로 배치되는, 구강 스캐너.
- 제2항에 있어서,상기 제1 프리즘 및 상기 제2 프리즘의 단면의 형태는 삼각형인, 구강 스캐너.
- 제2항에 있어서,상기 제1 프리즘 및 상기 제2 프리즘의 위치 및 방향은, 상기 제1 프리즘 및 상기 제2 프리즘에 의해 각각 굴절되어 상기 이미지 센서부에 의해 검출되는 상기 피사체의 복수 개의 상(image)이 겹쳐지지 않고, 각각의 상이 전부 보이도록 설정되는, 구강 스캐너.
- 제1항에 있어서,상기 제1 광학계는 상기 제1 반사부와 상기 제2 반사부를 포함하는 장사방형(rhomboid) 형태의 프리즘으로 구성되는, 구강 스캐너.
- 제1항에 있어서,상기 광원부는,상기 이미지 센서를 중심으로 상부에 배치되는 제1 광원부; 및상기 이미지 센서를 중심으로 하부에 배치되는 제2 광원부를 포함하는, 구강 스캐너.
- 제6항에 있어서,상기 제1 광학계는,상기 제1 반사부는 상기 제1 광원부로부터 조사된 광을 반사하도록 구성되고,상기 제2 반사부를 중심으로 상기 제1 반사부와 대칭되는 위치에 배치되며, 상기 제2 광원부로부터 조사된 광을 반사하도록 구성된 제3 반사부를 더 포함하며,상기 제2 반사부는 상기 제1 반사부 및 상기 제3 반사부에 의해 반사된 광을 각각 상기 개구부 방향으로 반사하는 2개의 반사면을 포함하고, 상기 제2 반사부의 각각의 반사면 간의 이면각은 우각을 이루도록 구성되는, 구강 스캐너.
- 제1항에 있어서,상기 광원부는 패턴광 또는 구조광을 조사하도록 구성되는, 구강 스캐너.
- 제1항에 있어서,상기 이미지 센서부는, 상기 제3 광학계로부터 반사된 광의 이미지로부터 복수 개의 스테레오 이미지를 획득하도록 구성되는, 구강 스캐너.
- 제1항에 있어서,상기 케이스의 평면 상에 투영된, 상기 광원부, 상기 제1 광학계, 상기 제2 광학계, 상기 제3 광학계 및 상기 이미지 센서부의 가상의 중심선은 상기 케이스의 평면 상에 투영된 가상의 중심선 상에 정렬되어 배치되는, 구강 스캐너.
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EP22887737.9A EP4424272A1 (en) | 2021-10-29 | 2022-10-31 | Intraoral scanner |
CN202280071147.2A CN118159220A (zh) | 2021-10-29 | 2022-10-31 | 口内扫描仪 |
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KR20210146626 | 2021-10-29 | ||
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KR1020220141639A KR20230062442A (ko) | 2021-10-29 | 2022-10-28 | 구강 스캐너 |
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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US20130236850A1 (en) * | 2010-10-29 | 2013-09-12 | Shenzhen University | Intra-oral scanner for digital impression and real-time reconstruction system for inner surface topographic image of oral cavity |
KR101533341B1 (ko) * | 2014-03-04 | 2015-07-03 | 이태경 | 휴대형 스캐너 |
KR101611415B1 (ko) * | 2014-03-25 | 2016-04-12 | (주) 스틱옵틱스 | 3차원 스캐너 |
KR101662566B1 (ko) * | 2015-05-20 | 2016-10-05 | 주식회사바텍 | 광학부 교환에 의해 스캔 영역과 정밀도 변경이 가능한 구강스캐너 |
KR20180024477A (ko) * | 2016-08-30 | 2018-03-08 | 울산대학교 산학협력단 | 구강용 스캐너 |
-
2022
- 2022-10-31 EP EP22887737.9A patent/EP4424272A1/en active Pending
- 2022-10-31 WO PCT/KR2022/016813 patent/WO2023075543A1/ko active Application Filing
Patent Citations (5)
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US20130236850A1 (en) * | 2010-10-29 | 2013-09-12 | Shenzhen University | Intra-oral scanner for digital impression and real-time reconstruction system for inner surface topographic image of oral cavity |
KR101533341B1 (ko) * | 2014-03-04 | 2015-07-03 | 이태경 | 휴대형 스캐너 |
KR101611415B1 (ko) * | 2014-03-25 | 2016-04-12 | (주) 스틱옵틱스 | 3차원 스캐너 |
KR101662566B1 (ko) * | 2015-05-20 | 2016-10-05 | 주식회사바텍 | 광학부 교환에 의해 스캔 영역과 정밀도 변경이 가능한 구강스캐너 |
KR20180024477A (ko) * | 2016-08-30 | 2018-03-08 | 울산대학교 산학협력단 | 구강용 스캐너 |
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