JP6352896B2 - Probe and intraoral scanner - Google Patents

Description

The present invention is a probe attached to the light incident portion of the intraoral scanner, and the intraoral scanner fitted with a probe, to intraoral scanner to which the probe has been integrated.

  In the dental field, in order to digitally design a prosthesis or the like on a computer, an imaging device (oral scanner) for acquiring a three-dimensional shape of a tooth has been developed (Patent Document 1). The intraoral scanner disclosed in Patent Document 1 is a hand-held scanner that acquires a three-dimensional shape of a surface to be observed using a focusing technique. Specifically, in the scanner, light having a linear or checkered pattern (hereinafter also referred to as a pattern) is projected onto the surface of the observation target, and a focused distance is obtained from an image obtained by imaging the projected pattern. The original shape is acquired.

  Further, the scanner has a probe for imaging the oral cavity, projects a pattern onto an observation target from an opening provided in the probe, and images the projected pattern. The probe has a cylindrical casing that can be easily inserted into the oral cavity and a mirror (mirror) provided in the casing, and images a pattern projected from an opening provided in the casing.

Japanese Patent No. 5665483

  However, the inside of the oral cavity becomes narrower as it goes deeper, and the range in which the probe can be moved is limited. When the range in which the probe can be moved becomes narrow, a blind spot portion that cannot be imaged is generated. Therefore, in order to reduce the portion that becomes a blind spot for imaging, for example, when imaging the side surface of a tooth, it is necessary to insert the probe between the tooth and the cheek meat and move the probe greatly. However, if the probe inserted between the teeth and the cheek meat is moved greatly, the cheek meat may be pulled, causing pain to the patient. For example, when imaging the back side of the molar, it is necessary to insert the probe between the upper and lower back teeth and move the probe greatly. However, if the probe inserted between the upper and lower back teeth is moved greatly, the temporomandibular joint may be burdened and may cause pain to the patient.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a probe and an intraoral scanner that can reduce the burden on the patient while moving the imaging range.

A probe according to the present invention is a probe that is detachable from an intraoral scanner that acquires a three-dimensional shape in the oral cavity, and includes a housing having an opening for connecting to at least a part of the intraoral scanner , and an opening. site comprising: a lighting part provided on the housing of the opposite side, and a reflective portion for reflecting light taken from the lighting unit in the direction of the opening, the housing, the oral cavity at least a portion of the housing and It is possible to change the position of the reflecting portion by pressing against.

Preferably, the optical element provided in the reflecting portion and the daylighting portion does not have a lens effect.
Preferably, the housing is made of a flexible material that can be bent at least partially.

Preferably, at least a part of the housing is harder than the other parts of the housing.
Preferably, the housing is configured to have different flexibility depending on the position of the housing by combining a plurality of different materials.

Preferably, a housing | casing is comprised by the structure part which can bend at least one part.
Preferably, the housing is at least partially made of a thermoplastic material.

  Preferably, the housing includes a heating unit that heats a part of the housing and at least one of the reflecting unit and the daylighting unit.

  Preferably, the heating unit is a heater, and at least one of the heater, the wiring extending from the heater, and the heat transfer material extending from the heater has a slack and is fixed to at least a part of the casing.

  Preferably, the housing includes a change preventing unit that prevents a change in the position of the reflecting unit equal to or greater than a predetermined amount of change.

  Preferably, the housing is made of a material having flexibility that allows a part of the housing forming the opening to be wound outward.

Preferably, a part of the casing forming the opening has a fitting part for fitting with the intraoral scanner .

An intraoral scanner according to the present invention is an intraoral scanner equipped with a probe for acquiring a three-dimensional shape in the oral cavity, and a connection part detachably connected to the probe, and light taken from the probe connected to the connection part The probe is any one of the probes described above.

  Preferably, the size of the cross section on the side where the connection portion is connected to the probe is larger than the size of the cross section of a part of at least another portion.

An intraoral scanner having another configuration according to the present invention is an intraoral scanner that acquires a three-dimensional shape in the oral cavity, and a light incident part for capturing light and a process for processing light captured from the light incident part A light-receiving unit, a housing having an opening for entering the processing unit, a daylighting unit provided in a housing opposite to the opening, and light taken from the daylighting unit And a reflecting part that reflects in the direction of the opening, and the casing can change the position of the reflecting part by pressing at least a part of the casing against a site in the oral cavity .

Preferably, a detection unit that detects an exclusion region in which at least one of the frame of the reflection unit and the casing located outside the frame due to a change in the position of the reflection unit overlaps the effective imaging region of the intraoral scanner , and detection And an exclusion processing unit that excludes the excluded area detected by the unit from the intraoral scanner of the imaging apparatus.

Preferably, identification information is provided in at least one of the frame of the reflection unit and the casing located outside the frame, and the detection unit detects the exclusion region by identifying the identification information from the captured image of the intraoral scanner .

  Preferably, a strain sensor is provided in the housing, the strain sensor outputs strain amount information corresponding to the amount of strain generated in the housing due to a change in the position of the reflecting portion, and the detection unit is based on the strain amount information. , Detect excluded areas.

The probe according to the present invention changes the position of the reflecting portion by pressing at least a part of the housing against a site in the oral cavity without forcibly applying a force to the probe, thereby reducing the burden on the patient. The imaging range can be moved. In addition, the intraoral scanner according to the present invention changes the position of the reflection part of the probe by pressing at least a part of the housing of the probe against the intraoral site without applying force to the probe. The imaging range can be moved while reducing the burden on the patient.

It is a block diagram which shows the structure of the intraoral scanner which concerns on Embodiment 1 of this invention. It is the schematic for demonstrating the structure of the probe which concerns on Embodiment 1 of this invention. It is the schematic for demonstrating the movement in the oral cavity of the probe which concerns on Embodiment 1 of this invention. It is the schematic for demonstrating the structure of the modification of the lighting part and reflection part which concern on Embodiment 1 of this invention. It is the schematic for demonstrating the structure of the housing | casing which concerns on Embodiment 2 of this invention. It is the schematic for demonstrating the structure of the housing | casing which has a structure part which concerns on Embodiment 2 of this invention. It is the schematic for demonstrating the structure of the housing | casing which combines the some material which concerns on Embodiment 2 of this invention. It is the schematic for demonstrating the structure of the probe which provided the change prevention part which concerns on Embodiment 3 of this invention. It is the schematic for demonstrating the structure which attaches / detaches the probe which concerns on Embodiment 4 of this invention from an optical measurement part. It is the schematic for demonstrating the structure of the probe which has a heating means which concerns on Embodiment 5 of this invention. It is the schematic for demonstrating the structure of a part of intraoral scanner which concerns on Embodiment 6 of this invention. It is the schematic for demonstrating the process which excludes the sacrificial visual field in the intraoral scanner which concerns on Embodiment 7 of this invention. It is a block diagram for demonstrating the exclusion process in the control part which concerns on Embodiment 7 of this invention.

Hereinafter, embodiments according to the present invention will be described with reference to the drawings.
(Embodiment 1)
The imaging apparatus according to Embodiment 1 of the present invention is an intraoral scanner for acquiring a three-dimensional shape of teeth in the oral cavity. However, the imaging apparatus according to the present invention is not limited to an intraoral scanner, and can be applied to a three-dimensional scanner that is an imaging apparatus having a similar configuration. For example, the present invention can be applied to a three-dimensional scanner that can capture a three-dimensional shape in the outer ear by imaging the inside of a human ear other than the oral cavity.

[Configuration of intraoral scanner]
FIG. 1 is a block diagram showing a configuration of an intraoral scanner 100 according to Embodiment 1 of the present invention. An intraoral scanner 100 shown in FIG. 1 includes a probe 10, a connection unit 20, an optical measurement unit 30, a control unit 40, a display unit 50, and a power supply unit 60. The probe 10 is inserted into the oral cavity, which is the observation target 200, projects light having a pattern (hereinafter also referred to as a pattern) onto the observation target 200, and the reflected light from the observation target 200 onto which the pattern is projected is measured by the optical measuring unit 30. Leading to. In addition, since the probe 10 is detachable from the optical measurement unit 30, as a countermeasure against infection, only the probe 10 that may come into contact with the living body is detached from the optical measurement unit 30 and sterilized (for example, in a high temperature and high humidity environment). Can be applied). When the entire device of the intraoral scanner is sterilized, there are disadvantages that the life of the device is shortened because many optical parts and electronic parts are included. However, when only the probe 10 is removed and sterilized, the disadvantage does not occur. Note that in an intraoral scanner having a configuration in which the probe cannot be attached and detached, a transparent disposable cover may be attached to the probe as a countermeasure against infection, but there is a drawback in that the accuracy of an image captured by the cover is reduced. The connecting portion 20 has a shape that can be fitted with the probe 10 and is a portion protruding from the optical measuring portion 30. The connection unit 20 may have a relay lens or the like for guiding the light collected by the probe 10 to the optical measurement unit 30.

  The optical measurement unit 30 projects a pattern onto the observation target 200 via the probe 10 and images the projected pattern. Although not shown, the optical measuring unit 30 is configured to adjust an optical component and a light source for generating a pattern to be projected onto the observation target 200, a lens component for forming an image of the pattern on the surface of the observation target 200, and a lens focus. It has a focus adjustment mechanism, an image sensor for imaging the projected pattern, and the like. The optical measurement unit 30 will be described below as a configuration for acquiring a three-dimensional shape using a focusing technique, but is not limited to this configuration, and is not limited to this configuration. The confocal method, triangulation method, white interference method, stereo method The three-dimensional shape may be acquired using techniques such as photogrammetry, SLAM (Simultaneous Localization and Mapping), and optical coherence tomography (OCT). In other words, the optical measurement unit 30 can be applied to any configuration using any principle as long as it is a configuration that acquires a three-dimensional shape using an optical technique. In addition, the connection part 20 and the optical measurement part 30 comprise the handpiece for imaging the intraoral area.

  The control unit 40 controls the operation of the optical measurement unit 30 and processes the image captured by the optical measurement unit 30 to acquire a three-dimensional shape. The control unit 40 includes a CPU (Central Processing Unit) as a control center, a ROM (Read Only Memory) that stores programs and control data for operating the CPU, and a RAM (Random Access) that functions as a work area for the CPU. Memory) and an input / output interface for maintaining signal consistency with peripheral devices. Further, the control unit 40 can output the acquired three-dimensional shape to the display unit 50 and can input information such as settings of the optical measurement unit 30 with an input device (not shown). Note that at least a part of the calculation for processing the image to obtain a three-dimensional shape may be realized as software by the CPU of the control unit 40, or as hardware that performs processing separately from the CPU. May be. In addition, at least a part of the processing unit such as the CPU or hardware may be incorporated in the optical measurement unit 30. In FIG. 1, the components (30, 40, 50, 60) of the intraoral scanner 100 are depicted as being wired by cables (thick lines in the figure). Or all may be connected by radio | wireless communication. Further, if the control unit 40 is sufficiently small and light enough to be lifted with one hand, the control unit 40 and the optical measurement unit 30 may be integrated and configured as one handpiece.

  The display unit 50 is a display device for displaying the result of the three-dimensional shape of the observation target 200 obtained by the control unit 40. The display unit 50 can also be used as a display device for displaying other information such as setting information of the optical measurement unit 30, patient information, scanner activation status, instruction manual, help screen, and the like. . The power supply unit 60 is a device for supplying power for driving the optical measurement unit 30 and the control unit 40. As shown in FIG. 1, the power supply unit 60 may be provided outside the control unit 40 or may be provided inside the control unit 40. Further, a plurality of power supply units 60 may be provided so that power can be separately supplied to the control unit 40, the optical measurement unit 30, and the display unit 50.

[Probe configuration]
Next, the configuration of the probe 10 will be described in more detail. FIG. 2 is a schematic diagram for explaining the configuration of the probe 10 according to the first embodiment of the present invention. First, the configuration of the probe 10 will be described with reference to FIG. The probe 10 includes a housing 12 having an opening 11 for connection to the connection portion 20, a measurement window 13 (lighting unit) provided in the housing 12 on the opposite side of the opening 11, and a measurement window 13. A mirror 14 (reflecting part) that reflects the captured light in the direction of the opening 11 is provided. The opening 11 is an insertion part for inserting the connection part 20. As shown in FIG. 2B, the outer surface of the connection portion 20 inserted into the opening 11 is in contact with the inner surface of the housing 12, and the housing 12 and the connection portion 20 are fitted. Thereby, even if an external force is applied to the housing 12, the probe 10 is not easily detached from the connection portion 20. Further, the end of the probe 10 in which the opening 11 is formed is in contact with the optical measurement unit 30 as shown in FIG. Thereby, even if the probe 10 is pushed in the direction of the optical measurement unit 30, the probe 10 does not move further in the direction of the optical measurement unit 30.

  The casing 12 is formed of a flexible silicone resin, and can move in any of the vertical, horizontal, and twisting directions by applying an external force as shown in FIG. Note that the broken line diagram of the probe 10 shown in FIG. 2C shows a state in which the probe 10 is movable in the vertical direction. The position of the mirror 14 provided inside the housing 12 can also be changed by moving the housing 12. Note that the housing 12 does not move even when an external force is applied to the portion where the connecting portion 20 is inserted, and the portion where the connecting portion 20 is not inserted moves. Here, the cross-sectional shape of the housing 12 is not limited to a rectangle, but may be another shape such as a circle. Moreover, the material of the housing | casing 12 is not limited to a silicone resin, You may be comprised with materials (for example, FEP (fluorinated ethylene propylene), PFA (perfluoroalkoxy), etc.) which have another softness | flexibility.

  Next, a specific scene in which the casing 12 is moved by applying an external force will be described. FIG. 3 is a schematic diagram for explaining the movement of the probe 10 according to Embodiment 1 of the present invention in the oral cavity. As shown in FIG. 3, when the back side of the molar is imaged by the intraoral scanner 100, a part of the molar is a blind spot 201 and it is difficult to image. However, since the probe 10 is composed of a flexible housing 12, when the probe 10 is inserted between the upper and lower back teeth, the upper surface of the probe 10 is pressed against the upper back teeth, and the lower side in the figure. The housing 12 is bent. By bending the housing 12, the position of the mirror 14 provided inside the housing 12 is movable. By moving the position of the mirror 14, the position of the blind spot 201 becomes on the optical path passing through the lenses 21 and 22 and the image sensor 23 provided in the connection unit 20 and the optical measurement unit 30. The blind spot 201 can be imaged. In addition, since the housing | casing is comprised with the hard material, the connection part 20 and the optical measurement part 30 do not bend easily even if it presses outside. Therefore, the positional accuracy of the lenses 21 and 22 and the image sensor 23 provided in the connection unit 20 and the optical measurement unit 30 can be maintained.

  In FIG. 3, the position of the mirror 14 is indicated by the arrow B by pressing a portion of the housing 12 where the connecting portion 20 is not inserted (a portion having flexibility) against the opposing teeth in the direction of the arrow A. The direction is changed. Since the flexible housing 12 is bent, the blind spot 201 of the molar can be imaged without forcibly moving the probe 10 inserted between the upper and lower back teeth, and a burden is applied to the temporomandibular joint. There is no risk of suffering for the patient. Although not shown in the drawings, the flexible casing 12 is similarly bent when imaging the side surface of the tooth, so that the tooth 10 can be moved without greatly moving the probe 10 inserted between the tooth and the cheek meat. The blind spot can be imaged, and there is no possibility of causing pain to the patient by pulling the cheek meat.

  In FIG. 3, as an example of the operation, only the state in which the casing 12 is bent downward (in the direction of arrow B) by pressing the upper portion of the casing 12 is shown, but the present invention is not limited to this. As shown in FIG. 2C, the housing 12 can be bent in other directions. For example, the housing 12 may be configured to be bent upward by pressing the lower surface of the housing 12 against the lower teeth, or the front surface of the housing 12 on the front side of the upper teeth. The housing 12 may be configured to bend toward the back side of the paper surface by being pressed against the side surface, or the optical measurement unit 30 is twisted while pressing the lower surface of the housing 12 against the lower teeth. The body 12 may be configured to be bent in the twisting direction, or may be configured to be bent in a combination of the above directions or in all the directions. As described above, it is possible to image a blind spot portion existing in all directions.

  As described above, in the intraoral scanner 100 according to the first embodiment, the probe 10, the connection unit 20 that is detachably connected to the probe 10, and the optical that processes light taken from the probe 10 connected to the connection unit 20. A measurement unit 30 and a control unit 40 are provided. The probe 10 includes a housing 12 having an opening 11 for connection to at least a part of the connection portion 20, a measurement window 13 provided in the housing 12 on the opposite side of the opening 11, and a measurement window And a mirror 14 that reflects the light taken in from 13 in the direction of the opening 11. Furthermore, since the housing 12 changes the position of the mirror 14 by pressing at least a part of the housing 12 to the outside, the imaging range can be moved while reducing the burden on the patient.

  In particular, the housing 12 according to Embodiment 1 is formed of a flexible material (for example, silicone resin) that can be bent at least partially, and at least a part of the flexible housing 12 is formed. The position of the mirror 14 can be changed by pressing it to the outside. In addition, since the housing | casing 12 moves, but the connection part 20 is comprised with the hard material which cannot move, the position of optical components, such as a built-in lens, can be fixed, and the precision of the three-dimensional shape to acquire can be maintained highly.

[Modification]
In addition, the measurement window 13 (lighting part) shown in FIG. 2 is a hole provided in the housing 12, and the mirror 14 (reflection part) is a general mirror that reflects light. However, the measurement window 13 and the mirror 14 are examples, and are not limited thereto. FIG. 4 is a schematic diagram for explaining a configuration of a modification of the daylighting unit and the reflecting unit according to Embodiment 1 of the present invention. First, in FIG. 4A, instead of the mirror 14, a prism 14a is provided at the reflecting portion. A reflective film 14b on which silver or the like is deposited is formed on one surface of the prism 14a. Thereby, the prism 14a can reflect the light taken from the measurement window 13 by the reflective film 14b in the direction of the opening 11. In FIG. 4B, the flat glass 14 d is fitted into the measurement window 13, and the flat glass 14 e is also fitted at a position orthogonal to the longitudinal direction of the housing 12. Thereby, even when the probe 10 is inserted into the oral cavity, saliva and the like can be prevented from entering the housing 12.

  In FIG. 4B, the flat glass plates 14d and 14e are arranged so that the vertical direction of the surface of the flat glass plates 14d and 14e and the direction of the optical path coincide with each other. However, as shown in FIG. The arrangement of the flat glass plates 14d and 14e may be slightly inclined so that the vertical direction of the surface of the flat glass plates 14d and 14e does not coincide with the direction of the optical path. Accordingly, the intraoral scanner 100 does not allow the unnecessary light reflected on the surfaces of the flat glass plates 14d and 14e to enter the optical measurement unit 30, and the measurement noise due to the unnecessary light reflected on the surfaces of the flat glass plates 14d and 14e. Can be reduced. Here, the optical elements (14, 14a, 14b, 14d, and 14e) provided in the reflecting portion and the daylighting portion are openings without giving lens effects such as condensing and divergence to the light taken in from the measurement window 13. Any member that reflects in the direction of 11 may be used. For example, a flat mirror, a prism, a flat diffraction grating, a flat glass, a transparent plastic flat plate, a flat optical filter (such as a wavelength selection filter or a density filter), and a flat polarization An optical element such as an element (polarizing plate, retardation plate, polarizing splitter, etc.). If an optical element having a lens effect such as a lens or a curved mirror is used as the optical element provided in the reflecting section and the daylighting section, the optical element is also moved by bending the housing 12, and the optical element There is a possibility that the optical axis is deviated from the optical axis of the camera, the degree of aberration is greatly changed, and the accuracy of the acquired three-dimensional shape is lowered. Therefore, the accuracy of the acquired three-dimensional shape can be improved by using an optical element that does not have a lens effect as the optical element provided in the reflecting section and the daylighting section. Even when an optical element having a lens effect is used as the optical element provided in the reflecting section and the daylighting section, if the focal length of the optical element is sufficiently large, the optical element is bent by the casing 12. Even if a slight misalignment occurs, the degree of aberration does not change greatly and does not significantly affect the accuracy of the three-dimensional shape to be acquired.

  2 and 4 have been described with respect to the configuration in which the mirror 14 or the prism 14a is directly brought into contact with the inner surface of the housing 12 and fixed. However, a separate portion is provided between the housing 12 and the reflecting portion. It may be configured to be indirectly contacted via the member. For example, as will be described later, a configuration in which the housing 12 and the mirror 14 are indirectly contacted via a heater may be employed. Further, the reflecting portion does not need to be an optical element that is a separate member from the housing 12 like the mirror 14 and the prism 14a, and silver or the like is evaporated on the inner surface of the housing 12, or the inner surface of the housing 12 is mirror-finished. It may be a part of the housing 12 such as polished into a shape. Even when the reflecting portion is formed by vapor-depositing silver or the like on the inner surface of the housing 12, or by polishing the inner surface of the housing 12 into a mirror surface, the lens effect such as a lens or a curved mirror can be obtained. do not do.

(Embodiment 2)
In the probe 10 according to the first embodiment, the configuration in which all the casings 12 are formed of the same material silicone resin, and all the casings 12 have the same flexibility has been described. However, in the probe according to the second embodiment, a configuration in which at least a part of the casing is harder than other parts of the casing will be described. FIG. 5 is a schematic diagram for explaining the configuration of the housing 12 according to the second embodiment of the present invention. In the probe 10 according to the second embodiment, the same components as those of the probe 10 according to the first embodiment shown in FIG. First, in FIG. 5A, the tip end portion 12 a of the housing 12 on which the mirror 14 is provided is harder than the other portion 12 b of the housing 12. The distal end portion 12a of the housing 12 includes a mirror 14 and protects the mirror 14 from being damaged even if a patient accidentally bites the distal end portion 12a.

  Moreover, not only the front-end | tip part 12a of the housing | casing 12, but the part connected with the connection part 20 may be hardened. Specifically, in FIG. 5B, the distal end portion 12a of the housing 12 provided with the mirror 14 and the connection portion 12c of the housing 12 connected to the connection portion 20 are harder than the other portions 12b of the housing 12. It is. Since the connecting portion 12c is connected to the connecting portion 20 and is too soft, the attaching and detaching work may become complicated. The hardness of the tip portion 12a and the hardness of the connection portion 12c may be the same or different.

Next, a specific configuration for making the distal end portion 12a and the connecting portion 12c harder than the other portions 12b will be described. First, when the housing 12 is formed of a single material, the housing 12 is provided with a structure that can be bent at least partially, so that the other portion 12b other than the tip portion 12a of the housing 12 is softened. Can be considered. FIG. 6 is a schematic diagram for explaining the configuration of the housing 12 having the structure according to the second embodiment of the present invention. In FIG. 6A, the hardness of the tip portion 12a is made harder than the other portions 12b by changing the thickness of the material of the housing 12 depending on the location. That is, in the case 12, the tip portion 12a is hardened with the thickness of the material of the tip portion 12a being t ₂ and the thickness of the other portion 12b being t ₁ (<t ₂ ). On the other hand, in the case 12 shown in FIG. 6A, the structure portion 121 that can be bent to the other portion 12b is formed by making the thickness of the other portion 12b thinner than the thickness of the tip portion 12a. Can think.

  Further, in FIG. 6B, by providing a portion to be cut in a part of the housing 12, the other portion 12b other than the front end portion 12a of the housing 12 is softened, and the front end portion 12a of the housing 12 is hardened. It is. That is, the housing 12 is made of a hard material, and a plurality of through holes are provided in the other portion 12b so that a part of the housing 12 is shaved and the other portion 12b is made softer than the tip portion 12a. On the contrary, in the case 12 shown in FIG. 6B, it can be considered that the structure portion 122 that can be bent to the other portion 12b is formed by providing a plurality of through holes in the other portion 12b. . In addition, the structure part formed by scraping a part of the housing | casing 12 does not need to be a through-hole, and may be a dent hole and a cavity. The size, the number, and the arrangement density of the through holes formed in the structure portion 122 are determined in consideration of the hardness of the material used for the housing 12 and the bending amount of the housing 12.

  Furthermore, in FIG.6 (c), the hardness of the front-end | tip part 12a is made harder than the other parts 12b by making the front-end | tip part 12a of the housing | casing 12 into a rib structure or a honeycomb structure. That is, a flexible material is used for the housing 12, the rib structure 123 is formed only on the tip portion 12a, and the tip portion 12a is hardened. On the contrary, in the case 12 shown in FIG. 6C, it can be considered that a structure portion that can be bent to the other portion 12b is formed by not forming the rib structure 123 in the other portion 12b.

  Further, in FIG. 6D, by providing a bellows portion in a part of the housing 12, the other portion 12b other than the front end portion 12a of the housing 12 is softened, and the front end portion 12a of the housing 12 is hardened. It is. Conversely, in the case 12 shown in FIG. 6D, it can be considered that the structure portion 124 that can be bent to the other portion 12b is formed by providing the bellows portion in the other portion 12b. Note that a spring-like portion or the like may be provided instead of the bellows portion provided in a part of the housing 12. Moreover, when a bellows part is provided in a part of the housing 12, the shape when the housing 12 is bent by being pressed to the outside can be stored. In other words, when the bellows portion is provided in a part of the housing 12, even if the external force is removed, it does not return to its original shape in the natural state. Therefore, the housing 12 is always pressed against the outside to maintain the bent shape. There are advantages such as not having to make the operator's arm tired. Even when the bellows portion is provided as the structure portion 124, the bent shape is not memorized by adjusting the hardness and thickness of the material of the housing 12, that is, the original shape is restored to the original state. It is also possible.

  Further, in FIG. 6E, by providing a joint portion in a part of the housing 12, the other portion 12b other than the front end portion 12a of the housing 12 is softened, and the front end portion 12a of the housing 12 is hardened. It is. Conversely, in the case 12 shown in FIG. 6 (e), it can be considered that the structure portion 125 that can be bent to the other portion 12b is formed by providing the joint portion in the other portion 12b.

  Next, when the housing 12 is formed of a single material, it is conceivable that it is made of a thermoplastic material (for example, TPE (thermoplastic elastomer)). When the housing 12 is formed of a thermoplastic material, the other portion 12b is heated without heating the tip portion 12a shown in FIG. The part 12b can be softened. That is, it is possible to bend the casing 12 by applying flexibility to the other part 12b by heating and pressing at least a part of the casing 12 to the outside. The heating means for heating the housing 12 will be described later.

  Next, it is conceivable that the tip portion 12a is hardened with respect to the other portion 12b by configuring the housing 12 by combining a plurality of materials. FIG. 7 is a schematic diagram for explaining the configuration of the casing 12 in which a plurality of materials according to Embodiment 2 of the present invention are combined. In FIG. 7A, a material having a hardness that does not bend easily even when an external force is applied (for example, PSF (polysulfone), metal, etc.) is used for the tip portion 12a, and the flexibility to bend easily by applying an external force is provided. By using a material (for example, silicone resin, FEP, PFA, etc.) for the other portion 12b, the tip portion 12a is harder than the other portion 12b. That is, the housing 12 is made by joining the two materials having different hardnesses together at the broken line portion in FIG. Note that when the material having flexibility and the hard material are combined, the position of the housing 12 having the flexibility can be changed depending on the position where the materials are combined.

  Even without the joining, it is also possible to make the tip portion 12a of the housing 12 harder than the other portion 12b by combining a plurality of materials. For example, when the housing 12 is made of a photocurable resin and the housing 12 is molded by irradiating light, the light irradiation conditions (irradiation light intensity and irradiation time) are changed between the tip portion 12a and the other portion 12b. Etc.) are set so as to be gradually different from each other, after curing, the tip portion 12a and the other portion 12b are molded as resins having different degrees of molecular polymerization, have different flexibility and no joints. Is possible.

  Similarly, for example, when the housing 12 is formed of a resin that cures by mixing two liquids and the housing 12 is molded by a chemical reaction when two types of stock solutions are mixed, the tip portion 12a and the other portion 12b If the reaction conditions (mixing ratio of the stock solution, etc.) are set to be gradually different, after curing, the tip portion 12a and the other portion 12b are molded as resins having different degrees of molecular polymerization, and have different flexibility and It is possible to have a configuration without a joint.

  Further, in FIG. 7B, a material having flexibility (for example, silicone resin, FEP, PFA, etc.) that is not easily bent even when an external force is applied while using a flexible material (for example, silicone resin, FEP, PFA). For example, PSF, metal, etc.) are provided on the tip portion 12a as the built-in plate 128 so that the tip portion 12a is harder than the other portions 12b. That is, the tip portion 12a is hardened with a two-layer structure of the material of the housing 12 and the built-in plate 128. The housing 12 shown in FIG. 7B is configured to have different flexibility depending on the position of the housing 12 by providing the built-in plate 128 at the tip portion 12a. The hardness of the distal end portion 12a may be adjusted depending on the presence / absence of the built-in plate 128, the thickness and shape of the built-in plate 128, and the like. FIG. 7B shows an example in which the built-in plate 128 having a hardness that does not easily bend even when an external force is applied is disposed on the inner side of the flexible housing 12. The exterior plate having a hardness that does not easily bend even when an external force is applied may be arranged outside the casing 12 having flexibility (not shown).

  Further, in FIG. 7 (c), a material having flexibility such as a silicone resin, FEP, PFA or the like is used as the material of the housing 12, and the rod 12 does not bend easily even when an external force is applied. By incorporating a material (eg, PSF, metal, etc.) into the tip portion 12a as a built-in wire 129, the tip portion 12a is harder than the other portions 12b. The housing 12 shown in FIG. 7C is configured to have different flexibility depending on the position of the housing 12 by providing the built-in wire 129 at the distal end portion 12a. The hardness of the distal end portion 12a may be adjusted by the presence / absence of the internal wire 129, the thickness of the internal wires 129, the arrangement density, and the like.

  The housing 12 of the probe 10 according to the second embodiment may be combined with the above-described configuration (for example, the configuration described with reference to FIGS. 6 and 7). For example, while using a thermoplastic material as the material of the housing 12, the built-in plate 128 may be provided at the tip portion 12a, and the bellows portion (structure portion 124) may be provided at the other portion 12b.

  As described above, the housing 12 of the probe 10 according to the second embodiment is configured by a structural portion that can be bent at least partially, and at least a portion of the housing 12 having the structural portion is pressed to the outside. Thus, the position of the mirror 14 can be changed. Further, at least a part of the housing 12 of the probe 10 according to the second embodiment is made of a thermoplastic material, the portion of the thermoplastic housing 12 is heated, and at least a part of the housing 12 is externally provided. It is possible to change the position of the mirror 14 by pressing against. Furthermore, the housing 12 of the probe 10 according to Embodiment 2 is configured to have different flexibility depending on the position of the housing 12 by combining a plurality of different materials. Therefore, the intraoral scanner 100 using the probe 10 according to Embodiment 2 can move the imaging range while reducing the burden on the patient.

(Embodiment 3)
In the probe 10 according to Embodiment 1, it has been described that the casing 12 can be bent by applying an external force to the casing 12 having flexibility. In the probe 10 according to Embodiment 3, it will be described that the housing 12 is prevented from being excessively bent. FIG. 8 is a schematic diagram for explaining the configuration of the probe 10 provided with the change preventing unit according to the third embodiment of the present invention. The probe 10 shown in FIG. 8 is provided with a change preventing portion 15 for preventing an excessive change on the lower surface of the probe 10. In the probe 10 according to the third embodiment, the same components as those of the probe 10 according to the first embodiment shown in FIG.

  The change preventing unit 15 includes a movable unit 15a provided on the distal end side of the probe 10 and a fixed unit 15b provided on the connecting unit side. When an external force is applied and the housing 12 is bent downward in the figure, the movable portion 15a moves in the direction of the fixed portion 15b, and the movable portion 15a and the fixed portion 15b come into contact with each other. When the movable portion 15a and the fixed portion 15b come into contact with each other, the housing 12 is not bent any further. That is, the change preventing unit 15 prevents the housing 12 from changing beyond a predetermined position by stopping the movement of the movable unit 15a by the fixed unit 15b.

  If the change prevention unit 15 is not provided in the probe 10, if an external force that bends the probe 10 excessively is applied to the housing 12, plastic deformation or fatigue failure occurs in the housing 12, and the life of the probe 10 is shortened. May cause drawbacks. By providing the change prevention unit 15 in the probe 10, it is possible to avoid this drawback. Similarly, when the probe 10 is not provided with the change prevention unit 15, if the probe 10 is bent excessively, the light path reflected by the mirror 14 reaches the connection unit 20 and the optical measurement unit 30 completely on the inner surface of the probe 10. It may cause a defect that obstructs. By providing the change prevention unit 15 in the probe 10, it is possible to avoid this drawback. Further, similarly, when the probe 10 is not provided with the change prevention unit 15, in order to secure a space for inserting the probe 10 into the oral cavity, the space is expanded by pressing at least a part of the housing 12 to the outside. If the probe 10 is bent excessively, the pace may not be secured. For example, when measuring the side of a tooth, if the patient's cheek meat is spread using the probe 10 and an attempt is made to secure a space for inserting the probe between the tooth and the cheek meat, the probe 10 bends to any extent. In other words, there is a drawback that the force necessary to spread the cheek meat does not enter and the operability is lowered. By providing the change prevention unit 15 in the probe 10, it is possible to avoid this drawback.

  As described above, in the probe 10 according to the third embodiment, the change prevention unit 15 is provided in the housing 12 so as not to cause a change in the position of the mirror 14 beyond a predetermined change amount. It is possible to prevent bending. Note that the change preventing unit 15 needs to be provided in a direction in which it is desired to prevent the probe 10 from being bent excessively. For example, if it is desired to prevent the probe 10 shown in FIG. 8 from bending excessively upward in the drawing, it is necessary to provide a change preventing unit 15 for preventing excessive change on the upper surface of the probe 10. Further, in the probe 10 illustrated in FIG. 8, the example in which the change prevention unit 15 is provided on the outer surface of the housing 12 has been described, but the change prevention unit may be built in the inner surface of the housing 12 or the housing 12.

(Embodiment 4)
The probe 10 according to Embodiment 1 has been described as having a configuration that can be attached to and detached from the optical measurement unit 30 by inserting and removing the connection unit 20 into and from the opening 11. In the probe 10 according to the fourth embodiment, the connecting portion 20 is not inserted into and removed from the opening portion 11, but a part of the housing 12 that is in contact with the connecting portion 20 is made outward using the flexibility of the housing 12. The structure which can be attached or detached with respect to the optical measurement part 30 is realized by turning. FIG. 9 is a schematic diagram for explaining a configuration in which the probe according to Embodiment 4 of the present invention is attached to and detached from the optical measurement unit 30. In the probe 10 according to the fourth embodiment, the same components as those of the probe 10 according to the first embodiment shown in FIG.

  First, in FIG. 9A, a case in which a part 12 d of the case 12 is turned outward using the flexibility of the case 12 and the connection part 20 is applied to the opening of the case 12 that has been turned up. The probe 10 is attached to the connecting portion 20 by returning a part 12d of 12 to the original position. On the contrary, when removing the probe 10 from the connection part 20, the part 12d of the housing | casing 12 is turned outside, the connection part 20 is exposed, and the probe 10 is removed. Thereby, even if it is the probe 10 using the flexible material for the housing | casing 12, it becomes possible to attach or detach the said probe 10 with respect to the optical measurement part 30 easily. In particular, this is an effective method when a material such as a rubber material that has a large friction and is difficult to be removed by insertion and removal is used as the material of the housing 12.

  Further, in order to position the probe 10 to be attached to the connecting portion 20, a guide protrusion 25 may be provided on the connecting portion 20 as shown in FIG. 9B, and a guide groove 12e may be provided on the inner surface of the probe 10. By providing the guide protrusion 25 on the connection portion 20 and the guide groove 12e on the inner surface of the probe 10, the connection is always made at the position where the guide protrusion 25 and the guide groove 12e are fitted when the connection portion 20 and the probe 10 are connected. The probe 10 can be attached to the portion 20. Therefore, the position of the probe 10 attached to the connection unit 20 can be kept constant, the position of the mirror 14 is stable, and the intraoral scanner 100 can acquire a highly accurate three-dimensional shape.

  Further, by providing the guide protrusion 25 in the connecting portion 20 and the guide groove 12e on the inner surface of the probe 10, the guide groove 12e is formed in the guide protrusion 25 even when a force is applied in the direction of pulling out the probe 10 from the connecting portion 20. The catch probe 10 does not come out of the connecting portion 20. In FIG. 9B, the guide protrusion 25 is provided on the connection portion 20 and the guide groove 12 e is provided on the inner surface of the probe 10. On the contrary, the guide groove is provided on the connection portion 20 and the guide 10 is provided on the inner surface of the probe 10. A protrusion may be provided. In addition, the guide protrusion 25 and the guide groove 12e have a rectangular shape that is long in the long side direction of the probe 10. However, the guide protrusion 25 and the guide groove 12e may have other shapes such as a circular shape and a horizontally long shape, and the number of the guide protrusions 25 and the guide grooves 12e is not limited to one. Further, the guide protrusion 25 is not limited to being provided on the upper surface of the connecting portion 20 and may be provided on another surface. Similarly, the guide groove 12e is not limited to being provided on the upper inner surface of the probe 10, and may be provided on another surface.

  Moreover, the shape of the connection part 20 shown to Fig.9 (a) is prismatic shape, and the cross-sectional shape from the probe 10 side to the optical measurement part 30 side is the same cross-sectional shape. However, in the connecting portion 20a shown in FIG. 9C, when the probe 10 is mounted, the portion close to the daylighting portion (the portion on the probe 10 side) is thick and the portion reaching the optical measuring portion 30 side is thinned. That is, the connecting portion 20a has a cross-sectional shape on the probe 10 side larger than that on the optical measurement unit 30 side. The degree of freedom in moving the probe 10 in the oral cavity is greater when the connecting part 20a, which is partly thinner, is inserted into the oral cavity than when the connecting part 20 having a certain thickness is inserted into the oral cavity. The burden is high on the patient. However, a probe formed so as to follow the shape of the connecting portion 20a using a hard material having no flexibility cannot be inserted into the connecting portion 20a. If the probe is formed in accordance with the thick part of the connection part 20a so that it can be inserted into the connection part 20a, the thin part of the connection part 20a is thickened by mounting the probe, thus reducing the burden on the patient. Can not.

  As shown in FIG. 9C, by using a probe 10 having flexibility that allows a part 12d of the casing 12 to be turned outward, the probe 10 is arranged so that the casing 12 follows the shape of the connecting portion 20a. Can be attached to the connecting portion 20a. Since the size of the cross-sectional shape of the connecting portion 20a on the side connected to the probe 10 is larger than the size of the cross-sectional shape of at least some other portions, the probe 10 is mounted along the shape of the connecting portion 20a. If it can be done, it is possible to prevent the probe 10 from coming off from the connecting portion 20a. The shape of the connecting portion is not limited to the case where the cross-sectional shape on the side connected to the probe 10 is large and the cross-sectional shape on the optical measuring portion 30 side is small as in the connecting portion 20a shown in FIG. The cross-sectional shape on the side connected to 10 and the cross-sectional shape on the optical measurement unit 30 side may be large and the cross-sectional shape between them may be small.

  As described above, in the probe 10 according to the fourth embodiment, the housing 12 is made of a material having flexibility that allows the portion 12d of the housing 12 forming the opening to be turned outward. Therefore, the probe 10 can be easily attached to and detached from the optical measurement unit 30.

(Embodiment 5)
In the probe 10 according to the second embodiment, it has been described that the casing 12 is made of a thermoplastic material. In the probe 10 according to the fifth embodiment, a heating unit that heats the thermoplastic housing 12 will be described. FIG. 10 is a schematic diagram for explaining the configuration of the probe 10 having the heating means according to the fifth embodiment of the present invention. In the probe 10 according to the fifth embodiment, the same components as those of the probe 10 according to the first embodiment shown in FIG. In FIG. 10A, a heater 16 is provided between the mirror 14 and the housing 12. The heater 16 is not only provided as a defogging heater for preventing the mirror 14 from being fogged when the probe 10 is used in the oral cavity, but also when the casing 12 is made of a thermoplastic material. Are provided as heaters for warming the casing itself and ensuring the flexibility of the casing 12.

  Further, since it is assumed that the probe 10 is bent by applying an external force, the wiring 16 a extending from the heater 16 to the connection portion 20 is not fixed to the inner surface of the probe 10. That is, as shown in FIG. 10A, the wiring 16a from the heater 16 is provided with a portion not fixed to the inner surface of the probe 10, and a part of the wiring 16a is slackened. Therefore, even if the probe 10 is bent by applying an external force, the possibility that the wiring 16a is disconnected is reduced. In addition, if the housing | casing 12 is a heat insulating material, since the heat | fever which generate | occur | produces with the heater 16 can be efficiently transmitted to the mirror 14, the effect as a fogging prevention heater becomes large.

  Further, in order to efficiently heat the casing 12 made of thermoplastic material, the heater 16 is extended not only between the mirror 14 and the casing 12 but also to the inner surface of the casing 12 as shown in FIG. May be provided. Accordingly, the heater 16 can directly heat the housing 12 and heats the housing 12 until the housing 12 can be flexed by pressing the housing 12 to the outside. Becomes easier. When the heater 16 is extended to the inner surface, it is not fixed to the inner surface of the probe 10. That is, as shown in FIG. 10B, the heater 16 is provided with a portion that is not fixed to the inner surface of the probe 10, and a portion is slackened. Therefore, even if the probe 10 is bent by applying an external force, the possibility that the heater 16 is damaged is reduced.

  Further, the heating means provided in the probe 10 does not need to be a heat source that directly heats like a heater, and may be a heat transfer material 17 heated by a heater as shown in FIG. A metal material such as aluminum or copper is used for the heat transfer material 17. When the probe 10 provided with the heat transfer material 17 is connected to the connection portion 20, the heat transfer material 17 is heated by the heater 26 provided in the connection portion 20. The heat that heats the heat transfer material 17 is transferred to the housing 12 and the mirror 14 as indicated by the arrows in the drawing, and heats the housing 12 and the mirror 14. Note that the heater 26 and the heat transfer material 17 provided in the connection portion 20 may be in direct contact with each other or may not be in contact with each other as long as at least the heater 26 can heat the heat transfer material 17.

  The probe 10 provided with the heat transfer material 17 can reduce the cost by the amount not provided with the heater 16, and can extend the life by the amount not provided with the heater 16 that may be deteriorated by the sterilization process. it can. Note that instead of the heater 26 provided in the connection unit 20, a heating unit using waste heat from a CPU, a light source, a lens focus adjustment mechanism, or the like may be used. Further, the heat transfer material 17 is not all fixed to the inner surface of the probe 10. That is, as shown in FIG. 10C, the heat transfer material 17 is provided with a portion that is not fixed to the inner surface of the probe 10, and a part thereof is slack. Therefore, even if the probe 10 is bent by applying an external force, the possibility that the heat transfer material 17 is damaged is reduced.

  As shown in FIG. 10 (d), a plurality of heaters are used, and a heater 16b provided between the mirror 14 and the housing 12 and a heater 16c provided on the inner surface of the housing 12 are provided. The wiring 16a may be electrically connected. The heater 16b is mainly used for preventing the fogging of the mirror 14, and the heater 16c is mainly used for heating the casing 12. Since a plurality of heaters can be arranged only in a portion that needs to be heated, the entire probe can be heated with only one large area heater, and the power consumption can be reduced. it can.

  Note that the heater 16b used for anti-fogging and the heater 16c used for ensuring flexibility may be configured to have different heat generation amounts. Moreover, the heating target of the heater 16b may be configured to heat not the mirror 14 but the flat glass 14d described in FIGS. 4B and 4C to prevent fogging.

  Although not shown, a heat transfer material is used instead of the heater 16b and the heater 16c, and the heat transfer material provided between the mirror 14 and the housing 12 and the heat transfer material provided on the inner surface of the housing 12 are used. A heat material may be provided, each heat transfer material may be thermally connected to each other using another heat transfer material, and only a portion requiring heating may be efficiently heated.

  As described above, the probe 10 according to the fifth embodiment includes the heater 16 or the heat transfer material 17 that heats a part of the housing 12, and therefore at least of the anti-fogging of the mirror 14 and the heating of the housing 12. One becomes possible. The object that can be defrosted by the heating of the heater is not limited to the mirror 14, but a case such as vapor-depositing silver or the like on the inner surface of the housing 12, or polishing the inner surface of the housing 12 into a mirror shape. 12 may be flat glass 14d and 14e provided in the measurement window 13 (lighting unit). Further, since at least one of the heater 16, the wiring 16a extending from the heater 16, and the heat transfer material 17 extending from the heater 16 is loosened and fixed to at least a part of the housing 12, an external force is applied. Even if the probe 10 is bent, the possibility that the heater 16, the wiring 16a extending from the heater 16, and the heat transfer material 17 extending from the heater 16 are damaged can be reduced.

(Embodiment 6)
In the intraoral scanner 100 according to the first embodiment, it has been described that the probe 10 is detachable from the optical measurement unit 30 by being inserted into and removed from the connection unit 20. In the intraoral scanner according to the sixth embodiment, the probe is integrated as a part of the optical measurement unit rather than being inserted and removed from the connection unit. FIG. 11 is a schematic diagram for explaining a partial configuration of the intraoral scanner according to the sixth embodiment of the present invention.

  The intraoral scanner 300 shown in FIG. 11 shows portions corresponding to a part of the probe 10, the connection unit 20, and the optical measurement unit 30 of the intraoral scanner 100 shown in FIG. 1. Since the control unit, display unit, and power supply unit of intraoral scanner 300 have the same configuration as control unit 40, display unit 50, and power supply unit 60 of intraoral scanner 100, detailed description will not be repeated.

  In the intraoral scanner 300, an integrated probe 80 is provided as a light incident part of the optical measurement part 70 (processing part). The probe 80 includes a housing 62 having an opening 61 for entering the optical measurement unit 70, a measurement window 63 (lighting unit) provided in the housing 62 on the opposite side of the opening 61, and a measurement window. And a mirror 64 (reflecting part) that reflects the light taken in from 63 in the direction of the opening 61.

  The housing 62 is formed of a flexible material such as silicone resin, for example, and can move up and down by applying an external force as shown in a broken line diagram of FIG. Of course, the housing 62 is movable in both the left and right directions and the torsional direction (not shown). The position of the mirror 64 provided inside the housing 62 can be changed by moving the housing 62.

  The probe 80 presses the upper surface of the probe 80 against the outside (for example, teeth), and moves the position of the mirror 64 provided inside the housing 62. By moving the position of the mirror 64, the position of the blind spot to be observed is on the optical path passing through the lenses 71 and 72 and the image sensor 73 provided in the optical measurement unit 70, and the image sensor 73 images the blind spot. Is possible.

  As described above, the intraoral scanner 300 according to the sixth embodiment includes the probe 80 for capturing light, the optical measurement unit 70 for processing the light captured from the probe 80, and the control unit. That is, the probe 80 is integrated with the intraoral scanner 300. The probe 80 takes in the housing 62 having an opening 61 for entering the optical measurement unit 70, a measurement window 63 provided in the housing 62 on the opposite side of the opening 61, and the measurement window 63. And a mirror 64 that reflects the light in the direction of the opening 61. Furthermore, since the housing 62 changes the position of the mirror 64 by pressing at least a part of the housing 62 to the outside, the imaging range can be moved while reducing the burden on the patient.

(Embodiment 7)
In the intraoral scanner 100 according to the first embodiment, the configuration in which the position of the mirror 14 is changed by pressing at least a part of the housing 12 to the outside to move the imaging range has been described. In the intraoral scanner according to the seventh embodiment, processing is performed when the frame portion of the mirror 14 or the inner surface of the housing blocks a part of the field of view of the imaging element by bending the housing by pressing the housing to the outside. explain. FIG. 12 is a schematic diagram for explaining processing for removing a sacrificial visual field in the intraoral scanner according to the seventh embodiment of the present invention. FIG. 13 is a block diagram for explaining exclusion processing in the control unit according to Embodiment 7 of the present invention. In addition, since the intraoral scanner which concerns on this Embodiment 7 uses the same structure as the intraoral scanner 100 which concerns on Embodiment 1 shown in FIG.1 and FIG.2, detailed description is not repeated using the same code | symbol.

  In FIG. 12A, in order to image the blind spot 201 of the observation target 200, the casing 12 is pressed to the outside and the casing 12 at the broken line position is bent to the casing 12 at the solid line position. It is shown in the figure. When the housing 12 is at the position of the broken line, the relationship between the mirror 14 and the field of view (effective imaging region) 23a of the image sensor 23 is the relationship shown in FIG. That is, the visual field 23a of the image sensor 23 is within the range of the reflecting surface 14g inside the frame 14f of the mirror 14. Therefore, all the images in the range of the visual field 23a can be used for the calculation of the three-dimensional shape. On the other hand, when the housing 12 is bent and is at the position of the solid line, the relationship between the mirror 14 and the visual field 23a of the image sensor 23 is the relationship shown in FIG. That is, since the frame 14f and the inner surface of the housing 12 block a part of the field of view of the image sensor 23, the field of view 23a of the image sensor 23 does not fit within the range of the reflecting surface 14g of the mirror 14, and a part of the field of view 23a and the frame 14f overlaps. Therefore, a part of the visual field 23a overlapping with the frame 14f becomes a sacrifice visual field (exclusion region) 23b from which an image of the observation target 200 cannot be obtained. This sacrificial visual field 23b becomes noise when calculating the three-dimensional shape, and there is a possibility that the accuracy of the three-dimensional shape to be acquired is lowered.

  Therefore, the control unit 40 shown in FIG. 13 calculates the three-dimensional shape by excluding the image of the sacrifice visual field 23b from the image captured by the image sensor 23. The control unit 40 excludes the sacrificial visual field 23b, a detection unit 41 that detects the sacrificial visual field 23b from the image captured by the image sensor 23, an exclusion processing unit 42 that excludes the sacrificial visual field 23b from the image captured by the image sensor 23. And a three-dimensional shape processing unit 43 that calculates a three-dimensional shape from the image. Note that the detection unit 41, the exclusion processing unit 42, and the three-dimensional shape processing unit 43 may be realized as software processed by the CPU of the control unit 40, or may be realized as hardware that performs processing separately from the CPU. Good. Moreover, at least a part of the three-dimensional shape processing unit 43 such as the CPU or hardware may be provided inside the control unit 40 or may be provided inside the optical measurement unit 30.

  The detection unit 41 detects, as an excluded image (exclusion region), a range that overlaps the region outside the frame 14f from the captured image obtained by the optical measurement unit 30. As a method for the detection unit 41 to detect the excluded image, for example, identification information that can be identified by image processing is given in advance to the frame 14f, and a range in which the identification information is reflected in the captured image is detected as an excluded image. The identification information includes, for example, a color to be applied to the frame 14f, a fluorescent material, a barcode to be attached to the frame 14f, a texture having a pattern that does not normally exist in the oral cavity, and a marking pattern with unevenness. Specifically, when coloring the frame 14f as the identification information, since the teeth and gums as the observation target 200 are often white or red, it is advantageous to paint the frame 14f with blue or green as the identification information. It is. The detection unit 41 detects a blue or green image as an excluded image from a captured image including a frame 14f painted in blue or green.

  The identification information is not limited to being provided on the frame 14f, but may be provided on the housing 12 positioned outside the frame 14f. By providing identification information on the casing 12 located outside the frame 14f, even if a part of the casing 12 is reflected in the captured image, it can be detected as an excluded image. Alternatively, the identification information may be provided only on the housing 12 positioned outside the frame 14f without providing the identification information on the frame 14f. In addition to detecting the excluded image based on the identification information, the detection unit 41 provides another sensor adjusted to focus on the portion of the frame 14f, and specifies the position of the frame 14f reflected in the captured image. Then, an excluded image may be detected. Furthermore, if the intraoral scanner is an imaging device that acquires a three-dimensional shape using a focusing technique, it can be designed so that it does not focus outside the frame 14f. Even if the frame 14f appears in the image, the focus is not achieved. Therefore, it is possible to detect the excluded image only by detecting pixels that are not in focus all over the focus range adjusted by the focus adjustment mechanism. In this case, identification information that can be identified by image processing need not be given in advance to the frame 14f.

  Next, the exclusion processing unit 42 processes the exclusion image detected by the detection unit 41 into a processed image excluded from the captured image. The three-dimensional shape processing unit 43 calculates a three-dimensional shape for the processed image processed by the exclusion processing unit 42. In order to make the size of the processed image calculated by the three-dimensional shape processing unit 43 constant, the exclusion processing unit 42 may add an image that does not affect the calculation to the part of the excluded image excluded from the captured image. Good. The result calculated by the three-dimensional shape processing unit 43 is output to the display unit 50, and the three-dimensional shape of the observation target 200 is displayed on the display unit 50.

  Here, the procedure for processing the processed image by the detection unit 41 and the exclusion processing unit 42 first and then calculating the three-dimensional shape by the three-dimensional shape processing unit 43 using the processed image has been described. May be processed in different procedures. That is, a three-dimensional shape is acquired using an unprocessed captured image first, and then an exclusion image is obtained by the detection unit 41 and the exclusion processing unit 42, and the exclusion image is converted from the previously obtained three-dimensional shape data. You may process in the procedure of excluding a corresponding coordinate point (noise).

  Up to this point, a method of using identification information as a method of detecting an excluded image has been described, but a method of using a strain sensor may be used as another method. A portion of the housing 12 that is distorted when the housing 12 is bent is provided with a strain sensor (not shown), and the strain sensor is distorted according to the amount of strain generated by bending the housing 12. Output quantity information. The detection unit 41 detects an excluded area based on the distortion amount information. For example, if the strain amount information output from the strain sensor is associated with the condition for generating the exclusion region due to bending of the housing 12, the strain output from the strain sensor while the intraoral scanner 100 is used. When the amount information satisfies a predetermined condition, the exclusion processing unit 42 is set to operate, and the exclusion processing unit 42 excludes the predetermined exclusion image from the captured image and processes the processed image in a procedure. Is possible. Thereafter, similarly, the three-dimensional shape processing unit 43 may calculate a three-dimensional shape using the processed image and display the three-dimensional shape on the display unit 50. For example, a strain gauge or an optical fiber strain sensor can be used as the strain sensor. Since the strain sensor is in the form of a sheet or a thin line, it can be incorporated in the housing 12 or laid out on the circuit of the heater 16 or the heat transfer material 17. A plurality of strain sensors may be installed inside the housing 12 so as to detect the amount of strain in each direction such as up and down, left and right, and twist. The method using the strain sensor has a larger number of parts than the method using the identification information, but does not require a calculation for complicated image processing. Therefore, the calculation load is low, which is advantageous for speeding up imaging.

  As described above, in the intraoral scanner according to Embodiment 7 of the present invention, at least one of the frame of the mirror 14 and the housing 12 positioned outside the frame 14f and the image sensor due to the change in the position of the mirror 14 23 includes a detection unit 41 that detects an excluded image that overlaps the visual field 23a of 23, and an exclusion processing unit 42 that excludes the excluded image detected by the detection unit 41 from the captured image of the image sensor 23. Accuracy can be improved. When the captured image is displayed on the display unit 50 and the user performs an operation, the exclusion processing unit 42 excludes the excluded image from the captured image and displays the image on the display unit 50, so that a mirror frame or a housing is displayed on the screen. Unnecessary things such as the inner surface of the body are not shown, and the user can concentrate on the observation object 200 and observe it, improving operability.

  In the intraoral scanner according to Embodiment 7 of the present invention, identification information is provided on at least one of the frame 14f and the casing 12 positioned outside the frame 14f, and the detection unit 41 obtains the identification information from the captured image. Since the excluded image is detected by identification, the excluded image can be easily detected. Alternatively, a strain sensor is provided in the housing 12, the strain sensor outputs strain amount information corresponding to the amount of strain generated in the housing 12 due to a change in the position of the mirror 14, and the detection unit 41 outputs from the strain sensor. When detecting an excluded image based on the distortion amount information to be performed, the calculation process of the detection unit 41 can be reduced in load, and the excluded image can be detected at high speed.

(Modification)
Although it has been described that the probe and the imaging device according to Embodiments 1 to 7 of the present invention are used for an intraoral scanner, the present invention is not limited to this. For example, for imaging devices such as intraoral cameras, optical coherence tomography (OCT), ultraviolet / infrared / terahertz imaging devices, and fluorescence imaging devices, the first to seventh embodiments of the present invention are applied. A probe and an imaging device may be used.

  In addition, the imaging target of the imaging device according to Embodiments 1 to 7 of the present invention is not limited to the teeth and gingiva in the oral cavity, but the living tissue such as the ear canal, the gap between the walls of the building, and the piping The inside or an industrial product having a cavity may be used, and the present invention can be widely applied to an application for measuring / observing a narrow space where a blind spot is easily generated.

  Further, in the probes according to Embodiments 1 to 7 of the present invention, it has been described that the housing of the probe is pressed to the outside to bend the housing to change the position of the mirror. However, the present invention is not limited to this. It is not something. For example, even if the probe housing is pressed to the outside, the housing itself does not bend, but when the probe housing is pressed to the outside, a part of the mirror exposed from the housing (for example, the back surface of the mirror) The structure may be such that only the position of the mirror is changed by pressing the rod-shaped object in contact therewith. In addition, since a part of back surface is hold | maintained at the housing | casing with the elastic body, the position of a mirror can be changed by pushing a back surface.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  10,80 probe, 11,61 opening, 12,62 housing, 13,63 measurement window, 14,64 mirror, 15 change prevention unit, 16, 16b, 16c, 26 heater, 20, 20a connection unit, 21, 22, 71, 72 Lens, 23, 73 Image sensor, 30, 70 Optical measurement unit, 40 Control unit, 41 Detection unit, 42 Exclusion processing unit, 43 Three-dimensional shape processing unit, 50 Display unit, 60 Power supply unit, 100, 300 Intraoral scanner.

Claims (18)

A probe that can be attached to and detached from an intraoral scanner to obtain a three-dimensional shape in the oral cavity ,
A housing having an opening for connecting to at least a part of the intraoral scanner ;
A daylighting portion provided in the housing opposite to the opening;
A reflection part that reflects light taken from the daylighting part in the direction of the opening,
The probe is a probe that can change a position of the reflection part by pressing at least a part of the case against a site in the oral cavity .   The probe according to claim 1, wherein the optical element provided in the reflecting portion and the optical element provided in the daylighting portion do not have a lens effect.   The probe according to claim 1 or 2, wherein the casing is made of a flexible material capable of bending at least a part thereof.   The probe according to claim 3, wherein at least a part of the casing is harder than other parts of the casing.   The probe according to claim 3 or 4, wherein the casing is configured to have different flexibility depending on a position of the casing by combining a plurality of different materials.   The probe according to any one of claims 1 to 5, wherein the casing is configured by a structure part that can be bent at least partially.   The probe according to claim 1, wherein at least a part of the casing is made of a thermoplastic material. Wherein the housing, the has a part of the housing, a heating unit for heating at least one portion of said reflecting section and the lighting unit, the probe according to 請 Motomeko 7. The heating unit is a heater,
The probe according to claim 8, wherein at least one of the heater, the wiring extending from the heater, and the heat transfer material extending from the heater is fixed to at least a part of the housing with a slack.   The probe according to any one of claims 1 to 9, wherein the casing includes a change preventing unit that prevents a change in the position of the reflecting unit that is greater than or equal to a predetermined amount of change.   The said housing | casing is comprised by the material which has a softness | flexibility which can wind a part of said housing | casing which forms the said opening part outside, The any one of Claims 1-10. Probe. The probe according to claim 11, further comprising a fitting portion for fitting with the intraoral scanner in a part of the housing forming the opening. An intraoral scanner that acquires a three-dimensional shape in the oral cavity to which a probe can be attached and detached,
A probe,
A connection part detachably connected to the probe;
A processing unit that processes light captured from the probe connected to the connection unit;
The said probe is an intraoral scanner which is a probe of any one of Claims 1-12 . The intraoral scanner according to claim 13, wherein a size of a cross section of the connection portion connected to the probe is larger than a size of a cross section of a part of at least another portion. An intraoral scanner for obtaining a three-dimensional shape in the oral cavity,
A light receiving part for capturing light;
A processing unit for processing the light taken from the light incident unit,
The light incident part is
A housing having an opening for entering the processing section;
A daylighting portion provided in the housing opposite to the opening;
A reflection part that reflects light taken from the daylighting part in the direction of the opening,
The intraoral scanner is capable of changing the position of the reflecting portion by pressing at least a part of the casing against a site in the oral cavity . A detection unit that detects an exclusion region in which at least one of the frame of the reflection unit and the casing located outside the frame overlaps with an effective imaging region of the intraoral scanner due to a change in the position of the reflection unit. When,
The intraoral scanner according to any one of claims 13 to 15, further comprising an exclusion processing unit that excludes the exclusion region detected by the detection unit from an image captured by the intraoral scanner . Providing identification information on at least one of the frame of the reflecting portion and the casing located outside the frame;
Wherein the detection unit detects the exclusion area to identify the identification information from the captured image of the intraoral scanner, intraoral scanner according to claim 16. A strain sensor is provided in the housing,
The strain sensor outputs strain amount information corresponding to the amount of strain generated in the housing due to a change in the position of the reflective portion,
The intraoral scanner according to claim 16, wherein the detection unit detects the exclusion region based on the distortion amount information.

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