JP6774365B2 - Tip member that can be attached to and detached from the image pickup device and the housing of the image pickup device. - Google Patents

Description

The present invention relates to an imaging device that images an object and a tip member that is removable from the housing of the imaging device.

In the field of dentistry, when an object (such as a tooth) in the oral cavity is imaged for the purpose of diagnostic imaging or optical impression acquisition, the tip of the imaging device is inserted into the oral cavity for imaging. For convenience of insertion into a narrow oral cavity, it is necessary to make the tip of the imaging device small enough to enter the oral cavity. Correspondingly, the optical system for imaging incorporated in the tip portion is also restricted in size, so that the imaging field of view becomes narrow. Therefore, it is difficult to capture an entire image of the oral cavity (for example, an image of the entire dentition) at one time. Therefore, a method has been developed in which individual images in the oral cavity that are continuously captured while moving the tip portion in the oral cavity are combined to generate an entire image (Patent Document 1). According to Patent Document 1, a dental camera, which is an imaging device held by hand during measurement, moves relative to a dental object such as the mandible or maxilla and images at regular time intervals. Is disclosed.

Special Table 2015-530137

As disclosed in Patent Document 1, when images in the oral cavity are continuously imaged and individual images are combined to generate an image of the entire dentition, the common images required for the composition process are common between the individual images. It must contain a characteristic structure to be used. In the oral cavity, the tooth portion having large irregularities often contains more characteristic structures than the gingival portion having less irregularities. Therefore, it is advantageous to continuously image the tooth portion containing more characteristic structures while always keeping it within the imaging field of view. That is, the operator needs to move the image pickup device along the dentition while pointing the tip of the image pickup device toward the teeth. However, there is a problem that the position of the tip portion may shift from the dentition due to the contact portion between the tip portion and the oral cavity slipping, and stable imaging cannot be performed. In addition, in order to continuously capture images in the oral cavity, for example, a directional turning motion in which the direction of the moving tip is swiveled, or along the side surface of the tooth with the maxillary teeth and the mandibular teeth meshing with each other. It is desired that the imaging device has good operability and can support various operations such as a lateral imaging (bite scan) operation for moving the tip member.

An object of the present invention is to provide an image pickup apparatus that has good operability and can perform stable imaging, and a tip member that is removable from the housing of the image pickup apparatus.

The imaging device according to the present invention is an imaging device that images an object, and is provided on a housing and a side of the tip of the housing that comes into contact with the object when imaging in the oral cavity, and is provided with light from the object. It is provided with a daylighting unit for taking in light, a detection unit provided in the housing for detecting the light taken in from the daylighting unit, and a processing unit for processing the result detected by the detection unit, and the tooth is applied to the object. Therefore, a recess was provided in the lighting section for sliding along the dentition .

The tip member that can be attached to and detached from the housing of the imaging device that images the object according to the present invention is located on the connection portion that can be connected to the housing and the side that comes into contact with the object when imaging in the oral cavity on the opposite side of the connection portion. provided, and a lighting part for taking light from the object, provided the lighting portion a recess for wants against the tooth as an object sliding along the teeth.

In the imaging device according to the present invention, an object can be applied to a recess provided on the side of the tip where the daylighting portion is provided, and continuous imaging can be performed while sliding on the object. Since the object can be applied to the recess, the position of the device is stable, and it is possible to prevent the object from moving in a direction different from the sliding direction. As a result, the imaging apparatus according to the present invention has good operability and can perform stable imaging. Further, a recess is provided on the side of the tip member that can be attached to and detached from the housing of the image pickup apparatus according to the present invention, on the side where the daylighting portion is provided. While applying the object to this depression, it is possible to slide on the object. Since the object can be applied to the recess, the position of the device is stable, and it is possible to prevent the object from moving in a direction different from the sliding direction. As a result, by using the tip member according to the present invention in the imaging device, operability is good and stable imaging can be performed.

It is a block diagram which shows the structure of the 3D scanner which concerns on Embodiment 1 of this invention. It is a schematic diagram for demonstrating the structure of the tip member which concerns on Embodiment 1 of this invention. It is the bottom view of the tip member which concerns on Embodiment 1 of this invention, and is the figure which enlarged the vicinity of the measurement window. It is an enlarged view when the depression which concerns on Embodiment 1 of this invention is seen from the front of the tip member. It is a schematic diagram which shows the state that the tip member which concerns on Embodiment 1 of this invention is applied to the upper surface of a tooth. It is a schematic diagram which shows the state that the tip member which concerns on Embodiment 1 of this invention was applied to the side surface of a tooth. It is a schematic diagram of the optical system arranged in the handpiece which concerns on Embodiment 1 of this invention. It is a figure which shows the image which the 3D scanner which concerns on Embodiment 1 of this invention took. It is a figure for demonstrating the method of synthesizing the image captured by the 3D scanner which concerns on Embodiment 1 of this invention. It is a schematic diagram for demonstrating the structure of the tip member which concerns on Embodiment 2 of this invention. It is a schematic diagram for demonstrating the structure of the tip member which concerns on Embodiment 3 of this invention. It is a schematic diagram for demonstrating the structure of the tip member which concerns on Embodiment 4 of this invention. It is a schematic diagram for demonstrating the structure of the tip member which concerns on Embodiment 5 of this invention. It is the schematic for demonstrating the structure of the handpiece which concerns on Embodiment 6 of this invention. It is the schematic for demonstrating the shape of the depression of the modification 1. FIG. It is the schematic for demonstrating the shape of the depression of the modification 2.

Hereinafter, embodiments according to the present invention will be described with reference to the drawings.
(Embodiment 1)
The imaging device according to the first embodiment of the present invention is an imaging device (three-dimensional scanner) for capturing a three-dimensional image of teeth in the oral cavity. However, the imaging device according to the present invention is not limited to the three-dimensional scanner, and can be applied to other imaging devices having the same configuration. For example, an optical interference tomography device for capturing a tomographic image of an object, a camera for capturing a two-dimensional image of an object, and a panorama of the object obtained by superimposing and synthesizing a plurality of two-dimensional images. It can also be applied to cameras for capturing images. Further, the object to be imaged by the imaging device is not limited to the teeth, and may be a living body or an artificial object having a protrusion that can be contacted by the tip portion or the tip member of the imaging device provided with a recess. For example, human or animal bones, living body types (impressions) obtained using impression materials, artificial skeleton models or biological models, other industrial products, and the like can be targeted by the imaging device.

[3D scanner configuration]
FIG. 1 is a block diagram showing a configuration of a three-dimensional scanner 100 according to a first embodiment of the present invention. The three-dimensional scanner 100 shown in FIG. 1 includes a tip member 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 tip member 10 is inserted into the oral cavity, projects light having a pattern (hereinafter, also referred to as a pattern) on the tooth 200, which is an object, and the reflected light from the tooth 200 on which the pattern is projected is projected by the optical measuring unit 30. Is leading to. Further, since the tip member 10 is removable from the optical measurement unit 30, as a countermeasure against infection, only the tip member 10 that may come into contact with the living body is removed from the optical measurement unit 30 and sterilized (for example, high temperature). It is possible to perform treatment in a high humidity environment). When the entire device of the three-dimensional scanner 100 is sterilized, there is a drawback that the life of the device is shortened because many optical parts and electronic parts are included. However, when only the tip member 10 is removed and sterilized, the drawback occurs. Absent. The connecting portion 20 has a shape that can be fitted with the tip member 10, and is a portion that protrudes from the optical measuring unit 30. The connection unit 20 has an optical component such as a lens system for guiding the light collected by the tip member 10 to the optical measurement unit 30, a cover glass, an optical filter, and a retardation plate (1/4 wave plate). May be good.

The optical measurement unit 30 projects a pattern on the tooth 200 via the tip member 10, detects and processes the reflected light from the tooth 200 on which the pattern is projected, and thereby captures a three-dimensional image of the tooth 200. Although not shown in FIG. 1, the optical measurement unit 30 forms an image of an optical component (pattern generation element), a light source, and a pattern for generating a pattern projected on the tooth 200, which is an object, on the surface of the tooth 200. It has a lens component for this purpose, a focus variable portion capable of changing the focus position (focus), and an image sensor 23 for detecting a projected pattern (see FIG. 7). The optical measurement unit 30 will be described below as a configuration for acquiring a three-dimensional shape using the principle of the focusing method, but the configuration is not limited to this configuration, and the coherence tomography method, the triangular survey method, the white interference method, and the stereo method are used. , Photogrammetry method, SLAM method (Simultaneous Localization and Mapping), Optical Coherence Tomography (OCT), and other principles may be used to acquire a three-dimensional shape. That is, although the form of the pattern (the light may not have a pattern) and the configuration of the optical component and the electronic component built in the optical measuring unit 30 differ depending on the measurement principle, the advanced member provided by the present invention Reference numeral 10 can be applied to any configuration using any principle as long as the configuration is such that a three-dimensional shape is acquired by using an optical method. The tip member 10, the connecting portion 20, and the optical measuring unit 30 form a handpiece 80 for imaging the inside of the oral cavity. Further, the image sensor 23 is, for example, an optical sensor such as a CCD image sensor or a CMOS image sensor, a sensor for detecting an interference signal between the reflected light from the tooth 200 and the reference light, and the like, and is suitable for an application. The image sensor 23 is provided in the optical measurement unit 30.

The control unit 40 controls the operation of the optical measurement unit 30 and processes the information of the reflected light from the teeth 200 detected by the optical measurement unit 30 to capture a three-dimensional image of the object. Specifically, the control unit 40 detects the reflected light from the teeth 200 as a two-dimensional element image (hereinafter, also referred to as a two-dimensional element image), and focuses the imaging of the two-dimensional element image by the focus variable unit. Repeat multiple times, changing little by little. The control unit 40 obtains one three-dimensional image by obtaining the most in-focus distance by arithmetic processing in the control unit 40 based on the obtained two-dimensional element images. Here, the three-dimensional image includes three-dimensional shape information of the tooth 200 and color information (for example, reflectance information for each color such as red, blue, and green). Further, the three-dimensional image may of course include other information such as the normal direction information of the three-dimensional texture. 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 of the CPU. Memory), input / output interfaces for maintaining signal consistency with peripheral devices, etc. are provided. Further, the control unit 40 can output the acquired three-dimensional image to the display unit 50, and can input information such as settings of the optical measurement unit 30 with an input device (not shown) or the like. It should be noted that at least a part of the calculation for processing the captured two-dimensional element image and capturing the three-dimensional image may be realized as software by the CPU of the control unit 40, or the processing is performed separately from the CPU. It may be realized as hardware. Further, at least a part of the processing units such as the CPU and hardware may be incorporated inside the optical measurement unit 30. Further, in FIG. 1, each component (30, 40, 50, 60) of the three-dimensional scanner 100 is drawn as if it is wired by a cable (thick line in the figure), but some of these wires are wired. Alternatively, all may be connected by wireless communication. Further, if the control unit 40 is sufficiently small and lightweight enough to be lifted by one hand, the control unit 40 and the optical measurement unit 30 may be integrated and configured as one handpiece 80.

The display unit 50 is a display device for displaying the imaging result of the three-dimensional image of the teeth 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. .. As an example of the display unit 50, for example, a stationary liquid crystal display, a head-mounted display, a glasses-type wearable display, or the like can be applied. Further, there may be a plurality of display units 50, and the imaging results of the three-dimensional image and other information may be configured to be simultaneously displayed or divided and displayed on the plurality of display units 50. The power supply unit 60 is a device for supplying electric 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 inside the control unit 40. Further, a plurality of power supply units 60 may be provided so as to separately supply power to the control unit 40, the optical measurement unit 30, and the display unit 50.

[Structure of tip member]
FIG. 2 is a schematic view of the configuration of the tip member 10 according to the first embodiment of the present invention. One end of the tip member 10 has a shape obtained by cutting a rectangular parallelepiped diagonally. The tip member 10 includes a housing 12 having an opening 11 for connecting to the optical measuring unit 30, a measuring window 13 (lighting unit) provided in the housing 12 on the opposite side of the opening 11, and a measuring window. A mirror 14 that reflects the light taken in from the 13 in the direction of the opening 11 is provided. Further, a recess 15 is provided on the side of the tip member 10 where the measurement window 13 is provided. More specifically, the recess 15 is provided at a position farthest from the opening 11 and adjacent to the measurement window 13. Further, the recess 15 is provided so that a gap is formed between the flat surface and the tip member 10 when the tip member 10 is installed on a flat surface with the surface on the side where the measurement window 13 is provided as the installation surface. ..

In the following, for convenience of explanation, the longitudinal direction of the tip member 10 is defined as the Y axis, and the X axis parallel to the surface provided with the measurement window 13 and perpendicular to the Y axis is defined as the Y axis and the Y axis. It is assumed that the Z axis perpendicular to the X axis is set. Further, the direction from the position where the opening 11 is provided toward the measurement window 13 is referred to as the front, the right side when the tip member 10 is viewed from the front is referred to as the right, and the left side is referred to as the left.

FIG. 3 is a bottom view of the tip member 10 according to the first embodiment of the present invention, which is an enlarged view of the vicinity of the measurement window 13. As shown in FIG. 3, the recess 15 is provided between the outer circumference of the tip member 10 and the measurement window 13. Further, the width of the recess 15 in the Y-axis direction is drawn so as to match the thickness of the housing 12 in the Y-axis direction, but the width of the recess 15 in the Y-axis direction is the Y-axis direction of the housing 12. It may be configured to be narrower than the thickness.

FIG. 4 is an enlarged view of the recess 15 according to the first embodiment of the present invention when viewed from the front of the tip member 10. As shown in FIG. 4, the recess 15 is provided so that the measurement window 13 can be seen through the recess 15 when the tip member 10 is viewed from the front. In FIG. 4, the state in which the measurement window 13 can be seen through the recess 15 is not shown. Further, the shape of the recess 15 is a shape in which the depth d of the recess is maximized near the central portion of the recess 15 and becomes an extreme value. Further, the shape of the recess 15 when viewed from the front of the tip member 10 is the maximum depth of the recess gently from the bottom surface of the tip member 10 (XY plane, that is, a plane orthogonal to the optical axis passing through the measurement window 13). It has a curved shape that reaches d and gently returns to the bottom surface of the tip member 10. The imageable range H in the Z direction of the three-dimensional scanner 100 is based on a point located in a region of the recess 15 from the position where the depth d of the recess is maximum to a position slightly inside the tip member from the position. Is set toward the outside of the tip member 10. Objects placed within the imageable range H are correctly imaged, and objects placed outside the range are not correctly imaged. The imageable range H corresponds to the adjustable width of the focus of the variable focus portion (not shown), and cannot be increased infinitely.

The angle α formed by the tangent line T in contact with the curved shape of the recess 15 and the XY plane, which is the inclination angle of the recess 15, is 45 degrees or less. That is, the recess 15 does not have a shape in which the depth changes abruptly, but has a shape in which the depth changes gently. If the angle α is too large (for example, an angle close to 90 degrees), the shape of the tip member 10 is such that the inner surface of the recess 15 sandwiches and holds the side surface of the tooth. Therefore, when continuous imaging is performed while moving the tip member 10 in the patient's oral cavity, particularly when turning in a direction, imaging is interrupted, the tip member 10 is pulled out once in the Z direction, and then the direction of the tip member 10 is reset. It takes time and effort such as having to do it. On the other hand, when the angle α is set to a shallow angle of 45 degrees or less, the holding effect is not produced and the direction turning becomes easy, so that continuous imaging can be performed without interruption. That is, the operability of the three-dimensional scanner 100 is improved. In addition, since the shape of the dent 15 is a smooth curved shape, there is a risk that a part of the dent 15 may get caught in the object during imaging and cause discomfort to the patient, as compared with the case where the dent 15 has an angular shape. Is reduced.

The shape of the inner surface of the recess 15 according to the first embodiment of the present invention is a curved surface. The shape of the recess 15 may not change along the Y-axis direction, or may change along the Y-axis direction. Specifically, the shape in which the shape of the recess 15 does not change along the Y-axis direction is a shape in which a substantially cylindrical curved surface fits in the recess 15. Further, the shape in which the shape of the recess changes along the Y-axis direction is a shape in which a substantially conical, substantially spherical, or substantially toroidal curved surface is fitted in the recess 15.

As shown in FIG. 4, the width w of the recess in the X-axis direction is larger than half of the width a in the X-axis direction of the tip member 10. That is, a relationship of a <w × 2 is established between the width w of the recess and the width a of the tip member 10 in the X-axis direction. By setting the width w of the dent sufficiently large in this way, it is possible to secure a width w of the dent sufficient to bring the dent 15 into contact with the tooth 200 (the width is about 10 mm) and stabilize it. Further, by setting the width w of the dent sufficiently large, the cleaning tool and the chemical solution can easily reach the inside of the dent at the time of cleaning, which makes it more hygienic.

Further, the shape of the recess 15 is such that the maximum depth d of the recess is less than half of the width w of the recess. That is, the relationship d <w × 1/2 is established between the maximum depth d of the depression and the width w of the depression. Further, by setting the maximum depth d of the recess to be sufficiently small, it is possible to sufficiently secure the imageable range H'outside the tip member 10 from the XY plane in the imageable range H. When the occlusal surface of the tooth 200 can be imaged if the imageable range H'is not sufficiently secured, but the gingiva located far from the occlusal surface of the tooth 200 in contact with the recess 15 in the Z direction is desired to be imaged. In other imaging situations such as when it is desired to image the side surface of the tooth 200 in the bite scanning operation, the object cannot be positioned within the imageable range H, H', and the image cannot be correctly imaged. Therefore, it is necessary to set the maximum depth d of the depression to be small. Further, by setting the maximum depth d of the depression sufficiently small, the holding effect that hinders the above-mentioned directional turning operation does not occur.

FIG. 5 is a schematic view showing a state in which the tip member 10 according to the first embodiment of the present invention is applied to the upper surface of the tooth 200. Further, FIG. 6 is a schematic view showing a state in which the tip member 10 according to the first embodiment of the present invention is applied to the side surface of the tooth 200. Here, the application is to apply the tip member 10 to the tooth 200 so that the tip member 10 and the tooth 200 are in contact with each other at at least one point. As shown in FIG. 5, when the tip member 10 according to the first embodiment is applied to the upper surface of the tooth 200, the tooth 200 fits into the recess 15, and the inner side of the recess 15 and the tooth 200 are at two points (FIG. 5). Contact at the contact 201) inside. Since the inner side of the recess 15 and the tooth 200 come into contact with each other at two points, the tip member 10 is unlikely to shift in the left-right direction in the drawing with respect to the tooth 200. Therefore, by providing the recess 15 on the side of the tip member 10 where the measurement window 13 is provided, it is possible to prevent the tip member 10 from shifting from the teeth 200 during measurement, and stable imaging can be performed. Can be done. Further, since the recess 15 is only in contact with the tooth 200 at two points and does not have a shape that sandwiches the tooth 200, the tip member 10 can be shifted in the front-rear direction in the figure or swiveled in the direction while maintaining the position in the left-right direction in the figure. Since the movement becomes possible, the handpiece 80 can be moved so as to slide the upper surface of the tooth 200 along the recess 15 when the tooth 200 is continuously imaged. Therefore, by providing the recess 15 on the side of the tip member 10 where the measurement window 13 is provided, measurement can be performed without separating the tip member 10 from the teeth 200, and an image can be taken with good operability. Even when the number of the contact points is one, it is possible to take an image. For example, if the object is a narrow tooth 200 such as an anterior tooth, or if the molar tooth has a sharp structure due to individual differences of the patient, the tooth 200 is 1 for the recess 15. May contact at points. In this case, by applying a force to the tooth 200 in the substantially Z direction and pressing the tip portion 10 against the tooth 200, the tip member 10 moves to a position where the depth d of the recess is maximized (takes an extreme value). Since the position is stable, it is possible to take an image with good operability. Of course, it is also possible to take an image with the tip member 10 slightly separated from the tooth 200 without making contact.

As shown in FIG. 6, when performing a bite scan, by providing the recess 15, the non-dented portions at both ends of the recess 15 correspond to the gingiva 210. Even in such a case, the handpiece 80 can be moved so as to slide the surface of the gingiva 210 while applying a portion not recessed to the gingiva 210. Further, in the case of performing a bite scan, since the tip member 10 is sandwiched between the tooth 200 and the meat of the cheek, there is no possibility that the tip member 10 is displaced from the tooth 200 during the measurement. Here, if the value of the maximum depth d of the recess is set too large, that is, if the inner surface of the recess 15 has a shape of the tip member 10 that sandwiches and holds the side surface of the tooth 200, Since the imageable range H'shown in FIG. 4 is narrowed, the side surface of the tooth 200 to be imaged may deviate from the imageable range H, H', and correct image pickup may not be possible. Further, since the height of the tip member 10 increases according to the size of the maximum depth d, the flesh of the cheeks may be excessively pulled, causing pain to the patient. Therefore, it is preferable to set the depth d of the depression to be small.

When the tip member 10 and the gingiva 210 are brought into contact with each other, the non-dented portion of the tip member 10 corresponds to the gingiva 210. At this time, the gingiva 210 and the surface of the tip member 10 that are not recessed are in contact with each other. Since it comes into contact with the gingiva 210 on the surface, there is no risk of causing pain to the patient.

[Composite of 3D images]
A method of synthesizing a three-dimensional image executed by the three-dimensional scanner 100 according to the first embodiment of the present invention will be described with reference to FIGS. 7 to 9. FIG. 7 is a schematic view of an optical system arranged in the handpiece 80 according to the first embodiment of the present invention. FIG. 8 is a diagram showing a three-dimensional image captured by the three-dimensional scanner 100 according to the first embodiment of the present invention. FIG. 9 is a diagram for explaining a method of synthesizing a three-dimensional image captured by the three-dimensional scanner 100 according to the first embodiment of the present invention.

As shown in FIG. 7, the handpiece 80 is provided with lenses 21 and 22, which are optical elements, and an image pickup element 23 that detects and captures light. In addition to this, the handpiece 80 includes an optical component (pattern generation element) and a light source for generating a pattern to be projected on a measurement object, a focus adjustment mechanism for adjusting the focus of the lens, and a light source to a tooth 200. A beam splitter or the like that separates the light toward the image sensor 23 from the light toward the image sensor 23 is provided as needed. However, with respect to these configurations, the illustration and detailed description in FIG. 7 are omitted. Further, although an example in which the lens system is composed of two lenses 21 and 22 is shown, the number of lenses is not limited to two, and is composed of one lens or three or more lenses. May be good. Further, the optical path 24a and the optical path 24b formed by the lens system are drawn as a telecentric lens system in which the optical paths 24a and the optical paths 24b are parallel to each other in the vicinity of the image sensor 23 and the vicinity of the teeth 200. A lens like this may be used. For example, a wide-angle lens, an ultra-wide-angle lens such as a fisheye lens, or a high percent lick lens capable of simultaneously focusing on the upper surface and the side surface of an object may be used.

The image sensor 23 captures a two-dimensional element image of the tooth 200 by detecting the reflected light from the tooth 200 guided through the lenses 21 and 22. The three-dimensional scanner 100 captures one three-dimensional image 70 based on a plurality of two-dimensional element images captured while changing the focus using the variable focus unit. Here, the three-dimensional image 70 includes three-dimensional shape information of the tooth 200 and color information (for example, reflectance information of each color such as red, blue, and green). Of course, it may include other information such as the normal direction information of the 3D texture. The optical path passing through the lenses 21 and 22 includes an optical path 24a passing through specific regions 21a and 22a near the center of the lenses 21 and 22 and an optical path 24b passing through non-specific regions 21b and 22b near the outer periphery of the lenses 21 and 22. is there. Among the three-dimensional images 70 captured by the three-dimensional scanner 100 shown in FIG. 8, a specific portion 70a imaged based on the light passing through the optical path 24a and a non-specific portion 70b imaged based on the light passing through the optical path 24b are compared. Then, the non-specific portion 70b is more strongly affected by the aberration of the lens, the imperfections of the coating on the lens, the processing error of the lens, and the like, so that the quality (image quality and shape accuracy) of the three-dimensional image 70 deteriorates. Since the three-dimensional scanner 100 according to the first embodiment of the present invention takes an image while applying the recess 15 located at the center of the tip member 10 to the dentition, the tooth 200, which is an object of interest, can be imaged with good accuracy. It can be easily positioned near the center of the three-dimensional image 70 (specific portion 70a). Therefore, the accuracy of imaging is improved. Further, it is possible to improve the accuracy even when a plurality of three-dimensional images 70 are combined as described below.

The control unit 40 of the three-dimensional scanner 100 according to the first embodiment of the present invention can synthesize a plurality of three-dimensional images with each other and display them on the display unit 50 as one large three-dimensional image. Specifically, three-dimensional images taken separately while changing the position of the tip member 10 on the dentition (for example, three-dimensional images obtained by capturing a range of one or two teeth) are compared and common to both. A large combined three-dimensional image (for example, a three-dimensional image of the entire dentition) is constructed by detecting the part to be formed and superimposing the two based on the common part. The three-dimensional image composition process is performed by the control unit 40. The process of synthesizing the three-dimensional image executed by the control unit 40 will be described with reference to FIG. Here, a first three-dimensional image (hereinafter, also referred to as a first image 71) and a second three-dimensional image (hereinafter, a second image 72) having a common three-dimensional image (hereinafter, also referred to as a common image 73) are provided with each other. Consider the case where the control unit 40 synthesizes (also referred to as). The common image 73 includes a region A in which the specific portions 71a and 72a of the first image 71 and the second image 72 overlap each other, and a region C in which the non-specific portions 71b and 72b of the first image 71 and the second image 72 overlap each other. The other region B is included. The control unit 40 adjusts the position of the common three-dimensional image (three-dimensional coordinates after composition), the color of the three-dimensional image, the brightness of the three-dimensional image, and the like based only on the common image 73 of the area A. Further, the control unit 40 does not use the common image 73 of the non-specific portions 71b and 72b for the area B, but uses only the specific portions 71a and 72a to generate a three-dimensional image. The control unit 40 generates a three-dimensional image for the region C by synthesizing the first image 71 and the second image 72.

Further, when the control unit 40 specifies a common three-dimensional image, if the specific portions 71a and 72a are not common to each other, the common image of the region B in which one is the specific portion 70a and the other is the non-specific portion 70b. The position of the common three-dimensional image, the color of the three-dimensional image, the brightness of the three-dimensional image, and the like are adjusted based on 73. Further, when the control unit 40 specifies a common three-dimensional image, if all of the common three-dimensional images are three-dimensional images corresponding to the region C, the control unit 40 may not combine the three-dimensional images. Good.

That is, the control unit 40 identifies which of the captured three-dimensional images, the regions 21 and 22 of the lenses, is the region captured based on the light that has passed through, and weights each of the identified regions. Based on the information in the area of the weighted 3D image, it is determined which of the two 3D images 71 and 72 is preferentially adopted in the compositing process, and the 3D image data is synthesized. To do. By doing so, it is possible to preferentially use the information in the highly reliable region with less distortion, and it is possible to obtain a more accurate three-dimensional image.

The weighting method is not limited to the above, and a ratio such as "combining by using 70% of the information of the specific part and 30% of the information of the non-specific part" may be set. Further, in the above example, two parts, a specific part 70a (71a, 72a) and a non-specific part 70b (71b, 72b), are defined in the image and weighted, but three or more parts are weighted. It may be specified and weighted. Alternatively, weighting may be continuously set as a function such as the distance from the center of the three-dimensional image. Since the three-dimensional scanner 100 according to the first embodiment of the present invention takes an image while applying the recess 15 located at the center of the tip member 10 to the dentition, the tooth 200, which is an object of interest, can be imaged with good accuracy. It can be easily positioned near the center of the three-dimensional image 70 (specific portion 70a). Compared to other tissues such as gingiva, the dentition portion contains a large amount of shape feature information necessary for the synthesis processing of three-dimensional images. Therefore, in the three-dimensional image composition process, the process of detecting the common portion between the three-dimensional images can be accurately executed, and the accuracy of the three-dimensional image after composition is improved.

In the first embodiment of the present invention, the control unit 40 also uses the region of the non-specific portion 70b for synthesizing the three-dimensional image, but excludes the non-specific portion 70b and uses only the specific portion 70a. 3D images may be combined. By doing so, since only the information in the highly reliable region with less distortion is used, a more accurate three-dimensional image can be obtained. Since the three-dimensional scanner 100 according to the first embodiment of the present invention takes an image while applying the recess 15 located at the center of the tip member 10 to the dentition, the tooth 200, which is an object of interest, can be accurately imaged. It can be easily positioned near the center of a good three-dimensional image 70 (specific portion 70a). Therefore, even if the imaging result of the non-specific portion (non-specific portion 70b) is excluded, the dentition portion containing a large amount of shape feature information required for the image composition processing is unlikely to be excluded, so that an error or the like occurs in the composition processing. Is unlikely to occur. Further, since the synthesis is performed excluding the non-specific portion 70b, the number of data points required for processing can be reduced. As a result, the processing load required for synthesis can be reduced as compared with the case where weighting is performed for each specified region. That is, continuous imaging at high speed becomes possible. In addition, by not adopting the imaging result of the outer peripheral portion (non-specific portion 70b) of the three-dimensional image, the lens does not consider the light passing through the corresponding lens region (non-specific region 21b, 22b). It becomes possible to design. Therefore, the diameter of the lens can be reduced, and the number of correction lenses and expensive aspherical lenses required for reducing aberrations can be reduced. Further, by reducing the diameter of the lens, the diameter of the tip member 10 can also be reduced, and the tip member 10 can be miniaturized. This makes it possible to prevent the cheek meat from being excessively pulled and causing pain to the patient when a bite scan is performed. When the image data is synthesized based on the information of the weighted image region, the data of the non-specific portion 70b can also be used, so that the image data can be effectively used. As a result, the entire shape of the tooth 200 can be imaged with a small number of images, and the image can be quickly captured.

Further, by using the three-dimensional scanner 100 according to the first embodiment of the present invention, the following advantageous effects can be obtained in terms of operability as compared with the conventional three-dimensional scanner using a tip member without a dent. .. Generally, a dental three-dimensional scanner is composed of a handpiece 80, a display unit 50, a control unit 40, and the like, as shown in FIG. Further, the calculation for obtaining the three-dimensional image executed by the control unit 40 requires a certain processing time. That is, even if the measurer sees the tooth 200 displayed as the imaging result on the screen of the display unit 50 at the timing when the tip member 10 is placed on the tooth 200 in the patient's oral cavity, the tip member 10 is placed. The position of the tooth 200 being drawn does not always match the position of the tooth 200 displayed as an imaging result on the screen of the display unit 50. Therefore, when a conventional three-dimensional scanner that does not have a dent in the tip member is used and the image is continued by gazing only at the screen of the display unit without checking the inside of the patient's oral cavity, the image is displayed on the screen of the display unit. Even if the tip member appears to be placed in the correct position (center of the tooth 200), the tip member may slip sideways on the actual tooth 200, and imaging may fail. In order to prevent the above failure, the operator (dentist or the like) needs to take an image while alternately comparing the inside of the patient's oral cavity with the screen of the display unit, resulting in poor operability. On the other hand, when the three-dimensional scanner 100 according to the first embodiment of the present invention is used, the effect of providing the recess 15 in the tip member 10 is unlikely to cause an imaging failure due to the skidding. As a result, the operator can take an image while looking only at the image displayed on the display unit 50 without frequently checking the inside of the patient's oral cavity, and the operability is improved.

(Embodiment 2)
In the tip member 10 according to the first embodiment, a configuration having one recess 15 has been described. However, in the tip member 10 according to the second embodiment, a configuration having two recesses 15 will be described. FIG. 10 is a schematic view for explaining the configuration of the tip member 10 according to the second embodiment of the present invention. In the tip member 10 according to the second embodiment, detailed description will not be repeated using the same reference numerals for the same configuration as the tip member 10 according to the first embodiment shown in FIGS. 2 to 4. Further, in FIG. 10, the mirror 14 is not shown.

As shown in FIG. 10, two recesses 15 are provided on the side of the tip member 10 according to the second embodiment where the measurement window 13 is provided. Specifically, the tip member 10 according to the second embodiment is a position adjacent to the recess 15a provided at the same position as the recess 15 according to the first embodiment and the measurement window 13, and is behind the measurement window 13. It is provided with a recess 15b provided in. The recesses 15a and 15b have the same shape and the same size as the recesses 15 provided in the tip member 10 according to the first embodiment, respectively. The recess 15b is a position adjacent to the measurement window 13 and is provided in the Y-axis direction from the front to the rear.

In this way, by providing the recesses 15a and 15b in parallel like rails along the dentition and applying the teeth to both recesses, the upper surface of the tooth 200 can be slid more stably than when only the recess 15a is provided. The tip member 10 can be moved as described above. That is, the accuracy and operability of imaging are improved.

(Embodiment 3)
In the tip member 10 according to the first embodiment, a configuration having one recess 15 has been described. However, the configuration in which the tip member 10 according to the third embodiment has two recesses 15 and a step 16 is provided between the measurement window 13 and the housing 12 will be described. FIG. 11 is a schematic view for explaining the configuration of the tip member 10 according to the third embodiment of the present invention. In the tip member 10 according to the third embodiment, detailed description will not be repeated using the same reference numerals for the same configuration as the tip member 10 according to the first embodiment shown in FIGS. 2 to 4. Further, in FIG. 11, the mirror 14 is not shown.

As shown in FIG. 11, the housing 12 of the tip member 10 according to the third embodiment is provided with a step 16 from the measurement window 13. Further, the surface of the outer surface of the housing 12 provided with the measurement window 13 is an inclined surface 17. Two recesses 15 are provided on the side of the tip member 10 according to the third embodiment where the measurement window 13 is provided. Specifically, the tip member 10 according to the third embodiment includes a recess 15a provided at the same position as the recess 15 according to the first embodiment, and a recess 15c provided at the step 16. The recesses 15a and 15c have the same shape and the same size as the recesses 15 provided in the tip member 10 according to the first embodiment, respectively. The recess 15c is provided in the step 16 and is provided in the Z-axis direction. The formation of the step 16 is effective when the thickness of the housing 12 of the tip member 10 is insufficient and a sufficient depth d of the recess cannot be secured in the recess 15c.

Further, by providing the step 16 on the tip member 10, the slope 17 is formed, and the following effects are also obtained. When the tip member 10 having no inclined surface 17 is applied to the tooth 200 and the tooth 200 is fitted into the recess 15a, a gap is formed between the measurement window 13 and the upper surface of the tooth 200. Light other than the pattern may enter the optical measuring unit 30 through this gap, which may affect the imaging. Therefore, by providing the inclined surface 17, it is possible to reduce the gap generated between the measurement window 13 and the upper surface of the tooth 200. As a result, it is possible to prevent light other than the pattern from entering the optical measurement unit 30. Further, by providing the recess 15c in the step 16, the rails along the dentition are formed by the recesses 15a and 15c, so that the tip member is more stable than providing only the recess 15a so that the upper surface of the tooth 200 can be slid. You can move 10.

(Embodiment 4)
In the tip member 10 according to the first embodiment, a configuration having one recess 15 has been described. However, in the tip member 10 according to the fourth embodiment, a configuration having three recesses 15 will be described. FIG. 12 is a schematic view for explaining the configuration of the tip member 10 according to the fourth embodiment of the present invention. In the tip member 10 according to the fourth embodiment, detailed description will not be repeated using the same reference numerals for the same configuration as the tip member 10 according to the first embodiment shown in FIGS. 2 to 4. Further, in FIG. 12, the mirror 14 is not shown.

As shown in FIG. 11, three recesses 15 are provided on the side of the tip member 10 according to the fourth embodiment where the measurement window 13 is provided. Specifically, the tip member 10 according to the fourth embodiment has a recess 15a provided at the same position as the recess 15 according to the first embodiment and a position adjacent to the measurement window 13, and is left and right of the measurement window 13. It is provided with recesses 15d and 15e provided in. The recesses 15a, 15d, and 15e have the same shape and the same size as the recesses 15 provided in the tip member 10 according to the first embodiment, respectively. The recesses 15d and 15e are positions adjacent to the measurement window 13 and are provided in the Z-axis direction.

When moving the handpiece 80 in the Y-axis direction along the upper surface of the tooth 200 (for example, when imaging a molar tooth), the handpiece 80 can be moved while applying the upper surface of the tooth 200 to the recess 15a. Further, when moving the handpiece 80 in the X-axis direction along the upper surface of the tooth 200 (for example, when imaging the front tooth), the handpiece 80 can be moved while applying the upper surface of the tooth 200 to the recesses 15d and 15e. it can. As described above, the tip member 10 according to the fourth embodiment is provided with the dents 15d and 15e in addition to the dents 15a, so that it can correspond to various moving directions of the tip member 10 in the imaging of the dentition. The number of parts that can be stably imaged increases.

(Embodiment 5)
In the tip member 10 according to the first embodiment, a configuration in which only the recess 15 is provided in the tip member 10 has been described. However, in the tip member 10 according to the fifth embodiment, a configuration in which the flexible member 18 is provided in the recess 15 will be described. FIG. 13 is a schematic view for explaining the configuration of the tip member 10 according to the fifth embodiment of the present invention. In the tip member 10 according to the fifth embodiment, detailed description will not be repeated using the same reference numerals for the same configuration as the tip member 10 according to the first embodiment shown in FIGS. 2 to 4. Further, in FIG. 13, the mirror 14 is not shown.

As shown in FIG. 13, one recess 15 is provided on the side of the tip member 10 according to the fifth embodiment where the measurement window 13 is provided. The position where the recess 15 is provided, the size and shape of the recess 15 are all the same as the recess 15 provided in the tip member 10 according to the first embodiment. A flexible member 18 is provided in the recess 15 provided in the tip member 10 according to the fifth embodiment so as to fill the recess 15. The flexible member 18 may be a plastic member or an elastic member, and may be a member that deforms when an external force is applied. As the flexible member 18, for example, medical rubber (silicone rubber or fluororubber) or the like can be used. The flexible member 18 is integrated with the tip member 10 (for example, adhesively fixed), and may be sterilized together with the tip portion 10 for repeated use, or the flexible member 18 may be attached and detached from the tip portion 10. It may be a replaceable configuration. The latter is suitable when the flexible member 18 is thrown away after each use or after each use a certain number of times. In FIG. 13, one side of the flexible member 18 is drawn so as to be straight, but it may be curved. Further, if the object to be imaged is not a living body (such as an artificial biological model or an industrial product), the material of the flexible member 18 does not have to be a medical material. For example, the soft member 18 is preferably made of a soft material (sponge, felt, various fibers, etc.) so that the depression 15 does not damage the object to be contacted.

By pressing the soft member 18 against the tooth 200, the soft member 18 is deformed. Therefore, even when the soft member 18 is provided in the recess 15, since the soft member 18 is deformed, the teeth 200 can be fitted in the recess 15, and the same effect as in the case where the soft member 18 is not provided can be obtained. .. Further, by applying a member having high friction such as rubber as the soft member 18, friction is generated between the tip member 10 and the teeth 200, and it is possible to make it appropriately slippery. Therefore, the soft member 18 is provided. Compared to the case without it, the measurement can be performed more stably.

(Embodiment 6)
In the handpiece 80 according to the first embodiment, an example in which the tip member 10 is detachably provided on the optical measuring unit 30 has been described. However, in the handpiece 80 according to the sixth embodiment, a configuration in which the tip member 10 and the optical measurement unit 30 are integrated will be described. FIG. 14 is a schematic view for explaining the configuration of the handpiece 80 according to the sixth embodiment of the present invention. In the tip portion 83 according to the sixth embodiment, detailed description will not be repeated using the same reference numerals for the same configuration as the tip member 10 according to the first embodiment shown in FIGS. 2 to 4.

The handpiece 80 according to the sixth embodiment includes a housing 81, lenses 21 and 22 provided in the housing 81, and an image sensor 23. The housing 81 includes a main body 82 and a tip 83 continuously provided on the main body 82. The main body portion 82 has a function of a grip portion that the measurer has when performing a measurement.

Although the light source is not shown in FIG. 14, the light source is provided in the housing 81, and the light emitted from the light source is reflected by the teeth 200, and the reflected light is directly transmitted along the optical path 24 to the lens 21. , 22 is imaged by the image sensor 23. In FIG. 14, the number of lenses does not have to be two, and of course, a mirror or the like for folding back the direction of the optical axis may be provided. Further, although the lenses 21, 22 and the image sensor 23 are all drawn so as to be incorporated in the tip portion, some parts may be incorporated in the grip portion side.

A recess 15 is provided on the side of the tip 83 of the housing 81 where the measurement window 13 is provided. Here, the recess 15 provided in the handpiece 80 according to the sixth embodiment and the recess 15 provided in the handpiece 80 according to the first embodiment have the same shape and the same size. Further, the provided position is also a position adjacent to the measurement window 13, the position farthest from the boundary between the tip portion 83 and the main body portion 82, and is provided on the handpiece 80 according to the first embodiment. It is common with the position where the recess 15 is provided. Therefore, as with the three-dimensional scanner 100 according to the first embodiment, even when the three-dimensional scanner 100 according to the sixth embodiment is used, the operability is good and stable imaging can be performed. In particular, when imaging a measured object that does not require sterilization (for example, an artificial model that is not a living body), a structure in which the three-dimensional scanner main body 82 and the tip 83 are integrated can be applied instead of being removable. ..

(Modification example 1)
FIG. 15 is a schematic view for explaining the shape of the recess 15 of the modified example 1. The shape of the recess 15 provided in the three-dimensional scanner 100 according to the first to sixth embodiments is such that the angle α formed by the tangent line T in contact with the inner surface of the recess 15 and the XY plane is 45 degrees or less. did. However, as shown in FIG. 15, the recess 15 may include a region where the angle α formed by the tangent line T tangent to the curved shape of the recess 15 and the XY plane exceeds 45 degrees. As shown in FIG. 15, a region where the angle α formed by the tangent line T and the XY plane exceeds 45 degrees may be locally present, but if the depth d of the region is sufficiently short (for example, 1 mm or less). (B), the width w1 of the region is also shortened, and the side surface of the tooth 200 is not sandwiched and held from both sides. Therefore, the holding effect does not occur, and the directional turning motion required for imaging the dentition is not hindered.

(Modification 2)
FIG. 16 is a schematic view for explaining the shape of the recess 15 of the modified example 2. The shape of the recess 15 provided in the three-dimensional scanner 100 according to the first to sixth embodiments is assumed to be a curved surface, but the shape is not limited to a curved surface. For example, as shown in FIG. 16, it may have a planar shape. The recess 15 shown in FIG. 16 has a shape in which a triangular prism is fitted. Even in such a case, since the inner surface of the recess 15 is in contact with the target tooth 200 at two points, the same effect as that of the first to sixth embodiments can be obtained. Further, the shape of the recess 15 is not limited to the shapes of the first and second modifications, and may be a shape in which irregularities are provided on the surface of the recess 15.

(Modification 3)
In the first to fifth embodiments, the shape of the tip member 10 is not limited to the shape obtained by cutting a rectangular parallelepiped diagonally. For example, the shape of the tip member 10 may be a rectangular parallelepiped shape or a cylindrical shape. Further, the shape of the measurement window 13 is also shown as a quadrangle, but the shape is not limited to this, and may be a circular shape, an elliptical shape, a rounded quadrangle, a polygonal shape, or the like. The shape of the tip member 10 is preferably such that the side of the outer surface of the tip member 10 where the measurement window 13 is provided is substantially flat. By making the side provided with the measurement window 13 substantially flat, when the recess 15 is fitted in the tooth 200, even if the tooth 200 is removed from the recess 15, the side provided with the measurement window 13 is spherical. It is less likely to shift compared to. Further, in FIGS. 2, 10 to 13, for the sake of clarity, the tip member 10 having an angular shape (with a sharp edge portion) is shown, but the edge portion may be chamfered or filleted. Of course, it may be processed. By applying this processing, the possibility that a sharp edge comes into contact with the patient's oral cavity and causes discomfort such as pain to the patient is reduced. In addition, the risk of damage to medical gloves due to the edge being caught in the operator's hand is reduced. The shape of the mirror 14 is not limited to the rectangular shape shown in the figure, and an elliptical shape, a chamfered polygonal shape, or the like may be appropriately selected according to a modification of the shape of the tip member or the tip portion.

(Modification example 4)
In the first to sixth embodiments, it is assumed that the recess 15 is provided so that the measurement window 13 can be seen through the recess 15 when the tip member 10 is viewed from the front. However, it is not necessary to provide the recess 15 having the same size as the thickness of the housing 12, and the recess 15 smaller than the thickness of the housing 12 may be provided. Specifically, it may be a recess 15 such that the surface of the housing 12 of the housing 12 is scraped, instead of the recess 15 that penetrates the housing 12 in the thickness direction.

(Modification 5)
In the first embodiment, the image data to be synthesized by the control unit 40 is a three-dimensional image, but when the image pickup device is an optical interference tomography device, the control unit 40 synthesizes the tomographic image data. It may be. Similarly, the imaging device may be a camera that captures a two-dimensional image. In that case, the image data synthesized by the control unit 40 is a two-dimensional image. Overall data (panoramic two-dimensional image) is formed by synthesizing a plurality of two-dimensional image data.

(Modification 6)
In the second to fifth embodiments, the recesses 15a to 15e all have the same shape and size as the recesses 15 according to the first embodiment, but the recesses 15a to 15e may have different shapes, and the recesses 15a to 15e may have different shapes. Some may be common and some may be different.

(Modification 7)
In the first to sixth embodiments, the recess 15 is provided in the housing 12. However, the tip member 10 may be provided with a recess by attaching a component different from the housing 12 provided with the recess 15 to the housing 12.

(Modification 8)
Although FIG. 11 shows an example in which the step 16 is arranged only on one rear side, the step may be on another side or on a plurality of sides. That is, a structure in which one front side is a step (the direction of inclination of the inclined surface 17 is opposite) or a step may be formed on all four sides.

(Modification 9)
In the first to sixth embodiments, the image captured by the imaging device has been described as a three-dimensional image, but the present invention is not limited to this. The image captured by the image pickup apparatus may be, for example, a two-dimensional image or a tomographic image, or a combination of a three-dimensional image, a two-dimensional image, and a tomographic image. The image includes information on the normal direction of the texture, information on the physical properties of the object, information on the time of imaging, patient information, information indicating the reliability of the image data, individual information (serial number) of the imaging device and the tip member, and Other information may be included, such as calibration information and information on weighting used when compositing images. The two-dimensional image is a two-dimensional image, which may be a color image including color information or a monochrome image not including color information, and may be an infrared image, an ultraviolet image, a fluorescent image, or a multispectral image. It may be. A tomographic image is, for example, three-dimensional tomographic data including information on a portion deeper than the surface of an object. An image in which a three-dimensional image, a two-dimensional image, and a tomographic image are combined is, for example, an image in which a two-dimensional image is bonded as a texture on the surface of three-dimensional shape information or tomographic data.

It should be considered that the embodiments disclosed this time are exemplary in all respects and not restrictive. The scope of the present invention is shown by the scope of claims, not the above description, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

10 Tip member, 11 opening, 12,81 housing, 13 measurement window, 14 mirror, 15,15a, 15b, 15c, 15d, 15e dent, 16 step, 17 inclined surface, 18 flexible member, 20 connection part, 21 , 22 lens, 21a, 22a specific area, 21b, 22b non-specific area, 23 image sensor, 24, 24a, 24b optical path, 40 control unit, 50 display unit, 60 power supply unit, 70 three-dimensional image, 70a, 71a, 72a Specific part, 70b, 71b, 72b Non-specific part, 71 1st image, 72 2nd image, 73 Common image, 80 Handpiece, 82 Main body, 83 Tip, 100 3D scanner, 200 teeth, 201 contacts, 210 Ginger meat, T tangent line, w, w1 dent width, d dent depth, a tip member width.

Claims (21)

An imaging device that captures an object
With the housing
A daylighting unit provided on the side of the tip of the housing that comes into contact with the object when taking an image in the oral cavity, and a daylighting unit for taking in light from the object.
A detection unit provided in the housing and detecting light taken in from the daylighting unit,
It is provided with a processing unit that processes the result detected by the detection unit.
An imaging device provided with a recess in the daylighting section for hitting the object tooth and sliding it along the dentition . The recess includes a first recess and a second recess.
The imaging device according to claim 1, wherein the first recess and the second recess are provided on each side of the lighting portion that is perpendicular to the longitudinal direction of the tip portion. On the surface of the tip portion provided with the lighting portion, the portion provided with the lighting portion has a different position from the other portion.
The recess includes a first recess and a second recess.
The first recess and the second recess are provided on each side of the lighting portion which is perpendicular to the longitudinal direction of the tip portion.
The imaging device according to claim 1, wherein the second recess is provided at a boundary position between the portion provided with the daylighting portion and the other portion. The recess includes a first recess, a second recess and a third recess.
The first recess is provided on one side of the daylighting portion that is perpendicular to the longitudinal direction of the tip portion.
The imaging device according to claim 1, wherein the second recess and the third recess are provided on each side of the lighting portion parallel to the longitudinal direction of the tip portion. The imaging device according to claim 1, further comprising a flexible member provided so as to fill the recess. The imaging device according to any one of claims 1 , 2, 4, and 5, wherein the side of the outer surface of the tip portion provided with the lighting portion is a substantially flat surface. The imaging device according to any one of claims 1 to 6, wherein the recess is provided between the outer periphery of the outer surface of the tip portion on the side where the lighting portion is provided and the lighting portion. The imaging device according to any one of claims 1 to 7 , wherein the recess has a size capable of contacting the inner side of the recess and the object at at least two points. The relationship between the maximum depth d of the depression and the width w of the depression is
d <w × 1/2
The imaging device according to any one of claims 1 to 8 . The relationship between the width a of the tip portion at the position where the recess is provided and the width w of the recess is
a <w × 2
The imaging device according to any one of claims 1 to 9 . The imaging device according to any one of claims 1 to 10 , wherein the recess has a shape in which the depth of the recess is the maximum and the extreme value of the recess is located near the center of the recess. The imaging device according to any one of claims 1 to 11 , wherein the shape of the recess is a curved surface shape. The imaging device according to any one of claims 1 to 12 , wherein the angle formed by the surface orthogonal to the optical axis passing through the lighting unit and the tangent line in contact with the inner surface of the recess is 45 degrees or less. Claims 1 to 13 that the depth of the depression is 1 mm or less in a region where the angle formed by the surface orthogonal to the optical axis passing through the lighting unit and the tangent line in contact with the inner surface of the depression exceeds 45 degrees. The imaging apparatus according to any one of. The imaging device according to any one of claims 1 to 14 , wherein the tip portion is removable from the main body portion of the housing. When the processing unit moves the tip portion of the object to take an image, the image data having a common imaging range among a plurality of image data detected by the detection unit are used. The image pickup apparatus according to any one of claims 1 to 15 . The processing unit weights a region in the image data according to a region through which light passes in the optical element provided in the housing, and based on the information of the region in the weighted image data, the imaging range. The imaging apparatus according to claim 16 , wherein image data in which a part of the above is common is synthesized. The imaging device according to claim 17 , wherein the processing unit excludes specific information from the information of the region in the weighted image data and synthesizes image data having a common part of the imaging range. The imaging device according to any one of claims 16 to 18 , wherein the image data is three-dimensional image data. The imaging device according to any one of claims 16 to 18 , wherein the image data is three-dimensional tomographic image data. A tip member that is removable from the housing of an imaging device that images an object.
A connection part that can be connected to the housing,
It is provided on the side in contact with the object when taking an image in the oral cavity on the opposite side of the connection portion, and is provided with a daylighting unit for taking in light from the object.
A tip member provided with a recess in the daylighting portion for hitting the object tooth and sliding it along the dentition .