JP2007319620A - Measuring adaptor for endoscope and endoscope system for measurement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a measuring adaptor for an endoscope of easy operation for stereo measurement with high precision and reliability and no trouble of a user. <P>SOLUTION: The measuring adaptor 6 for an endoscope is equipped with a mounting part 6a placed at the tip 21 of an inserting part 20 having an observation window 24a of objective optical system 24 within the endoscope 2, and an observation part 6b which is placed forward from the tip surface of the objective optical system 24 under the condition of placing the mounting part 6a at the tip 21 and equipped with a mirror 8 for changing one part of the view direction of the objective optical system 24 to the direction different from the view direction. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an endoscope measurement adapter that is attached to a distal end portion of an insertion portion of an endoscope at the time of measurement of a test portion, and a measurement endoscope system including the endoscope measurement adapter. .

  Endoscopes that can perform various therapeutic treatments using a treatment instrument inserted into a treatment instrument channel by observing organs in the body cavity or the like by inserting an elongated insertion portion into the body cavity are widely used. . Also in the industrial field, industrial endoscopes are widely used for observation and inspection of internal scratches, corrosion, and the like of boilers, turbines, engines, chemical plants, and the like.

  The endoscope used as described above is an electronic endoscope (hereinafter abbreviated as an endoscope) in which an imaging element such as a CCD that photoelectrically converts an optical image into an image signal is disposed at the distal end portion of the insertion portion. ) In this endoscope, an image signal of an optical image formed on an image sensor is generated as a video signal by an image processing unit, and the video signal is output to a display device. As a result, the user can perform an examination or the like by observing an endoscopic image displayed on the screen of the display device.

  In recent years, in an industrial endoscope, it is necessary to measure the size of a wound or the like when not only observing a test object but also performing detailed observation of a scratch or a damaged part. For this reason, various measuring means that enable measurement of a test object using an endoscope have been proposed.

  For example, Japanese Patent Application Laid-Open No. 2004-33487 discloses an endoscope apparatus that can perform observation in a state in which an optical adapter attached to a distal end portion of an insertion portion is matched with adapter information of the optical adapter. ing. In this endoscope apparatus, the optical adapter identification determination unit identifies the identification unit provided in the optical adapter and determines the optical adapter, thereby identifying the optical adapter attached to the distal end of the insertion unit. Yes.

  Therefore, since the measurement operation can be performed after obtaining the determination result of whether or not the optical adapter selected by the user matches the installed optical adapter, it is possible to reliably perform stereo measurement without mistaking the optical adapter. be able to.

  However, as shown in FIG. 14, when stereo measurement of the protruding portion 110 is performed with the direct-view type endoscope 100, an objective optical system (not shown) provided in the distal end portion 101 is opposed to the distal end portion of the protruding portion 110. Let Then, an endoscope image 122 including an image of the defect portion 111 is displayed on the screen 121 of the display device 120 as shown in FIG. When performing stereo measurement of the defect portion 111 using the endoscope image 122, the width dimension W1 and the thickness dimension T1 of the defect portion are displayed substantially parallel to the screen. For this reason, highly accurate measurement can be performed about width dimension W1 and thickness dimension T1. On the other hand, there arises a problem that sufficient measurement cannot be performed with respect to the depth dimension D1 of the defect portion 111 corresponding to the depth direction of the screen.

  On the other hand, when the projection 110 is observed with the side-view type endoscope 102 shown in FIG. 16 instead of the direct-view type endoscope 100, the objective optical system 104 provided in the distal end portion 103 is used as the projection. For example, the portion 110 is opposed to the lower surface. Then, an endoscopic image 123 including an image of the defect portion 111 is displayed on the screen 121 of the display device 120 as shown in FIG. When performing stereo measurement of the defect portion 111 using the endoscopic image 123, the width dimension W2 and the depth dimension D2 of the defect portion are displayed in parallel to the screen. For this reason, highly accurate measurement can be performed about the width dimension W2 and the depth dimension D2. On the other hand, there arises a problem that sufficient measurement cannot be performed with respect to the thickness dimension T2 of the defect portion 111 that corresponds to the depth direction of the screen.

  Therefore, in order to perform stereo measurement of a defective portion with high accuracy, it is ideal to use two types, a direct-view type endoscope and a side-view type endoscope.

FIG. 14 is a diagram for explaining a state in which the defect portion of the projection is observed with a direct-viewing type stereoscopic endoscope, and FIG. 15 is an endoscope of the defect portion captured with the direct-viewing type stereoscopic endoscope. FIG. 16 is a diagram for explaining a state in which a defect portion of a projection is observed with a side-viewing type stereoscopic endoscope, and FIG. 17 is a defect captured with a side-viewing type stereoscopic endoscope. It is a figure which shows the endoscopic image of a part.
JP 2004-33487 A

  However, in order to perform stereo measurement of a defective part with high accuracy, it is troublesome for a user to perform measurement by direct view and measurement by side view by exchanging the adapter during work. However, as shown in the graph showing the spatial resolution of the stereo measurement apparatus in FIG. 18, it corresponds to the depth direction of the screen indicated by the broken line as compared with the dimensional accuracy in the X direction and the Y direction parallel to the screen indicated by the solid line. It has been found that the dimensional accuracy in the Z direction is greatly reduced. In other words, it is difficult to measure all of the X direction, Y direction, and Z direction with high accuracy by only one of the stereo measurement by direct view or the stereo measurement by side view, and the measurement result of the dimension corresponding to the depth direction of the screen varies. Arise.

  In stereo measurement, it is necessary to display target corresponding points on the left and right images. However, when halation occurs in the measurement region or when the measurement region is in a mirror state, it may be difficult to correctly display desired corresponding points on the left and right images. That is, under such circumstances, the reliability of the measurement value may be impaired.

  The present invention has been made in view of the above circumstances, and an endoscope measurement adapter capable of easily performing highly accurate and reliable stereo measurement without bothering a user's hand, and the endoscope measurement adapter. It aims at providing the endoscope system for measurement provided with.

  An endoscope measurement adapter according to the present invention includes an attachment portion disposed at a distal end portion of an insertion portion having a distal end surface of an objective optical system included in the endoscope, and the attachment portion disposed at the distal end portion of the insertion portion. And an observation unit including a mirror that is arranged in front of the front end surface of the objective optical system and converts a part of the visual field direction of the objective optical system to a direction different from the visual field direction. .

  According to this configuration, by attaching the attachment portion to the distal end portion of the endoscope, optical images in two viewing directions can be obtained by the objective optical system of the endoscope. Specifically, one optical image is an optical image in the visual field direction possessed by the objective optical system, and the other optical image is an optical image different from the visual field direction possessed by the objective optical system obtained by reflection on a mirror.

  In addition, an endoscope system for measurement according to the present invention includes an electronic endoscope provided with an objective optical system for forming an optical image on an imaging unit provided at a distal end of an insertion unit, and the electronic endoscope. An endoscope measurement adapter equipped with a mirror for converting a part of the visual field direction of the objective optical system to a direction different from the visual field direction, attached to the distal end portion, and connected to the electronic endoscope, A control device including an image processing unit that receives an imaging signal from the imaging unit and generates a video signal; and a control unit that includes a measurement processing unit that performs measurement processing based on the image signal generated by the image processing unit; and A display device that receives the video signal output based on an instruction of the control unit of the control device and displays the endoscopic image thereof.

  According to this configuration, the imaging unit forms an optical image in the visual field direction of the objective optical system of the endoscope and an optical image different from the visual field direction of the objective optical system obtained by reflection on the mirror. Imaged. Therefore, endoscopic images corresponding to two viewing directions are displayed on the screen of the display device. The measurement processing unit can perform highly accurate measurement by using the coordinates of a point optimal for measurement from two endoscopic images having different viewing directions.

  According to the present invention, an endoscope measurement adapter that can easily perform highly accurate and reliable stereo measurement without bothering a user, and a measurement endoscope system including the endoscope measurement adapter Can be realized.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 8 relate to a first embodiment of an endoscope measurement adapter and a measurement endoscope system including the endoscope measurement adapter, and FIG. 1 is a diagram illustrating the measurement endoscope system. FIG. 2 is a block diagram illustrating a schematic configuration of a measurement endoscope system, FIG. 3 is a cross-sectional view illustrating a configuration of an endoscope measurement adapter, and FIG. 4 is an endoscope equipped with the endoscope measurement adapter. FIG. 5 is a diagram for explaining an examination state, FIG. 5 is a diagram for explaining an endoscopic image captured by an endoscope equipped with an endoscope measurement adapter, FIG. 6 is a diagram for explaining a measurement portion of a defect portion, and FIG. FIG. 8 is a flowchart for explaining an example of a procedure for measuring a defect portion, and FIG. 8 is a diagram for explaining a measurement portion of the defect portion in an endoscopic image.

  As shown in FIGS. 1 and 2, an endoscope system for measurement 1 according to this embodiment includes an endoscope 2, an apparatus main body 3, a remote controller 4, and a liquid crystal monitor (hereinafter referred to as LCD) that is a display device. ) 5, an endoscope measurement adapter 6 (hereinafter referred to as an adapter), and the like.

  The endoscope 2 includes an elongated insertion portion 20. The apparatus main body 3 includes a storage unit that stores the insertion unit 20, a control unit 7 that is a control device, and the like. The remote controller 4 is operated when executing various operation controls of the entire apparatus. On the screen 5a of the LCD 5, an endoscopic image, operation control content (for example, a processing menu described later), and the like are displayed. Reference numeral 7 denotes a handle, which is used when the insertion portion 20 is stored in the apparatus main body 3.

  The insertion portion 20 is configured by connecting, in order from the distal end side, a rigid distal end portion 21, for example, a bending portion 22 that can be bent vertically and horizontally, and a flexible tube portion 23 having flexibility. The distal end portion 21 is provided with a pair of objective optical systems 24 and a pair of illumination optical systems 25 that enable stereo observation. An imaging element 26 is built in the distal end portion 21 of the insertion portion 20.

  The remote controller 4 includes switches such as a joystick 41, a measurement execution switch 42, and a lever switch 43 on one side. The joystick 41 is a switch that instructs the bending operation of the bending portion 22. The joystick 41 is tilted to bend the bending portion 22 in the direction corresponding to the tilt direction by the tilt angle. The measurement execution switch 42 is a switch used when executing measurement software. The lever switch 43 is a switch for performing various menu operations displayed graphically or a pointer moving operation when performing measurement. The lever switch 43 is configured in substantially the same manner as the joystick 41.

The measurement execution switch 42 is configured to employ a push-down type in which an on / off instruction is given by, for example, a push-down operation.
The control unit 7 includes an endoscope unit 8, a camera control unit (hereinafter referred to as CCU) 9 as an image processing unit, and a control unit 10 as a control unit. A proximal end portion of the insertion portion 20 is connected to the endoscope unit 8.

  The endoscope unit 8 includes a light source device (not shown) that supplies illumination light necessary for observation, and a bending device (not shown) that bends the bending portion 22 that constitutes the insertion portion 20.

  The CCU 9 includes an image processing circuit and the like. When an imaging signal output from the imaging device 26 such as a CCD is input, the CCU 9 converts the imaging signal into a video signal and supplies the video signal to the control unit 10.

  In the control unit 10, an audio signal processing circuit 11, a video signal processing circuit 12 to which video signals are input, a ROM 13, a RAM 14, and a PC card interface (hereinafter referred to as a first I / F) 15, a USB interface ( Hereinafter, various interfaces such as the second I / F) 16, RS-232C interface (hereinafter referred to as the third I / F) 17 and the like, and these various functions are executed based on the main program to control the operation. CPU 18 for performing the above is provided.

  The third I / F 17 is connected to the CCU 9, the endoscope unit 8, and the remote controller 4 that performs control and operation instructions for the CCU 9, the endoscope unit 8, and the like. As a result, communication for controlling the operation of the CCU 9 and the endoscope unit 8 based on the operation of the remote controller 4 is performed.

  The second I / F 16 is an interface for electrically connecting the control unit 7 and the personal computer 31. By connecting the control unit 7 and the personal computer 31 via the second I / F 16, various instruction controls such as an instruction to display an endoscopic image and image processing at the time of measurement are performed on the personal computer 31 side. Is possible. In addition, control information and data necessary for various processes can be input and output between the control unit 7 and the personal computer 31.

  Various recording media such as a PCMCIA memory card 32 and a compact flash (registered trademark) memory card 33 can be freely attached to and detached from the first I / F 15. By mounting the recording medium on the first I / F 15, the control processing information stored in the recording medium or the data such as image information or the control processing information data is controlled by the CPU 18. Alternatively, data such as image information can be recorded on the recording medium.

  The video signal processing circuit 12 generates a video signal on which processing necessary for display on the screen 5a of the LCD 5 is performed based on the endoscopic image supplied from the CCU 9 and a graphic operation menu, and the LCD 5 To supply. Accordingly, a single endoscopic image, an operation menu image, a composite image of the endoscopic image and the operation menu image, or the like is displayed on the screen of the LCD 5.

  The audio signal processing circuit 11 is supplied with an audio signal collected by the microphone 34, an audio signal obtained by reproducing the recording medium, an audio signal generated by the CPU 18, or the like. The audio signal processing circuit 11 performs processing such as amplification processing necessary for reproducing the supplied audio signal and outputs the processed signal to the speaker 35. As a result, sound is output from the speaker 35.

  The CPU 18 executes the program stored in the ROM 13 to control various circuit units and the like so as to perform processing according to the purpose, thereby controlling the operation of the entire system. The CPU 18 includes a measurement processing unit 18a. In a state where the measurement execution switch 42 of the remote controller 4 is pressed by the user, the measurement processing unit 18a acquires a measurement point corresponding to the operation of the lever switch 43 and measures the dimension of the missing part.

Here, the configuration of the adapter 6 will be described.
As shown in FIG. 3, the adapter 6 is integrally disposed in the distal end portion 21 of the endoscope 2 by press-fitting or bonding. The distal end rigid portion 27 constituting the distal end portion 21 of the endoscope 2 is provided with a pair of objective optical systems 24 and a pair of illumination optical systems 25. The illumination optical system 25 includes an illumination window 25a and a light guide fiber bundle 25b. The objective optical system 24 includes an observation window 24a, an objective lens group 24b composed of a plurality of optical lenses and the like, and an imaging unit 24c including an imaging element 26, a circuit board (not shown), and the like. Reference numeral 24d denotes a signal line that extends from the imaging unit 24c toward the endoscope unit 8.

  As shown in FIGS. 1 and 3, the endoscope measurement adapter 6 includes an attachment portion 6 a and an observation portion 6 b disposed at the distal end portion 21. The attachment portion 6a is tubular and is fitted on the distal end portion 21. The observation part 6b includes an inclined surface part 6c. The inclined surface portion 6c is configured as an inclined surface that gradually moves from the lower side of the observation range in the drawing of the objective optical system 24 of the endoscope 2 toward the center as the distance from the distal end surface of the distal end portion 21 increases. In the present embodiment, the inclined surface portion 6c intersects the optical axis OA of the objective optical system 24 at an angle θ of, for example, 45 degrees. The inclined surface 6c is provided with a mirror 8 for converting a part of the visual field direction of the objective optical system 24 into a direction having an angle different from the visual field direction.

The relationship between the inclined surface portion 6c and the mirror 8 will be described.
The mirror 8 has, for example, a quadrangular (rectangular) shape, and is disposed on the inclined surface portion 6 c in consideration of an observation range that is a field of view of the objective optical system 24. Specifically, the upper side 8u in the figure, which is one side of the mirror 8, is parallel to the horizontal axis of the imaging surface (not shown) of the imaging device 26 and is also on the pair of optical axes OA of the objective optical system 24. They are arranged in parallel at or near the intersection. In the adapter 6 in this embodiment, the upper side 8u of the mirror 8 provided in the adapter 6 intersects the optical axis OA of each objective optical system 24.

  Therefore, in the endoscope 2 in which the adapter 6 is attached to the distal end portion 21, half of the visual field in the direct viewing direction of the objective optical system 24 included in the endoscope 2 is reduced by the adapter 6 in which the mirror 8 is disposed. The direction is converted from the direct viewing direction to a side viewing direction having a different angle. In other words, the endoscope 2 having the adapter 6 attached to the distal end portion 21 has a configuration including two viewing directions, that is, a direct viewing direction and a side viewing direction.

Here, the operation of the endoscope 2 in which the adapter 6 is attached to the distal end portion 21 will be described.
As shown in FIG. 1, the insertion portion 20 of the endoscope 2 with the adapter 6 attached to the distal end portion 21 and having two visual field directions is opposed to the projection portion 9b that is an observation site through, for example, a through hole 9a. Then, the presence or absence of the defect portion 9c is observed.

  At this time, as shown in FIGS. 3 and 4, the mirror 8 provided in the observation portion 6b of the adapter 6 is arranged on the lower surface side of the projection 9b in the drawing. As a result, on the image pickup surface of the image pickup element 26, an optical image that has passed through each objective optical system 24 and is captured in the visual field in the direct viewing direction and an optical image captured in the visual field in the side viewing direction are formed. Specifically, an optical image in a state where the projection 9b is observed from substantially the front is formed on the upper half of the imaging surface of the image sensor 26, and the projection 9b is observed from the lower surface side in the lower half of the imaging surface. An optical image is formed.

  The imaging signal photoelectrically converted by the imaging element 26 is supplied to the CCU 9 through the signal line 24d, converted into a video signal, and then supplied to the video signal processing circuit 12. Thus, as shown in FIG. 5, endoscopic images 28 and 29 captured by the pair of objective optical systems 24 including, for example, the defect 9c are displayed on the screen 5a of the LCD 5. In the upper half of each of the endoscopic images 28 and 29, so-called direct-view images 28a and 29a captured in the field of view of the objective optical system 24 in the direct-view direction are displayed. On the other hand, so-called side-view images 28b and 29b captured in the field of view of the objective optical system 24 in the side view direction are displayed in the lower half of the respective endoscopic images 28 and 29. That is, the screen 5 a includes an endoscopic image 28 including a direct-view image 28 a and a side-view image 28 b captured by one objective optical system 24, and a direct-view image 29 a and a side view captured by the other objective optical system 24. The endoscopic image 29 including the image 29b is displayed at a time.

  In this way, a mirror that converts a part of the visual field direction is arranged on one adapter in the visual field direction, for example, the distal end portion of the endoscope that includes an objective optical system for performing direct-view observation. Then, by the endoscope provided with the direct-view objective optical system, the endoscope image captured in the visual field direction of the objective optical system on the screen, and the objective optical system reflected by the mirror and converted in the visual field direction It is possible to obtain an endoscopic image captured in a different visual field direction at a time.

  As a result, an endoscopic image in which the width direction and the thickness direction of the defect portion are parallel to the screen and an endoscope in which the depth direction of the defect portion is parallel to the screen on the screen by a direct-view endoscope. By displaying a mirror image, high-precision measurement can be realized. In the present embodiment, the angle θ is set to 45 degrees. However, the angle θ is not limited to 45 degrees, and is appropriately set in consideration of the observation target site and the like.

  Here, a procedure for performing stereo measurement of the defect portion 9c using the endoscope apparatus 1 configured as described above will be described with reference to FIGS.

  The user performs the procedure shown in FIG. 7 when measuring the size of the defect 9c as shown in FIG. 6, that is, the width dimension W, the thickness dimension T, and the depth dimension D.

  First, the user presses the measurement execution switch 42 of the remote controller 4 in a state where the endoscope images 28 and 29 including the defect portion 9c are displayed on the screen 5a as shown in FIG. Then, a measurement program is executed under the control of the CPU 18.

  That is, as shown in step S1 of FIG. 7, first, the CPU 18 prompts the acquisition of a measurement point for measuring the width dimension of the defect portion 9c on the screen 5a, for example. The user uses the lever switch 43 to designate the point A1 and the point B1 in the direct-view image 28a of the endoscopic image 28 as shown in FIG. Then, as shown in step S2, the CPU 18 registers the coordinates of the points A1 and B1, and proceeds to step S3.

  In step S3, the CPU 18 prompts the acquisition of a measurement point for measuring the thickness dimension of the defect portion 9c. The user uses the lever switch 43 to designate a point C1 and a point D1, for example, in the direct-view image 28a of the endoscopic image 28 as shown in FIG. Then, as shown in step S4, the CPU 18 registers the coordinates of the point C1 and the point D1, and proceeds to step S5.

  In step S5, the CPU 18 prompts acquisition of a measurement point for measuring the depth dimension of the missing portion 9c. The user uses the lever switch 43 to designate a point A2, a point B2, and a point C2 in the side view image 28b of the endoscopic image 28 as shown in FIG. Then, as shown in step S6, the CPU 18 registers the coordinates of the points A2, B2, and C2, and proceeds to step S7.

  In step S7, the CPU 18 calculates the width dimension, the thickness dimension, and the depth dimension of the missing portion 9c. That is, the width dimension W that is the distance between the points A1 and B1 is calculated from the coordinate values of the points A1 and B1. Further, a thickness dimension T that is a distance between the points C1 and D1 is calculated from the coordinate values of the points C1 and D1. Further, a straight line A2B2 passing through the points A2 and B2 is obtained from the coordinate values of the points A2 and B2, and then a depth dimension D that is the shortest distance from the straight line A2B2 to the point C2 is calculated. Then, based on the control of the CPU 18, the calculation result is displayed in a range indicated by, for example, 5b on the screen. This completes the measurement of the width dimension, the thickness dimension, and the depth dimension of the defect portion 9c.

  As described above, in the measurement endoscope system including the endoscope, the endoscope measurement adapter, the control device, and the LCD, the endoscope measurement adapter is attached to the distal end portion of the endoscope. The endoscope image captured in the visual field direction of the objective optical system provided in the endoscope on the LCD screen is different from the visual field direction of the objective optical system reflected by the mirror and converted in the visual field direction. It is possible to display the endoscopic images in the viewing directions at different angles, which are viewing directions, at a time. At this time, the endoscope image displayed on the screen includes an endoscope image captured in the visual field direction of the objective optical system, and an endoscope captured in a visual field direction at an angle different from the visual field direction of the objective optical system. It is with an image. Each of the endoscopic images is an endoscope image for measuring the width dimension and thickness dimension of the defect portion with high accuracy, and an endoscope image for measuring the depth dimension of the defect portion with high accuracy. is there. Therefore, in the present embodiment, a direct-view image in which the width direction and the thickness direction of the defect portion are arranged in a direction parallel to the screen on the screen by a direct-view endoscope, and the depth direction of the defect portion are By displaying a side-view image arranged in a direction parallel to the screen, high-precision measurement can be realized in a short time.

  As a result, high-precision measurement can be performed without using two types of endoscopes having different viewing directions, so that the burden on the user can be reduced and the inspection time can be greatly shortened.

  In this embodiment, the objective optical system of the endoscope to which the adapter is attached is a direct view type. However, the objective optical system of the endoscope is not limited to the direct view type, and may be a perspective type.

  9 to 11 relate to a modification of the adapter. FIG. 9 is a cross-sectional view illustrating the configuration of a side-view type endoscope and an endoscope measurement adapter attached to the endoscope. FIG. FIG. 11 is a diagram for explaining an inspection state by a perspective type endoscope equipped with the endoscope measurement adapter of FIG. 9, and FIG. 11 is imaged by a side type endoscope equipped with the endoscope measurement adapter of FIG. It is a figure explaining an endoscopic image.

  As shown in FIG. 9, the adapter 6A is integrally disposed by press-fitting or bonding to the distal end portion 21A of the endoscope 2A. The distal end rigid portion 27A constituting the distal end portion 21A of the endoscope 2 includes a pair of objective optical systems 51 having a visual field direction obliquely forward with respect to the insertion direction of the endoscope 2A, and a pair of illumination optical systems. 52 are provided. The endoscope 2A in the present embodiment is a perspective type in which the visual field direction of the objective optical system is obliquely forward.

  The objective optical system 51 includes a prism 51a, an objective lens group 51b including a plurality of optical lenses, and an imaging unit 51c including an imaging element 53 and the like. The prism 51a has its visual field direction bent obliquely forward with respect to the endoscope insertion axis direction. Reference numeral 51d denotes a signal line that extends from the imaging unit 51c toward the endoscope unit 8.

  The illumination optical system 52 has a light guide fiber bundle 52b composed of an illumination window 52a and a light guide fiber bundle 52b so that the tip side of the illumination optical system 52 faces the illumination window 52a disposed on the inclined surface in a substantially orthogonal state. It is bent diagonally forward with respect to the insertion direction axis.

  Similar to the adapter 6, the adapter 6 </ b> A includes an attachment portion 6 a and an observation portion 6 b. The observation part 6b includes an inclined surface part 6d. In the present embodiment, the inclined surface portion 6d intersects the optical axis OB of the objective lens group 51b at an angle θ1 of, for example, 30 degrees. A mirror 8A for converting half of the visual field direction of the objective optical system 51 into a visual field direction having a different angle is disposed on the inclined surface portion 6d.

The relationship between the inclined surface portion 6d and the mirror 8A will be described.
The mirror 8A has, for example, a quadrangular (rectangular) shape, and is disposed on the inclined surface portion 6d in consideration of the observation range of the objective optical system 51. Specifically, the upper side 8u of the mirror 8A is parallel to the horizontal axis of the image pickup surface (not shown) of the image pickup device 53, and intersects or is parallel to the pair of optical axes OB of the objective optical system 51. Placed in.

  Therefore, in the endoscope 2A in which the adapter 6A is attached to the distal end portion 21A, half of the visual field in the perspective direction of the objective optical system 51 provided in the endoscope 2A is reduced by the adapter 6A in which the mirror 8A is disposed. It is converted into a viewing direction at an angle different from the perspective direction. In other words, the perspective endoscope 2 </ b> A is configured to include two viewing directions, that is, a perspective direction provided in the objective optical system 51 and a viewing direction in which the perspective direction provided in the objective optical system 51 is different in angle.

Here, the operation of the endoscope 2A in which the adapter 6A is attached to the distal end portion 21A will be described.
As shown in FIGS. 9 and 10, the tip 21 </ b> A to which the adapter 6 </ b> A is attached is opposed to the protrusion 9 b as an observation site from obliquely below. At this time, the mirror 8A provided in the observation part 6b of the adapter 6A is arranged without entering the lower surface side of the protrusion 9b.

  As a result, an optical image that has passed through each objective optical system 51 on the image pickup surface of the image pickup device 53 and is captured in a visual field in a perspective direction, and an optical image that is captured in a visual field in a visual field direction that is different from the perspective direction. An image is formed. Specifically, an optical image obtained by observing the protruding portion 9b from substantially the front is formed on the upper half of the imaging surface of the imaging element 53, and the optical image obtained by observing the protruding portion 9b from the oblique front side on the lower half of the imaging surface. An image is formed.

  The imaging signal photoelectrically converted by the imaging element 53 is supplied to the CCU 9 via the signal line 51d, converted into a video signal, and then supplied to the video signal processing circuit 12. As a result, as shown in FIG. 11, endoscopic images 54 and 55 captured by the pair of objective optical systems 51 are displayed on the screen 5 a of the LCD 5. Then, so-called images 54 a and 55 a captured in the perspective field of each objective optical system 51 are displayed in the upper half of the respective endoscopic images 54 and 55. On the other hand, images 54b and 55b are displayed in the lower half of the respective endoscopic images 54 and 55. The images 54b and 55b are captured in a visual field direction different from the perspective direction of the objective optical system 51.

  That is, the screen 5a includes an endoscopic image 54 including an image 54a and an image 54b captured by one objective optical system 51, and an endoscope including an image 55a and an image 55b captured by the other objective optical system 51. The mirror image 55 is displayed at a time.

  As a result, the same operations and effects as those of the above-described embodiment can be obtained. Therefore, an endoscope image in the width direction and thickness direction of the defect portion parallel to the screen and an endoscope image in the depth direction of the defect portion are displayed on the screen by the perspective type endoscope. Accurate measurement can be realized.

  FIGS. 12 and 13 relate to the second embodiment of the present invention, FIG. 12 is a diagram for explaining another configuration of the measurement endoscope system, and FIG. 13 is a diagram for explaining the operation of the measurement endoscope system. is there.

  In the measurement endoscope system 1A of the present embodiment, a light source device 60 for supplying the second illumination light to the endoscope unit 8 is provided. An illumination light supply unit (hereinafter abbreviated as illumination unit) 61 is detachably attached to the second light source device 60.

  The illumination unit 61 includes a light guide connector portion 62 that can be attached to and detached from the illumination unit 61, a light guide fiber bundle portion 63, and a light emitting portion 64. The light emitting part 64 is configured as a thin ring-shaped part by gathering together a plurality of light guide fibers 63a. An emission surface 64a constituting the distal end side of the light emitting portion 64 is disposed on an illumination light incident surface 6g of an adapter 6B described later, and a proximal end portion is disposed on the outer surface of the distal end portion 21 constituting the insertion portion 20. .

  The light guide fiber bundle portion 63 includes a plurality of fiber bundles 65. Each fiber bundle 65 is configured by bundling a plurality of light guide fibers 63a. The light emitting part 64 side of each fiber bundle 65 is configured as a thin flat part 65a, and the light guide connector part 62 side is configured as a columnar part 65b. The middle part of the fiber bundle 65 is configured as a transition part 65c that gradually changes its shape from the cylindrical part 65b to the flat part 65a. The light emitting portion 64 is configured by integrating a flat shape portion 65a. A part of the fiber bundle 65 constituting the light guide fiber bundle portion 63 is disposed on the outer surface of the insertion portion 20.

  On the other hand, the adapter 6B of the present embodiment includes a mounting portion 6e and an observation portion 6b disposed at the distal end portion 21. The attachment portion 6e is tubular and is fitted on the distal end portion 21. The attachment portion 6e includes an annular recess 6f in which the light emitting portion 64 constituting the illumination unit 61 is disposed. The bottom surface of the annular recess 6f is configured as an illumination light incident surface 6g, and the exit surface 64a of the light emitting unit 64 is arranged in close contact.

  In the present embodiment, the adapter 6B is made of, for example, a resin having optical transparency. Therefore, in a state where the light emitting unit 64 is disposed in the annular recess 6f, the illumination light emitted from the emission surface 64a of the light emitting unit 64 is illuminated by the illumination light of the light source device 60 being supplied to the illumination unit 61. The light enters the adapter 6B from the light incident surface 6g.

  The illumination light that has entered the adapter 6B is emitted outward from the outer surface of the adapter 6B. That is, in the present embodiment, the range indicated by the broken line on the outer surface of the adapter 6B is configured as the illumination light exit surface 6h. And the matte processing which gives a fine unevenness | corrugation to the illumination light emission surface 6h is made | formed. Other configurations are the same as those of the first embodiment, and the same members are denoted by the same reference numerals and description thereof is omitted.

  In the endoscope 2 in which the adapter 6B is attached to the distal end portion 21 and the light emitting portion 64 of the illumination unit 61 is disposed in the annular recess 6f of the adapter 6B, the endoscope 2 is provided on the outer surface of the adapter 6B as shown in FIG. Scattered light is emitted from the illumination light exit surface 6h.

  Therefore, even when the observation site is a metal surface (mirror surface state), halation is prevented from occurring in the observation site. For this reason, the image of the observation region is displayed equally on the left and right, and the problem that the reliability of the measurement value is impaired due to the different corresponding points in the left and right images can be solved. Other operations and effects are the same as those of the first embodiment, and the same members are denoted by the same reference numerals and description thereof is omitted.

  As shown by the solid line in FIG. 13, the illumination light exit surface 6h can be efficiently illuminated by applying a process for preventing the illumination light from leaking to the outside of the adapter 6B other than the illumination light exit surface 6h. Light is emitted toward the outside.

  The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the invention.

1 to 8 relate to an endoscope measurement adapter and a first embodiment of a measurement endoscope system including the endoscope measurement adapter, and FIG. 1 is a diagram illustrating the measurement endoscope system. Block diagram explaining the schematic configuration of the endoscope system for measurement Sectional drawing explaining the structure of the measurement adapter for endoscopes The figure explaining the inspection state by the endoscope equipped with the endoscope measurement adapter The figure explaining the endoscopic image imaged with the endoscope equipped with the endoscope measurement adapter Diagram explaining the measurement part of the missing part Flowchart for explaining an example of the measurement procedure of the missing part The figure explaining the measurement part of the defective part in the endoscopic image 9 to 11 relate to a modification of the adapter, and FIG. 9 is a cross-sectional view illustrating a configuration of a side-view type endoscope and an endoscope measurement adapter attached to the endoscope. The figure explaining the test | inspection state by the side type | mold endoscope which mounted | wore with the endoscope measuring adapter of FIG. The figure explaining the endoscopic image imaged with the side-view type endoscope equipped with the endoscope measuring adapter of FIG. FIGS. 12 and 13 relate to the second embodiment of the present invention, and FIG. 12 is a diagram for explaining another configuration of the endoscope system for measurement. The figure explaining the operation of the endoscope system for measurement The figure explaining the state which observes the defective part of a projection part with a direct-viewing type stereoscopic endoscope The figure which shows the endoscopic image of the defect | deletion part caught with the direct view type | mold stereoscopic endoscope The figure explaining the state which observes the defective part of a projection part with a side-view type stereoscopic endoscope The figure which shows the endoscopic image of the defect | deletion part caught with the side-view type stereoscopic endoscope Graph showing the spatial resolution of stereo measurement equipment

Explanation of symbols

DESCRIPTION OF SYMBOLS 2 ... Endoscope 6 ... Endoscope measurement adapter 6a ... Mounting part 6b ... Observation part 8 ... Mirror 20 ... Insertion part 21 ... Tip part 24 ... Objective optical system 24a ... Observation window

Claims (9)

A mounting portion disposed at the distal end portion of the insertion portion including the distal end surface of the objective optical system of the endoscope;
A part of the visual field direction of the objective optical system, which is disposed in front of the distal end surface of the objective optical system in a state where the mounting portion is disposed at the distal end portion of the insertion portion, is converted into a direction different from the visual field direction. An observation unit with a mirror to be
An endoscope measurement adapter, comprising: In the configuration in which the observation unit includes an inclined surface portion,
The endoscope measurement adapter according to claim 1, wherein the mirror is disposed on an inclined surface portion to divide the visual field direction of the objective optical system into two. In the configuration in which the mirror has a square shape,
The endoscope measurement adapter according to claim 2, wherein the upper side of the mirror is orthogonal to the optical axis of the objective optical system. In the configuration in which the endoscope includes a pair of objective optical systems,
The endoscope according to claim 1, wherein the mirror is disposed in the observation unit with a parallel positional relationship between an upper side of the mirror and a straight line connecting the optical axes of the objective optical systems. Measurement adapter.   5. The endoscope measurement according to claim 4, wherein the mirror divides the visual field of the objective optical system into two by making the upper side of the mirror perpendicular to the optical axis of each objective optical system. adapter. An electronic endoscope including an objective optical system for forming an optical image on an imaging unit provided at a distal end of the insertion unit;
An endoscope measurement adapter equipped with a mirror that is attached to the tip of the electronic endoscope and converts a part of the visual field direction of the objective optical system to a direction different from the visual field direction;
An image processing unit that is connected to the electronic endoscope and receives an imaging signal from the imaging unit to generate a video signal, and a measurement processing unit that performs a measurement process based on the image signal generated by the image processing unit A control device including a control unit;
A display device for receiving an image signal output based on an instruction of the control unit of the control device and displaying the endoscopic image;
An endoscope system for measurement comprising:   The endoscope measurement adapter divides the visual field direction of the objective optical system into two different directions, and the imaging unit captures an optical image captured in one visual field direction of the objective optical system, and the objective optical system. 7. The measuring endoscope system according to claim 6, wherein an optical image captured in another visual field direction of the system is formed. In the configuration in which the mirror has a quadrangular shape and the endoscope includes a pair of objective optical systems,
The upper side of the mirror is arranged orthogonally to the optical axis of each objective optical system, an optical image captured in the one visual field direction is formed on one half surface of the imaging unit, and the other direction of the imaging unit is formed. 8. The measuring endoscope system according to claim 7, wherein an optical image captured in the other visual field direction is formed on a half surface. Furthermore, in a configuration comprising an illumination light supply unit having a light emitting part, a light guide fiber bundle part, and a light guide connector part, which is detachably attached to the insertion part of the endoscope,
The endoscope measurement adapter is formed of a transparent member, and the endoscope measurement adapter is provided with an illumination light incident surface on which an emission surface of the light emitting unit is disposed. Measuring endoscope system.

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