JP2003140056A - Measuring endoscope apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a measuring endoscope apparatus which enables a user to acquire a mask shape of distinct contours and to make measurement with always high accuracy by obtaining the most suitable white image in the calibration processing with everyone. SOLUTION: A tool 3 for calibration comprises a tool body 31 and an endoscope guide member 32. A white recessed part 33 having a white inside surface, an inspection hole 35 for side view, a plate 40 for inspection and a plate mounting surface 36 to be arranged with the plate 40 for inspection are formed at the tool body 31. A central index 37 giving an indication of exposure energy is disposed at the center on the base surface of the white recessed part 33. When the exposure energy is gradually increased while photographing is performed in the state of disposing the visual field center of the endoscope 10 opposite to the central index 37, the central index 37 melts into the white recessed part 33, making the index invisible. At this time, the mask shape is most distinct.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a measuring endoscope apparatus capable of measuring using a stereo measuring optical adapter.

[0002]

2. Description of the Related Art Endoscope devices are widely used in medical fields and industrial fields. BACKGROUND ART As an endoscope apparatus used in the industrial field, there is an endoscope apparatus in which a slender endoscope insertion portion is inserted into a jet engine or a pipe of a power plant to observe a test site and perform various treatments. In recent years, in endoscopic observation, in addition to the observation of the site to be examined, it is desired to measure the size and position of the site to be examined, and in order to satisfy this requirement,
Various devices for measuring an object to be measured using an endoscope have been proposed.

For example, the applicant of the present invention has filed Japanese Patent Application No. 2000-10.
No. 1122 proposes a measurement endoscope apparatus that automatically selects and executes a measurement method that differs depending on the type of optical adapter according to the type of optical adapter.

This measuring endoscope apparatus includes a connecting portion provided at a distal end portion of the endoscope, a plurality of types of optical adapters for forming a detachable subject image on the image pickup element on the connecting portion, and the optical adapter. One of which is connected to measure the image signal of the image pickup device by image processing, and a menu display process for selecting and operating the menu display process based on display data previously associated with the plurality of optical adapters. A measurement processing unit that performs measurement processing based on the selection result of the processing is configured.

Therefore, when the optical adapter is selected on the menu, the measuring method corresponding to the optical adapter is automatically selected, and when the measurement is executed, the measurement execution switch provided on the endoscope operation section is depressed. Simply, the measurement process corresponding to the selected measurement method is executed.

In the embodiment of Japanese Patent Application No. 2000-101122, calibration processing is performed for each of a plurality of optical adapters, and the result is stored as environmental data in an external storage medium such as CompactFlash (registered trademark). However, by selecting the optical adapter used on the menu, environmental data corresponding to the optical adapter is selected.

In the measurement endoscope apparatus, when a plurality of optical adapters are owned and the measurement is performed by exchanging them, the result of the calibration processing performed for each optical adapter is saved as environmental data, and the optical adapter is used. By changing the environmental data when exchanging, it is possible to easily measure.

[0008]

However, in order to compare the shape and position of the mask during production during the calibration process, it is necessary for the user to obtain the mask shape of the stereo measurement optical adapter with high accuracy. There was a problem that was difficult for me.

This is because when a white paper or white sponge is photographed from a predetermined distance to obtain a white image and a mask shape is obtained, the amount of illumination light from the light source device is too bright or too dark depending on the user. This is because the contour of the mask could not be clearly photographed because the optimum white image could not be obtained depending on the photographing conditions.

The present invention has been made in view of the above circumstances, and at the time of calibration processing, anyone can obtain an optimum white image and a mask shape with a clear contour, and always obtain high accuracy. It is an object of the present invention to provide a measuring endoscope device that can perform measurement.

[0011]

A measuring endoscope apparatus according to the present invention includes an endoscope in which an imaging element forming an observation optical system is built in a distal end portion of a slender insertion portion, and the endoscope insertion portion. A plurality of optical adapters that are detachably attached to the tip and include at least a stereo measurement optical adapter, an image processing unit that generates a video signal from an image pickup signal transmitted from the image pickup device of the endoscope, and the image processing unit. A display device that displays an endoscopic image by receiving a video signal from the device, an arithmetic processing unit that performs measurement processing from the image pickup signal transmitted from the image pickup device, and a mask shape of the stereo measurement optical adapter. It is equipped with a calibration jig.

The calibration jig is provided with a white concave portion having a white concave portion which is a subject, and a central index provided in the central portion of the white concave portion.

A guide hole is provided at a predetermined position of the calibration jig so that the center of the field of view of the observation optical system of the endoscope faces the center index of the white recess.

According to these configurations, the distal end of the endoscope equipped with the stereo measurement optical adapter is placed in the guide hole, and the center index of the white recess is captured through the observation optical system, and then the predetermined step is performed. By performing the work in (1), an optimum white image can be obtained and the mask shape of the stereo measurement optical adapter can be obtained with high accuracy.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 to 8 relate to an embodiment of the present invention, and FIG. 1 is a diagram for explaining a measuring endoscope apparatus, FIG.
Is a block diagram illustrating a configuration of an electric circuit of the measurement endoscope apparatus, FIG. 3 is a cross-sectional view illustrating a configuration of a calibration jig, and FIG. 4 is a perspective view illustrating a configuration of the calibration jig. FIG. 5 is a diagram for explaining a state in which the direct-viewing endoscope is attached to the calibration jig, FIG. 6 is a diagram for explaining a state in which the side-viewing endoscope is attached to the calibration jig, and FIG. 7 is a central index. 8 is a diagram for explaining another configuration of FIG.
FIG. 9 is a diagram illustrating another configuration of the calibration jig.

As shown in FIG. 1, the measuring endoscope apparatus 1 has a stereo measurement optical adapter 2 and an image pickup device (not shown) built in a tip 11 to which the stereo measurement optical adapter 2 is detachably connected. An endoscope 10 having an elongated endoscope insertion portion 12, and the stereo measurement optical adapter 2
A distal end portion 11 of an endoscope insertion portion 12 mounted with the calibration jig 3 for taking in the mask shape of the stereo measurement optical adapter 2 and a control for accommodating the endoscope 10 are arranged. The unit 4, the remote controller 5 that can perform the operations necessary to execute various operation controls of the entire system of the measurement endoscope apparatus 1, the endoscope image, the operation control content (for example, a processing menu), and the like are displayed. A liquid crystal monitor (hereinafter, referred to as LCD) 6 which is a display device, and a normal endoscope image, or a face mount display (hereinafter, referred to as FMD) capable of stereoscopically viewing the endoscopic image as a pseudo stereo image. 7 and an FMD adapter 7a that supplies image data to the FMD 7.

In this embodiment, the comparative measurement optical adapter 8 is detachably connected to the distal end portion of the endoscope insertion portion 12. Reference numeral 9 is an external video input terminal for inputting a video to the video signal processing circuit without passing through a CCU described later.

The measuring endoscope apparatus 1 will be described in detail with reference to FIG. As shown in the figure, the proximal end portion of the endoscope insertion portion 12 is connected to the endoscope unit 24. The endoscope unit 24 is housed in the control unit 4 shown in FIG. It should be noted that the endoscope unit 24 has a built-in light source device for obtaining illumination light necessary for photographing, an electric bending device for electrically driving a bending portion (not shown) of the endoscope insertion portion 12, and the like. ing.

An image pickup device (not shown) is built in the distal end portion 11 of the endoscope insertion portion 12, and an image pickup signal output from the image pickup device is a camera control unit (hereinafter, referred to as an image processor). (Described as CCU) 25. The CCU 25 converts the input image pickup signal into a video signal such as an NTSC signal and supplies the image signal to the main processing circuit group in the control unit 4.

The main circuit group mounted in the control unit 4 includes a CPU 26 that also serves as a control unit that executes and operates various functions based on a main program and an arithmetic processing unit that performs measurement processing, a ROM 27, a RAM 28, and a PC.
Card interface (hereinafter, referred to as PC card I / F) 29a, USB interface (hereinafter, USBI)
/ F) 29b, an RS-232C interface (hereinafter, referred to as RS-232C I / F) 29c, an audio signal processing circuit 19, and a video signal processing circuit 30.

The RS-232C I / F 29c is a C
It is connected to the CU 25, the endoscope unit 24, and the remote controller 5, respectively. In other words, the remote controller 5 is for controlling the CCU 25 and the endoscope unit 24 and performing operation instructions.

On the other hand, the RS-232C I / F 29c
Is for performing communication necessary for controlling the operation of the CCU 25 and the endoscope unit 24 based on the operation by the remote controller 5.

The USB I / F 29b is an interface for electrically connecting the control unit 4 and the personal computer 21. This U
The control unit 4 via the SBI / F29b
When the personal computer 21 is connected to
The personal computer 21 side can also perform various instruction controls such as an instruction to display an endoscopic image in the control unit 4 and image processing during measurement.
Further, it is possible to input / output control information, data, etc., required for various processes between the control unit 4 and the personal computer 21.

The PC card I / F 29a is a PCMC
External storage media such as the IA memory card 22 and the CompactFlash (registered trademark) memory card 23 are detachably connected. That is, when the external storage medium is attached, the control unit 4 is
By the control by 6, the data such as the control processing information and the image information stored in the external storage medium is reproduced and taken into the control unit 4 through the PC card I / F 29a, or the control processing information and the image information are stored. Data can be supplied to and recorded in the memory card via the PC card I / F 29a.

The video signal processing circuit 30 includes a CCU 25
To display a composite image that combines the endoscopic image supplied from
The video signal from 25 and the display signal based on the operation menu generated by the control of the CPU 26 are combined and further processed to be displayed on the screen of the LCD 6, and supplied to the LCD 6. As a result, a combined image of the endoscopic image and the operation menu is displayed on the LCD 6. In addition,
In the video signal processing circuit 30, it is also possible to simply perform processing for independently displaying an endoscopic image or an image such as an operation menu.

The control unit 4 is also provided with an external video input terminal 9 for inputting a video to the video signal processing circuit 30 without passing through the CCU 25. When a video signal is input to the external video input terminal 9, the video signal processing circuit 30 outputs the composite image with priority over the endoscopic image from the CCU 25.

The audio signal processing circuit 19 includes a microphone 20.
A sound signal that is collected and generated by the device and recorded in a storage medium such as a memory card, or a sound signal obtained by reproducing the storage medium such as a memory card, or a CPU
An audio signal generated by 26 is provided. The audio signal processing circuit 19 performs processing (amplification processing, etc.) necessary for reproducing the supplied audio signal, and the speaker 19
output to a. As a result, the audio signal is reproduced by the speaker 19a.

The CPU 26 executes a program stored in the ROM 27, controls various circuit parts so as to perform processing according to the purpose, and controls the operation of the entire system.

The remote controller 5 is provided with a joystick, a lever switch, a freeze switch, a store switch, a measurement execution switch and the like, which are not shown, on at least the upper surface thereof.

The structure and operation of the calibration jig 3 will be described with reference to FIGS. 3 and 4. As shown in the drawing, the calibration jig 3 includes a substantially cylindrical jig body 31 and a substantially tubular endoscope guide member 32. The jig body 31 and the endoscope guide member 32 are integrally fixed by screwing.

A white concave portion 33 having a circular opening, a hemispherical bottom side and a white inner surface, and a direct-viewing endoscope formed parallel to the central axis of the jig body 31 are inserted into the jig body 31. The direct-viewing inspection hole 34 to be arranged, the side-viewing inspection hole 35 through which the side-viewing endoscope formed perpendicularly to the central axis of the jig body 31 is arranged, for example, 0.1 inch and 2 Inspection plate with inspection reference line for millimeters (see Fig. 4)
A plate mounting surface 36 having a normal line inclined by 20 degrees with respect to the central axis of the jig body 31 on which 40 is arranged is formed.

At the center of the bottom surface of the white concave portion 33, a central index 37 serving as a guide for the exposure amount is provided. The center index 37 is a hemispherical recess having a predetermined diameter, and the endoscope 10 is formed by forming the center index 37 to have a predetermined diameter.
When the exposure amount is gradually increased while taking a picture with the center of the field of view facing the central index 37, the central index 37 melts into the white concave portion 33 and becomes invisible. At that time, the mask shape becomes the clearest. In other words, an image having the appropriate brightness for obtaining the mask shape is obtained on the basis of the time when the central index 37 melts into the white recess 33.

Specifically, in the present embodiment, the diameter of the central index 37 is 1 mm. This is because when observing the center index 37 with an optical adapter that has a distance to the object of 20 mm and a viewing angle of 60 degrees, the image of the center index 37 is about 1/15 of the height of the screen. That is because it is displayed on the screen.

If the diameter of the hemisphere of the central index 37 is smaller than this, the central index 37 will melt into the white concave surface and become invisible before the mask shape becomes clear, and the diameter of the hemisphere will be smaller than that. This is because the center index 37 is visible even when the mask shape is clear and cannot be used as a guide for the brightness when the mask shape is large. Therefore, in the present embodiment, the diameter dimension of the center index 37 is set to 1 of the screen height dimension.
It is set to / 20 to 1/10.

The direct-view inspection hole 34 is provided with an endoscope abutting portion 43a for keeping a constant distance to the plate 40 mounted on the plate mounting surface 36. Further, a cutout surface 38 for preventing the jig body 31 from rolling is formed on a predetermined outer peripheral surface of the jig body 31.

On the other hand, the direct-viewing endoscope 10 to which the stereo measurement optical adapter 2 is attached is inserted through the endoscope guiding member 32, and the center of the visual field of the direct-viewing endoscope 10 is set to the above-mentioned center. A direct-view calibration guide 41 facing a predetermined position of the center index 37 and a side-view endoscope (not shown) to which a stereo-measuring optical adapter for side-view, which will be described later, is inserted are arranged to be inserted therethrough. A side-view calibration guide 42 is formed to face the center of the visual field of the endoscope to the center of the central index.

As shown in FIG. 5, in this embodiment,
When the endoscope 10 is introduced into the direct-view calibration guide 41, the guide 41a is arranged so that the knurl 2a of the stereo measurement optical adapter 2 can be inserted and arranged so that the distance to the central index 37 is appropriate. The height dimension of is set.

Therefore, when the endoscope 10 is introduced into the direct-view calibration guide 41, the knurl 2a is used.
By paying attention to the position of, stable shooting conditions for white images can be easily obtained.

On the other hand, as shown in FIG. 6, in the present embodiment, after the side-viewing endoscope 10a is introduced so as to hit the abutting surface 42a of the side-viewing calibration guide 42, the calibration jig 3 is introduced. Is rotated about the central axis of the side-viewing endoscope so that the visual field center of the side-viewing endoscope can be made to face the center index 37 of the white concave portion 33.

Therefore, when the side-view endoscope is introduced into the side-view calibration guide 42, the abutting surface 42
By paying attention to the position around the axis of the endoscope in the state of abutting on a, it is possible to easily obtain stable shooting conditions for a white image.

Further, the plate 40 is provided with a direct-viewing inspection index 43 and a side-viewing inspection index 44. As shown in the drawing, the upside-down relationship between the direct-view inspection index 43 and the side-view inspection index 44 is reversed. This is because the positional relationship between the objective lens and the light guide (not shown) is opposite for direct viewing and for side viewing, and eliminates the problem of light distribution caused by providing the same positional relationship. There is.

Here, the stereo measurement by the measurement endoscope apparatus 1 will be briefly described. In the stereo measurement by the measurement endoscope apparatus 1, a first process of reading optical information from the storage medium in which the optical data of the stereo measurement optical adapter 2 is recorded, and a tip portion 11 of the endoscope 10.
Processing for reading the positional information between the image sensor of FIG. 3 and the objective lens system of the stereo measurement optical adapter 2, the positional relationship information and the image sensor of the main endoscope obtained at the time of production, and this stereo measurement. Third processing for obtaining a positional error of the image pickup device of the measuring endoscope apparatus from positional relationship information between the objective lens systems of the optical adapter 2 for use, and fourth processing for correcting the optical data from the positional error. Processing, fifth processing for coordinate-converting an image to be measured based on the corrected optical data, and sixth processing for obtaining three-dimensional coordinates of an arbitrary point by matching two images based on the coordinate-converted image This is done by performing at least and.

The CPU 26 controls the stereo measurement optical adapter 2 once to execute the first to fourth processes, for example, and record the result as measurement environment data on a storage medium. The first to fourth processes are collectively called a calibration process. At this time,
Information on the date and time when the calibration process is executed is also recorded as a part of the measurement environment data. After this,
When performing stereo measurement, the CPU 26 loads the measurement environment data on the RAM and controls so as to execute the fifth and sixth processes.

When performing the second process of reading the positional relationship information between the image pickup device of the tip portion 11 and the objective lens system of the stereo measurement optical adapter 2, it is provided in the stereo measurement optical adapter 2. The shape of the existing mask is taken in and the position and shape of the mask at the time of production are compared. In this case, the mask shape is captured by capturing a white image, that is, displaying an image of the white concave portion 33 of the calibration jig 3. The brightness of the white image at this time is determined with reference to how the central index 37 described above blends into the white recess 33.

Normally, the gain of the CCU 25 and the shutter speed of the image pickup device are automatically controlled to be optimum conditions. However, when the mask shape is taken in, the CCU is used.
The gain of 25 is low, the shutter speed of the image sensor tends to be set high, and the image becomes dark, so that the mask shape cannot be clearly captured, which adversely affects the measurement accuracy.

Therefore, in this embodiment, in the case of the stereo measurement optical adapter 2 for direct view, the distal end portion 11 of the endoscope 10 is inserted into the direct view calibration guide 41 of the calibration jig 3. The center of the visual field of the endoscope 10 is introduced so as to face the central index 37. At this time, since the knurled portion 2a of the stereo measurement optical adapter 2 is entirely visible, the distance to the center index 37 is maintained at a predetermined value.

On the other hand, in the case of a stereoscopic optical adapter for side view, the tip of the endoscope is inserted into the side view calibration guide 42 of the calibration jig 3 and the tip end surface is brought into contact with the abutting surface 42a. By doing so, the object distance to the central index 37 can be maintained at a predetermined value. At this time, the distal end portion of the endoscope or the calibration jig 3 is rotated around the axis in the length direction of the endoscope so that the center of the visual field is set to the center index 3.
Face 7

When the user confirms that the center index 37 faces the center of the visual field at a predetermined distance, the remote controller 5 is operated to instruct the CPU 26 to adjust the brightness, and the brightness of the screen is gradually increased. To go. Then, the brightness of the screen is fixed when the inside of the field of view becomes uniformly white and the central index 37 melts into the white concave portion 33 and becomes invisible. In the brightness adjustment process, the CPU 26 controls the shutter speed and the gain in accordance with the brightness adjustment instruction. As a result, the shape of the mask can be reliably captured.

In the process of capturing the white image, the brightness of the first screen is set in advance by the CPU 26 by the central index 37.
The brightness is controlled so that you can see. Further, in the measurement endoscope apparatus 1 of the present embodiment, when the measurement is performed using the comparative measurement optical adapter 8, a method based on comparative measurement is used. This comparative measurement is a method of measuring on the basis of known dimensions in the screen.

As described above, by providing the central index composed of a hemispherical concave portion having a predetermined size as a standard of the exposure amount in the center of the white concave portion which is the photographing object, the exposure amount for the photographing object is gradually increased. By setting the brightness when the central index is no longer visible as the reference brightness of the white image, anyone can easily obtain the reference white image when acquiring the mask shape. Thus, by using the calibration jig, anyone can obtain a clear mask shape by setting the reference brightness of the white image to be substantially constant.

Further, by providing a calibration guide for direct view to the calibration guide, the center of the visual field of the endoscope equipped with the stereo measurement optical adapter can be easily faced to the predetermined position of the central index of the white concave portion. it can.

Further, the endoscope guide member and the jig body are detachably configured, so that the surface of the white recess can be easily cleaned by removing the endoscope guide member from the jig body. it can. As a result, the surface of the white concave portion can always be kept in a predetermined white color.

After the calibration is completed, the tip of the endoscope is inserted through the inspection holes 34 and 35, the plate 40 is displayed on the screen, and the stereo measurement is executed. At this time, the measurement results of the lengths of the indexes 43 and 44 are compared with the nominal value, and ± 10
Confirm that the measurement is performed with an accuracy within%, and record the measurement result. As a result, the accuracy can be confirmed using this calibration jig without using a new jig for detecting a change in accuracy, and after the optical adapter is replaced, the indicators 43 and 44 must be used. Measure the length of and compare with the recorded value. This makes it possible to confirm whether or not the optical adapter is attached correctly. In addition, after the endoscopy is completed, the index 4 is always
The length of 3,44 is measured and compared with the recorded value.
With this, it is possible to confirm whether or not the optical adapter is loosened during the inspection.

The shape of the central index 37 is not limited to the hemispherical concave portion, but the central index 37a may be formed by a hemispherical convex portion as shown in FIG. As a result, when dust or the like enters the white concave portion 33, the dust is prevented from accumulating and contaminating the central index 37a.

Further, as shown in FIG. 8, a male screw 33a is provided in the white concave portion 33, and a corresponding female screw 32a is provided in the endoscope guide member 32 so as to be sandwiched between the white concave portion 33 and the direct-view calibration guide 41. By disposing the transparent partition plate 50, the tip end surface of the endoscope 10 can be brought into contact with the contact surface 50a of the partition plate 50 when performing calibration using the direct-viewing stereo measurement optical adapter 2.
It is possible to keep the distance to the center index 37 at a predetermined value by contacting with. As a result, it is possible to more easily keep the photographing conditions for capturing the mask shape constant.

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

[Additional Notes] According to the above-described embodiment of the present invention described in detail above, the following configuration can be obtained.

(1) An endoscope in which an imaging device forming an observation optical system is built in the tip of the elongated insertion portion, and the endoscope insertion portion is detachably attachable to at least a stereo measurement optical adapter. A plurality of optical adapters, an image processing unit that generates a video signal from an image pickup signal transmitted from the image pickup device of the endoscope, and an endoscopic image is displayed by receiving the video signal from the image processing unit. A measurement device including a display device, a calculation processing unit that performs measurement processing from an image pickup signal transmitted from the image pickup device, and a calibration jig for taking in a mask shape of the stereo measurement optical adapter. Endoscope device.

(2) The calibration jig is
2. The measuring endoscope apparatus according to appendix 1, comprising a white concave portion having a white concave portion which is a subject, and a center index provided in a central portion of the white concave portion.

(3) The measuring endoscope apparatus according to appendix 2, wherein the central index is a convex hemispherical portion formed in a predetermined shape and size.

(4) The measuring endoscope apparatus according to appendix 2, wherein the central index is a concave hemispherical portion formed in a predetermined shape and size.

As a result, when the brightness of the screen is gradually increased, the mask shape becomes clear when the convex hemisphere or the concave hemisphere melts into the white depression and becomes invisible. That is, the mask shape can be obtained with the image having the best brightness.

(5) A guide hole is provided at a predetermined position of the calibration jig so that the center of the visual field of the observation optical system of the endoscope faces the central index of the white recess.
The measuring endoscope apparatus according to 1.

(6) The measuring endoscope apparatus according to appendix 3, wherein the diameter of the guide hole is substantially the same as the diameter of the tip portion of the endoscope.

(7) The size of the central index is such that when the central index is displayed as an endoscopic image on the screen of the display device, the size of the central index image is 1/20 to 1/10 of the screen. The measuring endoscope apparatus according to Supplementary Note 3 or Supplementary Note 4, which has a size inscribed in a circle having a diameter within the range.

(8) The measuring endoscope apparatus according to appendix 2, wherein a plate provided with a predetermined scale for detecting a change in accuracy is arranged at a predetermined position of the calibration jig.

(9) The mask shape is taken in by observing the central index of the white concave portion in the endoscope mounting step of mounting the endoscope on the calibration jig and the observation optical system of the mounted endoscope. A central index display step of displaying on a display device, and a white image acquisition step of gradually increasing the amount of illumination light that illuminates the white concave portion and making the central index captured by the observation optical system melt into the white concave portion to make it invisible. The measuring endoscope apparatus according to attachment 1.

[0068]

As described above, according to the present invention, at the time of calibration processing, everybody can obtain an optimum white image, obtain a mask shape with a clear contour, and always perform accurate measurement. It is possible to provide a measuring endoscope apparatus capable of performing the above.

[Brief description of drawings]

1 to 8 relate to one embodiment of the present invention,
FIG. 1 is a diagram for explaining the measurement endoscope apparatus.

FIG. 2 is a block diagram illustrating a configuration of an electric circuit of the measurement endoscope apparatus.

FIG. 3 is a cross-sectional view illustrating the configuration of a calibration jig.

FIG. 4 is a perspective view illustrating a configuration of a calibration jig.

FIG. 5 is a diagram illustrating a state in which a direct-viewing endoscope is attached to a calibration jig.

FIG. 6 is a diagram illustrating a state in which a side-view endoscope is attached to a calibration jig.

FIG. 7 is a diagram illustrating another configuration of the central index.

FIG. 8 is a diagram illustrating another configuration of the calibration jig.

[Explanation of symbols]

3 ... Calibration jig 31 ... Jig body 32 ... Endoscope guide member 33 ... White recess 37 ... Central index 41 ... Calibration guide for direct view 42 ... Side-view calibration guide

Front page continuation (51) Int.Cl. ⁷ identification code FI theme code (reference) G02B 23/26 G02B 23/26 C H04N 7/18 H04N 7/18 MF term (reference) 2H040 AA02 AA03 BA15 BA22 DA52 GA11 4C061 AA00 AA29 BB02 BB06 CC06 DD03 FF40 FF47 GG11 HH47 HH53 JJ20 LL02 NN05 NN07 SS11 SS21 VV03 WW10 WW18 YY02 YY12 5C054 AA05 CH02 EA05 FA02 FC15 FD03 HA05

Claims (3)

[Claims] 1. An endoscope in which an imaging element forming an observation optical system is built in a distal end portion of a slender insertion portion, and a distal end portion of the endoscope insertion portion is detachably attachable and at least a stereo measurement optical adapter. A plurality of optical adapters, an image processing unit that generates a video signal from an image pickup signal transmitted from the image pickup device of the endoscope, and an endoscopic image is displayed by receiving the video signal from the image processing unit. A display device, an arithmetic processing unit that performs a measurement process from an image pickup signal transmitted from the image pickup device, and a calibration jig that captures a mask shape of the stereo measurement optical adapter. Measuring endoscopic device. 2. The calibration jig comprises a white concave portion having a white concave portion, which is a subject, and a central index provided in a central portion of the white concave portion. 1. The measurement endoscope apparatus according to 1. 3. A guide hole is provided at a predetermined position of the calibration jig so that the center of the field of view of the observation optical system of the endoscope faces the center index of the white recess. The measuring endoscope apparatus according to 2.