Color adjustment jig for endoscope

Abstract

To provide a color adjustment jig for endoscope which matches with a plurality of types of outer diameter and a strabismus angle, and which is down-sized.SOLUTION: An insertion part 11 includes insertion holes 11a, 11b in which a tip end part of an endoscope 14 is inserted. The insertion holes 11a, 11b are positioned on a specific plane PL when viewed in X-direction, a direction of the insertion holes 11a, 11b is inclined with respect to an inner plane PN of a cover part 12 when viewed in a Y-direction. On the inner plane PN, the cover part 12 includes a mark 15 of the number less than the value multiplied by the number of types of outer diameter and the number of types of strabismus angle of the endoscope 14.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention relates to a color adjustment jig for an endoscope that is compatible with a variety of outer diameters or oblique viewing angles of endoscopes. [Background technology]

[0002] In the medical field, endoscopes are used for internal observation, endoscopic surgery, and the like. Endoscopes use various electronic components, such as an image sensor for capturing images of the object being observed and various other components for generating images through the capture. These components may have individual differences, deterioration over time, and other factors, making it difficult to obtain appropriate images. Furthermore, the light source used to capture the object being observed may also have individual differences, deterioration over time, and other factors. To resolve these issues and obtain appropriate images, color adjustment processes, such as white balance, are performed on the endoscope.

[0003] For example, when adjusting the white balance with a rigid endoscope used in endoscopic surgery, white sterilized gauze may be photographed. Another known method involves providing a white cap at the tip of the endoscope (Patent Documents 1 and 2). Another known method involves using a cap-shaped white balance adjustment tool (Patent Document 3). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2020-032201 [Patent Document 2] Japanese Patent Application Laid-Open No. 2010-200880 [Patent Document 3] Japanese Patent Application Publication No. 05-076483 Summary of the Invention [Problem to be solved by the invention]

[0005] In recent years, a wide variety of endoscopes have been used in the medical field. For example, endoscopes with multiple types of tip diameters, such as thin and thick, and multiple types of oblique viewing angles, such as straight and oblique, are now in use. There has been a demand for a compact color adjustment tool for endoscopes that can accommodate these multiple types of diameters or oblique viewing angles and is easy to use in actual applications.

[0006] An object of the present invention is to provide a color adjustment jig for an endoscope that is compact and can accommodate a variety of outer diameters or oblique angles. [Means for solving the problem]

[0007] The color adjustment jig for an endoscope of the present invention has a plurality of insertion holes for inserting the tip of the endoscope, each of which is provided according to the outer diameter type of the endoscope, and when viewed from a first direction, the plurality of insertion holes exist on a specific plane, and when viewed from a second direction, the orientation of at least one of the insertion holes is inclined with respect to the inner surface of the lid, an insertion section, a lid section arranged opposite the insertion section in the insertion direction of the tip, and an outer peripheral section that forms an internal space with the insertion section and the lid section by contacting them, and the lid section has a number of marks on its inner surface facing the internal space that is less than the product of the number of outer diameter types of the endoscope and the number of types of oblique angle.

[0008] If the number of outer diameter types of the endoscope is four or less, it is preferable that the number of marks is the same as or less than the number of oblique angle types. If the number of outer diameter types of the endoscope is two, it is preferable that the number of marks is two. If the number of oblique angle types of the endoscope is three, it is preferable that the number of marks is two or three.

[0009] When the number of outer diameter types of the endoscope is 5 to 12, the number of marks is preferably greater than the number of oblique angle types. When the number of oblique angle types is 2, the number of marks is preferably 3. When the number of oblique angle types is 3, the number of marks is preferably 4.

[0010] The specific plane is preferably along the central axis of the cover portion. The specific plane is preferably off the central axis of the cover portion, and the peripheral shape of an image obtained by photographing the mark with an endoscope is preferably different depending on the outer diameter type of the endoscope. The cover portion and the peripheral portion are preferably separably connected. [Effects of the Invention]

[0011] According to the present invention, it is possible to accommodate a plurality of types of outer diameters or oblique angles, and to reduce the size. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a schematic diagram of a color adjustment jig for an endoscope. [Figure 2] FIG. 2 is an explanatory diagram showing the outer diameter of the tip of the endoscope. [Figure 3] FIG. 2 is an explanatory diagram showing the oblique angle of the endoscope. [Figure 4] FIG. 2 is a schematic diagram of the color adjustment jig for an endoscope when viewed from the X direction. [Figure 5] FIG. 2 is a schematic diagram of the color adjustment jig for an endoscope when viewed from the Y direction. [Figure 6] FIG. 2 is a schematic diagram of the color adjustment tool for an endoscope when viewed from the Z direction. [Figure 7] 3 is an explanatory diagram showing a mark image captured by a small-diameter or large-diameter, direct-view or oblique-view endoscope in the first embodiment. FIG. [Figure 8] 1 is a schematic diagram of an endoscope system including an endoscope. [Figure 9] FIG. 10 is a schematic diagram of a color adjustment jig for an endoscope as a comparative example. [Figure 10] 10 is a schematic diagram of a color adjustment jig for an endoscope according to a second embodiment, as viewed from the X direction. FIG. [Figure 11] FIG. 10 is a schematic diagram of a color adjustment jig for an endoscope according to a second embodiment, as viewed from the Z direction. [Figure 12] 10A and 10B are explanatory diagrams showing mark images captured by a thin or thick diameter, direct or oblique endoscope in the second embodiment. [Figure 13]10A and 10B are explanatory diagrams showing mark images captured by a thin-diameter or thick-diameter, direct-view or oblique-view endoscope in the third embodiment. [Figure 14] FIG. 1 is an explanatory diagram showing N marks arranged at intervals divided into N−1 parts. [Figure 15] 10 is an explanatory diagram showing the orientation of an insertion hole and its relationship with a mark in the fourth embodiment. FIG. [Figure 16] 13 is an explanatory diagram showing the orientation of an insertion hole and its relationship with a mark in the fifth embodiment. FIG. [Figure 17] 13 is an explanatory diagram showing the orientation of an insertion hole and its relationship with a mark in the sixth embodiment. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0013] [First embodiment] As shown in FIG. 1, the endoscope color adjustment jig 10 is a tool used for adjusting the color of multiple types of endoscopes, and comprises an insertion section 11, a lid section 12, and an outer periphery 13. The insertion section 11 has at least one insertion hole into which the tip of an endoscope 14 is inserted. The lid section 12 is disposed opposite the insertion section 11 in the insertion direction of the tip of the endoscope 14. The outer periphery 13 contacts the insertion section 11 and the lid section 12, thereby forming an internal space with them. The lid section 12 has marks 15 on its inner surface facing the internal space, which are used by the endoscope 14 to photograph and adjust the color. The lid section 12 and the outer periphery 13 are separably connected. Note that the endoscope 14 The insertion direction of the tip is determined by the direction DH of the insertion hole.

[0014] The endoscopic color adjustment jig 10 is capable of adjusting the color of endoscopes 14 with multiple outer diameters or multiple oblique angles. The outer diameter of the endoscope 14 is determined by the diameter D1 of the tip 14a of the endoscope 14, as shown in FIG. 2. A small-diameter endoscope 14 with a small diameter D1 is used for transnasal endoscopes, while a large-diameter endoscope 14 with a large diameter D1 is used for oral endoscopes. The oblique angle of the endoscope 14 is determined by the angle θ of the optical axis direction AY of the imaging optical system 14b relative to the axial direction AX of the tip 14a of the endoscope 14, as shown in FIG. 3. An endoscope 14 with an angle θ of 0 is called a direct endoscope, and an endoscope 14 with an angle θ greater than 0° is called an oblique endoscope.

[0015] The insertion section 11 is provided with insertion holes corresponding to the outer diameter type of the endoscope 14. In the insertion section 11, as shown in Fig. 4, the multiple insertion holes exist on a specific plane PL when viewed from the first direction X (see Fig. 1), and as shown in Fig. 5, when viewed from the second direction Y (see Fig. 4), the orientation of at least one insertion hole is inclined with respect to the inner surface of the cover section 12. Here, "at least one insertion hole that is not parallel" means that the orientation DH of the insertion hole is not parallel with, but inclined with respect to, the inner surface PN (mark installation surface) of the cover section 12.

[0016] In the first embodiment, insertion holes 11a and 11b are provided in accordance with the outer diameter type 2 of the endoscope 14. The insertion holes 11a and 11b exist on a specific plane PL, and the orientations DH1 and DH2 of the insertion holes 11a and 11b are each inclined with respect to the inner surface PN of the cover portion 12. The specific plane PL is along the central axis CL of the cover portion 12. The orientation DH1 of the insertion hole 11a and the orientation DH2 of the insertion hole 11b are each symmetrical with respect to the Z direction, which is a third direction perpendicular to the first and second directions.

[0017] The number of marks 15 is less than the product of the number of outer diameter types of the endoscope and the number of oblique angle types. Furthermore, when the number of outer diameter types of the endoscope 14 is four or less, it is preferable that the number of marks 15 is the same as or less than the number of oblique angle types. In the first embodiment, as shown in FIG. 6, when the number of outer diameter types of the endoscope is two and two insertion holes 11a, 11b are provided in the insertion section 11, the number of marks 15 is set to two, and marks 15a, 15b are provided as the marks 15.

[0018] In this case, as shown in Fig. 7(A), when the endoscope 14 has a small outer diameter and is at a straight oblique viewing angle, the endoscope 14 inserted into the insertion hole 11a in the direction DH1 captures an image of the mark 15b, thereby obtaining a mark image 20. Also, as shown in Fig. 7(B), when the endoscope 14 has a small outer diameter and is at a straight oblique viewing angle, the endoscope 14 inserted into the insertion hole 11a in the direction DH1 captures an image of the mark 15a, thereby obtaining a mark image 21.

[0019] 7(C), when the endoscope 14 is of a large diameter and has a direct oblique viewing angle, the endoscope 14 inserted into the insertion hole 11b in the direction DH2 captures an image of the mark 15a, thereby obtaining a mark image 22. Furthermore, when the endoscope 14 is of a large diameter and has a direct oblique viewing angle, the endoscope 14 inserted into the insertion hole 11b in the direction DH2 captures an image of the mark 15b, thereby obtaining a mark image 23, thereby obtaining a mark image 23.

[0020] The mark images 20 to 23 obtained as described above are transmitted to a processor device 31 of an endoscope system 30 connected to the endoscope 14, as shown in FIG. 8. The processor device 31 controls the display of the mark images 20 to 23 on a display 32 based on the mark images 20 to 23. The processor device 31 performs various color adjustments, such as white balance, using image feature quantities of the marks 15a and 15b. Furthermore, the mark images 20 and 21 have different peripheral shapes, with one being a trapezoid whose upper side is smaller than its lower side and the other being a trapezoid whose upper side is larger than its lower side. Therefore, the type of oblique angle can be determined from the mark images 20 and 21. The endoscope system 30 is provided with a light source device 33 that supplies illumination light to the endoscope 14. The same applies to the mark images 22 and 23.

[0021] In a comparative example of the color adjustment jig 2 for endoscopes compared to the first embodiment, as shown in FIG. 9 , four marks may be provided when the outer diameter type and oblique viewing angle type of the endoscope 14 are two (insertion hole 3a corresponds to a small diameter, and insertion hole 3b corresponds to a large diameter). In this case, one mark is assigned to each outer diameter type and oblique viewing angle, and the marks 15 are not shared. This increases the installation area for the marks 15, making it difficult to miniaturize the color adjustment jig 10 for endoscopes. On the other hand, in the first embodiment of the present application, the mark 15a is shared by inserting the insertion section 11 into the insertion hole 11a differently from the insertion hole 11b in the case of a large-diameter, direct-view endoscope 14 and a small-diameter, oblique-view endoscope 14. Similarly, the mark 15b can be shared between the large-diameter, oblique-view endoscope 14 and the small-diameter, direct-view endoscope 14. Therefore, the color adjustment jig 10 for an endoscope of the present application can reduce the installation area of ​​the mark 15 compared to the comparative example, thereby achieving miniaturization.

[0022] [Second embodiment] In the first embodiment, the specific plane PL on which the multiple insertion holes exist is aligned with the central axis CL of the cover portion 12, but in the second embodiment, the specific plane is deviated from the central axis CL of the cover portion 12. This allows the outer peripheral shape of the mark image obtained by the endoscope 14 capturing an image of the mark 15 to differ depending on the outer diameter type of the endoscope 14.

[0023] 10, when the number of outer diameter types of the endoscope is two, two insertion holes 11a and 11b are provided in the insertion section 11, and marks 15a and 15b are provided as the marks 15, the insertion holes 11a and 11b are provided so that the specific plane PL on which the insertion holes 11a and 11b exist is offset from the central axis CL of the cover section 12. Accordingly, as shown in FIG.

[0024] In this case, as shown in Fig. 12(A), when the endoscope 14 is of a small diameter and inserted into the insertion hole 11a in the direction DH1 at a straight oblique angle, a mark image 40 is obtained whose outer peripheral shape is a right-angled trapezoid whose upper side is smaller than the lower side (the right angle is on the right). Also, as shown in Fig. 12(B), when the endoscope 14 is of a small diameter and inserted into the insertion hole 11a in the direction DH1 at a straight oblique angle, a mark image 41 is obtained whose outer peripheral shape is a right-angled trapezoid whose upper side is larger than the lower side (the right angle is on the right). Also, as shown in Fig. 12(C), when the endoscope 14 is of a large diameter and inserted into the insertion hole 11b in the direction DH2 at a straight oblique angle, a mark image 42 is obtained whose outer peripheral shape is a right-angled trapezoid whose upper side is smaller than the lower side (the right angle is on the left). Also, as shown in Figure 12(D), when the endoscope 14 is inserted into the insertion hole 11b with a large outer diameter and an oblique viewing angle in a direction DH2, a mark image 43 is obtained whose outer peripheral shape is a right-angled trapezoid with the upper side larger than the lower side (the right angle is on the left side).

[0025] As shown in the mark images 40 to 43, the outer peripheral shapes of the respective marks are different, and the outer diameter type or oblique angle type of the endoscope 14 can be determined from these outer peripheral shapes.

[0026] [Third embodiment] In the third embodiment, a case will be described in which the endoscope 14 has an outer diameter type of 2 and an oblique angle type of 3. In this case, the two insertion holes 11a and 11b are provided in the insertion section 11, and marks 15a and 15b are provided as the marks 15, which are the same as in the first embodiment. However, the difference is that the same marks 15a and 15b are imaged even when the oblique angle type is different.

[0027] As shown in Fig. 13(A), when the endoscope 14 is of a small diameter and has a direct oblique viewing angle, the endoscope 14 inserted into the insertion hole 11a in the direction DH1 captures an image of the mark 15b, thereby obtaining a mark image 50. Also, as shown in Fig. 13(B), when the endoscope 14 is of a small diameter and has a 30° oblique viewing angle, the endoscope 14 inserted into the insertion hole 11a in the direction DH1 captures an image of the mark 15a, thereby obtaining a mark image 51. Also, as shown in Fig. 13(C), when the endoscope 14 is of a small diameter and has a 45° oblique viewing angle, the endoscope 14 inserted into the insertion hole 11a in the direction DH1 captures an image of the mark 15a, thereby obtaining a mark image 52.

[0028] 13(D), when the endoscope 14 has a large outer diameter and is at a direct oblique viewing angle, the endoscope 14 inserted into the insertion hole 11b in the direction DH2 captures an image of the mark 15a, thereby obtaining a mark image 53. When the endoscope 14 has a large outer diameter and is at a 30° oblique viewing angle, the endoscope 14 inserted into the insertion hole 11b in the direction DH2 captures an image of the mark 15b, thereby obtaining a mark image 54. When the endoscope 14 has a large outer diameter and is at a 45° oblique viewing angle, the endoscope 14 inserted into the insertion hole 11b in the direction DH2 captures an image of the mark 15b, thereby obtaining a mark image 55.

[0029] The outer periphery of mark image 50 is a trapezoid with the top side smaller than the bottom side, while the outer periphery of mark image 51 and mark image 52 is a trapezoid with the top side larger than the bottom side. In both mark image 50 and mark image 51, the mark is clearly visible enough to allow color adjustment processing. On the other hand, in mark image 52, although the mark is shifted upward, it is still visible enough to allow color adjustment processing. Therefore, color adjustment processing can be performed on mark images 50 to 52.

[0030] The outer periphery of mark image 53 is a trapezoid with the top side smaller than the bottom side, while the outer periphery of mark images 54 and 55 is a trapezoid with the top side larger than the bottom side. In both mark images 53 and 54, the mark is clearly visible enough to allow color adjustment processing. On the other hand, in mark image 55, although the mark is shifted upward, it is still visible enough to allow color adjustment processing. Therefore, color adjustment processing can be performed on mark images 53 to 55.

[0031] As shown in FIG. 9 , a comparative example of the endoscope color adjustment jig 2 for comparison with the third embodiment may have four marks when the endoscope 14 has an outer diameter type 2 and an oblique viewing angle type 2. In this case, one mark is assigned for each outer diameter type and oblique viewing angle for direct viewing, while a mark is shared between an oblique viewing angle of 30° and an oblique viewing angle of 45°. Even if mark 15 is shared between an oblique viewing angle of 30° and an oblique viewing angle of 45°, the installation area of ​​mark 15 is large, making it difficult to miniaturize the endoscope color adjustment jig 10. In contrast, in the third embodiment of the present application, mark 15a is shared not only for a small diameter and an oblique viewing angle of 30° and an oblique viewing angle of 45°, but also for a large diameter and direct viewing. Similarly, mark 15b is shared between a large diameter and an oblique viewing angle of 30° and an oblique viewing angle of 45°, and a small diameter and direct viewing. Therefore, the color adjustment jig for endoscopes 10 of the present application can be made smaller than the comparative example because the installation area of ​​the marks 15 can be made smaller. The type of oblique angle can be determined based on the marks 50 to 55.

[0032] To improve the accuracy of the color adjustment process, it is preferable that the number of marks 15 be the same as the number of oblique angle types when the number of outer diameter types of the endoscope 14 is four or less. For example, when there are three oblique angle types, it is preferable that the number of marks 15 be three. Furthermore, when there are N oblique angle types, it is preferable that the number of marks 15 be N. In this case, it is preferable to divide the interval between the marks 15 into N-1 parts and arrange N marks 15, as shown in FIG.

[0033] [Fourth embodiment] In the fourth embodiment, a case will be described in which the endoscope 14 has an outer diameter type of 3 or 4 and two oblique angle types, straight vision and oblique vision. In this case, for example, when the outer diameter type is 4, it is preferable to provide four insertion holes and two marks. In Fig. 15, four insertion holes having directions DH1, DH2, DH3, and DH4 are shown, and the portions where the directions DH1 to DH4 intersect with the line LX represent the insertion entrances of the four insertion holes.

[0034] An endoscope 14 inserted into an insertion hole in direction DH1 images mark 15b when viewed directly and images mark 15a when viewed obliquely. An endoscope 14 inserted into an insertion hole in direction DH2 images mark 15a when viewed directly and images mark 15b when viewed obliquely. An endoscope 14 inserted into an insertion hole in direction DH3 images mark 15b when viewed directly and images mark 15a when viewed obliquely. An endoscope 14 inserted into an insertion hole in direction DH4 images mark 15a when viewed directly and images mark 15b when viewed obliquely.

[0035] When the outer diameter type is 3 or 4 and the number of oblique angles is N, it is preferable to set the number of marks 15 to N. In this case, as shown in FIG. 14, it is preferable to divide the interval between the marks 15 into N-1 parts and arrange N marks 15.

[0036] [Fifth embodiment] In the fifth embodiment, a case will be described in which the endoscope 14 has outer diameter types 5 to 7 and two oblique angle types: straight vision and oblique vision. In this case, for example, when the outer diameter type is 7, it is preferable to provide seven insertion holes and at least three marks. If there are two marks, it may not be possible to reliably capture images of the marks, so at least three marks are required. Figure 16 shows seven insertion holes with directions DH1, DH2, DH3, DH4, DH5, DH6, and DH7, and the intersections of the directions D1 to D7 and the line LX represent the insertion entrances of the seven insertion holes.

[0037] An endoscope 14 inserted into an insertion hole in the direction DH1 images mark 15b when viewed directly, and images mark 15a or mark 15c when viewed obliquely. An endoscope 14 inserted into an insertion hole in the direction DH2 images mark 15a when viewed directly, and images mark 15b or mark 15c when viewed obliquely. An endoscope 14 inserted into an insertion hole in the direction DH3 images mark 15c when viewed directly, and images mark 15b or mark 15a when viewed obliquely. An endoscope 14 inserted into an insertion hole in the direction DH4 images mark 15b when viewed directly, and images mark 15a or mark 15c when viewed obliquely. An endoscope 14 inserted into an insertion hole in the direction DH5 images mark 15a when viewed directly, and images mark 15b or mark 15c when viewed obliquely. The endoscope 14 inserted into the insertion hole in the direction DH6 images the mark 15c in the case of direct vision and images the mark 15b or the mark 15a in the case of oblique vision. The endoscope 14 inserted into the insertion hole in the direction DH7 images the mark 15b in the case of direct vision and images the mark 15a or the mark 15c in the case of oblique vision.

[0038] [Sixth embodiment] In the sixth embodiment, a case will be described in which the endoscope 14 has outer diameter types 5 to 12 and three oblique angle types: straight vision, first oblique vision, and second oblique vision (the oblique angle of the first oblique vision is smaller than the oblique angle of the second oblique vision). In this case, for example, when the outer diameter type is 12, it is preferable to provide 12 insertion holes and at least four marks. If there are two or three marks, it may not be possible to reliably capture images of the marks, so at least four marks are required. Figure 17 shows 12 insertion holes having directions DH1 to DH12, and the intersections of the directions DH1 to DH12 and the line LX represent the insertion entrances of these 12 insertion holes.

[0039] An endoscope 14 inserted into the insertion hole in the direction DH1 images mark 15b when viewed directly, images mark 15a or mark 15c when viewed from the first oblique angle, and images mark 15d when viewed from the second oblique angle. An endoscope 14 inserted into the insertion hole in the direction DH2 images mark 15a when viewed directly, images mark 15b when viewed from the first oblique angle, and images mark 15c when viewed from the second oblique angle. An endoscope 14 inserted into the insertion hole in the direction DH3 images mark 15d when viewed directly, images mark 15c when viewed from the first oblique angle, and images mark 15b when viewed from the second oblique angle.

[0040] An endoscope 14 inserted into the insertion hole in the direction DH4 images mark 15c when viewed directly, images mark 15b or mark 15d when viewed from the first oblique angle, and images mark 15a when viewed from the second oblique angle. An endoscope 14 inserted into the insertion hole in the direction DH5 images mark 15b when viewed directly, images mark 15a or mark 15c when viewed from the first oblique angle, and images mark 15d when viewed from the second oblique angle. An endoscope 14 inserted into the insertion hole in the direction DH6 images mark 15a when viewed directly, images mark 15b when viewed from the first oblique angle, and images mark 15c when viewed from the second oblique angle.

[0041] An endoscope 14 inserted into the insertion hole in direction DH7 images mark 15d when viewed directly, images mark 15c when viewed from the first oblique angle, and images mark 15b when viewed from the second oblique angle. An endoscope 14 inserted into the insertion hole in direction DH8 images mark 15c when viewed directly, images mark 15b or mark 15d when viewed from the first oblique angle, and images mark 15a when viewed from the second oblique angle. An endoscope 14 inserted into the insertion hole in direction DH9 images mark 15b when viewed directly, images mark 15a or mark 15c when viewed from the first oblique angle, and images mark 15d when viewed from the second oblique angle.

[0042] An endoscope 14 inserted into an insertion hole in direction DH10 images mark 15a when viewed directly, images mark 15b when viewed from the first oblique angle, and images mark 15c when viewed from the second oblique angle. An endoscope 14 inserted into an insertion hole in direction DH11 images mark 15d when viewed directly, images mark 15c when viewed from the first oblique angle, and images mark 15b when viewed from the second oblique angle. An endoscope 14 inserted into an insertion hole in direction DH12 images mark 15c when viewed directly, images mark 15b or mark 15d when viewed from the first oblique angle, and images mark 15a when viewed from the second oblique angle.

[0043] Next, the endoscope color adjustment method will be described below. First, the tip of the endoscope 14 is inserted into the insertion section 11, in which the insertion holes exist on a specific plane PL when viewed from the first direction X, and at least one of the insertion hole directions DH is inclined with respect to the mark installation surface (inner surface PN) when viewed from the second direction Y. Next, the endoscope 14 photographs marks on the inner surface of the cover 12 facing the internal space, the number of which is less than the product of the number of outer diameter types and the number of oblique angle types of the endoscope 14, and color adjustment is performed based on the images obtained by photographing. [Explanation of symbols]

[0044] 2. Endoscope color adjustment jig 3a, 3b insertion hole 10. Endoscope color adjustment jig 11 Insertion section 11a, 11b insertion holes 12 Lid 13 Outer periphery 14 Endoscopy 14a Tip 14b Imaging optical system 15, 15a, 15b, 15c, 15d marks 20~23 Mark image 30 Endoscopy System 31 Processor unit 32 Display 33 Light source device 40~43 Mark image 50~55 mark image D1 diameter Suitable for DH, DH1 to DH12 AX Axial direction AY Optical axis direction PL specific plane CL center axis PN inner surface LX Line

Claims

1. an insertion section including a plurality of insertion holes into which the distal end portions of the endoscopes are inserted, the insertion holes being provided in accordance with the outer diameter types of the endoscopes; a cover portion disposed opposite the insertion portion in the insertion direction of the tip portion; an outer circumferential portion that contacts the insertion portion and the lid portion to form an internal space therewith; the cover portion has marks on an inner surface facing the internal space, the number of marks being less than the product of the number of outer diameter types of the endoscope and the number of oblique angle types; When viewed from a first direction, the insertion portion has multiple insertion holes that exist on a specific plane, and when viewed from a second direction, the orientation of at least one insertion hole is inclined with respect to the inner surface of the cover portion.

2. 2. The color adjustment jig for an endoscope according to claim 1, wherein when the number of outer diameter types of the endoscope is four or less, the number of the marks is the same as or less than the number of the oblique angle types.

3. 3. The color adjustment jig for an endoscope according to claim 2, wherein when the number of outer diameter types of the endoscope is two, the number of the marks is two.

4. 3. The color adjustment jig for an endoscope according to claim 2, wherein when the number of oblique angles of the endoscope is three, the number of the marks is three or two.

5. 2. The color adjustment jig for an endoscope according to claim 1, wherein when the number of types of outer diameters of the endoscope is 5 to 12, the number of the marks is greater than the number of types of oblique angles.

6. 6. The color adjustment jig for an endoscope according to claim 5, wherein when the number of types of oblique angles is two, the number of marks is three.

7. 6. The color adjustment jig for an endoscope according to claim 5, wherein when the number of types of oblique angles is three, the number of marks is four.

8. 8. The color adjustment jig for an endoscope according to claim 1, wherein the specific plane is aligned with the central axis of the lid portion.

9. 8. A color adjustment jig for an endoscope according to claim 1, wherein the specific plane is offset from the central axis of the lid portion, and the peripheral shape of the image obtained by photographing the mark with the endoscope differs depending on the outer diameter type of the endoscope.

10. The color adjustment jig for an endoscope according to claim 1 , wherein the cover portion and the outer circumferential portion are separably connected.

Images