Optical device and medical observation device

Abstract

An optical device according to an embodiment comprises: an optical component; a holding member for holding the optical component; and an adhesive member for adhering the optical component to the holding member. The holding member has an accommodating part for accommodating the adhesive member. The accommodating part includes a plurality of accommodating chambers that accommodate the adhesive member so as to allow the adhesive member to be in contact with the optical component.

Description

Optical devices and medical observation devices

[0001] The present disclosure relates to optical devices and medical observation devices.

[0002] Optical components such as prisms are sometimes bonded to other components, such as cover glasses or prism holders, using adhesive (see, for example, Patent Document 1). One bonding method is a seating surface bonding method, in which the underside (seat) of the optical component is bonded to the other component. With this seating surface bonding method, controlling the thickness of the adhesive layer is difficult. This can lead to adhesive leakage due to excessive application of adhesive. Furthermore, if the adhesive layer is made thin to ensure accurate retention of the optical component, it becomes difficult to ensure elasticity, which can lead to damage to the optical component due to sudden temperature changes. To prevent such adhesive leakage and damage to the optical component, an edge bonding method has been proposed, in which the side (edge) of an optical component placed on another component is bonded to the mounting surface of the other component.

[0003] Japanese Patent Application Laid-Open No. 2018-201698

[0004] However, the edge bonding method described above has a lower adhesive strength between the optical component and other members than the seat bonding method described above, and therefore there is a demand for an improvement in adhesive strength.

[0005] Therefore, the present disclosure proposes an optical device and a medical observation device that can achieve improved adhesive strength.

[0006] An optical device according to an embodiment comprises an optical component, a holding member for holding the optical component, and an adhesive member for adhering the optical component to the holding member, wherein the holding member has a storage section for storing the adhesive member, and the storage section includes a plurality of storage chambers for respectively storing the adhesive member in contact with the optical component.

[0007] A medical observation device according to an embodiment includes an optical device and an imaging element, the optical device including optical components, a holding member that holds the optical components, and adhesive members that adhere the optical components to the holding member, the holding member having a storage section that stores the adhesive members, and the storage section including a plurality of storage chambers that respectively store the adhesive members in contact with the optical components.

[0008] 1 is a perspective view showing an example of the configuration of an optical device according to a first embodiment; FIG. 2 is a side view showing an example of the configuration of an optical device according to the first embodiment; FIG. 3 is a side view showing a reflective surface of a color separation prism according to the first embodiment; FIG. 4 is a plan view showing a surface other than the reflective surface of a color separation prism according to the first embodiment; FIG. 5 is a plan view showing an example of the configuration of a storage section according to the first embodiment; FIG. 6 is a front view showing an example of the configuration of a storage section according to the first embodiment; FIG. 7 is a view for explaining the roles of a plurality of storage chambers according to the first embodiment; FIG. 8 is a view for explaining the role of a connecting chamber according to the first embodiment; FIG. 9 is a perspective view showing an example of the configuration of a storage section according to the first embodiment; FIG. 10 is a view for explaining the role of an inclined surface of a storage chamber according to the first embodiment; FIG. 11 is a perspective view showing an example of the configuration of a storage section according to the first embodiment; FIG. 12 is a view for explaining the role of an inclined surface of a wall according to the first embodiment; FIG. 13 is a perspective view showing an example of the configuration of an optical device according to a second embodiment; FIG. 14 is a view showing the storage section (dimensions) of an optical device according to any of the above-mentioned embodiments; FIG. 15 is a view showing the storage section (angles) of an optical device according to any of the above-mentioned embodiments; FIG. 16 is a view showing design values ​​of the storage section of an optical device according to any of the above-mentioned embodiments; FIG. 17 is a view showing an example of the schematic configuration of an endoscope system; Fig. 20 is a block diagram showing an example of the functional configuration of the camera and the CCU shown in Fig. 19. Fig. 21 is a diagram showing an example of the schematic configuration of a microsurgery system.

[0009] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. The embodiments include examples and modified examples. Note that the embodiments of the present disclosure do not limit the devices, equipment, methods, etc. related to the present disclosure. Furthermore, in the following embodiments, essentially identical components are designated by the same reference numerals, and redundant explanations will be omitted.

[0010] The present disclosure will be described in the following order: 1. First embodiment 1-1. Configuration example of optical device 1-2. Reflecting surface of color separation prism 1-3. Configuration example of storage section 2. Second embodiment 2-1. Configuration example of optical device 3. Examples 4. Functions and effects according to each embodiment 5. Other embodiments 6. Application examples 7. Application examples 8. Supplementary notes

[0011] <1. First Embodiment> <1-1. Configuration Example of Optical Device> A configuration example of an optical device 1A according to this embodiment will be described with reference to Fig. 1 and Fig. 2. Fig. 1 is a perspective view showing the configuration example of the optical device 1A according to this embodiment. Fig. 2 is a side view showing the configuration example of the optical device 1A according to this embodiment.

[0012] 1 and 2, the optical device 1A according to this embodiment includes a color separation prism 10, a holding member 20, a plurality of adhesive members 31 and 32 (see FIG. 1), and a plurality of image pickup elements 41 and 42 (see FIG. 2). In the example of FIG. 1, a first adhesive member 31 and a second adhesive member 32 are shown. In the example of FIG. 2, a first image pickup element 41 and a second image pickup element 42 are shown.

[0013] As shown in Fig. 2, the color separation prism 10 separates the optical path L10 into an optical path L11 (optical path of visible light) through which visible light reaches the first image sensor 41 and an optical path L12 (optical path of infrared light) through which infrared light reaches the second image sensor 42. In the example of Fig. 2, the color separation prism 10 reflects the visible light to generate the optical path L11 for visible light, and causes the infrared light to travel straight ahead to generate the optical path L12 for infrared light. The color separation prism 10 is an example of an optical component.

[0014] For example, the color separation prism 10 is composed of two prisms 11 and 12. The prisms 11 and 12 are joined together via a dichroic film (not shown). This color separation prism 10 is called a dichroic prism. In the example of FIG. 2, the dichroic prism is configured to reflect visible light and allow infrared light to travel in a straight line, but it may also be configured to reflect infrared light and allow visible light to travel in a straight line, for example.

[0015] The holding member 20 holds the color separation prism 10. For example, the holding member 20 fixes and holds the color separation prism 10 in a predetermined position using a first adhesive member 31 and a second adhesive member 32. In the example of Fig. 1, the holding member 20 is formed in the shape of a rectangular frame having an opening 20a. Note that the optical path L10 passes through the opening 20a.

[0016] As shown in Fig. 1, the holding member 20 has a plurality of storage sections 21, 22. In the example of Fig. 1, a first storage section 21 and a second storage section 22 are shown. The first storage section 21 and the second storage section 22 are provided in opposing positions with an opening 20a in between. The first storage section 21 stores a first adhesive member 31. The second storage section 22 stores a second adhesive member 32. The first storage section 21 and the second storage section 22 will be described in detail later.

[0017] The first adhesive member 31 bonds the color separation prism 10 to the holding member 20. The first adhesive member 31 is formed, for example, by filling the first housing portion 21 with an adhesive and curing it after filling. The adhesive filled in the first housing portion 21 hardens while adhering to the side surface of the color separation prism 10, so the color separation prism 10 is bonded to the holding member 20 by the first adhesive member 31. For example, a UV (ultraviolet) curing adhesive such as a modified acrylate-based adhesive is used as the adhesive. The UV curing adhesive is an adhesive that is cured by UV irradiation for about several tens of seconds. In addition, the UV curing adhesive has moderate elasticity and is suitable for bonding different materials together.

[0018] The second adhesive member 32, together with the first adhesive member 31, adheres the color separation prism 10 to the holding member 20. Like the first adhesive member 31, the second adhesive member 32 is formed by, for example, filling the first housing portion 21 with an adhesive and then curing the adhesive. The adhesive filled in the second housing portion 22 is cured while adhering to the side surface of the color separation prism 10, so the color separation prism 10 is joined to the holding member 20 by the second adhesive member 32 in addition to the first adhesive member 31. Like the first adhesive member 31, the adhesive may be a UV-curable adhesive such as a modified acrylate adhesive. The second adhesive member 32 is formed from the same material as the first adhesive member 31, but may also be formed from a different material.

[0019] The first imaging element 41 is a visible light imaging element that is disposed at the visible light imaging position of the color separation prism 10 and captures visible light. This first imaging element 41 is configured, for example, with an imaging element provided with a filter that blocks infrared light. As this imaging element, for example, a CMOS (Complementary Metal Oxide Semiconductor) type imaging element is used.

[0020] The second imaging element 42 is an infrared imaging element that is disposed at the infrared light imaging position of the color separation prism 10 and captures an image of infrared light. This second imaging element 42 is configured, for example, with an imaging element provided with a filter that blocks visible light. As described above, for example, a CMOS type imaging element is used as this imaging element.

[0021] The material of the color separation prism 10 is not particularly limited, and known optical glass or optical crystal may be used as appropriate depending on the wavelength of the light guided inside the color separation prism 10. Furthermore, optical components other than the color separation prism 10 (for example, optical lenses, filters, etc.) may be held by the holding member 20.

[0022] Furthermore, in addition to a UV-curable adhesive, a thermosetting adhesive such as an epoxy-based adhesive may be used as the adhesive used for each of the first adhesive member 31 and the second adhesive member 32. A thermosetting adhesive has extremely high adhesive strength and can be cured even in a sealed location, for example.

[0023] Furthermore, although the first imaging element 41 and the second imaging element 42 are each integrated with the color separation prism 10, they may be separate elements. Furthermore, the first imaging element 41 and the second imaging element 42 may each be an imaging element that captures light in a wavelength band other than the above-mentioned visible light and infrared light.

[0024] <1-2. Reflective Surface of Color Separation Prism> The reflective surface (light-reflecting surface) M1 of the color separation prism 10 according to this embodiment will be described with reference to Fig. 3 and Fig. 4. Fig. 3 is a side view showing the reflective surface M1 of the color separation prism 10 according to this embodiment. Fig. 4 is a plan view showing a surface M2 other than the reflective surface M1 of the color separation prism 10 according to this embodiment.

[0025] As shown in Fig. 3, the color separation prism 10 has a plurality of reflecting surfaces M1. Each of these reflecting surfaces M1 is a surface that reflects light and is provided to guide light to the first image sensor 41 or the second image sensor 42 (see Fig. 2). In the example of Fig. 3, the number of reflecting surfaces M1 is four, and the four reflecting surfaces M1 include an XY plane (a plane parallel to the X-axis and Y-axis), a plane inclined relative to the XY plane, and two XZ planes (planes parallel to the X-axis and Z-axis).

[0026] As shown in Fig. 4, the color separation prism 10 has a plurality of surfaces M2 other than each reflecting surface M1. Each of these surfaces M2 is a surface (a side surface of the color separation prism 10) that does not affect the light reflection of the color separation prism 10. In the example of Fig. 4, there are two surfaces M2 other than the reflecting surface M1, and the two surfaces M2 include two YZ planes (planes parallel to the Y axis and the Z axis).

[0027] In this color separation prism 10, the first adhesive member 31 and the second adhesive member 32 are provided so as to avoid the respective reflecting surfaces M1 and to contact the respective surfaces M2 of the color separation prism 10 (see FIG. 4). This makes it possible to suppress the influence of the first adhesive member 31 and the second adhesive member 32 on the light reflection of the color separation prism 10.

[0028] 1-3. Configuration Examples of Storage Units Configuration examples of the first storage unit 21 and the second storage unit 22 according to this embodiment will be described with reference to Figs. 5 to 12. The first storage unit 21 and the second storage unit 22 basically have the same structure. Figs. 5 to 8 describe the first storage unit 21, and Figs. 9 to 12 describe the second storage unit 22, but both descriptions are common to the first storage unit 21 and the second storage unit 22.

[0029] Fig. 5 is a plan view showing an example of the configuration of the first storage section 21 according to this embodiment. Fig. 6 is a front view showing an example of the configuration of the first storage section 21 according to this embodiment. In the examples of Fig. 5 and Fig. 6, the first adhesive member 31 is not shown.

[0030] 5 and 6, the first storage section 21 includes a plurality of storage chambers 21a and a connecting chamber 21b. In the example of Fig. 5 and Fig. 6, the number of storage chambers 21a is four.

[0031] Each of the storage chambers 21a stores the first adhesive member 31 in contact with the side surface of the color separation prism 10. These storage chambers 21a are chambers that are open on the top side (upper side in FIG. 6 ) and the front side. The front side is the color separation prism 10 side. The storage chambers 21a are lined up in a row in the Y-axis direction and separated by multiple walls 21c.

[0032] Each of the storage chambers 21a has a wall M11 and a bottom M12. The wall M11 is a wall that opens toward the color separation prism 10. The bottom M12 is a bottom that connects to the wall M11. In the example of FIG. 5 , the wall M11 of each of the storage chambers 21a is formed in a U-shape in a plan view. The wall M11 opens toward the color separation prism 10, and the first adhesive member 31 in the storage chamber 21a is adhered to the color separation prism 10 through the opening.

[0033] The connecting chamber 21b is located above the first housing portion 21, i.e., above each housing chamber 21a, and connects the housing chambers 21a. Similarly to each housing chamber 21a, the connecting chamber 21b accommodates the first adhesive member 31 in contact with the side surface of the color separation prism 10. The connecting chamber 21b is formed to extend in the Y-axis direction.

[0034] The connecting chamber 21b has a wall M21 and a bottom M22. The wall M21 is a wall that opens toward the color separation prism 10. The bottom M22 is a bottom surface that connects to the wall M21 and the wall M11 of each storage chamber 21a. This bottom M22 is a surface that includes all of the upper surfaces of each wall portion 21c. In the example of FIG. 5, the wall M21 of the connecting chamber 21b is formed in a U-shape in plan view, similar to each storage chamber 21a.

[0035] Each storage chamber 21a and connecting chamber 21b is filled with adhesive, which is then cured to form first adhesive members 31. Specifically, when color separation prism 10 is placed on holding member 20, adhesive is supplied to each storage chamber 21a and fills each storage chamber 21a while adhering to the side surfaces of color separation prism 10. As the filling progresses, the adhesive overflows from each storage chamber 21a and fills connecting chamber 21b. As a result, the adhesive in each storage chamber 21a is connected by the adhesive in connecting chamber 21b. The adhesive filled in each storage chamber 21a and connecting chamber 21b is then cured to form first adhesive members 31.

[0036] (Functions of the Multiple Storage Chambers) Fig. 7 is a diagram for explaining the functions of the multiple storage chambers 21a according to this embodiment. In the example of Fig. 7, a storage section 21A according to a comparative example and the first storage section 21 according to this embodiment are shown.

[0037] As shown in FIG. 7 , the storage section 21A according to the comparative example differs from the first storage section 21 according to the present embodiment in that it has only one storage chamber 21a. The length L1 of the storage chamber 21a in the comparative example in the longitudinal direction (Y-axis direction) is much longer than the length L2 of each storage chamber 21a in the first storage section 21 according to the present embodiment. Therefore, the storage section 21A according to the comparative example experiences a very large difference in linear expansion in the longitudinal direction under a temperature environment. Therefore, the stress F1 due to tension, compression, etc., generated at the adhesive interfaces on the wall surfaces at both ends is large.

[0038] On the other hand, the longitudinal length L2 of each of the storage chambers 21a of the first storage unit 21 according to the present embodiment is much shorter than the longitudinal length L1 of the storage chambers 21a of the storage unit 21A according to the comparative example. This allows the first storage unit 21 according to the present embodiment to alleviate tensile and compressive stress F1, thereby suppressing the progression of adhesive interface peeling due to temperature changes. Furthermore, since the number of storage chambers 21a is increased, the overall wall area is also increased compared to the comparative example, which simply increases the adhesive strength in the Z-axis direction (e.g., the optical axis direction) and in directions perpendicular to the Z-axis direction (e.g., the X-axis direction and the Y-axis direction). Furthermore, each storage chamber 21a exerts an anchoring effect against external forces in the longitudinal direction. For these reasons, configuring the first storage unit 21 with multiple storage chambers 21a can improve adhesive strength. Furthermore, adhesive peeling due to temperature changes can also be prevented.

[0039] (Function of the connecting chamber) Fig. 8 is a diagram for explaining the function of the connecting chamber 21b according to this embodiment. In the example of Fig. 8, the storage section 21B according to the comparative example and the first storage section 21 according to this embodiment are shown.

[0040] 8, unlike the first storage unit 21 according to the present embodiment, the storage unit 21B according to the comparative example does not have the connecting chamber 21b but has a plurality of independent storage chambers 21a. On the other hand, the first storage unit 21 according to the present embodiment has the connecting chamber 21b.

[0041] The storage unit 21B according to the comparative example does not have the connecting chamber 21b, so the total floor area (bottom area) in contact with the adhesive is reduced compared to the storage unit 21A according to the comparative example (see FIG. 7), resulting in a decrease in adhesive strength. On the other hand, the first storage unit 21 according to the present embodiment has the connecting chamber 21b, so the adhesive in the connecting chamber 21b forms an overflow layer that adheres to the bottom surface M22 (the upper surface of each wall portion 21c) of the connecting chamber 21b. As a result, the total floor area (bottom area) in contact with the adhesive is not reduced compared to the storage unit 21A according to the comparative example, so a decrease in adhesive strength can be suppressed.

[0042] Furthermore, if the connecting chamber 21b is not present, the adhesive shrinks due to differences in linear expansion at low temperatures, which can cause peel stress at the adhesive interface at each corner of each wall portion 21c (see ellipse D11 in Figure 8). On the other hand, if the connecting chamber 21b is present, the adhesive in each adjacent storage chamber 21a is connected by an overflow layer of adhesive. This can mitigate the peel stress at the adhesive interface (see ellipse D12 in Figure 8). Furthermore, if the connecting chamber 21b is not present, compressive stress would occur at the adhesive interface at high temperatures. On the other hand, if the connecting chamber 21b is present, the overflow layer of adhesive can mitigate the compressive stress at the adhesive interface (see ellipse D12 in Figure 8). Providing the connecting chamber 21b in this way can improve adhesive strength and also prevent adhesive peeling due to temperature changes.

[0043] (Function of the Sloped Surface of the Storage Chamber) Fig. 9 is a perspective view showing a configuration example of the second storage section 22 according to this embodiment. Fig. 10 is a diagram for explaining the function of the slope M31 of the storage chamber 22a according to this embodiment. The example of Fig. 10 shows a storage section 22C according to a comparative example and the second storage section 22 according to this embodiment.

[0044] As shown in Fig. 9, the second storage section 22 has the same configuration as the first storage section 21. That is, the second storage section 22 has a plurality of storage chambers 22a and a connecting chamber 22b. In the example of Fig. 9, the number of storage chambers 22a is four. Each storage chamber 22a is separated by a plurality of wall portions 22c. Like the storage chamber 21a, each storage chamber 22a has a wall surface M11 and a bottom surface M12. Like the connecting chamber 21b, the connecting chamber 22b has a wall surface M21 and a bottom surface M22.

[0045] Each storage chamber 22a has a slope M31. The slope M31 is a slope that connects the wall surface M11 and the bottom surface M12 of the storage chamber 22a. This slope M31 gradually slopes downward from the wall surface M11 toward the bottom surface M12. Note that all of the storage chambers 22a have the slope M31, but this is not limited thereto. For example, only a portion of each storage chamber 22a may have the slope M31.

[0046] 10 , the storage chamber 22a of the storage unit 22C according to the comparative example has a corner 31a, unlike the storage chamber 22a of the second storage unit 22 according to the present embodiment. On the other hand, the storage chamber 22a of the second storage unit 22 according to the present embodiment has a slope M31 instead of the corner 31a.

[0047] In the storage unit 22C according to the comparative example, when the adhesive N2 is filled into the storage chamber 22a by the application needle N1, the filled adhesive N2 comes into contact with the side surface of the color separation prism 10. At this time, the adhesive does not reach the corners 31a of the storage chamber 22a, and sealed air bubbles may occur.

[0048] For example, if the shape into which the viscous adhesive is poured becomes fine and complex, it becomes difficult to ensure that the adhesive reaches every corner, resulting in a reduction in the adhesive area and a decrease in adhesive strength. If the adhesive does not reach the corners 31a of the storage chamber 22a and sealed air bubbles form, the adhesive will be deformed by the air thermally expanding in a high-temperature environment, resulting in a decrease in the retention accuracy of the optical component. Furthermore, if air is present in the corners 31a of the storage chamber 22a, the adhesive will not reach the corners 31a, causing a decrease in adhesive strength.

[0049] Therefore, by providing a slope M31 at the corner 31a of the storage chamber 21a, air is eliminated and the slope M31 and gravity can be used to guide the adhesive toward the side of the color separation prism 10. This improves the adhesive strength and reduces individual variations in adhesive strength. Furthermore, it also reduces deformation of the adhesive due to temperature changes.

[0050] (Function of the Sloped Surface of the Wall) Fig. 11 is a perspective view showing a configuration example of the second storage section 22 according to this embodiment. Fig. 12 is a diagram for explaining the function of the slope M41 of the wall 22c according to this embodiment. The example of Fig. 12 shows the wall 22c according to this embodiment.

[0051] As shown in FIG. 11 , the second housing section 22 has a plurality of wall sections 22c. Each wall section 22c has a slope M41. The slope M41 is a slope connecting an upper surface M42 and a front surface M43 of the wall section 22c. The slope M41 gradually slopes downward from the upper surface M42 toward the front surface M43. The upper surface M42 is the upper surface of the wall section 22c, and the front surface M43 is the surface facing the color separation prism 10. The upper surface M42 is part of the bottom surface M22 of the connecting chamber 22b.

[0052] 12, adhesive N2 is present in the gap between wall portion 22c and the side surface of color separation prism 10. The adhesive layer formed by adhesive N2 in this gap is an adhesive layer that depends on the film thickness, but it contributes greatly to improving the adhesive strength even if the gap is narrow. The gap between wall portion 22c and the side surface of color separation prism 10 is secured to be several millimeters, for example, to provide a margin.

[0053] The corners of the wall portion 22c are provided with slopes M41, which make it possible to guide the viscous adhesive N2 into the gap between the wall portion 22c and the side surface of the color separation prism 10 so that the adhesive N2 can be reliably introduced into the gap. This makes it possible to improve the adhesive strength and also to reduce individual variations in adhesive strength.

[0054] (Various Effects) As described above, according to this embodiment, by providing the first storage section 21 and the second storage section 22, configuring the first storage section 21 with a plurality of storage chambers 21a, and configuring the second storage section 22 with a plurality of storage chambers 22a, it is possible to improve and increase the balance between the area of ​​the peel surface and the shear surface at the adhesive interface, and also to create an anchor effect, thereby improving the adhesive strength against impacts from all directions.

[0055] Furthermore, by providing a connecting chamber 21b in the first storage section 21 and a connecting chamber 21b in the second storage section 22, the peeling stress that occurs inside each storage chamber 21a or each storage chamber 22a due to temperature changes and differences in linear expansion coefficient can be suppressed by the adhesive in the connecting portion (overflow layer) with the adjacent chamber, thereby preventing a decrease in adhesive strength due to temperature changes.

[0056] Furthermore, by providing each of the storage chambers 21a and 22a with the slope M31, it is possible to guide the adhesive toward the color separation prism 10 when applying the adhesive, thereby improving the adhesive strength. Furthermore, it is possible to make it difficult for air bubbles to form in the corners 31a of each of the storage chambers 21a and 22a, thereby suppressing a decrease in adhesive strength after exposure to a high-temperature environment.

[0057] Furthermore, by providing an inclined surface M41 on each wall portion 21c and each wall portion 22c, it becomes possible to guide adhesive into the gap between each wall portion 21c and the color separation prism 10 and the gap between wall portion 22c and the color separation prism 10 and fill it thoroughly, thereby improving the adhesive strength.

[0058] For example, medical observation devices, such as medical equipment and medical research equipment, often use vapor deposition films tuned to transmit or block specific wavelengths, such as laser excitation light used to analyze specimen cells and fluorescence emitted from specimen cells. Therefore, many optical components have UV-blocking vapor deposition films. Furthermore, to improve heat dissipation within the device, other components to which optical components are bonded are often made of metals such as aluminum or brass, which necessitates reducing stress due to differences in linear expansion between the optical components and the glass components. Furthermore, each device may undergo high-temperature sterilization, which can require extremely strict conditions for withstanding sudden temperature changes. Furthermore, when bonding optical components such as the color separation prism 10 or other prisms, optical lenses, and filters to a metal or resin holding member 20, the bonding occurs in an area outside the optical path.

[0059] For these reasons, it is preferable to use edge bonding and UV-curing adhesives, but the adhesive strength of conventional edge bonding is relatively weak. With conventional edge bonding, the adhesive is applied so as to bridge the optical component and other components. However, it is somewhat difficult to ensure that the adhesive bridges both components, the application area is unclear, and the adhesive may wet and spread over the time elapsed before UV irradiation begins. These factors lead to variations in adhesive strength between individual components. Furthermore, it is difficult to ensure sufficient adhesive strength when the optical component is heavy, such as a bonded prism, or when it is subjected to external forces due to electrical wiring, such as in an image sensor.

[0060] Therefore, by providing the first storage section 21 and the second storage section 22, it is possible to fill the first storage section 21 and the second storage section 22 with adhesive so as to prevent the adhesive from spreading while clarifying the adhesive application area, thereby reducing variation in adhesive strength between individual units. Furthermore, by configuring the first storage section 21 with multiple storage chambers 21a and connecting chambers 21b, it is possible to improve adhesive strength. Similarly, by configuring the second storage section 22 with multiple storage chambers 22a and connecting chambers 22b, it is possible to improve adhesive strength.

[0061] <2. Second Embodiment> <2-1. Configuration Example of Optical Device> A configuration example of an optical device 1B according to this embodiment will be described with reference to Fig. 13. Fig. 13 is a perspective view showing the configuration example of the optical device 1B according to this embodiment. This embodiment is basically the same as the first embodiment, but differences therebetween will be described.

[0062] As shown in Fig. 13, an optical device 1B according to this embodiment includes an imaging unit 50 instead of the color separation prism 10. In the example of Fig. 13, the number of the storage chambers 21a is six.

[0063] The imaging unit 50 has an imaging element substrate 51, a connector substrate 52, and a flexible substrate 53. The imaging element substrate 51 has an imaging element 51a. The imaging element 51a is an example of an optical component. The imaging element substrate 51 is held by the holding member 20 and connected to the connector substrate 52 via the flexible substrate 53. The connector substrate 52 has a connector 52a. The flexible substrate 53 has multiple wires (not shown) that connect the imaging element 51a and the connector 52a.

[0064] According to the optical device 1B, the same effects as those of the first embodiment can be obtained, for example, the adhesive strength can be improved.

[0065] It is possible to apply the optical device 1B to the optical device 1A according to the first embodiment. In this case, the image sensor 51a corresponds to the first image sensor 41 or the second image sensor 42 according to the first embodiment. For example, one or both of the optical device 1B having the first image sensor 41 as the image sensor 51a and the optical device 1B having the second image sensor 42 as the image sensor 51a may be installed relative to the color separation prism 10.

[0066] 3. Examples Examples 1 and 2 according to any of the above-described embodiments will be described with reference to Figs. 14 to 17. Figs. 14 to 16 are diagrams showing the first housing section 21 (dimensions, angles) of the optical device 1A or optical device 1B according to any of the above-described embodiments. Fig. 17 is a diagram showing design values ​​of the first housing section 21 of the optical device 1A or optical device 1B according to any of the above-described embodiments.

[0067] As shown in Figure 14, the height (length in the Z-axis direction) of the connecting chamber 21b is indicated by the symbol A, the total height (length in the Z-axis direction) of the connecting chamber 21b and the storage chamber 21a is indicated by the symbol B (total height B = height of the connecting chamber 21b + height of the storage chamber 21a), and the length (length in the Y-axis direction) of the storage chamber 21a is indicated by the symbol C.

[0068] As shown in Fig. 15, the angle of the inclined surface M31 of the storage chamber 21a is indicated by the symbol D. Also, as shown in Fig. 16, the angle of the inclined surface M41 of the wall portion 21c is indicated by the symbol E. In the examples of Figs. 15 and 16, the angles are angles relative to the XY plane.

[0069] 17, in Example 1, the height A of connecting chamber 21b is 0.3 mm, the total height B of connecting chamber 21b and storage chamber 21a is 1.1 mm, the ratio of height A to height B is 27%, the length C of storage chamber 21a is 1.4 mm, the angle D of inclined surface M31 of storage chamber 21a is 45 degrees, and the angle E of inclined surface M41 of wall portion 21c is 45 degrees. It was confirmed that Example 1 can achieve improved adhesive strength.

[0070] In Example 2, the height A of connecting chamber 21b is 0.32 mm, the total height B of connecting chamber 21b and storage chamber 21a is 1.1 mm, the ratio of height A to height B is 24%, the length C of storage chamber 21a is 1.4 mm, the angle D of inclined surface M31 of storage chamber 21a is 45 degrees, and the angle E of inclined surface M41 of wall portion 21c is 45 degrees. It was confirmed that Example 2 could achieve improved adhesive strength.

[0071] Note that the design values ​​in Figure 17 are merely examples, and other design values ​​may be used. The ratio of height A to height B is 27% in Example 1 and 24% in Example 2, but improvements in adhesive strength were also confirmed for other ratios. It was confirmed that adhesive strength may be insufficient when the ratio of height A to height B is less than 20% or more than 30%. Therefore, it is preferable that the ratio of height A to height B is within the range of 20% to 30%.

[0072] Furthermore, the length C of the storage chamber 21a is preferably in the range of 0.4 mm to 8.0 mm. Furthermore, the length C of the storage chamber 21a is more preferably in the range of 0.4 mm to 1.4 mm. The storage chamber 21a is filled with adhesive using, for example, a needle (application needle N1). The length C of the storage chamber 21a may be set depending on the viscosity of the adhesive and the diameter of the needle, as well as the desired adhesive strength. If the length C of the storage chamber 21a is shorter than 0.4 mm, the storage chamber 21a may not be properly filled with adhesive having a certain degree of viscosity. If the length C of the storage chamber 21a is longer than 8.4 mm, the longitudinal length of the storage chamber 21a becomes too long, making it difficult to properly relieve stress. For this reason, the length C of the storage chamber 21a is preferably 8.0 mm or less, and more preferably 1.4 mm or less.

[0073] Furthermore, the angle D of the slope M31 of the storage chamber 21a and the angle E of the slope M41 of the wall portion 21c are preferably greater than 0 degrees and less than 90 degrees, and more preferably 45 degrees. If the angle D of the slope M31 and the angle E of the slope M41 are 0 degrees and 180 degrees, respectively, the slope shape is not valid. Furthermore, if the angle D of the slope M31 and the angle E of the slope M41 are within the range of 90 degrees or greater and 180 degrees or less, it is not possible to form a slope that gradually decreases toward the side surface of the color separation prism 10 or the image sensor 51a, and it is not possible to guide the viscous adhesive to the side surface of the color separation prism 10 or the image sensor 51a.

[0074] 4. Functions and Effects of Each Embodiment As described above, according to each of the above-described embodiments, the optical device 1A or 1B includes an optical component (e.g., a color separation prism 10 or an image sensor 51a), a holding member 20 that holds the optical component, and a first adhesive member 31 that adheres the optical component to the holding member 20. The holding member 20 has a first housing portion 21 that houses the first adhesive member 31, and the first housing portion 21 includes a plurality of housing chambers 21a that respectively house the first adhesive member 31 in contact with the optical component (see, for example, FIGS. 1 , 2 , 5 , 6 , 13 , etc.). As a result, since the first housing portion 21 is composed of a plurality of housing chambers 21a, it is possible to alleviate stress due to tension or compression compared to when the first housing portion 21 is composed of a single housing chamber 21a. Furthermore, it is possible to increase the bonding area between the first housing portion 21 and the first adhesive member 31, thereby improving the bonding strength.

[0075] The first housing section 21 may also have a connecting chamber 21b that connects the multiple housing chambers 21a and accommodates the first adhesive member 31 in contact with the optical component (see Figures 5 and 6, etc.). As a result, the housing chambers 21a are connected by the connecting chambers 21b, and adjacent housing chambers 21a are connected by an overflow layer of adhesive. Therefore, compared to when the connecting chambers 21b are not present, it is possible to alleviate peel stress and compressive stress that occur at the adhesive interface, thereby improving adhesive strength.

[0076] The connecting chamber 21b may be located above the first housing portion 21 (see FIGS. 5 and 6). This ensures improved adhesive strength. Furthermore, since the adhesive can be easily filled into the first housing portion 21, the adhesive process for adhering the optical component to the holding member 20 can be simplified.

[0077] The connecting chamber 21b may have a wall M21 that opens to the optical component side and a bottom M22 that connects to the wall M21 and the plurality of storage chambers 21a (see FIGS. 5 and 6, etc.). This can reliably improve the adhesive strength.

[0078] Furthermore, the wall surface M21 of the connecting chamber 21b may be formed in a U-shape in plan view (see FIG. 5, etc.), which can reliably improve the adhesive strength.

[0079] Furthermore, the height A of the connecting chamber 21b may be within a range of 20% to 30% of the total height B of the storage chamber 21a and the connecting chamber 21b (see, for example, Figures 14 and 17), thereby ensuring improved adhesive strength.

[0080] Each of the plurality of storage chambers 21a may have a wall surface M11 that opens to the optical component side and a bottom surface M12 that is connected to the wall surface M11 (see FIGS. 5 and 6, etc.). This can reliably improve the adhesive strength.

[0081] Furthermore, the wall surface M11 of each of the plurality of storage chambers 21a may be formed in a U-shape in plan view (see, for example, FIG. 5 ). This makes it possible to prevent air from remaining in the corners of the wall surface M11 and the bottom surface M12, compared to when a portion of the wall surface M11 has a corner that is L-shaped in plan view, and therefore it is possible to reliably achieve an improvement in adhesive strength.

[0082] At least one of the plurality of storage chambers 21a may have a slope M31 connecting the wall surface M11 and the bottom surface M12, and the slope M31 may be inclined so as to gradually decrease in size from the wall surface M11 toward the bottom surface M12 (see, for example, Figures 9 and 10). This makes it possible to prevent air from remaining in the corners of the wall surface M11 and the bottom surface M12, compared to when the slope M31 connecting the wall surface M11 and the bottom surface M12 does not exist, thereby reliably achieving improved adhesive strength.

[0083] Furthermore, all of the plurality of storage chambers 21a may have the inclined surfaces M31 (see, for example, FIGS. 9 and 10 ). This can reliably achieve improved adhesive strength compared to when only a portion of each storage chamber 21a has the inclined surfaces M31.

[0084] Furthermore, the plurality of storage chambers 21a may be arranged in a line (see FIG. 9, etc.), which allows the first adhesive member 31 to be reliably brought into contact with the linear portions of the optical component, thereby more reliably improving the adhesive strength.

[0085] The first storage section 21 may have walls 21c separating the plurality of storage chambers 21a (see, for example, Figures 11 and 12), which allows the first storage section 21 to be reliably divided into the plurality of storage chambers 21a, thereby reliably improving the adhesive strength.

[0086] Furthermore, the wall 21c has an inclined surface M41 connecting the upper surface M42 and the front surface M43 of the wall 21c, and the inclined surface M41 may be inclined so as to gradually decrease in size from the upper surface M42 to the front surface M43 (see, for example, FIGS. 11 and 12). This allows the viscous adhesive to easily flow from the upper surface M42 of the wall 21c to the front surface M43, ensuring that the adhesive fills the gap between the wall 21c and the optical component, thereby reliably improving the adhesive strength.

[0087] The second adhesive member 32 may be provided in addition to the first adhesive member 31, and the second storage section 22 may be provided in addition to the first storage section 21 (see, for example, FIGS. 1 and 13). That is, a plurality of adhesive members may be provided, and a plurality of storage sections may be provided in accordance with the number of adhesive members. This can reliably achieve an improvement in adhesive strength.

[0088] The first adhesive member 31 and the second adhesive member 32 may be provided so as to face each other with the optical component therebetween, and the first housing portion 21 and the second housing portion 22 may also be provided so as to face each other with the optical component therebetween (see FIGS. 1 and 13, etc.). This can reliably achieve an improvement in adhesive strength.

[0089] Furthermore, the holding member 20 may be formed in a frame shape having an opening 20a, and the optical component may be provided so as to cover the opening 20a (see, for example, FIGS. 1 and 13). Even with this configuration, it is possible to achieve improved adhesive strength.

[0090] The optical component may also include a color separation prism 10, which is an example of a prism having a reflecting surface M1, and the first adhesive member 31 may be provided so as to contact the color separation prism 10 while avoiding the reflecting surface M1 (see FIGS. 3 and 4). Even with this configuration, the adhesive strength can be improved. Furthermore, the first adhesive member 31 can be prevented from affecting the light reflection of the color separation prism 10.

[0091] The optical component may include an imaging element 51 a, and the first adhesive member 31 may be provided so as to be in contact with the imaging element 51 a (see FIG. 13 , etc.). Even with this configuration, it is possible to achieve an improvement in adhesive strength.

[0092] 5. Other Embodiments The configurations and processes according to the above-described embodiments (including examples and modified examples) may be implemented in various different forms other than the above-described embodiments. For example, the configurations and processes are not limited to the above-described examples and may be implemented in various forms. Furthermore, for example, the configurations, processing procedures, specific names, or information including various data and parameters shown in the above documents and drawings may be changed arbitrarily unless otherwise specified.

[0093] Furthermore, the components and processes according to the above-described embodiments (including examples and modifications) do not necessarily have to be physically configured as shown in the drawings. In other words, the specific forms of distribution and integration of the components and processes are not limited to those shown in the drawings, and all or part of them may be functionally or physically distributed or integrated in any unit depending on various loads, usage conditions, etc.

[0094] Furthermore, the configurations and processes of the above-described embodiments (including examples and modified examples) may be combined as appropriate. For example, at least a part of an embodiment may be combined as appropriate with at least a part of another embodiment. Furthermore, the effects of the embodiments are merely examples and are not intended to be limiting, and other effects may also be obtained.

[0095] 6. Application Examples A medical observation device 100 to which the optical device 1A described above is applied will be described with reference to Fig. 18. Fig. 18 is a diagram showing an example of the schematic configuration of the medical observation device 100. The medical observation device 100 is, for example, an endoscope. The endoscope may be either a flexible endoscope or a rigid endoscope.

[0096] As shown in FIG. 18, the medical observation device 100 includes a camera head 110 and an optical system 120 .

[0097] The camera head 110 incorporates the optical device 1A described above. This camera head 110 generates an image signal from the light image generated by the optical system 120. The generated image signal is converted into an image by a device external to the medical observation device 100 and used for screen display or the like.

[0098] The optical system 120 generates a visible light image and an infrared light image of the subject. The infrared light image is, for example, a near-infrared fluorescent image. The optical system 120 guides light from a light source to the subject and also guides light reflected from the subject to the camera head 110. For example, an LED (light-emitting diode) or a laser light source can be used as the light source.

[0099] For example, the optical system 120 has a light source optical system and an imaging optical system (neither of which are shown), and guides light from a light source to a subject via the light source optical system, and further guides light reflected by the subject to the camera head 110 via the imaging optical system. The optical system 120 is configured by combining a plurality of lenses including, for example, a zoom lens and a focus lens. The zoom lens and the focus lens may be configured so that their positions on the optical axis can be moved to adjust the magnification and focus of the captured image, etc.

[0100] Such a medical observation device 100 can capture images of various subjects (for example, the intraperitoneal environment). The medical observation device 100 can also capture images of the surgical field, including various surgical tools and organs inside the patient's abdominal cavity. The medical observation device 100 functions as an imaging device that can capture images of the subject in the form of video or still images.

[0101] In addition to the optical device 1A described above, the optical device 1B described above may also be applied to the medical observation device 100. For example, one or both of the optical device 1B having the first image pickup element 41 as the image pickup element 51a and the optical device 1B having the second image pickup element 42 as the image pickup element 51a may be installed relative to the color separation prism 10. In this case, each optical device 1B is built into the camera head 110, for example.

[0102] Alternatively, instead of the color separation prism 10, a beam splitter functioning as a half mirror may be provided, a color sensor (e.g., an RGB sensor) may be provided as the first image sensor 41, and an event-based vision sensor (EVS) may be provided as the second image sensor 42. The beam splitter is a component that splits light reflected by the subject and directs it to both the first image sensor 41 and the second image sensor 42. The EVS is a sensor that detects an event when a change in the luminance of incident light for each pixel exceeds a predetermined threshold, and outputs sensing information (e.g., coordinates, time, polarity, etc.) of the pixel where the event occurred.

[0103] Furthermore, the medical observation device 100 may be, for example, an oblique endoscope, a forward-viewing endoscope with a wide-angle / cutting function, an endoscope with a tip bending function, an endoscope with a multi-directional simultaneous imaging function, or an exoscope or microscope, and is not particularly limited. The medical observation device 100 may also be a stereo endoscope capable of distance measurement. Alternatively, a distance measurement device such as a depth sensor may be provided within the camera head 110 or separately from the camera head 110. The depth sensor may be, for example, a sensor that measures distance using a time-of-flight (ToF) method that measures distance using the return time of pulsed light reflected from a subject, or a structured light method that measures distance using a grid-like pattern of light and measures distance based on the distortion of the pattern.

[0104] The camera head 110, the optical system 120, and the like may have a sealed structure that is highly airtight and waterproof. This allows the camera head 110 and the optical system 120 to be resistant to autoclave sterilization. The camera head 110 and the optical system 120 may be provided, for example, at the tip of a robot arm. The robot arm supports the camera head 110 and the optical system 120. The optical device 1A may also be provided in the tip of a flexible or rigid endoscope that is inserted into the abdominal cavity.

[0105] 7. Application Examples The technology according to the present disclosure can be applied to a medical observation system, i.e., a medical imaging system. A medical imaging system is a medical system that uses imaging technology, such as an endoscope system or a microscope system. In a medical imaging system according to the present disclosure, for example, either or both of the optical device 1A or 1B described above can be applied to an endoscope 5001, a microscope device 5301, or the like.

[0106] (Endoscopic System) An example of an endoscope system will be described with reference to FIGS. 19 and 20 . FIG. 19 is a diagram illustrating an example of the schematic configuration of an endoscope system 5000 to which the technology according to the present disclosure can be applied. FIG. 20 is a diagram illustrating an example of the configuration of an endoscope 5001 and a CCU (Camera Control Unit) 5039. FIG. 19 illustrates a state in which an operator (e.g., a doctor) 5067, who is a surgical participant, is performing surgery on a patient 5071 on a patient bed 5069 using the endoscope system 5000. As shown in FIG. 19 , the endoscope system 5000 includes an endoscope 5001, which is a medical imaging device, a CCU 5039, a light source device 5043, a recording device 5053, an output device 5055, and a support device 5027 that supports the endoscope 5001.

[0107] In endoscopic surgery, an insertion aid called a trocar 5025 is inserted into a patient 5071. Then, a scope 5003 and surgical tools 5021 connected to an endoscope 5001 are inserted into the body of the patient 5071 via the trocar 5025. The surgical tools 5021 are, for example, energy devices such as an electric scalpel, forceps, etc.

[0108] A surgical image, which is a medical image showing the inside of the body of a patient 5071 photographed by an endoscope 5001, is displayed on a display device 5041. An operator 5067 performs a procedure on the surgical target using a surgical tool 5021 while viewing the surgical image displayed on the display device 5041. Note that the medical image is not limited to a surgical image, and may be a diagnostic image photographed during a diagnosis.

[0109] (Endoscope) The endoscope 5001 is an imaging unit that captures images of the inside of the patient's 5071. For example, as shown in FIG. 20 , the endoscope 5001 is a camera 5005 that includes a focusing optical system 50051 that focuses incident light, a zoom optical system 50052 that changes the focal length of the imaging unit to enable optical zoom, a focus optical system 50053 that changes the focal length of the imaging unit to enable focus adjustment, and a light-receiving element 50054. The endoscope 5001 generates pixel signals by focusing light onto the light-receiving element 50054 via a connected scope 5003, and outputs the pixel signals to the CCU 5039 via a transmission system. The scope 5003 has an objective lens at its tip and is an insertion section that guides light from a connected light source device 5043 into the inside of the patient's 5071. The scope 5003 is, for example, a rigid scope if it is a rigid endoscope or a flexible scope if it is a flexible endoscope. The scope 5003 may be a direct-view endoscope or an oblique-view endoscope. Furthermore, the pixel signal may be a signal based on a signal output from a pixel, such as a RAW signal or an image signal. Furthermore, a configuration may be adopted in which a memory is installed in the transmission system connecting the endoscope 5001 and the CCU 5039, and parameters related to the endoscope 5001 and the CCU 5039 are stored in the memory. The memory may be located, for example, in a connection portion of the transmission system or on a cable. For example, parameters at the time of shipment of the endoscope 5001 and parameters that change when power is applied may be stored in the memory of the transmission system, and the operation of the endoscope may be changed based on parameters read from the memory. Furthermore, the endoscope and the transmission system may be collectively referred to as an endoscope. The light-receiving element 50054 is a sensor that converts received light into a pixel signal, and is, for example, a CMOS (Complementary Metal Oxide Semiconductor) type image sensor. It is preferable that the light-receiving element 50054 be an image sensor capable of color imaging with a Bayer array. Furthermore, the light receiving element 50054 is preferably an imaging element having a number of pixels corresponding to a resolution of, for example, 4K (3840 horizontal pixels × 2160 vertical pixels), 8K (7680 horizontal pixels × 4320 vertical pixels), or square 4K (3840 or more horizontal pixels × 3840 or more vertical pixels). The light receiving element 50054 may be a single sensor chip or multiple sensor chips.For example, a prism may be provided to separate incident light into predetermined wavelength bands, and each wavelength band may be imaged by a different light-receiving element. Alternatively, multiple light-receiving elements may be provided for stereoscopic vision. The light-receiving element 50054 may be a sensor including an image processing circuit within its chip structure, or a Time of Flight (ToF) sensor. The transmission system may be, for example, an optical fiber cable or wireless transmission. Wireless transmission may be performed via any means capable of transmitting pixel signals generated by the endoscope 5001. For example, the endoscope 5001 and the CCU 5039 may be connected wirelessly, or the endoscope 5001 and the CCU 5039 may be connected via a base station in the operating room. In this case, the endoscope 5001 may simultaneously transmit not only pixel signals but also information related to the pixel signals (e.g., pixel signal processing priority, synchronization signal, etc.). The endoscope may be configured such that the scope and camera are integrated, or a light-receiving element is provided at the tip of the scope.

[0110] (CCU (Camera Control Unit)) The CCU 5039 is a control device that comprehensively controls the connected endoscope 5001 and light source device 5043, and is, for example, an information processing device having an FPGA 50391, a CPU 50392, a RAM 50393, a ROM 50394, a GPU 50395, and an I / F 50396, as shown in FIG. 20 . The CCU 5039 may also comprehensively control the connected display device 5041, recording device 5053, and output device 5055. For example, the CCU 5039 controls the irradiation timing and irradiation intensity of the light source device 5043, and the type of irradiation light source. The CCU 5039 also performs image processing such as development processing (e.g., demosaic processing) and correction processing on pixel signals output from the endoscope 5001, and outputs the processed pixel signals (e.g., an image) to an external device such as the display device 5041. Furthermore, the CCU 5039 transmits a control signal to the endoscope 5001 to control the driving of the endoscope 5001. The control signal is, for example, information regarding imaging conditions such as the magnification and focal length of the imaging unit. The CCU 5039 may have an image down-conversion function and be configured to be able to simultaneously output a high-resolution (e.g., 4K) image to the display device 5041 and a low-resolution (e.g., HD) image to the recording device 5053.

[0111] The CCU 5039 may also be connected to external devices (e.g., recording devices, display devices, output devices, and support devices) via an IP converter that converts signals into a predetermined communication protocol (e.g., IP (Internet Protocol)). The connection between the IP converter and the external devices may be configured as a wired network, or a partial or entire network may be configured as a wireless network. For example, the IP converter on the CCU 5039 side may have a wireless communication function and transmit the received video to an IP switcher or an output-side IP converter via a wireless communication network such as a fifth-generation mobile communication system (5G) or a sixth-generation mobile communication system (6G).

[0112] (Light Source Device) The light source device 5043 is a device capable of emitting light in a predetermined wavelength band, and includes, for example, multiple light sources and a light source optical system that guides the light from the multiple light sources. The light sources are, for example, a xenon lamp, an LED light source, or an LD light source. The light source device 5043 has, for example, LED light sources corresponding to the three primary colors R, G, and B, and emits white light by controlling the output intensity and output timing of each light source. Furthermore, the light source device 5043 may include a light source that can emit special light used for special light observation, in addition to a light source that emits normal light used for normal light observation. The special light is light in a predetermined wavelength band different from the normal light used for normal light observation, such as near-infrared light (light with a wavelength of 760 nm or more), infrared light, blue light, or ultraviolet light. The normal light is, for example, white light or green light. In narrowband light observation, which is a type of special light observation, blue light and green light are alternately emitted to utilize the wavelength dependence of light absorption in body tissue, thereby enabling high-contrast imaging of specific tissue, such as blood vessels on the surface of the mucous membrane. Furthermore, in fluorescence observation, a type of special light observation, excitation light is applied to excite a drug injected into the body tissue, and fluorescence emitted by the drug as a marker is received to obtain a fluorescence image, thereby making it easier for the surgeon to visualize body tissues that are difficult for the surgeon to see under normal light. For example, in fluorescence observation using infrared light, infrared light having an excitation wavelength band is applied to a drug such as indocyanine green (ICG) injected into the body tissue, and the fluorescence of the drug is received, making it easier to visualize the structure of the body tissue and affected areas. Furthermore, in fluorescence observation, a drug (e.g., 5-ALA) that is excited by special light in the blue wavelength band and emits fluorescence in the red wavelength band may be used. The type of light irradiated by the light source device 5043 is set under the control of the CCU 5039. The CCU 5039 may have a mode in which normal light observation and special light observation are alternately performed by controlling the light source device 5043 and the endoscope 5001. In this case, it is preferable to superimpose information based on pixel signals obtained by special light observation on pixel signals obtained by normal light observation. The special light observation may be infrared light observation, which irradiates infrared light to view areas deeper than the surface of an organ, or multispectral observation using hyperspectral spectroscopy. Furthermore, photodynamic therapy may be combined.

[0113] (Recording Device) The recording device 5053 is a device, such as a recorder, that records pixel signals (e.g., images) acquired from the CCU 5039. The recording device 5053 records images acquired from the CCU 5039 on an HDD, SSD, or optical disk. The recording device 5053 may be connected to an intra-hospital network and may be accessible from devices outside the operating room. The recording device 5053 may also have an image down-conversion or up-conversion function.

[0114] (Display Device) The display device 5041 is a device capable of displaying an image, such as a display monitor. The display device 5041 displays an image based on pixel signals acquired from the CCU 5039. The display device 5041 may also function as an input device that enables gaze recognition, voice recognition, and instruction input using gestures by including a camera and a microphone.

[0115] (Output Device) The output device 5055 is a device, such as a printer, that outputs information acquired from the CCU 5039. The output device 5055 prints, for example, a print image based on pixel signals acquired from the CCU 5039 onto paper.

[0116] (Support Device) The support device 5027 is an articulated arm including a base 5029 having an arm control device 5045, an arm 5031 extending from the base 5029, and a holder 5032 attached to the tip of the arm 5031. The arm control device 5045 is configured with a processor such as a CPU and controls the drive of the arm 5031 by operating according to a predetermined program. The support device 5027 controls the position and posture of the endoscope 5001 held by the holder 5032, for example, by controlling parameters such as the length of each link 5035 constituting the arm 5031 and the rotation angle and torque of each joint 5033 using the arm control device 5045. This allows the endoscope 5001 to be changed to a desired position or posture, allowing the scope 5003 to be inserted into the patient 5071 and the observation area within the body to be changed. The support device 5027 functions as an endoscope support arm that supports the endoscope 5001 during surgery. This allows the support device 5027 to take the place of an assistant scopist who holds the endoscope 5001. The support device 5027 may also be a device that supports a microscope device 5301 (described later) and may also be called a medical support arm. The support device 5027 may be controlled autonomously by the arm control device 5045, or may be controlled by the arm control device 5045 based on user input. For example, the control method may be a master-slave method in which the support device 5027, which serves as a slave device (replica device) serving as a patient cart, is controlled based on the movement of a master device (primary device) that serves as an operator console near the user. The support device 5027 may also be remotely controlled from outside the operating room.

[0117] The above describes an example of an endoscope system 5000 to which the technology according to the present disclosure can be applied. For example, the technology according to the present disclosure may be applied to a microscope system.

[0118] 21 is a diagram showing an example of a schematic configuration of a microsurgical system to which the technology according to the present disclosure can be applied. In the following description, components similar to those in the endoscope system 5000 are assigned the same reference numerals, and redundant description thereof will be omitted.

[0119] 21 shows a schematic diagram of an operator 5067 performing surgery on a patient 5071 on a patient bed 5069 using a microsurgical system 5300. For simplicity, the illustration of the cart 5037 of the microsurgical system 5300 is omitted, and the illustration of the microscope device 5301 that replaces the endoscope 5001 is simplified. However, the microscope device 5301 in this description may refer to the microscope unit 5303 provided at the tip of the link 5035, or may refer to the entire configuration including the microscope unit 5303 and the support device 5027.

[0120] 21 , during surgery, a microsurgical system 5300 is used to capture an image of the surgical site captured by a microscope device 5301 and display it enlarged on a display device 5041 installed in an operating room. The display device 5041 is installed in a position facing the surgeon 5067, who performs various procedures on the surgical site, such as resecting the affected area, while observing the state of the surgical site using the image displayed on the display device 5041. Microsurgical systems are used, for example, in ophthalmic surgery and brain surgery.

[0121] The above describes examples of an endoscopic system 5000 and a microsurgery system 5300 to which the technology of the present disclosure can be applied. Note that the systems to which the technology of the present disclosure can be applied are not limited to these examples. For example, the support device 5027 may support another observation device or another surgical tool at its tip instead of the endoscope 5001 or the microscope unit 5303. Examples of such other observation devices include forceps, a surgeon, an insufflation tube for insufflation, or an energy treatment tool for incising tissue or sealing blood vessels by cauterization. Supporting these observation devices and surgical tools with a support device allows them to be more stably fixed in position than when medical staff support them manually, and also reduces the burden on medical staff. The technology of the present disclosure may be applied to support devices that support components other than the microscope unit.

[0122] The technology according to the present disclosure can be suitably applied to the endoscope 5001, the microscope device 5301, and the like, among the configurations described above. Specifically, the configurations according to the above-described embodiments can be applied to the endoscope system 5000, the microsurgery system 5300, and the like. By applying the technology according to the present disclosure to the endoscope system 5000, the microsurgery system 5300, and the like, it is possible to achieve improved adhesive strength.

[0123] <8. Supplementary Notes> The present technology may also have the following configurations. (1) An optical device comprising: an optical component; a holding member that holds the optical component; and an adhesive member that adheres the optical component to the holding member, wherein the holding member has a storage section that stores the adhesive member, and the storage section includes a plurality of storage chambers that store the adhesive member in contact with the optical component. (2) The optical device described in (1), wherein the storage section has a connecting chamber that connects the plurality of storage chambers and stores the adhesive member in contact with the optical component. (3) The optical device described in (2), wherein the connecting chamber is located above the storage section. (4) The optical device described in (3), wherein the connecting chamber has a wall that opens toward the optical component and a bottom that connects to the wall and the plurality of storage chambers. (5) The optical device described in (4), wherein the wall of the connecting chamber is formed in a U-shape in a plan view. (6) The optical device according to any one of (2) to (5), wherein the height of the connecting chamber is within a range of 20% to 30% of the total height of the storage chamber and the connecting chamber. (7) The optical device according to any one of (1) to (6), wherein each of the plurality of storage chambers has a wall surface that opens to the optical component side, and a bottom surface that connects to the wall surface. (8) The optical device according to (7), wherein each wall surface of the plurality of storage chambers is formed in a U-shape in plan view. (9) The optical device according to (7) or (8), wherein at least one of the plurality of storage chambers has a slope connecting the wall surface and the bottom surface, and the slope slopes gradually downward from the wall surface toward the bottom surface. (10) The optical device according to (9), wherein all of the plurality of storage chambers have the slope. (11) The optical device according to any one of (1) to (10), wherein the plurality of storage chambers are arranged in a line. (12) The optical device according to any one of (1) to (11), wherein the storage section has a wall section that separates the plurality of storage chambers. (13) The optical device according to (12), wherein the wall section has a slope connecting an upper surface and a front surface of the wall section, and the slope is inclined so as to gradually decrease from the upper surface toward the front surface.(14) The optical device according to any one of (1) to (13), wherein a plurality of the adhesive members are provided, and a plurality of the containers are provided corresponding to the number of the adhesive members. (15) The optical device according to (14), wherein the plurality of adhesive members are provided so as to face each other with the optical components therebetween, and the plurality of containers are provided so as to face each other with the optical components therebetween. (16) The optical device according to any one of (1) to (15), wherein the holding member is formed in a frame shape having an opening, and the optical component is provided so as to cover the opening. (17) The optical device according to any one of (1) to (16), wherein the optical component includes a prism having a reflecting surface, and the adhesive member is provided so as to contact the prism while avoiding the reflecting surface. (18) The optical device according to any one of (1) to (16), wherein the optical component includes an imaging element, and the adhesive member is provided so as to contact the imaging element. (19) A medical observation device comprising: an optical device; and an imaging element, wherein the optical device comprises: an optical component; a holding member that holds the optical component; and an adhesive member that adheres the optical component to the holding member, wherein the holding member has a storage section that stores the adhesive member, and the storage section includes a plurality of storage chambers that each store the adhesive member in contact with the optical component. (20) The medical observation device according to (19), wherein the optical device has the imaging element as the optical component. (21) A medical observation device comprising the optical device according to any one of (1) to (18). (22) An endoscope comprising the optical device according to any one of (1) to (18).

[0124] 1A Optical device 1B Optical device 10 Color separation prism 11 Prism 12 Prism 20 Holding member 20a Opening 21 First storage section 21a Storage chamber 21b Connecting chamber 21c Wall section 22 Second storage section 22a Storage chamber 22b Connecting chamber 22c Wall section 31 First adhesive member 31a Corner section 32 Second adhesive member 41 First imaging element 42 Second imaging element 50 Imaging unit 51 Imaging element substrate 51a Imaging element 52 Connector substrate 52a Connector 53 Flexible substrate 100 Medical observation device 110 Camera head 120 Optical system L10 Optical path L11 Optical path L12 Optical path M1 Reflecting surface M2 Surface M11 Wall surface M12 Bottom M21 Wall M22 Bottom M31 Slope M41 Slope M42 Top M43 Front

Claims

1. An optical device comprising: an optical component; a holding member that holds the optical component; and an adhesive member that adheres the optical component to the holding member, wherein the holding member has a storage section that stores the adhesive member, and the storage section includes a plurality of storage chambers that each store the adhesive member in contact with the optical component.

2. The optical device according to claim 1, wherein the storage section has a connecting chamber that connects the multiple storage chambers and stores the adhesive member in contact with the optical component.

3. The optical device according to claim 2, wherein the connecting chamber is located above the housing portion.

4. The optical device according to claim 3, wherein the connecting chamber has a wall surface that opens to the optical component side, and a bottom surface that connects to the wall surface and to the multiple storage chambers.

5. The optical device according to claim 4, wherein the wall surface of the connecting chamber is formed in a U-shape in a plan view.

6. The optical device according to claim 2, wherein the height of the connecting chamber is within a range of 20% to 30% of the total height of the storage chamber and the connecting chamber.

7. The optical device according to claim 1, wherein each of the plurality of storage chambers has a wall surface that opens to the optical component side, and a bottom surface that is connected to the wall surface.

8. The optical device according to claim 7, wherein the wall surfaces of each of the plurality of storage chambers are formed in a U-shape in a plan view.

9. The optical device according to claim 7, wherein at least one of the plurality of storage chambers has a slope connecting the wall surface and the bottom surface, the slope gradually decreasing from the wall surface toward the bottom surface.

10. The optical device according to claim 9, wherein all of the plurality of chambers have the inclined surface.

11. The optical device according to claim 1, wherein the plurality of chambers are arranged in a line.

12. The optical device according to claim 1, wherein the storage section has a wall section that separates the multiple storage chambers.

13. The optical device according to claim 12, wherein the wall portion has a slope connecting an upper surface and a front surface of the wall portion, the slope being gradually lowered from the upper surface toward the front surface.

14. The optical device according to claim 1, wherein a plurality of the adhesive members are provided, and a plurality of the containers are provided in accordance with the number of the adhesive members.

15. The optical device according to claim 14, wherein the adhesive members are arranged to face each other with the optical components therebetween, and the storage sections are arranged to face each other with the optical components therebetween.

16. The optical device according to claim 1, wherein the holding member is formed in a frame shape having an opening, and the optical component is arranged so as to cover the opening.

17. The optical device according to claim 1, wherein the optical component includes a prism having a reflecting surface, and the adhesive member is provided so as to contact the prism while avoiding the reflecting surface.

18. The optical device according to claim 1, wherein the optical component includes an imaging element, and the adhesive member is arranged to contact the imaging element.

19. A medical observation device comprising: an optical device; and an imaging element, wherein the optical device comprises an optical component; a holding member that holds the optical component; and an adhesive member that adheres the optical component to the holding member, wherein the holding member has a storage section that stores the adhesive member, and the storage section includes a plurality of storage chambers that each store the adhesive member in contact with the optical component.

20. The medical observation device according to claim 19, wherein the optical device has the imaging element as the optical component.

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