Endoscope camera handle

Abstract

The application discloses an endoscope camera handle. The endoscope camera handle comprises an optical adapter and a camera; the optical adapter comprises an outer cylinder, a plurality of lens groups arranged in the inner part of the outer cylinder, a moving lens barrel arranged outside a focusing lens group in the plurality of lens groups, the focusing lens group being fixed inside the moving lens barrel, a focusing assembly fixedly connected with the outside of the moving lens barrel, and the focusing assembly being used for moving the moving lens barrel along the optical axis when a user triggers a focusing operation; and the camera comprises a light splitting element, a white light imaging unit, and a fluorescent light imaging unit, the light splitting element being used for receiving light refracted by the optical adapter, refracting white light in the light on the white light imaging unit, and reflecting fluorescent light in the light on the fluorescent light imaging unit, the white light imaging unit being used for converting the received white light into a first electric signal and outputting the first electric signal, and the fluorescent light imaging unit being used for converting the received fluorescent light into a second electric signal and outputting the second electric signal.

Description

Technical Field

[0001] This application relates to the field of medical technology, and in particular to an endoscope camera handle. Background Technology

[0002] Endoscopic devices are commonly used medical instruments. Doctors can use the endoscope's camera handle to collect images of lesions inside the patient's body and formulate the best treatment plan accordingly.

[0003] However, due to limitations in the fluorescence optical path design of existing technologies in dual-optical-path scenarios, the incident angle of the principal ray on the target surface is relatively small. This necessitates the use of small target surfaces to ensure that the size of the camera handle remains constant. However, with small target surface imaging, the resulting pixel size is small, leading to unclear imaging of lesion areas.

[0004] Therefore, ensuring clear imaging when using white light and fluorescence for site examination is a problem that urgently needs to be solved in this field. Summary of the Invention

[0005] To address the problems in the prior art, this application provides an endoscope camera handle to solve the problem that the prior art cannot achieve clear imaging with dual optical paths.

[0006] In a first aspect, embodiments of this application provide an endoscope camera handle, the endoscope camera handle including an optical adapter and a camera;

[0007] The optical adapter includes:

[0008] outer cylinder;

[0009] Multiple lens groups are disposed inside the outer cylinder to focus or diverge the light returning from the detection area;

[0010] A movable lens barrel is disposed outside the focusing lens group among the plurality of lens groups, and the focusing lens group is fixed inside the movable lens barrel;

[0011] A focusing assembly is fixedly connected to the outside of the movable lens barrel; when the user triggers a focusing operation, the focusing assembly is used to move the movable lens barrel along the optical axis.

[0012] The camera includes:

[0013] A beam splitter is used to receive light rays refracted by the optical adapter and to split the light rays.

[0014] An imaging unit is used to convert the received, split light rays into electrical signals and output them.

[0015] The imaging unit includes a white light imaging unit and a fluorescence imaging unit.

[0016] The beam splitter refracts white light in the light beam onto the white light imaging unit and reflects fluorescence in the light beam onto the fluorescence imaging unit. The first imaging range of the white light on the white light imaging unit is greater than a first threshold, and the second imaging range of the fluorescence on the fluorescence imaging unit is greater than a second threshold.

[0017] The white light imaging unit is used to convert the received white light into a first electrical signal and output the first electrical signal.

[0018] The fluorescence imaging unit is used to convert the received fluorescence into a second electrical signal and output the second electrical signal.

[0019] The above technical solution has the following advantages or beneficial effects: In this embodiment, the beam splitting element and imaging unit in the camera can separate white light and fluorescence in the light beam, causing the white light to refract onto the white light imaging unit and the fluorescence to reflect onto the fluorescence imaging unit, thereby achieving imaging in a dual-light-path scene. Furthermore, based on the structural relationship between the focusing component in the optical adapter and the moving lens barrel with the focusing lens group fixed, when the user triggers the focusing operation, the moving lens barrel can be moved through the focusing component to achieve focusing within the endoscope camera handle. By combining multiple lens groups in this embodiment, the focal length can be effectively adjusted, improving the quality of the image data acquired by the camera handle, thereby ensuring that the endoscope device can clearly image based on the image data acquired by the endoscope camera handle.

[0020] In one possible implementation, the distance between the white light imaging unit and the beam splitter is less than the distance between the fluorescence imaging unit and the beam splitter; for each position of the light returned from the detection site, the white light in the light is refracted by the beam splitter at a first position on the white light imaging unit, and the fluorescence in the light is reflected by the beam splitter at a second position on the fluorescence imaging unit, wherein the relative positions of the first position on the white light imaging unit and the second position on the fluorescence imaging unit are the same.

[0021] The above technical solution has the following advantages or beneficial effects: Since white light and fluorescence have different wavelengths, and different wavelengths have different refractive indices in the same lens, this application embodiment, based on the difference between the wavelengths of white light and fluorescence, sets the distance between the white light imaging unit and the beam splitter to be smaller than the distance between the fluorescence imaging unit and the beam splitter, enabling both white light and fluorescence to be clearly imaged simultaneously. Furthermore, based on the multiple lens groups in this application embodiment, the relative position of the first position of white light refraction on the white light imaging unit is the same as the relative position of the second position of fluorescence reflection on the fluorescence imaging unit, thereby ensuring accurate fusion of the white light image and the fluorescence image and improving the quality of the fused image.

[0022] In one possible implementation, the focusing operation is an operation by which the user rotates the outer cylinder in a direction perpendicular to the optical axis; or

[0023] The focusing operation is triggered by the user through the focusing interface.

[0024] The above technical solution has the following advantages or beneficial effects: the user's operation of rotating the outer barrel in a direction perpendicular to the optical axis, or the operation triggered by the user through the focusing interface, can move the lens barrel, thereby realizing the internal focusing process.

[0025] In one possible implementation, each lens group includes at least two lenses, and the plurality of lens groups, along the optical axis from the object side to the image side, sequentially include:

[0026] A first lens group with positive optical power, wherein the object side surface of the first lens in the first lens group along the path from the object side to the image side is convex, and the first lens group is used to focus light rays;

[0027] The second lens group has a negative optical power. The object side of the first lens in the second lens group along the path from the object side to the image side is concave. The second lens group is used to diverge light rays.

[0028] A third lens group with positive optical power is used to focus light rays.

[0029] The above technical solution has the following advantages or beneficial effects: Since white light and fluorescence have different wavelengths, and different wavelengths have different refractive indices in the same lens, the embodiments of this application design the above lens structure based on the difference between the wavelengths of white light and fluorescence, thereby ensuring that the white light image corresponding to the white light path and the fluorescence image corresponding to the fluorescence path can be clearly imaged and accurately fused.

[0030] In one possible implementation, if the focusing lens group is the first lens group among the plurality of lens groups...

[0031] The first lens group includes a first biconvex lens and a first cemented lens; the object side of the first cemented lens is convex, and the image side is concave.

[0032] The second lens group is a second cemented lens, and both the object-side and image-side surfaces of the second cemented lens are concave.

[0033] The third lens group includes a third cemented lens, a fourth cemented lens, and a first meniscus lens; the object-side surface of the third cemented lens is flat, and the image-side surface is convex; both the object-side surface and the image-side surface of the fourth cemented lens are convex; and the image-side surface of the first meniscus lens is concave.

[0034] The above technical solution has the following advantages or beneficial effects: When the focusing lens group is the first lens group, the above lens structure ensures that the white light image corresponding to the white light path and the fluorescence image corresponding to the fluorescence path can be clearly imaged and accurately fused, thereby making the imaging range larger and realizing large target surface imaging.

[0035] In one possible implementation,

[0036] The first cemented lens includes a second biconvex lens and a first biconcave lens cemented together;

[0037] The second cemented lens includes a second meniscus lens and a second biconcave lens cemented together;

[0038] The third cemented lens comprises a first plano-convex lens and a third meniscus lens cemented together.

[0039] The fourth cemented lens comprises a fourth meniscus lens and a third biconvex lens cemented together.

[0040] The above technical solution has the following advantages or beneficial effects: When the focusing lens group is the first lens group, the above lens structure ensures that the white light image corresponding to the white light path and the fluorescence image corresponding to the fluorescence path can be clearly imaged and accurately fused, thereby making the imaging range larger and realizing large target surface imaging.

[0041] In one possible implementation, if the focusing lens group is the third lens group among the plurality of lens groups,

[0042] Then the first lens group is the fifth cemented lens; the object side and image side of the fifth cemented lens are both convex surfaces;

[0043] The second lens group includes a sixth cemented lens, a seventh cemented lens, and an eighth cemented lens; the object-side and image-side of the sixth cemented lens are both concave, and the object-side of the seventh and eighth cemented lenses are both concave, while the image-side of each is convex.

[0044] The third lens group is the ninth cemented lens; both the object side and the image side of the ninth cemented lens are convex.

[0045] The above technical solution has the following advantages or beneficial effects: When the focusing lens group is the third lens group, the above lens structure makes it easier to achieve one-button focusing via motor, while ensuring that the white light image corresponding to the white light path and the fluorescence image corresponding to the fluorescence path can be clearly imaged and accurately fused.

[0046] In one possible implementation,

[0047] The fifth cemented lens includes a fourth biconvex lens and a fifth meniscus lens cemented together.

[0048] The sixth cemented lens includes a third biconcave lens and a sixth meniscus lens cemented together.

[0049] The seventh cemented lens includes a fourth biconcave lens and a fifth biconvex lens cemented together.

[0050] The eighth cemented lens includes a first plano-concave lens and a second plano-convex lens cemented together.

[0051] The ninth cemented lens includes a sixth biconvex lens and a seventh meniscus lens cemented together.

[0052] The above technical solution has the following advantages or beneficial effects: When the focusing lens group is the third lens group, the above lens structure makes it easier to achieve one-button focusing via motor, while ensuring that the white light image corresponding to the white light path and the fluorescence image corresponding to the fluorescence path can be clearly imaged and accurately fused.

[0053] In one possible implementation,

[0054] If the focusing lens group is the first lens group among the plurality of lens groups, then the first threshold and the second threshold are both 12 mm;

[0055] If the focusing lens group is the third lens group among the plurality of lens groups, then the first threshold and the second threshold are both 8 mm.

[0056] The above technical solution has the following advantages or beneficial effects: for different focusing lens groups and different lens structure designs, when the focusing lens group is the first lens group, the imaging range can be greater than 12 mm, and when the focusing lens group is the third lens group, the imaging range can be greater than 8 mm.

[0057] In one possible implementation, the object distance variation range corresponding to the focusing lens group is -800mm to +50mm.

[0058] The above technical solution has the following advantages or beneficial effects: The embodiments of this application can achieve a range of object distance variation from -800mm to +50mm through the internal focusing design, thus realizing a wide range of focusing.

[0059] In a second aspect, this application provides an endoscope including a camera handle as described in any of the first aspects. Attached Figure Description

[0060] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0061] Figure 1 This is a schematic diagram of the structure of an endoscope device provided in an embodiment of this application;

[0062] Figure 2 A schematic diagram of a camera handle provided in an embodiment of this application;

[0063] Figure 3 This application provides a schematic diagram of the internal structure of a camera handle according to an embodiment of the present application;

[0064] Figure 4 A schematic diagram of a multiple lens group structure provided in an embodiment of this application. Figure 1 ;

[0065] Figure 5 A schematic diagram of spectral dispersion provided for an embodiment of this application. Figure 1 ;

[0066] Figure 6 A schematic diagram showing a first lens group located at different positions on the optical axis, provided for embodiments of this application;

[0067] Figure 7 A schematic diagram of a multiple lens group structure provided in an embodiment of this application. Figure 2 ;

[0068] Figure 8 A schematic diagram of spectral dispersion provided for an embodiment of this application. Figure 2 ;

[0069] Figure 9 A schematic diagram showing a third lens group located at different positions on the optical axis, provided for embodiments of this application;

[0070] Figure 10 This is a schematic diagram of a beam splitting filter provided in an embodiment of this application. Detailed Implementation

[0071] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0072] Furthermore, in the description of the embodiments of this application, unless otherwise stated, "and" means "or", for example, A / B can mean A or B; "and / or" in the text is merely a description of the relationship between related objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone.

[0073] Specifically, in the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).

[0074] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0075] The following explanations of some terms used in the embodiments of this application are provided to facilitate understanding by those skilled in the art.

[0076] 1. 4K: refers to a sensor resolution of 3840*2160.

[0077] 2. Dual-path optical system: Specifically refers to visible light and fluorescence (infrared light), where the two light sources are simultaneously imaged and fused.

[0078] 3. Internal focusing: This refers to focusing by moving some optical elements within the front and rear lens elements, while keeping the entire lens fixed in its spatial position. Overall movement refers to focusing by moving the lens forward or backward within a given space, while maintaining the lens's overall length.

[0079] The design concept of the embodiments of this application is briefly introduced below:

[0080] Endoscopic devices are commonly used medical instruments. Doctors can use the endoscope's camera handle to collect images of lesions inside the patient's body and formulate the best treatment plan accordingly.

[0081] However, due to limitations in the fluorescence optical path design of existing technologies in dual-optical-path scenarios, the incident angle of the principal ray on the target surface is relatively small. This necessitates the use of small target surfaces to ensure that the size of the camera handle remains constant. However, with small target surface imaging, the resulting pixel size is small, leading to unclear imaging of lesion areas.

[0082] Therefore, when using white light and fluorescence for site examination, how to ensure large target area imaging and achieve accurate fusion of white light and fluorescence images is a problem that urgently needs to be solved in this field.

[0083] To address the aforementioned issues, the endoscope camera handle in this application includes an optical adapter and a camera;

[0084] Optical adapter, including:

[0085] outer cylinder;

[0086] Multiple lens groups are set inside the outer cylinder to focus or diverge the light returning from the detection area;

[0087] The movable lens barrel is located outside the focusing lens group among multiple lens groups, and the focusing lens group is fixed inside the movable lens barrel;

[0088] The focusing assembly is fixedly connected to the outside of the moving lens barrel; when the user triggers the focusing operation, the focusing assembly is used to move the moving lens barrel along the optical axis.

[0089] Cameras, including:

[0090] A beam splitter is used to receive light rays refracted by an optical adapter and to split the light rays.

[0091] An imaging unit is used to convert the received, split light rays into electrical signals and output them.

[0092] The imaging unit includes a white light imaging unit and a fluorescence imaging unit.

[0093] The beam splitter refracts white light in the light beam onto the white light imaging unit and reflects fluorescence in the light beam onto the fluorescence imaging unit. The first imaging range of white light on the white light imaging unit is greater than a first threshold, and the second imaging range of fluorescence on the fluorescence imaging unit is greater than a second threshold.

[0094] The white light imaging unit is used to convert the received white light into a first electrical signal and output the first electrical signal.

[0095] A fluorescence imaging unit is used to convert the received fluorescence into a second electrical signal and output the second electrical signal.

[0096] After introducing the design concept of the embodiments of this application, the application scenarios set by this application are briefly described below. It should be noted that the following scenarios are only used to illustrate the embodiments of this application and are not intended to limit it. In specific implementation, the technical solutions provided by the embodiments of this application can be flexibly applied according to actual needs.

[0097] Figure 1 An exemplary schematic diagram of an endoscope device according to an embodiment of this application is shown, wherein the endoscope device includes a cold light source, a camera assembly, and a display.

[0098] The camera module can be used to capture images of endoscopic examinations and surgeries to obtain visual data. Its key components may include one or more of the following: a camera, buttons, a camera unit, a CMOS (Complementary Metal-Oxide-Semiconductor) image sensor, a video cable, an optical adapter, an objective lens field of view, a lens rod, a communication port, and a video output interface. The camera unit can be connected to a monitor via the video output interface and to a cold light source unit via the communication port.

[0099] In this embodiment of the application, the objective lens field of view, lens rod, optical adapter, button, CMOS and camera in the key components of the camera assembly can also be collectively referred to as an endoscope camera.

[0100] The monitor can be used to display endoscopic images acquired and generated by the camera component.

[0101] Cold light sources can be used to provide illumination for endoscopes during endoscopic examinations and surgeries; their key components typically include: a cold light source main unit, a beam guide, a communication port, and a cold light source output interface.

[0102] It should be understood that, Figure 1 The schematic diagram of the endoscopic device shown is merely an example, and the endoscopic device can have more than... Figure 1The more or fewer components shown can be combined into two or more components, or they can have different component configurations. The various components shown in the figure can be implemented in hardware, software, or a combination of hardware and software, including one or more signal processing and / or application-specific integrated circuits.

[0103] The foregoing provides many different implementation methods or examples for implementing different structures of this application. To simplify the content of the embodiments of this application, only the components and settings of specific examples are described above. Of course, these are merely examples and are not intended to limit this application.

[0104] During the procedure, the operator holds the endoscope camera handle, aligns the endoscope's mount with the area to be examined, and maintains a certain distance from the object. Specifically, as follows... Figure 2 As shown.

[0105] It should be noted that, Figure 2 The camera handle shown is for illustrative purposes only; the actual camera handle used is not limited to this type. Figure 2 The camera handle shown.

[0106] This application provides an endoscope camera handle, which includes an optical adapter and a camera. The optical adapter includes an outer tube, multiple lens groups, a movable endoscope tube, and a focusing assembly. The camera includes a beam splitter and an imaging unit, which includes a white light imaging unit and a fluorescence imaging unit.

[0107] In this embodiment, the outer barrel is located on the outermost side of the adapter in the camera handle; multiple lens groups are disposed inside the outer barrel for focusing or diverging the light returned from the detection area; a movable lens barrel is disposed outside the focusing lens group among the multiple lens groups, and the focusing lens group is fixed inside the movable lens barrel; a focusing assembly is fixedly connected to the outer side of the movable lens barrel; when the user triggers the focusing operation, the focusing assembly is used to move the movable lens barrel along the optical axis.

[0108] Optionally, the focusing component in this embodiment can be a guide pin in a cam mechanism. The cam mechanism further includes a middle lens barrel, located inside the outer barrel and outside the moving lens barrel. The middle lens barrel has a guide groove with a cam curve, facing the moving lens barrel, and the guide pin fixed to the outside of the moving lens barrel is located inside the guide groove. When the user triggers the focusing operation, the middle lens barrel rotates in a direction perpendicular to the optical axis, causing the guide pin to move in the guide groove on the middle lens barrel, thereby causing the moving lens barrel to move along the optical axis.

[0109] It should be noted that when the user triggers the focusing operation, the position of the outer barrel on the optical axis remains unchanged, but the relative position between the moving lens barrel and the outer barrel changes.

[0110] Optionally, the focusing operation is an operation in which the user rotates the outer tube in a direction perpendicular to the optical axis; or the focusing operation is an operation triggered by the user through the focusing interface.

[0111] In this embodiment, when the user rotates the outer tube, it causes the middle tube to rotate in a direction perpendicular to the optical axis. The middle tube then causes the guide pin to move in the guide groove on the middle tube, thereby causing the moving tube to move along the optical axis.

[0112] The focusing interface in this application embodiment can be a physical button set on the outside of the camera handle, or it can be a focusing control on the external display screen of the camera handle. This application does not limit it in this way.

[0113] Optionally, embodiments of this application may also include a motor, which drives the focusing component to move after the user triggers the focusing operation through the focusing interface, thereby driving the moving lens barrel to move along the optical axis.

[0114] For example, after the user triggers the focusing operation through the focusing interface, the motor drives the middle lens barrel to rotate in a direction perpendicular to the optical axis, which in turn drives the guide pin to move in the guide groove on the middle lens barrel, thereby driving the moving lens barrel to move along the optical axis.

[0115] In practice, taking a physical button as an example, the user can trigger the focusing operation by pressing the physical button. The motor will then drive the focusing component to move, thereby moving the lens barrel along the optical axis, thus achieving one-button focusing.

[0116] In this embodiment, the beam splitter is used to receive light refracted by the optical adapter and split the light; the imaging unit is used to convert the received split light into an electrical signal and output it.

[0117] In this embodiment, the beam-splitting element refracts white light in the light beam onto a white light imaging unit and reflects fluorescence in the light beam onto a fluorescence imaging unit. The first imaging range of white light on the white light imaging unit is larger than a first threshold, and the second imaging range of fluorescence on the fluorescence imaging unit is larger than a second threshold. The white light imaging unit converts the received white light into a first electrical signal and outputs the first electrical signal; the fluorescence imaging unit converts the received fluorescence into a second electrical signal and outputs the second electrical signal.

[0118] Optionally, the beam-splitting element in the embodiments of this application can be any one of a beam-splitting prism, a beam-splitting filter, or a polarizing beam-splitting prism, and this application does not limit it.

[0119] By using a beam-splitting filter, the optical path can be shortened and costs reduced while achieving beam splitting. When the illumination path is polarized light illumination, or when polarized light is incident on the camera system, different beam splitting effects can be obtained by using a polarizing beam-splitting prism.

[0120] It should be noted that the white light imaging unit and the fluorescence imaging unit in the embodiments of this application can be the same or different CMOS sensors, for example, both can be 4K sensors.

[0121] Here, 4K refers to a sensor resolution of 3840*2160.

[0122] It should be noted that, by using a 4K sensor and incorporating the design of the camera handle in this application embodiment, 4K imaging effect can be achieved in both the white light imaging unit and the fluorescence imaging unit.

[0123] In this embodiment, the white light imaging unit and the fluorescence imaging unit are located at different positions on the beam-splitting element. The white light imaging unit and the fluorescence imaging unit are respectively positioned at a distance of 1-3 mm from the beam-splitting element.

[0124] In this embodiment, the distance between the white light imaging unit and the beam splitter is less than the distance between the fluorescence imaging unit and the beam splitter. Because white light and fluorescence have different wavelengths, their refractive indices in the lens are different. This embodiment not only overcomes the problem of different wavelengths of white light and fluorescence through lens design, but also achieves clear imaging of both white light and fluorescence simultaneously by adjusting the positions of the white light imaging unit and the fluorescence imaging unit relative to the optical unit.

[0125] During implementation, for the light rays returning from each position on the detection area, the white light in the light rays is refracted by the beam splitter to a first position on the white light imaging unit, and the fluorescence in the light rays is reflected by the beam splitter to a second position on the fluorescence imaging unit. The relative positions of the first position on the white light imaging unit and the second position on the fluorescence imaging unit are the same. This enables precise fusion of the white light image and the fluorescence image.

[0126] This application provides a schematic diagram of a camera handle structure, taking an adapter comprising three lens groups as an example, and specifically the first lens group on the object side as a focusing lens group. Figure 3 The diagram shows a cross-sectional view of the camera handle. The endoscope camera handle includes an optical adapter 10 and a camera 20. The optical adapter includes an outer tube 11, a focusing assembly 12, a movable lens tube 13, and a first lens group 031, a second lens group 032, and a third lens group 033 among multiple lens groups 03. The camera 20 includes a beam splitter 21 and an imaging unit 22, the imaging unit including a white light imaging unit 221 and a fluorescence imaging unit 222.

[0127] Regarding the multiple lens groups in the embodiments of this application, each lens group includes at least two lenses, and the multiple lens groups, along the optical axis from the object side to the image side, sequentially include:

[0128] The first lens group has positive optical power. The object side of the first lens in the first lens group along the path from the object side to the image side is convex. The first lens group is used to focus light rays.

[0129] The second lens group has a negative optical power. The object side of the first lens in the second lens group is concave along the path from the object side to the image side. The second lens group is used to diverge light rays.

[0130] The third lens group has a positive optical power and is used to focus light rays.

[0131] The adapter in this embodiment may further include a protective glass located on the object side of the first lens group.

[0132] Optionally, the focusing lens can be any one of multiple lens groups.

[0133] In one optional embodiment, if the focusing lens group is the first lens group among multiple lens groups, the first lens group includes a first biconvex lens and a first cemented lens; the object-side surface of the first cemented lens is convex, and the image-side surface is concave; the second lens group is a second cemented lens, and both the object-side surface and the image-side surface of the second cemented lens are concave; the third lens group includes a third cemented lens, a fourth cemented lens, and a first meniscus lens; the object-side surface of the third cemented lens is planar, and the image-side surface is convex, both the object-side surface and the image-side surface of the fourth cemented lens are convex, and the image-side surface of the first meniscus lens is concave.

[0134] The first cemented lens includes a second biconvex lens and a first biconcave lens cemented together; the second cemented lens includes a second meniscus lens and a second biconcave lens cemented together; the third cemented lens includes a first plano-convex lens and a third meniscus lens cemented together; and the fourth cemented lens includes a fourth meniscus lens and a third biconvex lens cemented together.

[0135] like Figure 4 As shown in the illustration, this application provides a schematic diagram of a multi-lens group structure. Figure 1Among them, 0311 is the first biconvex lens in the first lens group, 0312 is the second biconvex lens in the first cemented lens, and 0313 is the first biconcave lens in the first cemented lens. 0321 is the second meniscus lens in the second cemented lens, and 0322 is the second biconcave lens in the second cemented lens. 0331 is the first plano-convex lens in the third cemented lens, and 0332 is the third meniscus lens in the third cemented lens. 0333 is the fourth meniscus lens in the fourth cemented lens, 0334 is the third biconvex lens in the fourth cemented lens, and 0335 is the first meniscus lens in the third lens group.

[0136] Optionally, the distance between the first lens group and the protective glass is generally a structural requirement, such as >2mm.

[0137] against Figure 4 The lens structure shown is a schematic diagram of a beam splitting scheme according to an embodiment of this application. Figure 1 ,like Figure 5 As shown. Among them, Figure 5 Take a beam splitter as an example.

[0138] against Figure 5 The schematic diagram of the first lens group at different positions on the optical axis during the movement of the first lens group is shown in the following example. Figure 6 As shown. If the first lens group is located at the position closest to the image side within the inner adjustment range, then as... Figure 6 As shown in case a; if the first lens group is located in the middle position within the inner adjustment range, then as Figure 6 As shown in case b; if the first lens group is located at the position closest to the object side within the inner adjustment range, then as... Figure 6 As shown in case c.

[0139] For example, such as Figure 6 As shown, the position closest to the image side in the internal adjustment range is 0.94 mm between the lens closest to the image side in the first lens group and the lens closest to the object side in the second lens group. The middle position in the internal adjustment range is 2 mm between the lens closest to the image side in the first lens group and the lens closest to the object side in the second lens group. The position closest to the object side in the internal adjustment range is 4.6 mm between the lens closest to the image side in the first lens group and the lens closest to the object side in the second lens group.

[0140] Optionally, if the focusing lens group is the first lens group among multiple lens groups, then the first threshold and the second threshold are 12 mm.

[0141] In this embodiment, the first threshold and the second threshold are diameter thresholds of light rays in the imaging unit region. Therefore, when the focusing lens group is the first lens group, the diameter of the imaging region of white light on the white light imaging unit is greater than 12 mm, and the diameter of the imaging region of fluorescence on the fluorescence imaging unit is greater than 12 mm.

[0142] Using the in-front focusing method, which is to focus by moving the first lens group, simplifies the optical design (reducing the length by 25%) and makes the optical adapter smaller. With the target area and the single pixel area more than doubled, it is easier for operators to observe the lesion and to handle the device. It also fully improves the amount of light energy received, reduces noise, and improves image quality.

[0143] In the front group in-focusing mode, this optical path design takes into account both visible light and fluorescence. The dual optical paths are optimized simultaneously and share the same lens part. The two light paths are separated by a beam splitter. Through design optimization, the optical path difference between the two optical paths is compensated at the rear end, so that both paths can be imaged clearly at the same time. At the same time, visible light and fluorescence can be focused simultaneously, and the visible light and fluorescence dual optical paths can be fused in real time.

[0144] In one optional embodiment, if the focusing lens group is the third lens group among the plurality of lens groups, then the first lens group is a fifth cemented lens; the object-side and image-side of the fifth cemented lens are both convex; the second lens group includes a sixth cemented lens, a seventh cemented lens, and an eighth cemented lens; the object-side and image-side of the sixth cemented lens are both concave, and the object-side of the seventh cemented lens and the eighth cemented lens are both concave, and their image-sides are both convex; the third lens group is a ninth cemented lens; the object-side and image-side of the ninth cemented lens are both convex.

[0145] The fifth cemented lens includes a fourth biconvex lens and a fifth meniscus lens cemented together; the sixth cemented lens includes a third biconcave lens and a sixth meniscus lens cemented together; the seventh cemented lens includes a fourth biconcave lens and a fifth biconvex lens cemented together; the eighth cemented lens includes a first plano-concave lens and a second plano-convex lens cemented together; and the ninth cemented lens includes a sixth biconvex lens and a seventh meniscus lens cemented together.

[0146] like Figure 7 As shown in the illustration, this application provides a schematic diagram of a multi-lens group structure. Figure 2Among them, 0311 is the fourth biconvex lens in the fifth cemented lens, and 0312 is the fifth meniscus lens in the fifth cemented lens. 0321 is the third biconcave lens in the sixth cemented lens, and 0322 is the sixth meniscus lens in the sixth cemented lens. 0323 is the fourth biconcave lens in the seventh cemented lens, and 0324 is the fifth biconvex lens in the seventh cemented lens. 0325 is the first plano-concave lens in the eighth cemented lens, and 0326 is the second plano-convex lens in the eighth cemented lens. 0331 is the sixth biconvex lens in the ninth cemented lens, and 0332 is the seventh meniscus lens in the ninth cemented lens.

[0147] It should be noted that when the focusing lens group is the third lens group, the third lens group is fixed at... Figure 3 The inside of the movable lens tube.

[0148] against Figure 7 The lens structure shown is a schematic diagram of a beam splitting scheme according to an embodiment of this application. Figure 2 ,like Figure 8 As shown. Among them, Figure 8 Take a beam splitter or polarizing beam splitter as an example.

[0149] against Figure 8 The schematic diagram of the third lens group at different positions on the optical axis during the movement of the third lens group is shown in the following figure. Figure 9 As shown. If the third lens group is located at the position closest to the image side within the inner adjustment range, then as... Figure 9 As shown in case a; if the third lens group is located in the middle position within the inner adjustment range, then as Figure 9 As shown in case b; if the third lens group is located at the position closest to the object side within the inner adjustment range, then as... Figure 9 As shown in case c.

[0150] For example, such as Figure 9 As shown, the position closest to the image side within the internal adjustment range is the position where the distance between the lens closest to the object side in the third lens group and the lens closest to the image side in the second lens group is 6.4 mm. The middle position within the internal adjustment range is the position where the distance between the lens closest to the object side in the third lens group and the lens closest to the image side in the second lens group is 4.6 mm. The position closest to the object side within the internal adjustment range is the position where the distance between the lens closest to the object side in the third lens group and the lens closest to the image side in the second lens group is 0.3 mm.

[0151] Optionally, embodiments of this application may also use a spectrophotometer as an example, such as... Figure 10 As shown, this application embodiment presents a schematic diagram of a beam splitting scheme including a beam splitting filter.

[0152] Optionally, if the focusing lens group is the third lens group among multiple lens groups, then the first threshold and the second threshold are 8 mm.

[0153] In this embodiment, the first threshold and the second threshold are diameter thresholds of light rays in the imaging unit region. Therefore, when the focusing lens group is the third lens group, the diameter of the imaging area of ​​white light on the white light imaging unit is greater than 8 mm, and the diameter of the imaging area of ​​fluorescence on the fluorescence imaging unit is greater than 8 mm.

[0154] The rear-group in-focusing solution, which achieves in-focusing by moving the third lens group, has a simpler adapter design and optical path compared to the existing overall focusing solution. The motor controls the last lens group, making the structure easier to place and the circuit easier to connect, thus facilitating the implementation of autofocus or one-click focusing functions. By moving the last lens group for focusing, the solution reduces the size of the camera, providing more space for components such as the motor. It is also lighter and can easily meet the motor's load requirements, thereby enabling one-click focusing or autofocus functions.

[0155] In the rear-group in-focusing scheme, this optical path design takes into account both visible light and fluorescence. The dual optical paths are optimized simultaneously and share the same lens section. The two light paths are separated by a beam splitter. Through design optimization, the optical path difference between the two optical paths is compensated at the rear end, so that both paths can be imaged clearly at the same time. At the same time, visible light and fluorescence can be focused simultaneously, and the visible light and fluorescence dual optical paths can be fused in real time.

[0156] It should be noted that in this embodiment of the application, only the focusing lens group is moved when internal focusing is performed, while the positions of other lens groups on the optical axis remain fixed.

[0157] In this embodiment of the application, the object distance variation range corresponding to the focusing lens group is -800mm to +50mm.

[0158] In this embodiment of the application, the endoscope device further includes a camera host. The camera handle transmits a first electrical signal and a second electrical signal to the camera host, so that the camera host obtains the endoscopic image data after the fusion of white light and fluorescence based on the first electrical signal and the second electrical signal, and displays the endoscopic image fused with white light and fluorescence through a display connected to the camera host.

[0159] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0160] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to this application. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0161] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0162] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0163] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. An endoscope camera handle, characterized in that, The endoscope camera handle includes an optical adapter and a camera; The optical adapter includes: outer cylinder; Multiple lens groups are disposed inside the outer cylinder to focus or diverge the light returning from the detection area; A movable lens barrel is disposed outside the focusing lens group among the plurality of lens groups, and the focusing lens group is fixed inside the movable lens barrel; wherein, the plurality of lens groups, along the optical axis from the object side to the image side, sequentially include a first lens group with positive optical power, a second lens group with negative optical power, and a third lens group with positive optical power; the focusing lens group is the first lens group among the plurality of lens groups, and the first lens group includes a first biconvex lens and a first cemented lens; the object side of the first cemented lens is convex, and the image side is concave; the second lens group is a second cemented lens, and both the object side and the image side of the second cemented lens are concave. The third lens group includes a third cemented lens, a fourth cemented lens, and a first meniscus lens; the object-side surface of the third cemented lens is planar, and the image-side surface is convex; both the object-side surface and the image-side surface of the fourth cemented lens are convex; the image-side surface of the first meniscus lens is concave; the first cemented lens includes a second biconvex lens and a first biconcave lens cemented together; the second cemented lens includes a second meniscus lens and a second biconcave lens cemented together; the third cemented lens includes a first plano-convex lens and a third meniscus lens cemented together; the fourth cemented lens includes a fourth meniscus lens and a third biconvex lens cemented together. A focusing assembly is fixedly connected to the outside of the movable lens barrel; when the user triggers a focusing operation, the focusing assembly is used to move the movable lens barrel along the optical axis. The camera includes: A beam splitter is used to receive light rays refracted by the optical adapter and to split the light rays. An imaging unit is used to convert the received, split light rays into electrical signals and output them. The imaging unit includes a white light imaging unit and a fluorescence imaging unit. The beam splitter refracts white light in the light beam onto the white light imaging unit and reflects fluorescence in the light beam onto the fluorescence imaging unit. The first imaging range of the white light on the white light imaging unit is greater than a first threshold, and the second imaging range of the fluorescence on the fluorescence imaging unit is greater than a second threshold. The white light imaging unit is used to convert the received white light into a first electrical signal and output the first electrical signal. The fluorescence imaging unit is used to convert the received fluorescence into a second electrical signal and output the second electrical signal.

2. An endoscope camera handle, characterized in that, The endoscope camera handle includes an optical adapter and a camera; The optical adapter includes: outer cylinder; Multiple lens groups are disposed inside the outer cylinder to focus or diverge the light returning from the detection area; A movable lens barrel is disposed outside the focusing lens group among the plurality of lens groups, and the focusing lens group is fixed inside the movable lens barrel; wherein, the plurality of lens groups, along the optical axis from the object side to the image side, sequentially include a first lens group with positive optical power, a second lens group with negative optical power, and a third lens group with positive optical power; the focusing lens group is the third lens group among the plurality of lens groups, and the first lens group is a fifth cemented lens; the object side and image side of the fifth cemented lens are both convex; the second lens group includes a sixth cemented lens, a seventh cemented lens, and an eighth cemented lens; the object side and image side of the sixth cemented lens are both concave, the object side and image side of the fifth cemented lens are both concave, ... The object-side surfaces of the seventh and eighth cemented lenses are both concave, and the image-side surfaces are both convex; the third lens group is the ninth cemented lens; both the object-side and image-side surfaces of the ninth cemented lens are convex; the fifth cemented lens includes a fourth biconvex lens and a fifth meniscus lens cemented together; the sixth cemented lens includes a third biconcave lens and a sixth meniscus lens cemented together; the seventh cemented lens includes a fourth biconcave lens and a fifth biconvex lens cemented together; the eighth cemented lens includes a first plano-concave lens and a second plano-convex lens cemented together; the ninth cemented lens includes a sixth biconvex lens and a seventh meniscus lens cemented together. A focusing assembly is fixedly connected to the outside of the movable lens barrel; when the user triggers a focusing operation, the focusing assembly is used to move the movable lens barrel along the optical axis. The camera includes: A beam splitter is used to receive light rays refracted by the optical adapter and to split the light rays. An imaging unit is used to convert the received, split light rays into electrical signals and output them. The imaging unit includes a white light imaging unit and a fluorescence imaging unit. The beam splitter refracts white light in the light beam onto the white light imaging unit and reflects fluorescence in the light beam onto the fluorescence imaging unit. The first imaging range of the white light on the white light imaging unit is greater than a first threshold, and the second imaging range of the fluorescence on the fluorescence imaging unit is greater than a second threshold. The white light imaging unit is used to convert the received white light into a first electrical signal and output the first electrical signal. The fluorescence imaging unit is used to convert the received fluorescence into a second electrical signal and output the second electrical signal.

3. The endoscope camera handle according to claim 1 or 2, characterized in that, The distance between the white light imaging unit and the beam splitter is less than the distance between the fluorescence imaging unit and the beam splitter; for the light rays returned from each position on the detection area, the white light in the light rays is refracted by the beam splitter at a first position on the white light imaging unit, and the fluorescence in the light rays is reflected by the beam splitter at a second position on the fluorescence imaging unit, wherein the relative position of the first position on the white light imaging unit is the same as the relative position of the second position on the fluorescence imaging unit.

4. The endoscope camera handle according to claim 1 or 2, characterized in that, The focusing operation is performed by the user rotating the outer cylinder in a direction perpendicular to the optical axis; or The focusing operation is triggered by the user through the focusing interface.

5. The endoscope camera handle according to claim 1 or 2, characterized in that, In the first lens group, the object-side surface of the first lens along the path from the object side to the image side is convex, and the first lens group is used to focus light rays; In the second lens group, the object-side surface of the first lens along the path from the object side to the image side is concave, and the second lens group is used to diverge light rays; The third lens group is used to focus the light.

6. The endoscope camera handle according to claim 1, characterized in that, The first threshold and the second threshold are both 12 mm.

7. The endoscope camera handle according to claim 2, characterized in that, The first threshold and the second threshold are both 8 mm.

8. The endoscope camera handle according to claim 1 or 2, characterized in that, The object distance range corresponding to the focusing lens group is -800mm to +50mm.

Images