Camera shooting handle of endoscope

Abstract

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

Description

Technical Field

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

[0002] Endoscopic equipment is a relatively commonly used medical device. Doctors can use the endoscope camera handle to collect images of lesions in the patient's body and develop the best treatment plan based on them.

[0003] However, due to the limitation of the fluorescent light path design in the dual light path scene of the prior art, the incident angle of the main light on the target surface is small, so the prior art can only use a small target surface to ensure that the size of the camera handle does not increase. However, in the case of imaging on a small target surface, the pixel size after imaging is small, resulting in the inability to clearly image the lesion area.

[0004] Therefore, when using white light and fluorescence to inspect parts, how to ensure clear imaging is an urgent problem to be solved in this field. Summary of the invention

[0005] In order to solve the above-mentioned problems in the prior art, an embodiment of the present application provides an endoscope camera handle, which is used to solve the problem that the prior art cannot meet the requirements of clear dual-light path imaging.

[0006] In a first aspect, an embodiment of the present application provides an endoscope camera handle, the endoscope camera handle comprising an optical adapter and a camera;

[0007] The optical adapter comprises:

[0008] outer cylinder;

[0009] A plurality of lens groups are arranged inside the outer tube and are used to focus or diverge the light returned from the detection part;

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

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

[0012] The camera comprises:

[0013] A light splitting element, used for receiving the light refracted by the optical adapter and splitting the light;

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

[0015] Wherein, the imaging unit includes a white light imaging unit and a fluorescence imaging unit,

[0016] The light splitting element refracts the white light in the light onto the white light imaging unit, and reflects the fluorescence in the light onto the fluorescence imaging unit, a first imaging range of the white light on the white light imaging unit is greater than a first threshold, and a 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 solutions have the following advantages or beneficial effects: the embodiment of the present application can separate the white light and fluorescence in the light through the splitting element and imaging unit in the camera, so that the white light is refracted on the white light imaging unit and the fluorescence is reflected on the fluorescence imaging unit, thereby realizing imaging in a dual-light path scene. Furthermore, based on the structural relationship between the focusing assembly in the optical adapter and the movable lens barrel fixed with the focusing lens group, when the user triggers the focusing operation, the movable lens barrel can be moved by the focusing assembly to realize focusing in the endoscope camera handle. And by combining the multiple lens groups of the embodiment of the present application, the embodiment of the present application can effectively adjust the focal length and improve the quality of the image data collected by the camera handle, thereby ensuring that the endoscope device can clearly image according to the image data collected by the endoscope camera handle.

[0020] In a possible embodiment, the distance between the white light imaging unit and the spectroscopic element is smaller than the distance between the fluorescence imaging unit and the spectroscopic element; for the light returned from each position on the detection site, the white light in the light is refracted by the spectroscopic element to a first position on the white light imaging unit, and the fluorescence in the light is reflected by the spectroscopic element to a second position on the fluorescence imaging unit, and 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.

[0021] The above technical solution has the following advantages or beneficial effects: Since the wavelengths of white light and fluorescence are different, and the refractive indexes of different wavelengths in the same lens are different, the embodiment of the present application is based on the difference between the wavelengths of white light and fluorescence, by setting the distance between the white light imaging unit and the spectroscopic element to be smaller than the distance between the fluorescence imaging unit and the spectroscopic element, so that white light and fluorescence can be clearly imaged at the same time. In addition, based on the multiple lens groups in the embodiment of the present application, the relative position of the first position of the white light refraction in the light on the white light imaging on the white light imaging unit is the same as the relative position of the second position of the fluorescence reflection on the fluorescence imaging unit on the fluorescence imaging unit, thereby ensuring the accurate fusion of the white light image and the fluorescence image, and improving the quality of the fused image.

[0022] In a possible implementation manner, the focusing operation is an operation of a user rotating the outer cylinder along a direction perpendicular to the optical axis; or

[0023] The focusing operation is an operation triggered by a 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 user's operation triggered by the focusing interface, can move the movable lens barrel, thereby realizing the internal focusing process.

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

[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 direction from the object side to the image side is a convex surface, and the first lens group is used for focusing light;

[0027] a second lens group with negative optical power, wherein the object side surface of the first lens in the second lens group along the direction from the object side to the image side is a concave surface, and the second lens group is used for diverging light;

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

[0029] The above technical solution has the following advantages or beneficial effects: since the wavelengths of white light and fluorescence are different, and the refractive indices of different wavelengths in the same lens are different, the embodiment of the present application designs 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 optical path and the fluorescence image corresponding to the fluorescence optical path can be clearly imaged and accurately fused.

[0030] In a possible implementation manner, if the focusing lens group is the first lens group among the multiple lens groups,

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

[0032] 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 surfaces;

[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 a plane, and the image side surface is a convex surface, the object side surface and the image side surface of the fourth cemented lens are both convex surfaces, and the image side surface of the first meniscus lens is a concave surface.

[0034] The above technical solution has the following advantages or beneficial effects: in the case where the focusing lens group is the first lens group, through the above lens structure, while ensuring that the white light image corresponding to the white light path and the fluorescent image corresponding to the fluorescent light path can be clearly imaged and accurately fused, the imaging range is made larger and large target surface imaging is achieved.

[0035] In one possible implementation,

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

[0037] The second cemented lens comprises 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 includes a fourth meniscus lens and a third biconvex lens cemented together.

[0040] The above technical solution has the following advantages or beneficial effects: in the case where the focusing lens group is the first lens group, through the above lens structure, while ensuring that the white light image corresponding to the white light path and the fluorescent image corresponding to the fluorescent light path can be clearly imaged and accurately fused, the imaging range is made larger and large target surface imaging is achieved.

[0041] In a possible implementation manner, if the focusing lens group is the third lens group among the multiple lens groups,

[0042] Then the first lens group is a fifth cemented lens; the object side surface and the image side surface 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 surface and the image side surface of the sixth cemented lens are both concave surfaces, and the object side surfaces of the seventh cemented lens and the eighth cemented lens are both concave surfaces and the image side surfaces are both convex surfaces;

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

[0045] The above technical solution has the following advantages or beneficial effects: in the case where the focusing lens group is the third lens group, through the above lens structure, it is easier to achieve one-touch focusing through a motor while ensuring that the white light image corresponding to the white light path and the fluorescent image corresponding to the fluorescent light path can be clearly imaged and accurately fused.

[0046] In one possible implementation,

[0047] The fifth cemented lens comprises a fourth biconvex lens and a fifth meniscus lens cemented together;

[0048] The sixth cemented lens comprises a third biconcave lens and a sixth meniscus lens cemented together;

[0049] The seventh cemented lens comprises a fourth biconcave lens and a fifth biconvex lens cemented together;

[0050] The eighth cemented lens comprises 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: in the case where the focusing lens group is the third lens group, through the above lens structure, it is easier to achieve one-touch focusing through a motor while ensuring that the white light image corresponding to the white light path and the fluorescent image corresponding to the fluorescent light 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 multiple lens groups, the first threshold and the second threshold are 12 mm respectively;

[0055] If the focusing lens group is the third lens group among the multiple lens groups, the first threshold and the second threshold are respectively 8 mm.

[0056] The above technical solution has the following advantages or beneficial effects: according to 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 a possible implementation manner, the object distance variation range corresponding to the focusing lens group is -800 mm to +50 mm.

[0058] The above technical solution has the following advantages or beneficial effects: the embodiment of the present application can achieve an object distance variation range of -800mm to +50mm through the design of internal focusing, thereby achieving a wide range of focusing.

[0059] In a second aspect, the present application provides an endoscope, comprising a camera handle as described in any one of the first aspects. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0061] Figure 1 A schematic diagram of the structure of an endoscope device provided in an embodiment of the present application;

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

[0063] Figure 3 A schematic diagram of the internal structure of a camera handle provided in an embodiment of the present application;

[0064] Figure 4 A schematic diagram of a plurality of lens groups provided in an embodiment of the present application Figure 1 ;

[0065] Figure 5 A spectroscopic diagram provided in the embodiment of the present application Figure 1 ;

[0066] Figure 6 A schematic diagram of a first lens group provided in an embodiment of the present application located at different positions on the optical axis;

[0067] Figure 7 A schematic diagram of a plurality of lens groups provided in an embodiment of the present application Figure 2 ;

[0068] Figure 8 A spectroscopic diagram provided in the embodiment of the present application Figure 2 ;

[0069] Fig. 9 A schematic diagram of a third lens group provided in an embodiment of the present application located at different positions on the optical axis;

[0070] Fig.10 A schematic diagram of a spectrometer including a spectrometer filter provided in an embodiment of the present application. DETAILED DESCRIPTION

[0071] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Among them, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0072] Furthermore, in the description of the embodiments of the present application, unless otherwise specified, “and” means or. For example, A / B can mean A or B. The “and / or” in the text is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0073] Specifically, in the description of the present application, it needs to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application, and, unless otherwise specified, the "connection" and "connection" mentioned in the present application include direct and indirect connections (connections).

[0074] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0075] Below, some terms in the embodiments of the present application are explained to facilitate understanding by those skilled in the art.

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

[0077] 2. Dual light paths: specifically refers to visible light and fluorescence (infrared light), the two paths of light are imaged and fused simultaneously.

[0078] 3. Internal focusing: refers to the focusing of some optical lenses inside the front and rear lenses of the lens by moving, and the overall position in space is fixed and does not move. Overall movement means that the overall length of the lens remains unchanged, but the focus is adjusted by moving back and forth in space.

[0079] The following is a brief introduction to the design concept of the embodiment of the present application:

[0080] Endoscopic equipment is a relatively commonly used medical device. Doctors can use the endoscope camera handle to collect images of lesions in the patient's body and develop the best treatment plan based on them.

[0081] However, due to the limitation of the fluorescent light path design in the dual light path scene of the prior art, the incident angle of the main light on the target surface is small, so the prior art can only use a small target surface to ensure that the size of the camera handle does not increase. However, in the case of imaging on a small target surface, the pixel size after imaging is small, resulting in the inability to clearly image the lesion area.

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

[0083] To solve the above problems, the endoscope camera handle of the embodiment of the present application includes an optical adapter and a camera;

[0084] Optical adapter, including:

[0085] outer cylinder;

[0086] A plurality of lens groups are arranged inside the outer tube and are used to focus or diverge the light returned from the detection part;

[0087] A movable lens barrel is arranged outside a focus lens group among the plurality of lens groups, and the focus lens group is fixed inside the movable lens barrel;

[0088] A focusing assembly is fixedly connected to the outer side of the movable lens barrel; when a user triggers a focusing operation, the focusing assembly is used to move the movable lens barrel along the optical axis;

[0089] Camera, including:

[0090] A light splitting element, used for receiving the light refracted by the optical adapter and splitting the light;

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

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

[0093] The light splitting element refracts the white light in the light onto the white light imaging unit, and reflects the fluorescence in the light onto the fluorescence imaging unit, wherein a first imaging range of the white light on the white light imaging unit is greater than a first threshold, and a second imaging range of the fluorescence on the fluorescence imaging unit is greater than a second threshold;

[0094] A white light imaging unit, used to convert the received white light into a first electrical signal and output the first electrical signal;

[0095] The 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 embodiment of the present application, the application scenario set in the present application is briefly described below. It should be noted that the following scenario is only used to illustrate the embodiment of the present application and is not limited. In the specific implementation, the technical solution provided by the embodiment of the present application can be flexibly applied according to actual needs.

[0097] Figure 1 A structural schematic diagram of an endoscope device in an embodiment of the present application is exemplarily shown, wherein the endoscope device includes a cold light source, a camera assembly and a display.

[0098] The camera assembly can be used to take pictures of endoscopic examinations and surgeries to collect image data of the examinations and surgeries; its key components may include one or more of a camera, a button, a camera host, a CMOS (Complementary Metal-Oxide-Semiconductor) image sensor, a video cable, an optical adapter, an objective lens field of view, a mirror rod, a communication port, and a video output interface. The camera host can be connected to a display through a video output interface, and connected to a cold light source host through a communication port.

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

[0100] The display can be used to display the endoscopic image collected and generated by the camera assembly.

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

[0102] It should be understood that Figure 1 The schematic diagram of the structure of the endoscope device shown is only an example, and the endoscope device may have more Figure 1The more or less components shown in the figure can be combined with two or more components, or 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] Many different implementations or examples are provided above to implement different structures of the present application. In order to simplify the content of the embodiments of the present application, only the components and settings of specific examples are described above. Of course, they are only examples, and the purpose is not to limit the present application.

[0104] During the implementation, the operator holds the endoscope camera handle, points the endoscope's bayonet toward the inspection site, and maintains a certain distance from the object. Figure 2 shown.

[0105] It should be noted that Figure 2 The camera handles in the figure are only examples. The camera handles actually used are not limited to Figure 2 Camera handle shown.

[0106] The embodiment of the present application provides an endoscope camera handle, which includes an optical adapter and a camera head. The optical adapter includes: an outer barrel, a plurality of lens groups, a movable lens barrel and a focusing assembly. The camera head includes: a light splitting element and an imaging unit, and the imaging unit includes a white light imaging unit and a fluorescence imaging unit.

[0107] Among them, the outer tube of the embodiment of the present application is located at the outermost side of the adapter in the camera handle; multiple lens groups are arranged inside the outer tube, and are used to focus or diverge the light returned from the detection part; the moving lens barrel is arranged outside the focusing lens group among the multiple lens groups, and the focusing lens group is fixed on the inside of the moving lens barrel; the focusing assembly is fixedly connected to the outer side 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.

[0108] Optionally, the focusing assembly in the embodiment of the present application may be a guide pin in a cam mechanism. The cam mechanism further includes a middle lens barrel, which is located inside the outer barrel and outside the movable lens barrel, and the middle lens barrel has a guide groove with a cam curve, the guide groove faces the movable lens barrel, and the guide pin fixed on the outer side of the movable 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, driving the guide pin to move in the guide groove on the middle lens barrel, thereby driving the movable 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 tube on the optical axis remains unchanged, but the relative position between the moving lens tube and the outer tube changes.

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

[0111] In the embodiment of the present application, when the user rotates the outer barrel, the middle barrel is driven to rotate in a direction perpendicular to the optical axis, and the middle barrel drives the guide pin to move in the guide groove on the middle barrel, thereby driving the movable barrel to move along the optical axis.

[0112] The focus interface in the embodiment of the present application can be a physical button set on the outside of the camera handle, or it can be a focus control on the external display screen of the camera handle, and the present application does not impose any restrictions on this.

[0113] Optionally, the embodiment of the present application may further include a motor. After the user triggers a focusing operation through the focusing interface, the motor drives the focusing assembly to move, thereby driving the movable lens barrel to move along the optical axis.

[0114] Exemplarily, 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, drives the guide pin to move in the guide groove on the middle lens barrel, and thus drives the movable lens barrel to move along the optical axis.

[0115] During implementation, taking a physical button as an example, the user triggers the focusing operation by pressing the physical button, and the motor drives the focusing assembly to move, thereby driving the moving lens barrel to move along the optical axis, thereby achieving one-button focusing.

[0116] Among them, the spectroscopic element of the embodiment of the present application is used to receive the light refracted by the optical adapter and to split the light; the imaging unit is used to convert the received split light into electrical signals and output them.

[0117] In the embodiment of the present application, the spectroscopic element refracts the white light in the light onto the white light imaging unit, and reflects the fluorescence in the light onto the fluorescence imaging unit. The first imaging range of the white light on the white light imaging unit is greater than the first threshold, and the second imaging range of the fluorescence on the fluorescence imaging unit is greater than the 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.

[0118] Optionally, the beam splitting element in the embodiment of the present application may be any one of a beam splitting prism, a beam splitting filter, and a polarization beam splitting prism, and the present application does not impose any limitation on this.

[0119] Among them, by using a spectroscopic filter, the optical path can be shortened and the cost can be reduced while realizing the spectroscopic function. When the illumination light path is polarized light illumination, or polarized light is incident on the camera system, different spectroscopic effects can be obtained by using a polarization spectroscopic prism.

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

[0121] Among them, 4K means the sensor resolution is 3840*2160.

[0122] It should be noted that the embodiment of the present application uses a 4K sensor and combines the design of the camera handle of the embodiment of the present application to achieve 4K imaging effects in the white light imaging unit and the fluorescent imaging unit.

[0123] The white light imaging unit and the fluorescence imaging unit in the embodiment of the present application are respectively located at different positions of the light splitting element, and are respectively arranged at a distance of 1-3 mm from the light splitting element.

[0124] In the embodiment of the present application, the distance between the white light imaging unit and the spectroscopic element is smaller than the distance between the fluorescent imaging unit and the spectroscopic element. Since the wavelengths of white light and fluorescent light are different, the refractive index in the lens is different. In addition to overcoming the problem of different wavelengths of white light and fluorescent light through lens design, the embodiment of the present application also achieves clear imaging of white light on the white light imaging unit and fluorescent light on the fluorescent imaging unit by setting the positions of the white light imaging unit and the fluorescent light imaging unit respectively between the wind light unit, that is, achieving clear imaging of white light and fluorescent light at the same time.

[0125] In implementation, for the light returned from each position on the detection part, the white light in the light is refracted by the spectroscopic element at the first position on the white light imaging unit, and the fluorescence in the light is reflected by the spectroscopic element at the second position on the fluorescence imaging unit, and 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, so that the accurate fusion of the white light image and the fluorescence image can be achieved.

[0126] In the embodiment of the present application, an adapter including three lens groups is taken as an example, and the first lens group on the object side is taken as a focusing lens group as an example, and a schematic diagram of the structure of a camera handle is provided, such as Figure 3 As shown, the cross-sectional view of the camera handle is used for illustration. The endoscope camera handle includes an optical adapter 10 and a camera head 20. The optical adapter includes: an outer barrel 11, a focusing assembly 12, a movable lens barrel 13, and a first lens group 031, a second lens group 032, and a third lens group 033 in a plurality of lens groups 03. The camera head 20 includes: a beam splitter 21 and an imaging unit 22, and the imaging unit includes a white light imaging unit 221 and a fluorescence imaging unit 222.

[0127] With respect to the multiple lens groups in the embodiment of the present application, each lens group includes at least two lenses, and the multiple lens groups include, in sequence from the object side to the image side along the optical axis:

[0128] a first lens group with positive optical power, wherein the object side surface of the first lens in the first lens group along the direction from the object side to the image side is a convex surface, and the first lens group is used for focusing light;

[0129] a second lens group with negative optical power, wherein the object side surface of the first lens in the second lens group along the direction from the object side to the image side is a concave surface, and the second lens group is used for diverging light;

[0130] The third lens group has positive optical power and is used for focusing the light.

[0131] The adapter in the embodiment of the present application may further include a protective glass, and the protective glass is located on the object side of the first lens group.

[0132] Optionally, the focusing lens may be any one of a plurality of lens groups.

[0133] In an 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 the object side surface and the image side surface of the second cemented lens are both 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 a plane, and the image side surface is convex, the object side surface and the image side surface of the fourth cemented lens are both convex, and the image side surface of the first meniscus lens is concave.

[0134] Among them, 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.

[0135] like Figure 4 As shown, a schematic diagram of a structure of multiple lens groups in an embodiment of the present application is shown in FIG. Figure 1. Among 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 required by the structure, for example >2 mm.

[0137] against Figure 4 The lens structure shown in the figure is a schematic diagram of a light splitting embodiment of the present application. Figure 1 ,like Figure 5 As shown. Among them, Figure 5 Take a beam splitter as an example.

[0138] against Figure 5 , when the first lens group is moved, the present application provides a schematic diagram of the first lens group being located at different positions on the optical axis, such as Figure 6 If the first lens group is located at the position closest to the image side in the inner adjustment range, then Figure 6 As shown in case a; if the first lens group is located in the middle position of the inner adjustment range, then Figure 6 As shown in case b; if the first lens group is located at the position closest to the object side in the inner adjustment range, then Figure 6 As shown in situation c.

[0139] For example, Figure 6 As shown, the position closest to the image side in the inner adjustment range is the position where the distance 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 is 0.94 mm. The middle position in the inner adjustment range is the position where the distance 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 is 2 mm. The position closest to the object side in the inner adjustment range is the position where the distance 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 is 4.6 mm.

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

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

[0142] By using the front-group intra-focus method, that is, focusing by moving the first lens group, the optical design volume can be simplified (the length is reduced by 25%), making the optical adapter smaller. When the target area is doubled and the single pixel area is increased by more than 1 times, it is convenient for operators to observe the lesion site and facilitate operation, fully improving the received light energy, reducing noise and improving image quality.

[0143] In the front-group intra-focusing method, this optical path design takes visible light + fluorescence into consideration at the same time, and the dual optical paths are optimized at the same time. The shared lens part is used to separate the two lights through a beam splitter. Through design optimization, the optical path difference between the two optical paths is compensated at the back end to achieve simultaneous clarity of the two-path imaging, simultaneous focusing of visible light + fluorescence, and real-time fusion of the visible light + fluorescence dual optical paths.

[0144] In an optional embodiment, if the focusing lens group is the third lens group among the multiple lens groups, the first lens group is the fifth cemented lens; the object side surface and the image side surface of the fifth cemented lens are both convex surfaces; the second lens group includes the sixth cemented lens, the seventh cemented lens and the eighth cemented lens; the object side surface and the image side surface of the sixth cemented lens are both concave surfaces, and the object side surfaces of the seventh cemented lens and the eighth cemented lens are both concave surfaces, and the image side surfaces are both convex surfaces; the third lens group is the ninth cemented lens; the object side surface and the image side surface of the ninth cemented lens are both convex surfaces.

[0145] Among them, 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.

[0146] like Figure 7 As shown, a schematic diagram of a structure of multiple lens groups in an embodiment of the present application is shown in FIG. Figure 2. Among 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 moving lens barrel.

[0148] against Figure 7 The lens structure shown in the figure is a schematic diagram of a light splitting embodiment of the present 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 , when the third lens group is moved, the present application provides a schematic diagram of the third lens group being located at different positions on the optical axis, such as Fig. 9 If the third lens group is located at the position closest to the image side in the inner adjustment range, then Fig. 9 As shown in case a; if the third lens group is located in the middle position of the inner adjustment range, then Fig. 9 As shown in case b; if the third lens group is located at the position closest to the object side in the inner adjustment range, then Fig. 9 As shown in situation c.

[0150] For example, Fig. 9 As shown, the position closest to the image side in the inner 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 in the inner 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 in the inner 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, the embodiment of the present application can also take a spectroscopic filter as an example. Fig.10 As shown, a spectroscopic diagram including a spectroscopic filter is provided in an embodiment of the present application.

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

[0153] In the embodiment of the present application, the first threshold and the second threshold are the diameter thresholds of the light in the imaging unit area. 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 internal focusing solution, that is, the internal focusing is achieved by moving the third lens group. Compared with the overall focusing solution in the prior art, the adapter has a simple optical path design, the motor controls the last group of lenses, the structure is easy to place, the circuit is easy to connect, and it is easier to achieve autofocus or one-key focusing functions. In the solution, the last group of lenses is moved for focusing, which makes the camera smaller in size, provides more space for components such as motors, is light in weight, and easily meets the load requirements of the motor, thereby achieving one-key focusing or autofocus functions.

[0155] In the rear-group focusing solution, this optical path design takes visible light + fluorescence into consideration at the same time, and the dual optical paths are optimized at the same time. The shared lens part is used to separate the two lights through a beam splitter. Through design optimization, the optical path difference between the two optical paths is compensated at the back end to achieve simultaneous clarity of the two-path imaging, simultaneous focusing of visible light + fluorescence, and real-time fusion of the visible light + fluorescence dual optical paths.

[0156] It should be noted that, in the embodiment of the present application, only the focusing lens group is moved during internal focusing, and the positions of other lens groups on the optical axis are fixed.

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

[0158] In an embodiment of the present application, the endoscope device also includes a camera host, and the camera handle transmits the first electrical signal and the second electrical signal to the camera host, so that the camera host obtains 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 appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0160] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0161] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0162] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0163] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these 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 comprises: outer cylinder; A plurality of lens groups are arranged inside the outer tube and are used to focus or diverge the light returned from the detection part; A movable lens barrel is arranged outside a focus lens group among the plurality of lens groups, and the focus 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 a user triggers a focusing operation, the focusing assembly is used to move the movable lens barrel along the optical axis; The camera comprises: A light splitting element, used for receiving the light refracted by the optical adapter and splitting the light; An imaging unit, used to convert the received split light into electrical signals and output them; Wherein, the imaging unit includes a white light imaging unit and a fluorescence imaging unit, The light splitting element refracts the white light in the light onto the white light imaging unit, and reflects the fluorescence in the light onto the fluorescence imaging unit, a first imaging range of the white light on the white light imaging unit is greater than a first threshold, and a 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. The endoscope camera handle according to claim 1, characterized in that: The distance between the white light imaging unit and the spectroscopic element is smaller than the distance between the fluorescence imaging unit and the spectroscopic element; for the light returned from each position on the detection part, the white light in the light is refracted by the spectroscopic element at a first position on the white light imaging unit, and the fluorescence in the light is reflected by the spectroscopic element at a second position on the fluorescence imaging unit, and 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.

3. The endoscope camera handle according to claim 1, characterized in that: The focusing operation is an operation in which a user rotates the outer cylinder in a direction perpendicular to the optical axis; or The focusing operation is an operation triggered by a user through the focusing interface.

4. The endoscope camera handle according to claim 1, characterized in that: Each lens group includes at least two lenses, and the plurality of lens groups include, in sequence from the object side to the image side along the optical axis: a first lens group with positive optical power, wherein the object side surface of the first lens in the first lens group along the direction from the object side to the image side is a convex surface, and the first lens group is used for focusing light; a second lens group with negative optical power, wherein the object side surface of the first lens in the second lens group along the direction from the object side to the image side is a concave surface, and the second lens group is used for diverging light; A third lens group with positive optical power is used to focus the light.

5. The endoscope camera handle according to claim 4, characterized in that: If the focusing lens group is the first lens group among the multiple lens groups, Then the first lens group includes a first biconvex lens and a first cemented lens; the object side surface of the first cemented lens is a convex surface, and the image side surface is a concave surface; 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 surfaces; 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 a plane, and the image side surface is a convex surface, the object side surface and the image side surface of the fourth cemented lens are both convex surfaces, and the image side surface of the first meniscus lens is a concave surface.

6. The endoscope camera handle according to claim 5, characterized in that: The first cemented lens comprises a second biconvex lens and a first biconcave lens cemented together; The second cemented lens comprises a second meniscus lens and a second biconcave lens cemented together; The third cemented lens comprises 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.

7. The endoscope camera handle according to claim 4, characterized in that: If the focusing lens group is the third lens group among the multiple lens groups, Then the first lens group is a fifth cemented lens; the object side surface and the image side surface of the fifth cemented lens are both convex surfaces; The second lens group includes a sixth cemented lens, a seventh cemented lens and an eighth cemented lens; the object side surface and the image side surface of the sixth cemented lens are both concave surfaces, and the object side surfaces of the seventh cemented lens and the eighth cemented lens are both concave surfaces and the image side surfaces are both convex surfaces; The third lens group is a ninth cemented lens; the object side surface and the image side surface of the ninth cemented lens are both convex surfaces.

8. The endoscope camera handle according to claim 7, characterized in that: The fifth cemented lens comprises a fourth biconvex lens and a fifth meniscus lens cemented together; The sixth cemented lens comprises a third biconcave lens and a sixth meniscus lens cemented together; The seventh cemented lens comprises a fourth biconcave lens and a fifth biconvex lens cemented together; The eighth cemented lens comprises 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.

9. The endoscope camera handle according to any one of claims 4 to 8, characterized in that: If the focusing lens group is the first lens group among the multiple lens groups, the first threshold and the second threshold are 12 mm respectively; If the focusing lens group is the third lens group among the multiple lens groups, the first threshold and the second threshold are respectively 8 mm.

10. The endoscope camera handle according to any one of claims 1 to 8, characterized in that: The object distance variation range corresponding to the focusing lens group is from -800mm to +50mm.

Images