A binocular lens and a surgical device

Abstract

The application relates to a binocular lens and a surgical device. The binocular lens comprises a first lens group and two optical paths which are the same in structure and are symmetrically distributed at the center of the binocular lens; each of the two optical paths comprises, from the object side to the image side, a second lens group, a third lens group and an imaging mirror group which are sequentially arranged; after reflected light on the object side enters the first lens group, the reflected light enters the two optical paths respectively and is imaged at the imaging mirror group in each optical path; the focal length of the binocular lens and the total optical length of the binocular lens satisfy the following relationship: f / TTL < 1, wherein f is the total focal length of the binocular lens, and TTL is the total optical length of the binocular lens. The method can solve the problem that the existing binocular zoom lens cannot realize binocular convergence.

Description

Technical Field

[0001] This application relates to the field of optical technology, and in particular to a binocular lens and a surgical device. Background Technology

[0002] With the development of optical technology, it has been widely applied in the medical field. For example, optical technology can be used in external surgical devices such as craniotomy equipment or spinal surgery equipment. As the demand for optical technology in external surgical devices increases, the supporting equipment for optical lenses is also becoming increasingly complex. In order to better perceive depth information and accurately locate lesions, the requirements for optical lenses in external surgical devices are evolving from monocular and fixed-focus to binocular and zoom lenses.

[0003] Existing binocular zoom lenses mainly use two optical paths with identical structures and centrally symmetrical distribution. The light from each optical path is emitted after passing through a lens with the same structure. Therefore, the emitted light is two parallel light beams, which cannot achieve binocular convergence.

[0004] There is currently no effective solution to the problem that existing binocular zoom lenses cannot achieve binocular convergence. Summary of the Invention

[0005] Therefore, it is necessary to provide a binocular lens and a surgical device to address the aforementioned technical problems.

[0006] In a first aspect, this application provides a binocular lens, including a first lens group and two optical paths with identical structures and symmetrically distributed around the center of the binocular lens;

[0007] Each of the two optical paths includes a second lens group, a third lens group, and an imaging lens group arranged sequentially from the object side to the image side;

[0008] The reflected light from the object side enters the first lens group and then enters the two optical paths respectively, forming an image at the imaging lens group in each optical path.

[0009] The focal length of the binocular lens and the total optical length of the binocular lens satisfy the following relationship:

[0010]

[0011] Where f is the total focal length of the binocular lens, and TTL is the total optical length of the binocular lens.

[0012] In one embodiment, the first lens group is provided with a first lens, a second lens, a third lens and a fourth lens in sequence along the incident direction of light;

[0013] The second lens group includes a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens, an eleventh lens, and a twelfth lens arranged sequentially along the incident direction of light.

[0014] The third lens group includes a thirteenth lens, a fourteenth lens, and a fifteenth lens arranged sequentially along the incident direction of light.

[0015] The first lens, the fourth lens, the fifth lens, and the twelfth lens are meniscus lenses with negative optical power; the third lens, the eighth lens, the ninth lens, and the eleventh lens are meniscus lenses with positive optical power; the second lens, the sixth lens, and the fifteenth lens are biconvex lenses with positive optical power; the seventh lens, the tenth lens, and the fourteenth lens are biconcave lenses with negative optical power; and the thirteenth lens is a plano-convex lens with positive optical power.

[0016] In one embodiment, the first lens and the second lens are closely joined to form a first cemented lens group; the third lens and the fourth lens are closely joined to form a second cemented lens group; the fifth lens and the sixth lens are closely joined to form a third cemented lens group; the seventh lens and the eighth lens are closely joined to form a fourth cemented lens group; the ninth lens and the tenth lens are closely joined to form a fifth cemented lens group; and the eleventh lens and the twelfth lens are closely joined to form a sixth cemented lens group.

[0017] In one embodiment, the third cemented lens, the fourth cemented lens, the fifth cemented lens, and the sixth cemented lens satisfy the following relationship:

[0018]

[0019] Wherein, FOV is the field of view of the binocular lens, f G1 f is the focal length of the first lens group. D3 The focal length and f of the third cemented lens group are... D4 The focal length and f of the fourth cemented lens group are... D5 The focal length and f of the fifth cemented lens group are... D6 The focal length is the sixth cemented lens group.

[0020] In one embodiment, the third lens has a concave surface on the object side and a convex surface on the image side; and the second lens and the third lens satisfy the following relationship:

[0021]

[0022] Wherein, R3 is the center radius of curvature of the third lens near the object side, and R2 is the center radius of curvature of the second lens near the image side.

[0023] In one embodiment, the third lens, the eighth lens, and the thirteenth lens satisfy the following condition:

[0024] f3≥128;

[0025] f8≥18;

[0026] f 13 ≥13;

[0027] Where f3 is the focal length of the third lens, f8 is the focal length of the eighth lens, and f 13 The focal length of the thirteenth lens is given.

[0028] In one embodiment, the tenth lens and the twelfth lens satisfy the following condition:

[0029] Vd 10 ≥28.1;

[0030] Vd 12 ≥33.0;

[0031] Among them, Vd 10 Vd is the Abbe number of the glass material of the tenth lens. 12 The Abbe number is the glass material of the twelfth lens.

[0032] In one embodiment, the fourth lens, the seventh lens, and the thirteenth lens satisfy the following condition:

[0033] Nd4≥1.61;

[0034] Nd7 ≥ 1.58;

[0035] Nd 13 ≥1.50;

[0036] Wherein, Nd4 is the refractive index of the glass material of the fourth lens, Nd7 is the refractive index of the glass material of the seventh lens, and Nd 13 The refractive index is the glass material of the thirteenth lens.

[0037] In one embodiment, the second lens group and the third lens group constitute a rear-end zoom system, and the optical axis offset between the rear-end zoom system and the first lens group is within the range of [-10mm, 10mm].

[0038] In one embodiment, it further includes:

[0039] An aperture stop is provided between the second lens group and the third lens group.

[0040] In one embodiment, a flat glass group and a color filter group are arranged sequentially after the third lens group and before the imaging lens group, along the direction of light incidence.

[0041] In one embodiment, a prism group and a color filter group are arranged sequentially after the third lens group and before the imaging lens group, along the direction of light incidence.

[0042] In one embodiment, a reflective component is also included;

[0043] The reflective component is located between the second lens group and the third lens group.

[0044] Secondly, this application also provides a surgical device. The surgical device includes a movable trolley;

[0045] The mobile trolley is equipped with a monitor, a control touch screen, and a support arm;

[0046] The end of the support arm is connected to the binocular lens described in the first aspect above; the binocular lens moves with the end of the support arm;

[0047] The monitor is used to display the imaging data of the binocular lens;

[0048] The control touchscreen generates control commands in response to the user's touch operation to control the movement of the arm.

[0049] The aforementioned binocular lens and surgical device include a first lens group and two identical optical paths symmetrically distributed around the center of the lens. Each optical path includes a second lens group, a third lens group, and an imaging lens group arranged sequentially from the object side to the image side. Reflected light from the object side enters the first lens group and then enters each of the two optical paths, forming an image at the imaging lens group of each path. The first lens group (common objective lens) enables convergence of the two optical paths, while the second and third lens groups are used for zooming. This allows for high-resolution imaging of the binocular lens while simultaneously achieving binocular convergence and a wide field of view. Its optical path design enables light convergence at the target plane, point, or block within the effective working distance, not just at a fixed distance, and provides clear imaging to the optimal position while achieving light convergence. This solves the problem of existing binocular zoom lenses being unable to achieve binocular convergence.

[0050] Details of one or more embodiments of this application are set forth in the following drawings and description to make other features, objects and advantages of this application more readily apparent. Attached Figure Description

[0051] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0052] Figure 1 This is a structural block diagram of a binocular lens provided in an embodiment of this application;

[0053] Figure 2 This is a schematic diagram of the structure of a binocular lens provided in Embodiment 1 of this application;

[0054] Figure 3 This is a schematic diagram of the structure of the binocular lens provided in Embodiment 2 of this application;

[0055] Figure 4 This is a schematic diagram of the structure of the binocular lens provided in Embodiment 3 of this application;

[0056] Figure 5A This is a structural schematic diagram of the wide-angle state of the binocular lens provided in Embodiment 4 of this application;

[0057] Figure 5B This is a structural schematic diagram of the telephoto state of the binocular lens provided in Embodiment 4 of this application;

[0058] Figure 6 This is a schematic diagram of the structure of the binocular lens provided in Embodiment 5 of this application;

[0059] Figure 7A A schematic diagram of the optical transfer function of a binocular lens at the wide-angle end, provided in an embodiment of this application;

[0060] Figure 7B A schematic diagram of the optical transfer function of a binocular lens at the telephoto end provided in an embodiment of this application;

[0061] Figure 8A A schematic diagram of field curvature at the wide-angle end of a binocular lens provided in an embodiment of this application;

[0062] Figure 8B A schematic diagram of distortion at the wide-angle end of a binocular lens provided in an embodiment of this application;

[0063] Figure 8C A schematic diagram of field curvature at the telephoto end of a binocular lens provided in an embodiment of this application;

[0064] Figure 8D A schematic diagram of distortion at the telephoto end of a binocular lens provided in an embodiment of this application;

[0065] Figure 9A A schematic diagram of the lateral light fan of a binocular lens in the first field of view, provided in an embodiment of this application;

[0066] Figure 9B A schematic diagram of the lateral light fan of a binocular lens in the second frontal field of view, provided in an embodiment of this application;

[0067] Figure 9C A schematic diagram of the lateral light fan of a binocular lens in a third frontal field of view, provided in an embodiment of this application;

[0068] Figure 9D A schematic diagram of the lateral light fan of a binocular lens in the second negative field of view, provided in an embodiment of this application;

[0069] Figure 9E A schematic diagram of the lateral light fan of a binocular lens in the third negative field of view, provided in an embodiment of this application;

[0070] Figure 10 This is a schematic diagram of the structure of a surgical device provided in one embodiment of this application. Detailed Implementation

[0071] To better understand the purpose, technical solution, and advantages of this application, the application is described and illustrated below in conjunction with the accompanying drawings and embodiments.

[0072] Unless otherwise defined, the technical or scientific terms used in this application shall have the general meaning as understood by one of ordinary skill in the art to which this application pertains. Words such as “a,” “an,” “an,” “the,” “the,” and “these,” used in this application, do not indicate quantitative limitation and may be singular or plural. The terms “comprising,” “including,” “having,” and any variations thereof used in this application are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that comprises a series of steps or modules (units) is not limited to the listed steps or modules (units) but may include steps or modules (units) not listed, or may include other steps or modules (units) inherent to such processes, methods, products, or devices. The terms “connected,” “linked,” and “coupled,” used in this application, are not limited to physical or mechanical connections but may include electrical connections, whether direct or indirect. The term “multiple” used in this application refers to two or more. The "and / or" operator describes the relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can represent three cases: A alone, A and B simultaneously, and B alone. Typically, the character " / " indicates that the objects before and after it are in an "or" relationship. The terms "first," "second," and "third," etc., used in this application are merely for distinguishing similar objects and do not represent a specific ordering of the objects.

[0073] This embodiment provides a binocular lens. Figure 1This is a structural block diagram of a binocular lens according to this embodiment. Figure 1 As shown, the binocular lens includes a first lens group 110 and two optical paths with identical structures and symmetrically distributed around the center of the binocular lens; each of the two optical paths includes a second lens group 120, a third lens group 130 and an imaging lens group 140 arranged sequentially from the object side to the image side; after the reflected light from the object side enters the first lens group 110, it enters the two optical paths respectively and forms an image at the imaging lens group 140 of each optical path.

[0074] The first lens group 110, the second lens group 120, and the third lens group 130 are each composed of multiple lenses. The imaging lens group 140 may be composed of one or more imaging mirrors.

[0075] In this embodiment, the first lens group 110, as the front common objective lens of the binocular lens, can realize the dual-path convergence function of light. The second lens group 120 and the third lens group 130 can serve as a zoom system, which can zoom the binocular lens by adjusting the focal length, thickness, etc. of the lenses in the second lens group 120 and the third lens group 130. This enables high-resolution imaging of the binocular lens while simultaneously achieving binocular convergence and observation over a wide field of view.

[0076] The focal length of a binocular lens and its total optical length satisfy the following relationship:

[0077]

[0078] Where f is the total focal length of the binocular lens, and TTL is the total optical length of the binocular lens.

[0079] The total optical length of the aforementioned binocular lens is the distance between the first lens (first lens) of the first lens group 110 and the last lens of the imaging lens group 140.

[0080] This embodiment utilizes a first lens group (common objective lens) to achieve dual-path convergence, and a second and third lens group for zooming, enabling high-resolution imaging of the binocular lens while simultaneously achieving binocular convergence and a wide field of view. Its optical path design allows for light convergence at the target plane, point, or block within the effective working distance, not just at a fixed distance, and ensures clear imaging of the optimal position while achieving light convergence. Furthermore, clear imaging is also guaranteed when light is incident at a certain angle (±2°).

[0081] in, Figure 2 This is a schematic diagram of the structure of the binocular lens provided in Embodiment 1 of this application. Figure 2As shown, the first lens group 110 has a first lens L1, a second lens L2, a third lens L3, and a fourth lens L4 arranged sequentially along the direction of light incidence; the second lens group 120 has a fifth lens L5, a sixth lens L6, a seventh lens L7, an eighth lens L8, a ninth lens L9, a tenth lens L10, an eleventh lens L11, and a twelfth lens L12 arranged sequentially along the direction of light incidence; and the third lens group 130 has a thirteenth lens L13 and a fourteenth lens L14 arranged sequentially along the direction of light incidence. The fifteenth lens L15; the first lens L1, the fourth lens L4, the fifth lens L5 and the twelfth lens L12 are meniscus lenses with negative optical power; the third lens L3, the eighth lens L8, the ninth lens L9 and the eleventh lens L11 are meniscus lenses with positive optical power; the second lens L2, the sixth lens L6 and the fifteenth lens L15 are biconvex lenses with positive optical power; the seventh lens L7, the tenth lens L10 and the fourteenth lens L14 are biconcave lenses with negative optical power; and the thirteenth lens L13 is a plano-convex lens with positive optical power.

[0082] Specifically, in one embodiment, see further... Figure 2 The first and second lenses are joined together to form the first cemented lens group; the third and fourth lenses are joined together to form the second cemented lens group; the fifth lens L5 and the sixth lens L6 are joined together to form the third cemented lens group; the seventh lens L7 and the eighth lens L8 are joined together to form the fourth cemented lens group; the ninth lens L9 and the tenth lens L10 are joined together to form the fifth cemented lens group; and the eleventh lens L11 and the twelfth lens L12 are joined together to form the sixth cemented lens group.

[0083] In another embodiment, the third cemented lens, the fourth cemented lens, the fifth cemented lens, and the sixth cemented lens satisfy the following relationship:

[0084]

[0085] Where FOV is the field of view of the binocular lens, f G1 f is the focal length of the first lens group 110. D3 The focal length and f of the third cemented lens group. D4 The focal length and f of the fourth cemented lens group. D5 The focal length and f of the fifth cemented lens. D6 This is the focal length of the sixth cemented lens group.

[0086] In one embodiment, the third lens L3 has a concave surface on the object side and a convex surface on the image side; and the second lens L2 and the third lens L3 satisfy the following relationship:

[0087]

[0088] Wherein, R3 is the central radius of curvature of the third lens L3 near the object side, and R2 is the central radius of curvature of the second lens L2 near the image side.

[0089] In another embodiment, the third lens L3, the eighth lens L8, and the thirteenth lens L13 satisfy the following condition:

[0090] f3≥128;

[0091] f8≥18;

[0092] f 13 ≥13;

[0093] Where f3 is the focal length of the third lens L3, f8 is the focal length of the eighth lens L8, and f 13 This is the focal length of the thirteenth lens, L13.

[0094] It should be noted that the focal length in this embodiment is in mm.

[0095] Furthermore, in one embodiment, the tenth lens L10 and the twelfth lens L12 satisfy the following condition:

[0096] Vd 10 ≥28.1;

[0097] Vd 12 ≥33.0;

[0098] Among them, Vd 10 The Abbe number of the glass material of the tenth lens L10, Vd 12 The Abbe number is the glass material of the twelfth lens L12.

[0099] Specifically, in one embodiment, the fourth lens L4, the seventh lens L7, and the thirteenth lens L13 satisfy the following conditions:

[0100] Nd4≥1.61;

[0101] Nd7 ≥ 1.58;

[0102] Nd 13 ≥1.50;

[0103] Where Nd4 is the refractive index of the glass material of the fourth lens L4, and Nd7 is the refractive index of the glass material of the seventh lens L7. 13 The refractive index is the glass material of the thirteenth lens, L13.

[0104] Furthermore, in one embodiment, the rear zoom system constituted by the second lens group 120 and the third lens group 130 has an optical axis misalignment range of [-10mm, 10mm] between the rear zoom system and the first lens group 110.

[0105] In addition, the binocular lens provided in Embodiment 2 of this application is based on Embodiment 1 of this application, with the addition of an aperture stop. Figure 3 This is a schematic diagram of the structure of the binocular lens provided in Embodiment 2 of this application. Figure 3 As shown, an aperture stop 180 is provided between the second lens group 120 and the third lens group 130.

[0106] Furthermore, the binocular lens provided in Embodiment 3 of this application is based on Embodiment 2 of this application, with the addition of a flat glass group and a color filter group. Figure 4 This is a schematic diagram of the binocular lens provided in Embodiment 3 of this application. Figure 4 As shown, along the direction of light incidence, after the third lens group and before the imaging lens group 140, the flat glass group 150 and the color filter group 160 are arranged in sequence.

[0107] The aforementioned flat glass assembly may include one or more flat glass panels. The aforementioned color filter assembly may include one or more color filters.

[0108] In addition, based on the binocular lens of Embodiment 3 of this application, a prism can be used to replace the flat glass in order to achieve the effect of beam splitting. Figure 5A and Figure 5B This is a schematic diagram of the structure of the binocular lens in different states provided in Embodiment 4 of this application. Figure 5A This is a schematic diagram of the wide-angle state of the binocular lens provided in Embodiment 4 of this application; Figure 5B This is a structural schematic diagram of the telephoto state of the binocular lens provided in Embodiment 4 of this application. Figure 5A and Figure 5B As shown, along the direction of light incidence, after the third lens group 130 and before the imaging lens group 140, the prism group 170 and the color filter group 160 are arranged in sequence.

[0109] Preferably, in one embodiment, the binocular lens further includes a reflector assembly located between the second lens group 120 and the third lens group 130.

[0110] The aforementioned reflective assembly may include one or more mirrors, which are used to reflect light and thus change the optical path. Alternatively, the reflective assembly may also be a reflector or a beam splitter; this embodiment does not impose specific limitations, as long as the reflective assembly can change the optical path as needed. This embodiment achieves a change in the optical path of the binocular lens by setting a reflective assembly. It should be noted that when the optical path changes, it is no longer a straight line; therefore, the total optical length of the binocular lens is the length of the light propagation distance between the first lens (first lens L1) of the first lens group 110 and the imaging mirror surface.

[0111] Figure 6 This is a schematic diagram of the structure of the binocular lens provided in Embodiment 5 of this application, as shown below. Figure 6 As shown, a reflective assembly 190 is disposed between the second lens group 120 and the third lens group 130. The reflective assembly includes a first reflector 192, a second reflector 194, a third reflector 196, and a fourth reflector 198. (Continue to see...) Figure 6 The prism assembly 170 can split the received light into two paths. In this embodiment, the rear end of the lens design can be equipped with a reflective component, which can expand the dual-path space and shorten the overall size. It can also enable multi-image observation and multi-angle observation of the shape, making it highly practical and flexible.

[0112] In another embodiment, the first lens L1, the fifth lens L5, and the eighth lens L8 are all lenses with a convex surface near the object side and a concave surface near the image side; the fourth lens L4, the ninth lens L9, the eleventh lens L11, and the twelfth lens L12 are all lenses with a concave surface near the object side and a convex surface near the image side; and the thirteenth lens L13 has a convex surface near the object side.

[0113] It should be noted that the detection field diameter of the binocular lens provided in this embodiment ranges from 8mm to 48mm. In telephoto mode, the detection field diameter is approximately 8mm, and the optical distortion of the telephoto lens is within 1.2%. In wide-angle mode, the detection field diameter is approximately 48mm, and the optical distortion of the wide-angle lens is within 1.0%, achieving 6x optical zoom. The aforementioned binocular lens, at high resolution, can resolve linewidths as small as 7µm, exhibiting good imaging performance and low distortion. The aforementioned binocular device also accepts light within ±2° of the emitted light without restriction, overcoming the limitation of 0° parallel light emission. Furthermore, this binocular lens has stable optical performance and can operate normally within a temperature range of -10℃ to +50℃, meeting the requirements for operation within this temperature range. Additionally, the detection depth range of the aforementioned binocular lens is 250mm ± 50mm. This detection depth range can refer to the working detection range, specifically the range of distances between the first lens and the target object.

[0114] In one instance, see [link to example]. Figure 4 The radius of curvature R and center thickness T of each lens in the aforementioned binocular lens c The refractive index Nd and Abbe constant Vd can be defined as shown in Table 1 below:

[0115] Table 1

[0116]

[0117] As shown in Table 1, the first cemented surface is the cemented surface formed by the close contact of the first and second lenses; the second cemented surface is the cemented surface formed by the close contact of the third and fourth lenses; the third cemented surface is the cemented surface formed by the close contact of the fifth and sixth lenses; the fourth cemented surface is the cemented surface formed by the close contact of the seventh and eighth lenses; the fifth cemented surface is the cemented surface formed by the close contact of the ninth and tenth lenses; and the sixth cemented surface is the cemented surface formed by the close contact of the eleventh and twelfth lenses. The imaging surface can be an image plane, or it can be a sensor that allows the image to be simulated on the sensor, i.e., using the sensor to simulate the image formed by the human eye under visual conditions.

[0118] As shown in Table 1, the relationships between the total focal length of the binocular lens, the field of view of the binocular lens, the focal length of the first lens group 110, the focal lengths of the third cemented lens group, the fourth cemented lens group, the fifth cemented lens group, and the sixth cemented lens group in wide-angle mode are as follows:

[0119]

[0120] The relationship in telephoto mode is as follows:

[0121]

[0122] The following relationship must be satisfied:

[0123]

[0124] The relationship in wide-angle mode is as follows:

[0125]

[0126] The relationship in telephoto mode is as follows:

[0127]

[0128] The following relationship must be satisfied:

[0129]

[0130] The relationship between the focal length of a stereo lens and its total optical length in wide-angle mode is as follows:

[0131]

[0132] The relationship between the focal length of a binocular lens and its total optical length in telephoto mode is as follows:

[0133]

[0134] The following relationship must be satisfied:

[0135]

[0136] The relationship between the second lens L2 and the third lens L3 satisfies the following equation:

[0137]

[0138] The third lens L3 in the binocular lens has a focal length of 128.48, the eighth lens L8 has a focal length of 20.11, and the thirteenth lens L13 has a focal length of 28.59. The following conditions must be met:

[0139] f3≥128;

[0140] f8≥18;

[0141] f 13 ≥13;

[0142] The tenth lens L10 in the binocular lens has an Abbe number of 59.73, and the twelfth lens L12 has an Abbe number of 35.92. The following conditions must be met:

[0143] Vd 10 ≥28.1;

[0144] Vd 12 ≥33.0;

[0145] The fourth lens L4 in the binocular lens has a refractive index of 1.80, the seventh lens L7 has a refractive index of 1.58, and the thirteenth lens L13 has a refractive index of 1.75. The following conditions must be met:

[0146] Nd4≥1.61;

[0147] Nd7 ≥ 1.58;

[0148] Nd 13 ≥1.50;

[0149] In another example, see [link to example]. Figure 4 The radius of curvature R and center thickness T of each lens in the aforementioned binocular lens c The refractive index Nd and Abbe constant Vd can be defined as shown in Table 2 below:

[0150] Table 2

[0151]

[0152] As shown in Table 2, the relationships between the total focal length of the binocular lens, the field of view of the binocular lens, the focal length of the first lens group 110, the focal lengths of the third cemented lens group, the fourth cemented lens group, the fifth cemented lens group, and the sixth cemented lens group in wide-angle mode are as follows:

[0153]

[0154] The relationship in telephoto mode is as follows:

[0155]

[0156] The following relationship must be satisfied:

[0157]

[0158] The relationship in wide-angle mode is as follows:

[0159]

[0160] The relationship in telephoto mode is as follows:

[0161]

[0162] The following relationship must be satisfied:

[0163]

[0164] The relationship between the focal length of a stereo lens and its total optical length in wide-angle mode is as follows:

[0165]

[0166] The relationship between the focal length of a binocular lens and its total optical length in telephoto mode is as follows:

[0167]

[0168] The following relationship must be satisfied:

[0169]

[0170] The relationship between the second lens L2 and the third lens L3 satisfies the following equation:

[0171]

[0172] The third lens L3 in the binocular lens has a focal length of 138.6, the eighth lens L8 has a focal length of 294.5, and the thirteenth lens L13 has a focal length of 26.3. The following conditions must be met:

[0173] f3≥128;

[0174] f8≥18;

[0175] f 13 ≥13;

[0176] The tenth lens L10 in the binocular lens has an Abbe number of 60.47, and the twelfth lens L12 has an Abbe number of 35.69. The following conditions must be met:

[0177] Vd 10 ≥28.1;

[0178] Vd 12 ≥33.0;

[0179] The fourth lens L4 in the binocular lens has a refractive index of 1.784, the seventh lens L7 has a refractive index of 1.603, and the thirteenth lens L13 has a refractive index of 1.569. The following conditions must be met:

[0180] Nd4≥1.61;

[0181] Nd7 ≥ 1.58;

[0182] Nd 13 ≥1.50;

[0183] In the embodiments of this application, the limiting conditions of the above parameters may be derived from experiments or from the limiting conditions of the device itself.

[0184] Generally, the optical transfer function is a relatively accurate, intuitive, and common way to evaluate the imaging quality of an imaging system. The higher and smoother the curve, the better the imaging quality of the system, and the better it corrects various aberrations (such as spherical aberration, coma, astigmatism, field curvature, axial chromatic aberration, and transverse chromatic aberration).

[0185] Figure 7A , Figure 7B This is a schematic diagram of the optical transfer function of a binocular lens at the wide-angle and telephoto ends according to an embodiment of this application. Figure 7A This is a schematic diagram of the optical transfer function at the wide-angle end of a binocular lens, as shown below. Figure 7A As shown, the horizontal axis represents spatial frequency in lp / mm, and the vertical axis represents the transfer function. Figure 7B This is a schematic diagram of the optical transfer function (MTF) at the telephoto end of a binocular lens. The MTF of this binocular lens in the visible light band at room temperature is shown as a curve. It can be seen that the MTF curve of this binocular lens in the visible light region at room temperature is relatively smooth and concentrated. At high magnification, it can resolve a minimum linewidth of 7µm, achieving high imaging requirements. Here, T represents the meridional plane, and S represents the sagittal plane.

[0186] Figure 8A , Figure 8B , Figure 8C , Figure 8D This is a schematic diagram of field curvature and distortion at the wide-angle and telephoto ends of a binocular lens provided in an embodiment of this application. Figure 8A This is a diagram illustrating the field curvature of a binocular lens at the wide-angle end. Figure 8B This is a diagram illustrating the distortion of a binocular lens at the wide-angle end. Figure 8C This is a schematic diagram of field curvature at the telephoto end of a binocular lens. Figure 8D This diagram illustrates the distortion of a binocular lens at the telephoto end. The field curvature of this binocular lens is controlled within ±0.8mm. Field curvature is also known as "image plane curvature." When a lens exhibits field curvature, the intersection of the entire beam does not coincide with the ideal image point. Although a sharp image point can be obtained at each specific point, the entire image plane is a curved surface. The field curvature curve shows the distance from the current focal plane or image plane to the paraxial focal plane as a function of the field of view coordinates. Meridian field curvature data is measured along the Z-axis (optical axis) from the currently determined focal plane to the paraxial focal plane, and is measured on the meridional (YZ) plane. Sagittal field curvature data measures the distance measured on a plane perpendicular to the meridional plane. The baseline in the diagram is on the optical axis, and the top of the curve represents the maximum field of view (angle or height). No units are set on the vertical axis because the curve is always normalized using the maximum radial field of view.

[0187] As shown in Figure 8, the distortion of this binocular lens is within ±2%. Figure 8 references distortion curves for multiple wavelengths (e.g., 0.486µm, 0.546µm, and 0.656µm), and the curves overlap in Figure 8. Generally speaking, lens distortion is actually a general term for the inherent perspective distortion of optical lenses, that is, distortion caused by perspective. This distortion is very detrimental to the image quality of photographs, but because it is an inherent characteristic of lenses (convex lenses converge light rays, concave lenses diverge light rays), it cannot be eliminated, only improved. As can be seen from Figure 8, the distortion at the wide-angle end of the binocular lens provided in Table 1 or Table 2 of this application is -1.0%, and the distortion at the telephoto end is -1.2%. This distortion setting is to balance the focal length, field of view, and the size of the corresponding camera target surface. The distortion caused by the distortion can be corrected through post-processing image processing.

[0188] Figure 9A , Figure 9B , Figure 9C , Figure 9D , Figure 9E This is a schematic diagram of the lateral light fan of a binocular lens under different fields of view according to an embodiment of this application. Figure 9A This is a schematic diagram of the lateral light fan of a binocular lens in the first field of view, as shown below. Figure 9AAs shown, the first field of view mentioned above can be the field of view corresponding to "image plane: 0.000mm". "Image plane: 0.000mm" means that under the first field of view (0 field of view), the height at which the principal ray intersects the imaging plane is 0.000mm. Figure 9B This is a schematic diagram of the lateral light fan of a binocular lens in the second frontal field of view. The aforementioned second frontal field of view can be the field of view corresponding to "image plane: 1.000mm". "Image plane: 1.000mm" means that in the second frontal field of view, the height at which the principal ray intersects the imaging plane is 1.000mm. Figure 9C This is a schematic diagram of the lateral light fan of a binocular lens in the third frontal field of view. The aforementioned third frontal field of view can be the field of view corresponding to "image plane: 2.000mm". "Image plane: 2.000mm" means that in the third frontal field of view, the height at which the principal ray intersects the imaging plane is 2.000mm. Figure 9D This is a schematic diagram of the lateral light fan of a binocular lens under the second negative field of view. The aforementioned second negative field of view can be the field of view corresponding to "image plane: -1.000mm". "Image plane: -1.000mm" means that under the second negative field of view, the height at which the principal ray intersects the imaging plane is -1.000mm. Figure 9E This diagram illustrates the lateral fan of a binocular lens in the third negative field of view. The third negative field of view corresponds to "Image plane: -2.000mm," meaning that in the third negative field of view, the height at which the principal ray intersects the image plane is -2.000mm. As shown, ex and ey refer to the difference between the height of the ray incident on the image plane from a specific pupil within the current field of view's fan and the height of the principal ray on the image plane. Py represents the pupil coordinates on the meridional fan; px represents the pupil coordinates on the sagittal fan. Furthermore, the fan diagrams appear in pairs for each field of view. The diagram shows that the curves are relatively concentrated, and spherical aberration and dispersion are well controlled.

[0189] Figure 10 This is a schematic diagram of the structure of a surgical device provided in one embodiment of this application, as shown below. Figure 10 As shown, the surgical device includes a movable trolley; the movable trolley is equipped with a monitor, a control touch screen, and a support arm; the end of the support arm is connected to a binocular lens as described in any of the above embodiments; the binocular lens moves with the end of the support arm; the monitor is used to display the imaging data of the binocular lens; the control touch screen generates control commands in response to the user's touch operation to control the movement of the support arm.

[0190] The aforementioned monitor is also equipped with a monitor bracket.

[0191] Based on the same inventive concept, this embodiment also provides a control system for a surgical device. The system includes a monitoring module, a data processing module, and a data acquisition module. The monitoring module monitors the video data acquired by the data acquisition module. The data processing module generates a data acquisition command and sends it to the data acquisition module. The data acquisition module includes a binocular lens and a supplementary lighting unit, as described in any of the above embodiments. The supplementary lighting unit provides synchronous supplementary lighting to the binocular lens based on the received data acquisition command. The binocular lens, in response to the received data acquisition command, acquires video data from a target area.

[0192] It should be noted that the specific examples in this embodiment can refer to the examples described in the above embodiments and optional implementations, and will not be repeated in this embodiment.

[0193] It should be understood that the specific embodiments described herein are merely illustrative of the application and not intended to limit it. All other embodiments derived by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.

[0194] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0195] Obviously, the accompanying drawings are merely some examples or embodiments of this application. Those skilled in the art can apply this application to other similar situations based on these drawings without any creative effort. Furthermore, it is understood that although the work done in this development process may be complex and lengthy, for those skilled in the art, certain design, manufacturing, or production modifications made based on the technical content disclosed in this application are merely conventional technical means and should not be considered as insufficient disclosure of this application.

[0196] The term "embodiment" in this application refers to a specific feature, structure, or characteristic described in connection with an embodiment that may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily imply the same embodiment, nor does it imply that it is mutually exclusive with or independent of other embodiments. It will be clearly or implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0197] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of patent protection. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the appended claims.

Claims

1. A binocular lens characterized in that, The first lens group and two optical paths which are the same structure and are symmetrically distributed with the center of the binocular lens; Each of the two optical paths comprises, from the object side to the image side, a second lens group, a third lens group and an imaging lens group arranged in sequence; The first lens group is sequentially provided with a first lens, a second lens, a third lens and a fourth lens along the light ray incident direction; the second lens group is sequentially provided with a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens, an eleventh lens and a twelfth lens along the light ray incident direction; the third lens group is sequentially provided with a thirteenth lens, a fourteenth lens and a fifteenth lens along the light ray incident direction; the first lens, the fourth lens, the fifth lens and the twelfth lens are negative meniscus lenses; the third lens, the eighth lens, the ninth lens and the eleventh lens are positive meniscus lenses; the second lens, the sixth lens and the fifteenth lens are positive lenticular lenses; the seventh lens, the tenth lens and the fourteenth lens are negative lenticular lenses; the thirteenth lens is a positive plano-convex lens; The reflected light from the object side enters the first lens group and then enters the two optical paths, and is imaged at the imaging lens group of each optical path; The focal length of the binocular lens and the total optical length of the binocular lens satisfy the following relationship: ； Wherein, f is the total focal length of the binocular lens, and TTL is the total optical length of the binocular lens.

2. The binocular lens of claim 1, wherein, The first lens and the second lens form a first cemented lens group; the third lens and the fourth lens form a second cemented lens group; the fifth lens and the sixth lens form a third cemented lens group; the seventh lens and the eighth lens form a fourth cemented lens group; the ninth lens and the tenth lens form a fifth cemented lens group; and the eleventh lens and the twelfth lens form a sixth cemented lens group.

3. The binocular lens of claim 2, wherein, The third cemented lens group, the fourth cemented lens group, the fifth cemented lens group and the sixth cemented lens group satisfy the following relationship: ； ； wherein FOV is a field of view angle of the binocular lens, f G1 is a focal length of the first lens group, f D3 is a focal length of the third cemented group of lenses, f D4 is a focal length of the fourth cemented group of lenses, f D5 is a focal length of the fifth cemented group of lenses, f D6 is a focal length of the sixth cemented group of lenses.

4. The binocular lens of claim 1, wherein, The side of the third lens close to the object side is a concave surface, and the side close to the image side is a convex surface; and the second lens and the third lens satisfy the following relationship: ； Wherein, R3 is the central curvature radius of the side of the third lens close to the object side, and R2 is the central curvature radius of the side of the second lens close to the image side.

5. The binocular lens of claim 1, wherein, The third lens, the eighth lens and the thirteenth lens satisfy the following condition: ； ； ； where f3 is the focal length of the third lens, f8 is the focal length of the eighth lens, f 13 is the focal length of the thirteenth lens.

6. The binocular lens of claim 1, wherein, The tenth lens and the twelfth lens satisfy the following condition: ； ； wherein Vd 10 is the Abbe number of the glass material of the tenth lens, Vd 12 is the Abbe number of the glass material of the twelfth lens.

7. The binocular lens of claim 1, wherein, The fourth lens, the seventh lens and the thirteenth lens satisfy the following condition: ； ； ； wherein Nd4 is the refractive index of the glass material of the fourth lens, Nd7 is the refractive index of the glass material of the seventh lens, and Nd 13 is the refractive index of the glass material of the thirteenth lens.

8. The binocular lens of claim 1, wherein, The second lens group and the third lens group constitute a rear-end zoom system, and the range of optical axis eccentricity between the rear-end zoom system and the first lens group is [-10mm, 10mm].

9. The binocular lens according to any one of claims 1 to 8, wherein, Further comprising: An aperture stop is arranged between the second lens group and the third lens group.

10. The binocular lens according to any one of claims 1 to 8, characterized in that: A flat glass group and a color filter group are sequentially arranged in the order of light incident direction after the third lens group and before the imaging lens group.

11. The binocular lens according to any one of claims 1-8, wherein: A prism group and a color filter group are sequentially arranged in the order of light incident direction after the third lens group and before the imaging lens group.

12. The binocular lens according to any one of claims 1 to 8, wherein, Further comprising a reflecting assembly; The reflecting assembly is located between the second lens group and the third lens group.

13. A surgical apparatus, characterized by The surgical device comprises a movable trolley; The movable trolley is provided with a monitor, a control touch screen and a support arm; The end of the support arm is connected with the binocular lens of any one of claims 1-12; the binocular lens moves along with the end of the support arm; The monitor is used for displaying imaging data of the binocular lens; The control touch screen generates control instructions in response to the touch operation of the user to control the movement of the support arm.

Images