Optical hinge assembly and stereo microscope

Abstract

The present invention relates to the field of microscope technology, and in particular to an optical hinge group and a solid microscope, comprising a hinge seat, a first rotating body, a second rotating body and a reflective optical path component; wherein the reflective optical path component comprises a negative lens and a positive lens group, the positive lens group is arranged between a first right-angle prism and a third right-angle prism, and the negative lens is arranged between the second right-angle prism and the third right-angle prism; by arranging the positive lens group, the light beam aperture is shrunk so that the light beam can smoothly enter the first right-angle prism, and by arranging the negative lens, the light beam aperture is diffused so that the light beam can fill the third right-angle prism; the positive lens group and the negative lens cooperate to form the reflective optical path component, adjust the light beam aperture and imaging azimuth angle, achieve optical image stabilization, and control off-axis vignetting, thereby solving the technical problem in the prior art that the optical hinge group has large off-axis vignetting and poor imaging quality due to the light path passing through multiple groups of prisms, and ensures imaging quality while changing the observation angle.

Description

Technical Field

[0001] The present invention relates to the technical field of microscopes, and in particular to an optical hinge assembly and a solid microscope. Background Art

[0002] A solid microscope, also known as a stereo microscope, is an advanced visual instrument that uses visible light as its illumination source. Its notable feature is its ability to provide an upright, three-dimensional image of the object being observed, enabling the observer to more intuitively and clearly understand the object's three-dimensional structure. Its operating principle is to initially magnify the object through a precisely designed objective lens system, which is then further magnified through the eyepieces, ultimately presenting the observer with a magnified image that provides depth perception.

[0003] Currently, existing stereo microscopes generally consist of an eyepiece, an interpupillary distance adjustment system, an optical hinge system, a zoom objective system, and a light source system connected from top to bottom. The optical hinge system includes two pivotable right-angle prisms and a fixed right-angle prism. By rotating the mounting bracket for the right-angle prisms, the angle between the two right-angle prisms is adjusted, thereby adjusting the light path deflection angle and, therefore, the observation angle of the eyepiece.

[0004] However, since the existing optical hinge group has multiple prisms, due to the size limitations of the lenses, prisms, and mechanical structures, the off-axis light is partially or completely intercepted during imaging, causing the light intensity at the edge of the objective lens imaging surface to be reduced or even zero, affecting the uniformity of the illumination on the objective lens imaging surface and resulting in large off-axis vignetting. Summary of the Invention

[0005] The object of the present invention is to provide an optical hinge assembly and a stereo microscope to solve the technical problem in the prior art that the optical hinge assembly has large off-axis vignetting and poor imaging quality due to the light path passing through multiple groups of prisms.

[0006] In a first aspect, the present invention provides an optical hinge assembly, comprising a hinge base, a first rotating body, a second rotating body, and a reflective optical path component;

[0007] One side of the first rotating body is rotatably arranged on the hinge seat along a first direction, and the other side of the first rotating body is used to connect with the interpupillary distance adjustment component, one side of the second rotating body is rotatably arranged on the hinge seat along a second direction, and the other side of the second rotating body is used to connect with the continuous magnification objective lens group, the first direction and the second direction are arranged in parallel, the first rotating body and the second rotating body are transmission-connected, a first right-angle prism is arranged in the first rotating body, a second right-angle prism is arranged in the second rotating body, a third right-angle prism is arranged in the hinge seat, the second right-angle prism is configured to reflect the object image of the continuous magnification objective lens group onto the third right-angle prism, the third right-angle prism is configured to reflect the object image onto the first right-angle prism, and the first right-angle prism is configured to reflect the object image toward the interpupillary distance adjustment component;

[0008] The reflective optical path component includes a negative lens and a positive lens group, the positive lens group is arranged between the first right-angle prism and the third right-angle prism, and the negative lens is arranged between the second right-angle prism and the third right-angle prism.

[0009] Furthermore, the first rotating body includes a first rotating seat, the first rotating seat is hollow, the first rotating seat is provided with a first light outlet perpendicular to the first direction, the first rotating seat is provided with a first light entrance along the first direction, the first right-angle prism is provided on the first rotating seat, the light entrance surface of the first right-angle prism faces the first light entrance, and the light exit surface of the first right-angle prism faces the first light exit.

[0010] Furthermore, the second rotating body includes a second rotating seat, the second rotating seat is hollow, the second rotating seat is provided with a second light entrance perpendicular to the second direction, the second rotating seat is provided with a second light exit along the second direction, the second right-angle prism is provided on the second rotating seat, the light entrance surface of the second right-angle prism faces the second light entrance, and the light exit surface of the second right-angle prism faces the second light exit.

[0011] Furthermore, a first hinge shaft is provided on a side of the first rotating seat away from the first light entrance along the first direction, and a second hinge shaft is provided on a side of the second rotating seat away from the second light exit along the second direction, a first transmission gear is provided on the first hinge shaft, and a second transmission gear is provided on the second hinge shaft, and the first transmission gear is meshed with the second transmission gear.

[0012] Furthermore, the optical hinge assembly further includes a torsion spring, one end of the torsion spring is connected to the first hinge shaft, and the other end of the torsion spring is connected to the second hinge shaft.

[0013] Furthermore, the optical hinge group also includes a prism frame, which is arranged on one side of the first light entrance of the first rotating seat, and the prism frame is arranged on one side of the second light exit of the second rotating seat, the first rotating seat is rotatably set on the prism frame, the second rotating seat is rotatably set on the prism frame, and the third right-angle prism is fixed to the prism frame.

[0014] Furthermore, a first mounting groove is provided at the first light entrance of the first rotating seat, the positive lens group is provided in the first mounting groove, and the optical axis of the positive lens group is coaxially provided with the incident light path of the first right-angle prism.

[0015] Furthermore, a second mounting groove is provided at the second light outlet of the second rotating seat, the negative lens is provided in the second mounting groove, and the optical axis of the negative lens is coaxially provided with the incident light path of the third right-angle prism.

[0016] Furthermore, the focal length of the positive lens group is set to 502 mm to 615 mm;

[0017] The focal length of the negative lens is set to -425 mm to -332 mm.

[0018] In a second aspect, the present application also provides a stereo microscope, including an eyepiece, a continuously variable magnification objective lens group, a light source power supply cable group, a light source group, a pupil distance adjustment group and the above-mentioned optical hinge group.

[0019] Compared with the prior art, the present invention provides an optical hinge group, including a hinge seat, a first rotating body, a second rotating body and a reflective optical path component; one side of the first rotating body is rotatably arranged on the hinge seat along a first direction, and the other side of the first rotating body is used to connect with the pupil distance adjustment component, one side of the second rotating body is rotatably arranged on the hinge seat along a second direction, and the other side of the second rotating body is used to connect with the continuous magnification objective lens group, the first direction and the second direction are arranged in parallel, the first rotating body and the second rotating body are transmission-connected, a first right-angle prism is arranged in the first rotating body, a second right-angle prism is arranged in the second rotating body, a third right-angle prism is arranged in the hinge seat, the second right-angle prism is configured to reflect the object image of the continuous magnification objective lens group on the third right-angle prism, the third right-angle prism is configured to reflect the object image on the first right-angle prism, and the first right-angle prism is configured to reflect the object image The invention discloses a projection pupil distance adjustment component; the reflection optical path component includes a negative lens and a positive lens group, the positive lens group is arranged between the first right-angle prism and the third right-angle prism, and the negative lens is arranged between the second right-angle prism and the third right-angle prism; by arranging the positive lens group between the first right-angle prism and the third right-angle prism, the light beam aperture is shrunk so that the light beam can smoothly enter the first right-angle prism; at the same time, by arranging the negative lens between the second right-angle prism and the third right-angle prism, the light beam aperture is diffused so that the light beam can fill the third right-angle prism; the positive lens group and the negative lens cooperate to form a reflection optical path component, adjust the light beam aperture and imaging azimuth, realize optical image stabilization, and control off-axis vignetting, thereby solving the technical problem in the prior art that the optical hinge group has large off-axis vignetting and poor imaging quality due to the light path passing through multiple groups of prisms, and realizes changing the observation angle while ensuring the imaging quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 A schematic diagram of the overall structure of an optical hinge assembly provided by an embodiment of the present invention;

[0022] Figure 2 A cross-sectional view of the overall structure of the optical hinge assembly provided by an embodiment of the present invention;

[0023] Figure 3 This is an exploded view of the overall structure of the optical hinge assembly provided by an embodiment of the present invention.

[0024] Reference numerals:

[0025] 100. Hinge seat; 110. Third right-angle prism; 120. Prism holder;

[0026] 200, first rotating body; 210, first right-angle prism; 220, first rotating base; 221, first light outlet; 230, first hinge axis; 240, first transmission gear;

[0027] 300, second rotating body; 310, second right-angle prism; 320, second rotating base; 321, second light entrance; 330, second hinge axis; 340, second transmission gear;

[0028] 410, negative lens; 420, positive lens group;

[0029] 500. Torsion spring. DETAILED DESCRIPTION

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0033] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of the application is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0034] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0035] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0036] Example 1

[0037] like Figures 1 to 3 As shown, an embodiment of the present invention provides an optical hinge assembly, including a hinge base 100, a first rotating body 200, a second rotating body 300 and a reflective optical path component; one side of the first rotating body 200 is rotatably arranged on the hinge base 100 along a first direction, and the other side of the first rotating body 200 is used to connect with the pupil distance adjustment component, one side of the second rotating body 300 is rotatably arranged on the hinge base 100 along a second direction, and the other side of the second rotating body 300 is used to connect with the continuous zoom objective lens group, the first direction and the second direction are arranged in parallel, the first rotating body 200 and the second rotating body 300 are transmission-connected, and a first right-angle prism 21 is arranged in the first rotating body 200 0, a second right-angle prism 310 is provided in the second rotating body 300, a third right-angle prism 110 is provided in the hinge seat 100, the second right-angle prism 310 is configured to reflect the object image of the continuous zoom objective lens group to the third right-angle prism 110, the third right-angle prism 110 is configured to reflect the object image to the first right-angle prism 210, and the first right-angle prism 210 is configured to reflect the object image toward the pupil distance adjustment component; the reflective optical path component includes a negative lens 410 and a positive lens group 420, the positive lens group 420 is provided between the first right-angle prism 210 and the third right-angle prism 110, and the negative lens 410 is provided between the second right-angle prism 310 and the third right-angle prism 110.

[0038] That is, the optical hinge group provided by the embodiment of the present invention sets a positive lens group 420 between the first right-angle prism 210 and the third right-angle prism 110, thereby shrinking the light beam aperture so that the light beam can smoothly enter the first right-angle prism 210. At the same time, a negative lens 410 is set between the second right-angle prism 310 and the third right-angle prism 110, thereby diffusing the light beam aperture so that the light beam can fill the third right-angle prism 110. The positive lens group 420 and the negative lens 410 cooperate to form a reflective optical path component, adjust the light beam aperture and imaging azimuth, achieve optical image stabilization, and control off-axis vignetting. This solves the technical problem in the prior art that the optical hinge group has large off-axis vignetting and poor imaging quality due to the light path passing through multiple groups of prisms, and achieves the goal of changing the observation angle while ensuring the imaging quality.

[0039] Specifically, the hinge base 100 is configured as a hollow square box with openings at both ends. One side of the first rotating body 200 is rotatably mounted on the hinge base 100 along a first direction, and one side of the second rotating body 300 is rotatably mounted on the hinge base 100 along a second direction. In this embodiment, the first direction and the second direction are horizontal directions at different heights, and the first direction and the second direction are arranged in parallel. The hinge base 100 extends from the other side of the first rotating body 200 and is bolted to the pupil distance adjustment assembly. The hinge base 100 extends from the other side of the second rotating body 300 and is bolted to the continuous magnification objective lens assembly. In this way, the angle between the first rotating body 200 and the second rotating body 300 can be adjusted by rotating the first rotating body 200 or the second rotating body 300. A first right-angle prism 210 is disposed within the first rotating body 200. The incident optical axis of the first right-angle prism 210 coincides with the central axis of rotation of the first rotating body 200, and the light-emitting optical axis of the first right-angle prism 210 is arranged perpendicular to the first direction, thereby transmitting the optical path of the object image to the pupil distance adjustment assembly connected to the first rotating body 200. A second right-angle prism 310 is disposed within the second rotating body 300. The light-emitting optical axis of the second right-angle prism 310 coincides with the central axis of rotation of the second rotating body 300, and the incident optical axis of the second right-angle prism 310 is arranged perpendicular to the second direction, thereby receiving the object image light beam emitted by the continuous zoom objective lens. A third right-angle prism 110 is fixed to the hinge base 100 and is disposed on one side of the first rotating body 200 and the second rotating body 300. The incident optical axis of the third right-angle prism 110 coincides with the light-emitting optical axis of the second right-angle prism 310, and the light-emitting optical axis coincides with the incident optical axis of the first right-angle prism 210. Thus, when the first rotating body 200 and the second rotating body 300 rotate, the first right-angle prism 210 and the second right-angle prism 310 will also rotate accordingly, but the light exiting path and the incident light path of the two do not move, that is, the change of the observation angle is achieved. The negative lens 410 is arranged between the second right-angle prism 310 and the third right-angle prism 110, providing a negative focal length, which can diffuse the aperture of the object image beam reflected by the second right-angle prism 310, so that it can adapt to the third right-angle prism 110. The positive lens group 420 includes a negative lens 410 and a positive lens, with a positive combined focal length, which can shrink the aperture of the objective lens light speed reflected by the third right-angle prism 110, so that it can adapt to the first right-angle prism 210. The negative lens 410 and the positive lens group 420 cooperate with each other to adjust the beam aperture, thereby adapting to the prism model, reducing off-axis vignetting, and improving imaging quality.

[0040] Preferably, the focal length of the positive lens group 420 is set to 502 mm to 615 mm; and the focal length of the negative lens group 410 is set to -425 mm to -332 mm.

[0041] Specifically, in this embodiment, the focal length of the positive lens group 420 is set to 558mm, and the focal length of the negative lens 410 is set to -387mm. By controlling the focal lengths of the positive lens group 420 and the negative lens 410, the magnification of the entire device can be adjusted, thereby coordinating with other lenses in the stereo microscope to ensure that the entire device has a focal length of 175mm. This meets the requirements for focal length and field of view of the entire device.

[0042] Furthermore, the first rotating body 200 includes a first rotating base 220, the first rotating base 220 is hollow, the first rotating base 220 is provided with a first light outlet 221 perpendicular to the first direction, the first rotating base 220 is provided with a first light entrance along the first direction, the first right-angle prism 210 is provided on the first rotating base 220, the light entrance surface of the first right-angle prism 210 faces the first light entrance, and the light exit surface of the first right-angle prism 210 faces the first light outlet 221.

[0043] Specifically, the first rotating base 220 is hollow, and the first right-angle prism 210 is fixed in the hollow cavity of the first rotating base 220. The first rotating base 220 is provided with a first light outlet 221 perpendicular to the first direction, and the first rotating base 220 is provided with a first light inlet along the first direction. The light inlet surface of the first right-angle prism 210 faces the first light inlet, and the light outlet surface of the first right-angle prism 210 faces the first light outlet 221. In this way, the first right-angle prism 210 can receive the object image light beam from the first light inlet and emit the object image light beam from the first light outlet 221, thereby changing the direction of the object image.

[0044] Furthermore, the second rotating body 300 includes a second rotating base 320, the second rotating base 320 is hollow, the second rotating base 320 is provided with a second light inlet 321 perpendicular to the second direction, the second rotating base 320 is provided with a second light outlet along the second direction, the second right-angle prism 310 is provided on the second rotating base 320, the light incident surface of the second right-angle prism 310 faces the second light inlet 321, and the light outlet surface of the second right-angle prism 310 faces the second light outlet.

[0045] Specifically, the second rotating base 320 is hollow, and the second right-angle prism 310 is fixed in the hollow cavity of the second rotating base 320. The second rotating base 320 is provided with a second light outlet perpendicular to the second direction, and the second rotating base 320 is provided with a second light inlet 321 along the second direction. The light inlet surface of the second right-angle prism 310 faces the second light inlet 321, and the light outlet surface of the second right-angle prism 310 faces the second light outlet. In this way, the second right-angle prism 310 can receive the object image light beam from the second light inlet 321 and emit the object image light beam from the second light outlet, thereby changing the direction of the object image.

[0046] Furthermore, a first hinge shaft 230 is provided on a side of the first rotating seat 220 away from the first light entrance along the first direction, and a second hinge shaft 330 is provided on a side of the second rotating seat 320 away from the second light exit along the second direction. A first transmission gear 240 is provided on the first hinge shaft 230, and a second transmission gear 340 is provided on the second hinge shaft 330. The first transmission gear 240 is meshed and connected with the second transmission gear 340.

[0047] Specifically, the first hinge shaft 230 is disposed on the side wall of the first rotating base 220 and is arranged along the first direction. The second hinge shaft 330 is disposed on the side wall of the second rotating base 320 and is arranged along the second direction. The first hinge shaft 230 is provided with a first transmission gear 240, and the second hinge shaft 330 is provided with a second transmission gear 340. The transmission ratio of the first transmission gear 240 and the second transmission gear 340 can be set to 1:1, or can be specifically set according to the required adjustment efficiency. Through the engagement of the first transmission gear 240 and the second transmission gear 340, the first rotating base 220 and the second rotating base 320 can be adjusted simultaneously. Through the synchronous rotation between the two, the first right-angle prism 210 and the second right-angle prism 310 are ensured to rotate synchronously, the imaging azimuth angle is compensated, the optical image is stabilized, and the orientation of the output image is ensured.

[0048] Furthermore, the optical hinge assembly further includes a torsion spring 500 , one end of the torsion spring 500 is connected to the first hinge shaft 230 , and the other end of the torsion spring 500 is connected to the second hinge shaft 330 .

[0049] Specifically, one end of the torsion spring 500 is connected to the first hinge shaft 230, and the other end of the torsion spring 500 is connected to the second hinge shaft 330. By arranging the torsion spring 500 on the first hinge shaft 230 and the second hinge shaft 330, a certain damping effect can be provided for the rotation of the hinge shaft 230 and the second hinge shaft 330, thereby ensuring stable transmission of the two.

[0050] Furthermore, the optical hinge group also includes a prism frame 120, which is arranged on one side of the first light entrance of the first rotating seat 220, and the prism frame 120 is arranged on one side of the second light exit of the second rotating seat 320. The first rotating seat 220 is rotatably set on the prism frame 120, the second rotating seat 320 is rotatably set on the prism frame 120, and the third right-angle prism 110 is fixed to the prism frame 120.

[0051] Specifically, the prism holder 120 is generally shaped like an infinity. Two circular fixing holes are provided on one side of the prism holder 120. One of the fixing holes is rotatably provided on one side of the first light inlet of the first rotating seat 220, and the other fixing hole is rotatably provided on one side of the second light outlet of the second rotating seat 320, thereby enabling the first rotating seat 220 and the second rotating seat 320 to be rotatably provided on the prism holder 120. A third right-angle prism 110 is fixed to the other side of the prism holder 120. The object-image light path reflected by the second right-angle prism 310 can pass through one of the fixing holes and enter the third right-angle prism 110, while the object-image light path reflected by the third right-angle prism 110 can pass through the other fixing hole and enter the first right-angle prism 210. A backlash-eliminating sponge is also provided between the prism holder 120 and the third right-angle prism 110 to ensure the secure fixation of the third right-angle prism 110. By providing the prism holder 120, the spacing between the optical axes of the respective right-angle prisms and the vertical axis concentricity can be effectively guaranteed.

[0052] Furthermore, a first mounting groove is provided at the first light entrance of the first rotating base 220 , and the positive lens group 420 is disposed in the first mounting groove. The optical axis of the positive lens group 420 is coaxially arranged with the incident light path of the first right-angle prism 210 .

[0053] Specifically, the first mounting groove is configured as a circular groove, and the positive lens group 420 is fixedly mounted within the first mounting groove, with the optical axis of the positive lens group 420 coaxially arranged with the incident light path of the first right-angle prism 210. In this embodiment, the positive lens group 420 is configured as a positive lens and a negative lens 410 separated by a spacer. This ensures that the positive lens group 420 can be securely positioned between the first and third right-angle lenses, thereby narrowing the beam aperture.

[0054] Furthermore, a second mounting groove is provided at the second light outlet of the second rotating seat 320 , and the negative lens 410 is disposed in the second mounting groove. The optical axis of the negative lens 410 is coaxially disposed with the incident light path of the third right-angle prism 110 .

[0055] Specifically, the second mounting groove is configured as a circular groove, and the negative lens 410 is fixedly mounted in the second mounting groove, with the optical axis of the negative lens 410 coaxially arranged with the incident light path of the third right-angle prism 110. This ensures that the positive lens group 420 can be securely positioned between the first and third right-angle lenses, thereby narrowing the beam aperture.

[0056] Example 2

[0057] In a second aspect, the present application further provides a stereo microscope comprising an eyepiece, a zoom objective lens assembly, a light source power cable assembly, a light source assembly, an interpupillary distance adjustment assembly, and the aforementioned optical hinge assembly. The eyepiece, zoom objective lens assembly, light source power cable assembly, light source assembly, and interpupillary distance adjustment assembly provided in this embodiment are all well-known prior art in the art, and the optical hinge assembly in this embodiment has been fully described in the aforementioned first embodiment and will not be further elaborated in this embodiment.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An optical hinge assembly, characterized in that: It comprises a hinge seat (100), a first rotating body (200), a second rotating body (300) and a reflective optical path component; One side of the first rotating body (200) is rotatably arranged on the hinge seat (100) along a first direction, and the other side of the first rotating body (200) is used to connect with the pupil distance adjustment component. One side of the second rotating body (300) is rotatably arranged on the hinge seat (100) along a second direction, and the other side of the second rotating body (300) is used to connect with the continuous zoom objective lens group. The first direction and the second direction are arranged in parallel. The first rotating body (200) and the second rotating body (300) are transmission-connected. The first rotating body (200) 0) is provided with a first right-angle prism (210), a second right-angle prism (310) is provided in the second rotating body (300), a third right-angle prism (110) is provided in the hinge seat (100), the second right-angle prism (310) is configured to reflect an object image of the continuously variable magnification objective lens group onto the third right-angle prism (110), the third right-angle prism (110) is configured to reflect the object image onto the first right-angle prism (210), and the first right-angle prism (210) is configured to reflect the object image toward the pupil distance adjustment component; The reflective optical path assembly comprises a negative lens (410) and a positive lens group (420), wherein the positive lens group (420) is arranged between the first right-angle prism (210) and the third right-angle prism (110), and the negative lens (410) is arranged between the second right-angle prism (310) and the third right-angle prism (110).

2. The optical hinge assembly according to claim 1, wherein: The first rotating body (200) comprises a first rotating seat (220), the first rotating seat (220) is hollow, the first rotating seat (220) is provided with a first light outlet (221) perpendicular to the first direction, the first rotating seat (220) is provided with a first light entrance along the first direction, the first right-angle prism (210) is provided on the first rotating seat (220), the light entrance surface of the first right-angle prism (210) faces the first light entrance, and the light exit surface of the first right-angle prism (210) faces the first light exit (221).

3. The optical hinge assembly according to claim 2, wherein: The second rotating body (300) includes a second rotating seat (320), the second rotating seat (320) is hollow, the second rotating seat (320) is provided with a second light inlet (321) perpendicular to the second direction, the second rotating seat (320) is provided with a second light outlet along the second direction, the second right-angle prism (310) is provided on the second rotating seat (320), the light inlet surface of the second right-angle prism (310) faces the second light inlet (321), and the light outlet surface of the second right-angle prism (310) faces the second light outlet.

4. The optical hinge assembly according to claim 3, wherein: A first hinge shaft (230) is provided on a side of the first rotating seat (220) away from the first light inlet along the first direction, and a second hinge shaft (330) is provided on a side of the second rotating seat (320) away from the second light outlet along the second direction, a first transmission gear (240) is provided on the first hinge shaft (230), and a second transmission gear (340) is provided on the second hinge shaft (330), and the first transmission gear (240) is meshedly connected with the second transmission gear (340).

5. The optical hinge assembly according to claim 4, wherein: The optical hinge assembly further comprises a torsion spring (500), one end of the torsion spring (500) is connected to the first hinge shaft (230), and the other end of the torsion spring (500) is connected to the second hinge shaft (330).

6. The optical hinge assembly according to claim 4, wherein: The optical hinge assembly further includes a prism frame (120), wherein the prism frame (120) is arranged on one side of the first light inlet of the first rotating seat (220), and the prism frame (120) is arranged on one side of the second light outlet of the second rotating seat (320), the first rotating seat (220) is rotatably arranged on the prism frame (120), the second rotating seat (320) is rotatably arranged on the prism frame (120), and the third right-angle prism (110) is fixed to the prism frame (120).

7. The optical hinge assembly according to any one of claims 3 to 6, characterized in that: A first mounting groove is provided at the first light entrance of the first rotating seat (220), the positive lens group (420) is provided in the first mounting groove, and the optical axis of the positive lens group (420) is coaxially arranged with the incident light path of the first right-angle prism (210).

8. The optical hinge assembly according to any one of claims 3 to 6, wherein: A second mounting groove is provided at the second light outlet of the second rotating seat (320), the negative lens (410) is provided in the second mounting groove, and the optical axis of the negative lens (410) is coaxially arranged with the incident light path of the third right-angle prism (110).

9. The optical hinge assembly according to any one of claims 2 to 6, wherein: The focal length of the positive lens group (420) is set to 502 mm to 615 mm; The focal length of the negative lens (410) is set to -425mm to -332mm.

10. A stereo microscope, characterized in that: The optical hinge assembly comprises an eyepiece, a continuously variable magnification objective lens assembly, a light source power supply cable assembly, a light source assembly, a pupil distance adjustment assembly, and the optical hinge assembly according to any one of claims 1 to 9.

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