A stereo microscope

Abstract

The present invention relates to the technical field of microscopes, and in particular to a solid microscope comprising an eyepiece, an interpupillary distance adjustment component, an optical hinge group, a prism steering group, a distributed reflective optical path component, and a continuously variable magnification objective lens group; the distributed reflective optical path component comprises a negative lens group, a positive lens, a negative lens, and a positive lens group; the negative lens group is arranged between the prism steering group and the continuously variable magnification objective lens group, the positive lens is arranged between the optical hinge group and the prism steering group, and both the negative lens and the positive lens group are arranged between right-angle prisms in the optical hinge group; by sequentially arranging the negative lens group, the positive lens, the negative lens, and the positive lens group between various components of the solid microscope, thereby combining the mechanical structure spatial layout, adjusting the light beam aperture, reducing the interception of the light beam by the prism, and reducing off-axis vignetting, thereby solving the technical problem in the prior art that the solid microscope has large off-axis vignetting and poor imaging quality due to the light path passing through multiple prism groups, and meeting the overall imaging requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of microscopes, and in particular to a stereomicroscope. 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 assembly, an optical hinge assembly, a zoom objective assembly, and a light source assembly, all connected from top to bottom. The sample to be observed is placed below the zoom objective assembly, and the light source assembly surrounds the bottom of the objective assembly to provide illumination for the microscope. The zoom objective assembly includes a zoom component that continuously adjusts the magnification of the object image and presents a stable image at the formed position. The optical hinge assembly connects the interpupillary distance adjustment assembly and the zoom objective assembly. The interpupillary distance adjustment assembly includes a beam splitter prism that splits the object image optical path into two, forming left and right optical paths, respectively, for imaging the two eyepieces.

[0004] However, existing solid microscopes have many components, among which the total length of the prism and the air gap converted into an equivalent air layer thickness exceeds the focal length corresponding to the appropriate magnification range, resulting in the focal length and field of view of the entire machine not meeting customer requirements, resulting in large off-axis vignetting and low image quality. Summary of the Invention

[0005] The object of the present invention is to provide a stereo microscope to solve the technical problem in the prior art that the stereo microscope 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 a stereo microscope comprising an eyepiece, an interpupillary distance adjustment assembly, an optical hinge assembly, a prism steering assembly, a distributed reflective optical path assembly, and a continuously variable magnification objective lens assembly;

[0007] The eyepiece is connected to the pupil distance adjustment assembly, the continuous zoom objective lens group is arranged above the observed object, the prism steering group is connected to the continuous zoom objective lens group, and both ends of the optical hinge group are respectively connected to the pupil distance adjustment assembly and the prism steering group;

[0008] The distributed reflective optical path assembly includes a negative lens group, a positive lens, a negative lens and a positive lens group. The negative lens group is arranged between the prism steering group and the continuous magnification objective lens group to expand the light beam aperture. The positive lens is arranged between the optical hinge group and the prism steering group to shrink the light beam aperture. The optical hinge group is sequentially provided with a first right-angle prism, a second right-angle prism and a third right-angle prism. The negative lens is arranged between the second right-angle prism and the third right-angle prism in the optical hinge group to expand the light beam aperture. The positive lens group is arranged between the first right-angle prism and the third right-angle prism to shrink the light beam aperture.

[0009] Furthermore, the prism steering group includes a beam splitter prism seat, a beam splitter prism, a camera optical path tube and an industrial camera;

[0010] The bottom of the beam splitter prism seat is provided with a first through hole in the vertical direction, the top of the beam splitter prism seat is provided with a second through hole in the vertical direction, and the bottom of the beam splitter prism seat is provided with a third through hole in the horizontal direction. The bottom of the beam splitter prism seat is connected to the continuous zoom objective lens group, and the beam splitter prism is fixed in the beam splitter prism seat to receive the light beam of the continuous zoom objective lens group and split the light beam in the direction of the second through hole and the direction of the third through hole. One end of the camera light path tube is connected to the third through hole of the beam splitter prism, and the other end of the camera light path tube is connected to the industrial camera. The negative lens group is fixed to the first through hole, and the optical axis of the negative lens group coincides with the light beam.

[0011] Furthermore, the negative lens group includes a first lens and a second lens that are spaced apart, the focal lengths of the first lens and the second lens are opposite, and the optical axes of the first lens and the second lens coincide.

[0012] Furthermore, the stereo microscope further comprises a positive lens mounting seat;

[0013] The bottom of the positive lens mounting seat is connected to the beam splitter prism seat, and the top of the positive lens mounting seat is connected to the optical hinge group. The positive lens mounting seat is provided with a mounting hole running through it in the vertical direction, and the positive lens is arranged in the mounting hole, and the mounting hole is coaxially arranged with the first through hole.

[0014] Furthermore, the optical hinge assembly is provided with a hinge seat, a first rotating body, and a second rotating body;

[0015] One side of the first rotating body is rotatable along the first direction and is arranged on the hinge seat, the other side of the first rotating body is connected to the pupil distance adjustment component, one side of the second rotating body is rotatable along the second direction and is arranged on the hinge seat, the other side of the second rotating body is connected to 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, the first right-angle prism is arranged in the first rotating body, the second right-angle prism is arranged in the second rotating body, the 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 toward the pupil distance adjustment component.

[0016] Furthermore, the imaging optical path tube is hollow, and a lens group is arranged in the imaging optical path tube;

[0017] The lens group is configured to be able to adjust the focal length and beam aperture of the object image light beam, and the lens group cooperates with the negative lens group and the positive lens to form a camera light path and reverse camera light path component.

[0018] Furthermore, a lens barrel is further provided in the imaging optical path barrel. The lens barrel is slidably provided on the imaging optical path barrel along the axial direction of the imaging optical path barrel, and the lens group is provided on the lens barrel.

[0019] Furthermore, the combined focal length of the negative lens group is set to -540 mm to -660 mm;

[0020] The focal length of the positive lens is set to 125mm to 142mm;

[0021] The focal length of the positive lens group is set to 502mm to 615mm;

[0022] The focal length of the negative lens is set to -425 mm to -332 mm.

[0023] Furthermore, the total focal length of the combination formed by the distributed reflective optical path component, the eyepiece, the pupil distance adjustment component, the optical hinge group, the prism steering group and the continuous zoom objective lens group is set to 175mm to 180mm.

[0024] Furthermore, the stereo microscope further includes a magnification feedback group, and two ends of the magnification feedback group are respectively connected to the continuous magnification objective lens group and the industrial camera.

[0025] Compared with the prior art, the present invention provides a stereoscopic microscope, comprising an eyepiece, an interpupillary distance adjustment component, an optical hinge group, a prism steering group, a distributed reflective optical path component and a continuous zoom objective lens group; the eyepiece is connected to the interpupillary distance adjustment component, the continuous zoom objective lens group is arranged above the observed object, the prism steering group is connected to the continuous zoom objective lens group, and both ends of the optical hinge group are respectively connected to the interpupillary distance adjustment component and the prism steering group; the distributed reflective optical path component comprises a negative lens group, a positive lens, a negative lens and a positive lens group, the negative lens group is arranged between the prism steering group and the continuous zoom objective lens group to expand the light beam aperture, the positive lens is arranged between the optical hinge group and the prism steering group to shrink the light beam aperture, and the optical hinge group A first right-angle prism, a second right-angle prism and a third right-angle prism are arranged in sequence, a negative lens is arranged between the second right-angle prism and the third right-angle prism in the optical hinge group to expand the light beam aperture, and a positive lens group is arranged between the first right-angle prism and the third right-angle prism to shrink the light beam aperture; by arranging the negative lens group, the positive lens, the negative lens and the positive lens group in sequence between the various components of the solid microscope, the light beam aperture is adjusted in combination with the spatial layout of the mechanical structure, ensuring that the prism does not intercept or intercepts less light beams, reducing off-axis vignetting, solving the technical problem in the prior art that the solid microscope has large off-axis vignetting and poor imaging quality due to the light path passing through multiple groups of prisms, and meeting the overall imaging requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] 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.

[0027] Figure 1 A schematic diagram of the overall structure of a stereomicroscope provided by an embodiment of the present invention;

[0028] Figure 2 A cross-sectional view of the overall structure of a stereomicroscope provided by an embodiment of the present invention;

[0029] Figure 3 A schematic diagram of the structure of an optical hinge assembly in a stereo microscope provided by an embodiment of the present invention;

[0030] Figure 4 A cross-sectional view of the structure of an optical hinge assembly in a stereomicroscope provided by an embodiment of the present invention;

[0031] Figure 5 A schematic diagram of the structure of a beam splitter prism holder and a beam splitter prism in a stereo microscope provided by an embodiment of the present invention;

[0032] Figure 6 This is a cross-sectional view of the structure of the imaging optical path tube in the stereo microscope provided by an embodiment of the present invention.

[0033] Reference numerals:

[0034] 100, eyepiece;

[0035] 200, pupil distance adjustment component;

[0036] 300, optical hinge assembly; 310, first right-angle prism; 320, second right-angle prism; 330, third right-angle prism; 340, hinge base; 350, first rotating body; 360, second rotating body;

[0037] 400, prism steering assembly; 410, beam splitter prism mount; 420, beam splitter prism; 430, camera optical path tube; 431, lens assembly; 432, lens tube; 440, industrial camera;

[0038] 510, negative lens group; 520, positive lens; 521, positive lens mounting seat; 530, negative lens; 540, positive lens group;

[0039] 600, continuous zoom objective lens set;

[0040] 700, multiplier feedback group. DETAILED DESCRIPTION

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0046] 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.

[0047] 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.

[0048] like Figures 1 to 6As shown, an embodiment of the present invention provides a stereoscopic microscope, including an eyepiece 100, an interpupillary distance adjustment component 200, an optical hinge group 300, a prism steering group 400, a distributed reflective optical path component and a continuous zoom objective lens group 600; the eyepiece 100 is connected to the interpupillary distance adjustment component 200, the continuous zoom objective lens group 600 is arranged above the observed object, the prism steering group 400 is connected to the continuous zoom objective lens group 600, and the two ends of the optical hinge group 300 are respectively connected to the interpupillary distance adjustment component 200 and the prism steering group 400; the distributed reflective optical path component includes a negative lens group 510, a positive lens 520, a negative lens 530 and a positive lens group 540, the negative lens group 510 is arranged between the prism steering group 400 and the continuous magnification objective lens group 600 to expand the light beam aperture, the positive lens 520 is arranged between the optical hinge group 300 and the prism steering group 400 to shrink the light beam aperture, the optical hinge group 300 is sequentially provided with a first right-angle prism 310, a second right-angle prism 320 and a third right-angle prism 330, the negative lens 530 is arranged between the second right-angle prism 320 and the third right-angle prism 330 in the optical hinge group 300 to expand the light beam aperture, and the positive lens group 540 is arranged between the first right-angle prism 310 and the third right-angle prism 330 to shrink the light beam aperture.

[0049] That is, the solid microscope provided by the embodiment of the present invention sequentially arranges a negative lens group 510, a positive lens 520, a negative lens 530 and a positive lens group 540 between the various components of the solid microscope, thereby combining the mechanical structure spatial layout to adjust the light beam aperture, ensure that the prism does not intercept or intercepts less light beams, and reduce off-axis vignetting, thereby solving the technical problem in the prior art that the solid microscope has large off-axis vignetting and poor imaging quality due to the light path passing through multiple groups of prisms, and meets the overall imaging requirements.

[0050] Specifically, the zoom objective lens assembly 600 is positioned above the object being observed. It includes a zoom component capable of continuously adjusting the magnification of the object image and presenting a stable image at the desired position. The top of the zoom objective lens assembly 600 is connected to the prism steering assembly 400, which serves as a pivot between the zoom objective lens assembly 600 and the optical hinge assembly 300. The prism steering assembly 400 includes a beam splitting mechanism that splits the optical path into two via a beam splitting prism 420, sending the beams to the optical hinge assembly 300 and the industrial camera 440, respectively. One end of the optical hinge assembly 300 is connected to the eyepiece 100 and the interpupillary distance adjustment assembly, while the other end is connected to the prism steering assembly 400, thereby changing the viewing angle of the eyepiece 100. The interpupillary distance adjustment assembly 200 includes a beam splitting prism 420 that splits the object image optical path into two, forming left and right optical paths for imaging into the two eyepieces 100, respectively. The distributed reflective optical path assembly includes a negative lens group 510, a positive lens 520, a negative lens 530, and a positive lens group 540. The positive lens 520 is disposed between the optical hinge group 300 and the prism steering group 400 to narrow the beam aperture. The optical hinge group 300 is sequentially provided with a first right-angle prism 310, a second right-angle prism 320, and a third right-angle prism 330. The negative lens 530 is disposed between the second right-angle prism 320 and the third right-angle prism 330 in the optical hinge group 300 to expand the beam aperture. The positive lens group 540 is disposed between the first right-angle prism 310 and the third right-angle prism 330 to narrow the beam aperture.

[0051] Furthermore, the prism steering group 400 includes a beam splitter prism seat 410, a beam splitter prism 420, a camera light path tube 430 and an industrial camera 440; the bottom of the beam splitter prism seat 410 is provided with a first through hole in the vertical direction, the top of the beam splitter prism seat 410 is provided with a second through hole in the vertical direction, the bottom of the beam splitter prism seat 410 is provided with a third through hole in the horizontal direction, the bottom of the beam splitter prism seat 410 is connected to the continuous zoom objective lens group 600, the beam splitter prism 420 is fixed in the beam splitter prism seat 410 to receive the light beam of the continuous zoom objective lens group 600 and split the light beam in the direction of the second through hole and the direction of the third through hole, one end of the camera light path tube 430 is connected to the third through hole of the beam splitter prism 420, and the other end of the camera light path tube 430 is connected to the industrial camera 440, the negative lens group 510 is fixed to the first through hole, and the optical axis of the negative lens group 510 coincides with the light beam.

[0052] Specifically, the beam splitter prism mount 410 is square and hollow. A second circular through hole is provided at the top, thereby communicating with the prism steering assembly 400 and being connected to the prism steering assembly 400 via bolts. A first circular through hole is provided at the bottom, thereby communicating with the zoom objective lens assembly 600 and being connected to the zoom objective lens assembly 600 via bolts. The beam splitter prism mount 410 is provided with a third through hole in the horizontal direction. The imaging optical path tube 430 is arranged toward the third through hole and is connected to the beam splitter prism mount 410 via bolts. The beam splitter prism 420 is fixed within the beam splitter prism mount 410, with its incident surface facing the zoom objective lens assembly 600. The two light outputs are directed toward the prism steering assembly 400 and the imaging optical path tube 430, respectively. In this embodiment, the beam splitter prism mount 410 also includes a type 2 porro prism, which is configured in conjunction with the beam splitter prism 420 to achieve the requirements of inverting the inverted image formed by the objective lens system and splitting the imaging optical path. The camera optical path tube 430 is horizontally arranged on one side of the beam splitter prism seat 410. The beam splitter prism 420 is arranged directly above the continuous zoom objective lens group 600, thereby receiving the object image beam from the continuous zoom objective lens group 600 and splitting it into horizontal and vertical directions, and then transmitting the object image beam to the prism steering group 400 and the camera optical path tube 430. The other end of the camera optical path tube 430 is connected to the industrial camera 440 by bolts. A fixing groove is provided in the first through hole, and the negative lens 530 is installed in the fixing groove, thereby ensuring that the optical axis of the negative lens group 510 coincides with the object image beam emitted by the continuous zoom objective lens group 600. As a result, the beam diameter of the object image beam can also be adjusted by the negative lens group 510 so that it accurately enters the beam splitter prism 420.

[0053] Furthermore, the negative lens group 510 includes a first lens and a second lens that are spaced apart. The focal lengths of the first lens and the second lens are opposite, and the optical axes of the first lens and the second lens coincide with each other.

[0054] Specifically, negative lens assembly 510 includes a first lens and a second lens spaced apart from each other. The first lens is a convex mirror, and the second lens is a concave mirror, with a spacer between them. The first and second lenses have opposite focal lengths and coincident optical axes. This allows the first and second lenses to adjust the refraction of the light beam, thereby changing the aperture and focal length of the object image beam, without changing the direction of the object image.

[0055] Furthermore, the solid microscope also includes a positive lens mounting seat 521; the bottom of the positive lens mounting seat 521 is connected to the dichroic prism seat 410, and the top of the positive lens mounting seat 521 is connected to the optical hinge group 300. The positive lens mounting seat 521 is provided with a mounting hole along the vertical direction, and the positive lens 520 is arranged in the mounting hole, and the mounting hole is coaxially arranged with the first through hole.

[0056] Specifically, the bottom of the positive lens mount 521 is connected to the beam splitter prism mount 410 via bolts, thereby securing the positive lens mount 521 to the beam splitter prism mount 410. Simultaneously, the top of the positive lens mount 521 is bolted to the optical hinge assembly 300. A mounting hole is vertically provided through the positive lens mount 521, and the positive lens 520 is disposed in the mounting hole. The mounting hole is coaxially disposed with the first through hole, thereby enabling the optical axis of the positive lens 520 to coincide with the object image beam emitted by the beam splitter prism 420, thereby ensuring the optical axis coincidence of the positive lens 520. Furthermore, the positive lens 520 is used to adjust the beam aperture of the object image beam so that it accurately enters the beam splitter prism 420.

[0057] Furthermore, the optical hinge assembly 300 is provided with a hinge seat 340, a first rotating body 350, and a second rotating body 360; one side of the first rotating body 350 is rotatably provided on the hinge seat 340 along a first direction, and the other side of the first rotating body 350 is connected to the pupil distance adjustment component 200, and one side of the second rotating body 360 is rotatably provided on the hinge seat 340 along a second direction, and the other side of the second rotating body 360 is connected to the continuous zoom objective lens assembly 600, and the first direction and the second direction are arranged in parallel, and the first rotating body 350 and The second rotating body 360 is in transmission connection, a first right-angle prism 310 is provided in the first rotating body 350, a second right-angle prism 320 is provided in the second rotating body 360, a third right-angle prism 330 is provided in the hinge seat 340, the second right-angle prism 320 is configured to reflect the object image of the continuous zoom objective lens group 600 to the third right-angle prism 330, the third right-angle prism 330 is configured to reflect the object image to the first right-angle prism 310, and the first right-angle prism 310 is configured to reflect the object image toward the pupil distance adjustment component 200.

[0058] Specifically, the hinge base 340 is configured as a hollow square box with openings at both ends. One side of the first rotating body 350 is rotatably mounted on the hinge base 340 along a first direction, and one side of the second rotating body 360 is rotatably mounted on the hinge base 340 along a second direction. In this embodiment, the first and second directions are horizontal directions at different heights, and the first and second directions are arranged in parallel. The hinge base 340 extends from the other side of the first rotating body 350 and is bolted to the pupil distance adjustment assembly 200. The hinge base 340 extends from the other side of the second rotating body 360 and is bolted to the continuous magnification objective lens assembly 600. In this way, the angle between the first rotating body 350 and the second rotating body 360 can be adjusted by rotating the first rotating body 350 or the second rotating body 360. A first right-angle prism 310 is disposed within the first rotating body 350. The incident optical axis of the first right-angle prism 310 coincides with the central axis of rotation of the first rotating body 350, and the light-emitting optical axis of the first right-angle prism 310 is arranged perpendicular to the first direction, thereby transmitting the optical path of the object image to the pupil distance adjustment assembly 200 connected to the first rotating body 350. A second right-angle prism 320 is disposed within the second rotating body 360. The light-emitting optical axis of the second right-angle prism 320 coincides with the central axis of rotation of the second rotating body 360, and the incident optical axis of the second right-angle prism 320 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 330 is fixed to the hinge base 340 and is disposed on one side of the first rotating body 350 and the second rotating body 360. The incident optical axis of the third right-angle prism 330 coincides with the light-emitting optical axis of the second right-angle prism 320, and the light-emitting optical axis coincides with the incident optical axis of the first right-angle prism 310. Thus, when the first rotating body 350 and the second rotating body 360 rotate, the first right-angle prism 310 and the second right-angle prism 320 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 530 is arranged between the second right-angle prism 320 and the third right-angle prism 330, providing a negative focal length, which can diffuse the aperture of the object image beam reflected by the second right-angle prism 320, so that it can adapt to the third right-angle prism 330. The positive lens group 540 includes a negative lens 530 and a positive lens 520, with a positive combined focal length, which can shrink the aperture of the objective lens light speed reflected by the third right-angle prism 330, so that it can adapt to the first right-angle prism 310. The negative lens 530 and the positive lens group 540 cooperate with each other to adjust the beam aperture, thereby adapting to the prism model, reducing off-axis vignetting, and improving imaging quality.

[0059] Furthermore, the camera optical path tube 430 is hollow, and a lens group 431 is provided inside the camera optical path tube 430; the lens group 431 is configured to be able to adjust the focal length and beam aperture of the object image light beam, and the lens group 431 cooperates with the negative lens group 510 and the positive lens 520 to form a camera optical path reverse camera optical path component.

[0060] Specifically, the camera optical path tube 430 is hollow and cylindrical, and the lens group is arranged in the camera optical path tube 430 along the optical path. The lens group 431 can be set to a positive lens group 540 or a negative lens group 510 according to the actual needs of the industrial camera 440, thereby converging the beam aperture or expanding the beam aperture, and adjusting the focal length of the object image at the same time.

[0061] Furthermore, a lens barrel 432 is further provided in the imaging optical path barrel 430 . The lens barrel 432 is slidably provided in the imaging optical path barrel 430 along the axial direction of the imaging optical path barrel 430 , and the lens group is provided in the lens barrel 432 .

[0062] Specifically, the lens barrel 432 is cylindrical and hollow, with an outer diameter slightly smaller than the inner diameter of the imaging optical path barrel 430, thereby facilitating its sliding placement within the imaging optical path barrel 430. The lens assembly is snap-fitted into the lens barrel 432. By sliding the lens barrel 432 within the imaging optical path barrel 430, the distance between the lens assembly and the industrial camera 440 and the beam splitter prism 420 can be adjusted to meet the imaging surface diameter and magnification requirements of the industrial camera 440, compensate for manufacturing errors in the industrial camera 440, the objective lens system, etc., and ensure synchronization of image clarity between the industrial camera 440 and the eyepiece 100 system.

[0063] Furthermore, the combined focal length of the negative lens group 510 is set to -540mm to -660mm; the focal length of the positive lens 520 is set to 125mm to 142mm; the focal length of the positive lens group 540 is set to 502mm to 615mm; and the focal length of the negative lens 530 is set to -425mm to -332mm.

[0064] Specifically, in this embodiment, the combined focal length of negative lens group 510 is set to -600mm; the focal length of positive lens 520 is set to 139mm; the focal length of positive lens group 540 is set to 558mm; and the focal length of negative lens 530 is set to -386mm. By coordinating the focal lengths of negative lens group 510, positive lens 520, positive lens group 540, and negative lens 530, the focal length of the entire device can be adjusted while meeting the mechanical space requirements of the entire device, thereby meeting the appropriate magnification range requirements of the entire device.

[0065] Furthermore, the total focal length of the combination formed by the distributed reflective optical path assembly, the eyepiece 100, the pupil distance adjustment assembly 200, the optical hinge group 300, the prism steering group 400 and the continuous zoom objective lens group 600 is set to 175mm to 180mm.

[0066] Specifically, in this embodiment, the focal lengths of the eyepiece 100, the pupil distance adjustment assembly 200, the optical hinge group 300, the prism steering group 400 and the continuous zoom objective lens group 600 are fixed, and the combined focal length of the distributed reflective optical path assembly can be adjusted by the respective focal lengths of the negative lens group 510, the positive lens 520, the positive lens group 540 and the negative lens 530, thereby ensuring that the focal length of the entire machine is in the range of 175mm to 180mm, preferably set to 175mm, thereby meeting the observation requirements of the eyepiece 100.

[0067] Furthermore, the stereo microscope further includes a magnification feedback group 700 , and two ends of the magnification feedback group 700 are respectively connected to the continuous zoom objective lens group 600 and the industrial camera 440 .

[0068] Specifically, the magnification feedback assembly 700 includes connecting wires and a magnification test sensor. The magnification test sensor is provided on the zoom objective assembly 600 and can be configured as a photoelectric sensor to detect the position of an adjustment component on the zoom objective assembly 600 to detect magnification data. The connecting wires connect the industrial camera 440 and the magnification test sensor, thereby feeding the magnification data back to the industrial camera 440. This enables real-time feedback of the magnification, facilitating accurate detection by the industrial camera 440.

[0069] 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. A stereo microscope, characterized in that: It comprises an eyepiece (100), an interpupillary distance adjustment component (200), an optical hinge assembly (300), a prism steering assembly (400), a distributed reflective optical path assembly and a continuously variable magnification objective lens assembly (600); The eyepiece (100) is connected to the pupil distance adjustment assembly (200), the continuously variable magnification objective lens group (600) is arranged above the observed object, the prism steering group (400) is connected to the continuously variable magnification objective lens group (600), and the two ends of the optical hinge group (300) are respectively connected to the pupil distance adjustment assembly (200) and the prism steering group (400); The distributed reflective optical path assembly comprises a negative lens group (510), a positive lens (520), a negative lens (530) and a positive lens group (540), wherein the negative lens group (510) is arranged between the prism steering group (400) and the continuously variable magnification objective lens group (600) to expand the light beam aperture, the positive lens (520) is arranged between the optical hinge group (300) and the prism steering group (400) to shrink the light beam aperture, and the optical hinge group ( The optical hinge assembly (300) is provided with a first right-angle prism (310), a second right-angle prism (320) and a third right-angle prism (330) in sequence, the negative lens (530) is provided between the second right-angle prism (320) and the third right-angle prism (330) in the optical hinge assembly (300) to expand the light beam aperture, and the positive lens assembly (540) is provided between the first right-angle prism (310) and the third right-angle prism (330) to shrink the light beam aperture.

2. The stereomicroscope according to claim 1, characterized in that The prism steering group (400) comprises a beam splitter prism seat (410), a beam splitter prism (420), a camera optical path tube (430) and an industrial camera (440); The bottom of the beam splitter prism seat (410) is provided with a first through hole in the vertical direction, the top of the beam splitter prism seat (410) is provided with a second through hole in the vertical direction, and the bottom of the beam splitter prism seat (410) is provided with a third through hole in the horizontal direction. The bottom of the beam splitter prism seat (410) is connected to the continuous zoom objective lens group (600). The beam splitter prism (420) is fixed in the beam splitter prism seat (410) to receive the light beam of the continuous zoom objective lens group (600) and split the light beam in the direction of the second through hole and the direction of the third through hole. One end of the camera light path tube (430) is connected to the third through hole of the beam splitter prism (420), and the other end of the camera light path tube (430) is connected to the industrial camera (440). The negative lens group (510) is fixed to the first through hole, and the optical axis of the negative lens group (510) coincides with the light beam.

3. The stereo microscope according to claim 2, characterized in that The negative lens group (510) comprises a first lens and a second lens which are spaced apart from each other, wherein the focal lengths of the first lens and the second lens are opposite, and the optical axes of the first lens and the second lens coincide with each other.

4. The stereomicroscope according to claim 3, characterized in that The stereo microscope further comprises a positive lens mounting seat (521); The bottom of the positive lens mounting seat (521) is connected to the dichroic prism seat (410), and the top of the positive lens mounting seat (521) is connected to the optical hinge group (300). The positive lens mounting seat (521) is provided with a mounting hole running through it in a vertical direction. The positive lens (520) is arranged in the mounting hole, and the mounting hole is coaxially arranged with the first through hole.

5. The stereo microscope according to claim 3, characterized in that: The optical hinge assembly (300) is provided with a hinge seat (340), a first rotating body (350), and a second rotating body (360); One side of the first rotating body (350) is rotatably arranged on the hinge seat (340) along a first direction, and the other side of the first rotating body (350) is connected to the pupil distance adjustment component (200). One side of the second rotating body (360) is rotatably arranged on the hinge seat (340) along a second direction, and the other side of the second rotating body (360) is connected to the continuous magnification objective lens group (600). The first direction and the second direction are arranged in parallel. The first rotating body (350) and the second rotating body (360) are transmission-connected. The first right-angle prism (310) is arranged The invention relates to a method for adjusting the pupil distance of an object and a lens element, wherein the lens element is placed in the first rotating body (350), the second right-angle prism (320) is arranged in the second rotating body (360), the third right-angle prism (330) is arranged in the hinge seat (340), the second right-angle prism (320) is configured to reflect the object image of the continuous zoom objective lens group (600) to the third right-angle prism (330), the third right-angle prism (330) is configured to reflect the object image to the first right-angle prism (310), and the first right-angle prism (310) is configured to reflect the object image toward the pupil distance adjustment component (200).

6. The stereomicroscope according to claim 2, characterized in that: The imaging optical path barrel (430) is hollow, and a lens group (431) is arranged inside the imaging optical path barrel (430); The lens group (431) is configured to be able to adjust the focal length and beam diameter of the light beam of the object image, and the lens group (431) cooperates with the negative lens group (510) and the positive lens (520) to form a camera optical path and reverse camera optical path component.

7. The stereo microscope according to claim 6, characterized in that A lens barrel (432) is also provided in the imaging optical path barrel (430). The lens barrel (432) is slidably provided on the imaging optical path barrel (430) along the axial direction of the imaging optical path barrel (430), and the lens group (431) is provided on the lens barrel (432).

8. The stereomicroscope according to any one of claims 1 to 7, characterized in that: The combined focal length of the negative lens group (510) is set to -540 mm to -660 mm; The focal length of the positive lens (520) is set to 125 mm to 142 mm; The focal length of the positive lens group (540) is set to 502 mm to 615 mm; The focal length of the negative lens (530) is set to -425mm to -332mm.

9. The stereo microscope according to claim 8, characterized in that The total focal length of the combination formed by the distributed reflective optical path component, the eyepiece (100), the pupil distance adjustment component (200), the optical hinge group (300), the prism steering group (400) and the continuously variable magnification objective lens group (600) is set to 175 mm to 180 mm.

10. The stereo microscope according to claim 2, characterized in that: The stereo microscope further comprises a magnification feedback group (700), and two ends of the magnification feedback group (700) are respectively connected to the continuously variable magnification objective lens group (600) and the industrial camera (440).

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