Stereomicroscope

Abstract

The invention relates to the technical field of microscopes, in particular to a stereomicroscope which comprises an eyepiece, an interpupillary distance adjusting assembly, an optical hinge set, a prism steering set, a distributed reflection light path assembly and a continuous zoom objective lens set. The distributed back-shooting light path assembly 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, the positive lens is arranged between the optical hinge group and the prism steering group, and the negative lens and the positive lens group are arranged between rectangular prisms in the optical hinge group; a negative lens group, a positive lens group, a negative lens group and a positive lens group are sequentially arranged among all parts of the stereomicroscope, so that the space layout of a mechanical structure is combined, the aperture of a light beam is adjusted, interception of the prism to the light beam is reduced, and off-axis vignetting is reduced; the technical problems of large off-axis vignetting and poor imaging quality caused by the fact that a light path passes through a plurality of groups of prisms in a stereomicroscope in the prior art are solved, and the overall imaging requirement is met.

Description

Technical Field

[0001] The present invention relates to the technical field of microscopes, and in particular to a stereomicroscope. Background Art

[0002] A stereomicroscope, also known as a dissecting microscope, is an advanced visual instrument based on visible light as the illumination source. Its remarkable feature is that it can provide a positive image three-dimensional sense of the object to be observed, enabling the observer to more intuitively and clearly understand the three-dimensional structure of the object. Its working principle is to initially magnify the object through a precisely designed objective lens system, and then further magnify it through the eyepiece, and finally present an enlarged and depth-perceived image to the observer.

[0003] Currently, existing stereomicroscopes generally have an eyepiece, a pupil distance adjustment group, an optical hinge group, a continuously variable magnification objective lens group, and a light source group connected from top to bottom. The sample to be observed is arranged below the continuously variable magnification objective lens group, and the light source group is arranged around the bottom of the objective lens group to provide illumination for the microscope. The continuously variable magnification objective lens group has a variable magnification element that can continuously adjust the magnification ratio of the object image and present a stable object image at the forming position. The optical hinge group is used to connect the pupil distance adjustment group and the continuously variable magnification objective lens group. The pupil distance adjustment component has a beam splitting prism group that can divide the object image optical path into two, thus forming left and right optical paths and respectively imaging on two eyepieces.

[0004] However, due to having many components in existing stereomicroscopes, the total length of the prism and the air gap are equivalent to the thickness of an equivalent air layer, which has exceeded the focal length corresponding to the appropriate magnification range, resulting in the focal length and field of view of the whole machine not meeting the requirements of customers, and there is a large off-axis vignetting and low imaging quality. Summary of the Invention

[0005] The purpose of the present invention is to provide a stereomicroscope to solve the technical problem that the existing stereomicroscope has large off-axis vignetting and poor imaging quality due to the optical path passing through multiple groups of prisms.

[0006] In a first aspect, a stereomicroscope provided by the present invention includes an eyepiece, a pupil distance adjustment component, an optical hinge group, a prism turning group, a distributed inverse shooting optical path component, and a continuously variable magnification objective lens group; The eyepiece is connected to the pupil distance adjustment component, the continuously variable magnification objective lens group is arranged above the object to be observed, the prism turning group is connected to the continuously variable magnification objective lens group, and both ends of the optical hinge group are respectively connected to the pupil distance adjustment component and the prism turning group; The distributed anti-photographing optical path component includes a negative lens group, a positive lens, a negative lens, and a positive lens group. The negative lens group is disposed between the prism steering group and the continuously variable magnification objective lens group to expand the beam aperture. The positive lens is disposed between the optical hinge group and the prism steering group to contract the 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 disposed between the second right-angle prism and the third right-angle prism in the optical hinge group to expand the beam aperture. The positive lens group is disposed between the first right-angle prism and the third right-angle prism to contract the beam aperture.

[0007] Further, the prism steering group includes a beam splitting prism seat, a beam splitting prism, a photographing optical path tube, and an industrial camera. The bottom of the beam splitting prism seat is provided with a first through hole in the vertical direction, the top of the beam splitting prism seat is provided with a second through hole in the vertical direction, the bottom of the beam splitting prism seat is provided with a third through hole in the horizontal direction. The bottom of the beam splitting prism seat is connected to the continuously variable magnification objective lens group. The beam splitting prism is fixed in the beam splitting prism seat to receive the beam of the continuously variable magnification objective lens group and split the beam in the directions of the second through hole and the third through hole. One end of the photographing optical path tube is connected to the third through hole of the beam splitting prism, and the other end of the photographing optical path tube is connected to the industrial camera. The negative lens group is fixed in the first through hole, and the optical axis of the negative lens group coincides with the beam.

[0008] Further, the negative lens group includes a first lens and a second lens arranged at intervals. 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.

[0009] Further, the stereomicroscope further includes a positive lens mounting seat. The bottom of the positive lens mounting seat is connected to the beam splitting prism seat, 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 penetrating in the vertical direction. The positive lens is disposed in the mounting hole, and the mounting hole is coaxially arranged with the first through hole.

[0010] Further, the optical hinge group is provided with a hinge seat, a first rotating body, and a second rotating body. One side of the first rotating body is rotatably arranged on the hinge seat along a first direction, the other side of the first rotating body is connected to the interpupillary distance adjustment assembly, one side of the second rotating body is rotatably arranged on the hinge seat along a second direction, the other side of the second rotating body is connected to the continuously variable 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 in transmission connection, 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 continuously variable magnification objective lens group to the third right-angle prism, the third right-angle prism is configured to reflect the object image to the first right-angle prism, and the first right-angle prism is configured to reflect the object image towards the interpupillary distance adjustment assembly.

[0011] Further, the imaging optical path tube is hollow, and a lens group is arranged inside the imaging optical path tube; 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 an imaging optical path and a reverse imaging optical path assembly.

[0012] Further, a lens barrel is also arranged inside the imaging optical path tube, the lens barrel is slidably arranged in the imaging optical path tube along the axial direction of the imaging optical path tube, and the lens group is arranged in the lens barrel.

[0013] Further, the combined focal length of the negative lens group is set to be -540 mm to -660 mm; The focal length of the positive lens is set to be 125 mm to 142 mm; The focal length of the positive lens group is set to be 502 mm to 615 mm; The focal length of the negative lens is set to be -425 mm to -332 mm.

[0014] Further, the combined total focal length formed by the cooperation of the distributed reverse imaging optical path assembly with the eyepiece, the interpupillary distance adjustment assembly, the optical hinge group, the prism steering group and the continuously variable magnification objective lens group is set to be 175 mm to 180 mm.

[0015] Further, the stereomicroscope further includes a magnification feedback group, and both ends of the magnification feedback group are respectively connected to the continuously variable magnification objective lens group and the industrial camera.

[0016] Compared with the prior art, a stereomicroscope provided by the present invention includes an eyepiece, an interpupillary distance adjustment component, an optical hinge group, a prism steering group, a distributed anti-photographing optical path component, and a continuously variable magnification objective lens group; the eyepiece is connected to the interpupillary distance adjustment component, the continuously variable magnification objective lens group is arranged above the object to be observed, the prism steering group is connected to the continuously variable magnification 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 anti-photographing optical path component 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 continuously variable magnification objective lens group to expand the beam aperture, and the positive lens is arranged between the optical hinge group and the prism steering group to contract the beam aperture. The optical hinge group is successively 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 beam aperture, and the positive lens group is arranged between the first right-angle prism and the third right-angle prism to contract the beam aperture; by successively arranging a negative lens group, a positive lens, a negative lens, and a positive lens group between the various components of the stereomicroscope, combined with the spatial layout of the mechanical structure, the beam aperture is adjusted to ensure that the prism does not intercept or intercept less light, reduce off-axis vignetting, and solve the technical problem of large off-axis vignetting and poor imaging quality in the prior art due to the optical path passing through multiple groups of prisms in the stereomicroscope, meeting the overall imaging requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 is a schematic diagram of the overall structure of the stereomicroscope provided by the embodiment of the present invention; Figure 2 is a sectional view of the overall structure of the stereomicroscope provided by the embodiment of the present invention; Figure 3 is a schematic diagram of the structure of the optical hinge group in the stereomicroscope provided by the embodiment of the present invention; Figure 4 is a sectional view of the structure of the optical hinge group in the stereomicroscope provided by the embodiment of the present invention; Figure 5 is a schematic diagram of the structure of the beam splitter prism base and the beam splitter prism in the stereomicroscope provided by the embodiment of the present invention; Figure 6 is a sectional view of the structure of the camera optical path tube in the stereomicroscope provided by the embodiment of the present invention.

[0019] Reference numerals: 100, Eyepiece; 200, Interpupillary distance adjustment component; 300, Optical hinge group; 310, First right-angle prism; 320, Second right-angle prism; 330, Third right-angle prism; 340, Hinge seat; 350, First rotating body; 360, Second rotating body; 400, Prism steering group; 410, Beam splitter prism seat; 420, Beam splitter prism; 430, Camera optical path tube; 431, Lens group; 432, Lens barrel; 440, Industrial camera; 510, Negative lens group; 520, Positive lens; 521, Positive lens mounting seat; 530, Negative lens; 540, Positive lens group; 600, Continuous zoom objective lens group; 700, Magnification feedback group. Detailed implementation manners

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0021] 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 claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0022] It should be noted that: Similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0023] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this application is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0024] In addition, terms such as "horizontal", "vertical", "hanging", etc. do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0025] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "arranged", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0026] The following will describe in detail some embodiments of the present invention with reference to the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0027] As Figures 1 to 6 shown, an embodiment of the present invention provides a stereomicroscope, including an eyepiece 100, an interpupillary distance adjustment assembly 200, an optical hinge group 300, a prism turning group 400, a distributed reverse imaging optical path assembly, and a continuously variable magnification objective lens group 600; the eyepiece 100 is connected to the interpupillary distance adjustment assembly 200, the continuously variable magnification objective lens group 600 is arranged above the object to be observed, the prism turning group 400 is connected to the continuously variable magnification objective lens group 600, and both ends of the optical hinge group 300 are respectively connected to the interpupillary distance adjustment assembly 200 and the prism turning group 400; the distributed reverse imaging optical path assembly 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 turning group 400 and the continuously variable magnification objective lens group 600 to expand the beam aperture, the positive lens 520 is arranged between the optical hinge group 300 and the prism turning group 400 to contract the beam aperture, the optical hinge group 300 is successively 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 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 contract the beam aperture.

[0028] That is, the stereomicroscope provided by the embodiment of the present invention adjusts the beam aperture by sequentially arranging a negative lens group 510, a positive lens 520, a negative lens 530, and a positive lens group 540 between various components of the stereomicroscope, thereby combining the spatial layout of the mechanical structure to ensure that the prism does not intercept or intercept less light beams, reduce off-axis vignetting, and solve the technical problem in the prior art that the stereomicroscope has large off-axis vignetting and poor imaging quality due to the light path passing through multiple groups of prisms, meeting the overall imaging requirements.

[0029] Specifically, the continuously variable magnification objective lens group 600 is arranged above the object to be observed. The continuously variable magnification objective lens group 600 has variable magnification elements that can continuously adjust the magnification of the object image and present a stable object image at the forming position. The top of the continuously variable magnification objective lens group 600 is connected to the prism turning group 400. The prism turning group 400 is arranged as a hub between the continuously variable magnification objective lens group 600 and the optical hinge group 300. The prism turning group 400 has a beam splitting mechanism that can split the optical path into two parts through the beam splitting prism 420 in the beam splitting mechanism and project them to the optical hinge group 300 and the industrial camera 440 respectively. One end of the optical hinge group 300 is connected to the eyepiece 100 and the interpupillary distance adjustment group, and the other end is connected to the prism turning group 400, thereby changing the viewing angle of the eyepiece 100. The interpupillary distance adjustment assembly 200 has a beam splitting prism 420 group that can divide the object image optical path into two parts, thereby forming left and right optical paths and imaging on two eyepieces 100 respectively. The distributed inverse shooting 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 arranged between the optical hinge group 300 and the prism turning group 400 to contract 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 arranged between the two second right-angle prisms 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 arranged between the first right-angle prism 310 and the third right-angle prism 330 to contract the beam aperture.

[0030] Further, the prism turning group 400 includes a beam splitting prism seat 410, a beam splitting prism 420, a camera optical path tube 430, and an industrial camera 440; a first through hole is provided in the vertical direction at the bottom of the beam splitting prism seat 410, a second through hole is provided in the vertical direction at the top of the beam splitting prism seat 410, a third through hole is provided in the horizontal direction at the bottom of the beam splitting prism seat 410, the bottom of the beam splitting prism seat 410 is connected to the continuous zoom objective lens group 600, the beam splitting prism 420 is fixed in the beam splitting prism seat 410 to receive the light beam of the continuous zoom objective lens group 600 and split the light beam in the directions of the second through hole and the third through hole, one end of the camera optical path tube 430 is connected to the third through hole of the beam splitting prism 420, the other end of the camera optical path tube 430 is connected to the industrial camera 440, and the negative lens group 510 is fixed in the first through hole, and the optical axis of the negative lens group 510 coincides with the light beam.

[0031] Specifically, the beam splitting prism seat 410 is specifically square and hollow. A circular second through hole is provided at the top, so as to communicate with the prism turning group 400 and be connected to the prism turning group 400 by bolts. A circular first through hole is provided at its bottom, so as to communicate with the continuous zoom objective lens group 600 and be connected to the continuous zoom objective lens group 600 by bolts. The beam splitting prism seat 410 is provided with a third through hole in the horizontal direction, the camera optical path tube 430 is arranged facing the third through hole and is connected to the beam splitting prism seat 410 by bolts. The beam splitting prism 420 is fixed in the beam splitting prism seat 410, and its incident surface faces the continuous zoom objective lens group 600. The two light exits respectively face the prism turning group 400 and the camera optical path tube 430. In this embodiment, there is also a type 2 Porro prism in the beam splitting prism seat 410, which is cooperatively arranged with the beam splitting prism 420 to meet the requirements of inverting the inverted image formed by the objective lens system once again and splitting the camera optical path. The camera optical path tube 430 is arranged horizontally on one side of the beam splitting prism seat 410. The beam splitting prism 420 is arranged directly above the continuous zoom objective lens group 600, so as to receive the object image light beam of the continuous zoom objective lens group 600 and split it in the horizontal and vertical directions, and then convey the object image light beam to the prism turning 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, so as to ensure that the optical axis of the negative lens group 510 coincides with the object image light beam emitted by the continuous zoom objective lens group 600. Thus, the beam diameter of the object image light beam can also be adjusted by the negative lens group 510 to accurately enter the beam splitting prism 420.

[0032] Further, the negative lens group 510 includes a first lens and a second lens arranged at intervals, 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.

[0033] Specifically, the negative lens group 510 includes a first lens and a second lens that are spaced apart. The first lens is configured as a convex mirror, and the second lens is configured as a concave mirror, with a spacer disposed therebetween. The focal lengths of the first lens and the second lens are opposite, and their optical axes coincide. Thus, the first lens and the second lens can refract the light beam without changing the object image direction, thereby changing the object image beam aperture and focal length.

[0034] Furthermore, the stereomicroscope further includes a positive lens mount 521; the bottom of the positive lens mount 521 is connected to the beam splitter prism mount 410, the top of the positive lens mount 521 is connected to the optical hinge group 300, the positive lens mount 521 is provided with a mounting hole penetrating in the vertical direction, the positive lens 520 is disposed in the mounting hole, and the mounting hole is coaxially arranged with the first through hole.

[0035] Specifically, the bottom of the positive lens mount 521 is connected to the beam splitter prism mount 410 by bolts, so that the positive lens mount 521 is fixed on the beam splitter prism mount 410. At the same time, the top of the positive lens mount 521 is connected to the optical hinge group 300 by bolts. The positive lens mount 521 is provided with a mounting hole penetrating in the vertical direction, the positive lens 520 is disposed in the mounting hole, and the mounting hole is coaxially arranged with the first through hole, which also enables the optical axis of the positive lens 520 to coincide with the object image beam emitted by the beam splitter prism 420, ensuring the optical axis coincidence degree of the positive lens 520, and further adjusting the beam aperture of the object image beam through the positive lens 520 so that it accurately enters the beam splitter prism 420.

[0036] Furthermore, the optical hinge group 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 disposed on the hinge seat 340 along a first direction, the other side of the first rotating body 350 is connected to the interpupillary distance adjustment assembly 200, one side of the second rotating body 360 is rotatably disposed on the hinge seat 340 along a second direction, the other side of the second rotating body 360 is connected to the continuously variable magnification objective lens group 600, the first direction and the second direction are parallelly arranged, the first rotating body 350 and the second rotating body 360 are drivingly connected, a first right-angle prism 310 is disposed in the first rotating body 350, a second right-angle prism 320 is disposed in the second rotating body 360, a third right-angle prism 330 is disposed in the hinge seat 340, the second right-angle prism 320 is configured to reflect the object image of the continuously variable magnification 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 towards the interpupillary distance adjustment assembly 200.

[0037] Specifically, the hinge seat 340 is specifically arranged as a hollow square box body with openings at both ends. One side of the first rotating body 350 is rotatably arranged on the hinge seat 340 along the first direction, and one side of the second rotating body 360 is rotatably arranged on the hinge seat 340 along the second direction. In this embodiment, the first direction and the second direction are horizontal directions at different heights and are arranged in parallel. The other side of the first rotating body 350 extends out of the hinge seat 340 and is bolted to the interpupillary distance adjustment assembly 200, and the other side of the second rotating body 360 extends out of the hinge seat 340 and is bolted to the continuously variable magnification objective lens group 600. Thus, the included angle between the first rotating body 350 and the second rotating body 360 can be adjusted by the rotation of the first rotating body 350 or the second rotating body 360. A first right-angle prism 310 is arranged in the first rotating body 350, and the incident optical axis of the first right-angle prism 310 coincides with the rotation central axis of the first rotating body 350, while the outgoing optical axis of the first right-angle prism 310 is arranged perpendicular to the first direction. Thus, the optical path of the object image can be transmitted to the interpupillary distance adjustment assembly 200 connected to the first rotating body 350. A second right-angle prism 320 is arranged in the second rotating body 360, and the outgoing optical axis of the second right-angle prism 320 coincides with the rotation central axis of the second rotating body 360, while the incident optical axis of the second right-angle prism 320 is arranged perpendicular to the second direction, so as to receive the object image light beam emitted by the continuously variable magnification objective lens. A third right-angle prism 330 is fixed to the hinge seat 340 and is arranged on one side of the first rotating body 350 and the second rotating body 360. Its incident optical axis coincides with the outgoing optical axis of the second right-angle prism 320, and the outgoing 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 outgoing optical path and the incident optical path of the two remain unchanged, that is, the observation angle is changed. The negative lens 530 is arranged between the second right-angle prism 320 and the third right-angle prism 330 to provide a negative focal length, which can diffuse the aperture of the object image light beam reflected by the second right-angle prism 320, so as to adapt it to the third right-angle prism 330. The positive lens group 540 includes a negative lens 530 and a positive lens 520 and has a positive combined focal length, which can contract the aperture of the objective lens light beam reflected by the third right-angle prism 330, so as to adapt it 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, so as to adapt to the prism model, reduce off-axis vignetting, and improve the imaging quality.

[0038] Furthermore, the camera optical path tube 430 is hollow, and a lens group 431 is arranged in the camera optical path tube 430; the lens group 431 is configured to be able to adjust the focal length and the 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 assembly.

[0039] Specifically, the imaging optical path tube 430 is hollow and cylindrical. The lens group is arranged in the imaging optical path tube 430 along the optical path. The lens group 431 can be set as a positive lens group 540 or a negative lens group 510 according to the actual requirements of the industrial camera 440, so as to converge or expand the beam aperture and adjust the object-image focal length at the same time.

[0040] Furthermore, a lens barrel 432 is also arranged in the imaging optical path tube 430. The lens barrel 432 is slidably arranged in the imaging optical path tube 430 along the axial direction of the imaging optical path tube 430, and the lens group is arranged on the lens barrel 432.

[0041] Specifically, the lens barrel 432 is specifically set as a cylindrical shape and is hollow. Its outer diameter is slightly smaller than the inner diameter of the imaging optical path tube 430, so as to be easily slidably arranged in the imaging optical path tube 430. The lens group is clamped in the lens barrel 432. By sliding the lens barrel 432 in the imaging optical path tube 430, the distance between the lens group and the industrial camera 440 and the beam splitting prism 420 can be adjusted to meet the requirements of the imaging surface diameter and magnification of the industrial camera 440, and make up for the manufacturing errors of the industrial camera 440, the objective lens system, etc., to ensure the image surface clarity synchronization between the industrial camera 440 and the eyepiece 100 system.

[0042] Furthermore, 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 -425 mm to -332 mm.

[0043] Specifically, in this embodiment, the combined focal length of the negative lens group 510 is set to -600 mm; the focal length of the positive lens 520 is set to 139 mm; the focal length of the positive lens group 540 is set to 558 mm; the focal length of the negative lens 530 is set to -386 mm. Through the focal length cooperation between the negative lens group 510, the positive lens 520, the positive lens group 540 and the negative lens 530, the overall focal length can be adjusted under the condition of meeting the mechanical structure space of the whole machine, and then the appropriate magnification range requirements of the whole machine can be met.

[0044] Furthermore, the combined total focal length formed by the cooperation of the distributed anti-imaging optical path component, the eyepiece 100, the interpupillary 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.

[0045] Specifically, in this embodiment, the focal lengths of the eyepiece 100, the interpupillary distance adjustment assembly 200, the optical hinge group 300, the prism steering group 400, and the continuously variable magnification objective lens group 600 are fixed. The combined focal length of the distributed reverse photography 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, so as to ensure that the overall focal length of the machine is in the range of 175 mm to 180 mm, preferably set to 175 mm, thus meeting the observation requirements of the eyepiece 100.

[0046] Furthermore, the stereomicroscope further includes a magnification feedback group 700. The 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.

[0047] Specifically, the magnification feedback group 700 is specifically provided with connection wires and a magnification test sensor. The magnification test sensor is arranged on the continuously variable magnification objective lens group 600 and can be set as a photoelectric sensor to detect the position of the adjustment component on the continuously variable magnification objective lens group 600 to detect magnification data. The connection wires connect the industrial camera 440 and the magnification test sensor, thereby feeding back the magnification data to the industrial camera 440, and thus the real-time feedback of the magnification can be realized, which is convenient for the precise detection of the industrial camera 440.

[0048] 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 them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A stereomicroscope, characterized in that, It includes an eyepiece (100), an interpupillary distance adjustment component (200), an optical hinge group (300), a prism steering group (400), a distributed anti-photographing optical path component, and a continuously variable magnification objective lens group (600); The eyepiece (100) is connected to the interpupillary distance adjustment component (200), the continuously variable magnification objective lens group (600) is arranged above the object to be observed, the prism steering group (400) is connected to the continuously variable magnification objective lens group (600), and both 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 anti-photographing 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 continuously variable magnification objective lens group (600) to expand the beam aperture. The positive lens (520) is arranged between the optical hinge group (300) and the prism steering group (400) to contract the beam aperture. The optical hinge group (300) is successively 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 beam aperture. The positive lens group (540) is arranged between the first right-angle prism (310) and the third right-angle prism (330) to contract the beam aperture.

2. The stereomicroscope according to claim 1, characterized in that, The prism steering group (400) includes a beam splitter prism seat (410), a beam splitter prism (420), a camera optical path tube (430), and an industrial camera (440); A first through hole is arranged vertically at the bottom of the beam splitter prism seat (410), a second through hole is arranged vertically at the top of the beam splitter prism seat (410), a third through hole is arranged horizontally at the bottom of the beam splitter prism seat (410). The bottom of the beam splitter prism seat (410) is connected to the continuously variable magnification objective lens group (600). The beam splitter prism (420) is fixed in the beam splitter prism seat (410) to receive the beam of the continuously variable magnification objective lens group (600) and split the beam in the directions of the second through hole and the third through hole. One end of the camera optical path tube (430) is connected to the third through hole of the beam splitter prism (420), and the other end of the camera optical path tube (430) is connected to the industrial camera (440). The negative lens group (510) is fixed in the first through hole, and the optical axis of the negative lens group (510) coincides with the beam.

3. The stereomicroscope according to claim 2, characterized in that, The negative lens group (510) includes a first lens and a second lens arranged at intervals. 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.

4. The stereomicroscope according to claim 3, characterized in that, The stereomicroscope further includes a positive lens mounting seat (521); The bottom of the positive lens mount (521) is connected to the beam splitter prism mount (410), the top of the positive lens mount (521) is connected to the optical hinge group (300), the positive lens mount (521) is provided with a mounting hole penetrating in the vertical direction, the positive lens (520) is disposed in the mounting hole, and the mounting hole is coaxially arranged with the first through hole.

5. The stereomicroscope according to claim 3, characterized in that, The optical hinge group (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, the other side of the first rotating body (350) is connected to the interpupillary distance adjusting assembly (200), one side of the second rotating body (360) is rotatably arranged on the hinge seat (340) along a second direction, the other side of the second rotating body (360) is connected to the continuously variable objective lens group (600), the first direction and the second direction are parallelly arranged, the first rotating body (350) and the second rotating body (360) are in transmission connection, the first right-angled prism (310) is disposed in the first rotating body (350), the second right-angled prism (320) is disposed in the second rotating body (360), the third right-angled prism (330) is disposed in the hinge seat (340), the second right-angled prism (320) is configured to reflect the object image of the continuously variable objective lens group (600) to the third right-angled prism (330), the third right-angled prism (330) is configured to reflect the object image to the first right-angled prism (310), and the first right-angled prism (310) is configured to reflect the object image to the interpupillary distance adjusting assembly (200).

6. The stereomicroscope according to claim 2, characterized in that, The camera optical path tube (430) is hollow, and a lens group (431) is disposed in the camera optical path tube (430); The lens group (431) is configured to be able to adjust the focal length and the beam aperture 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 a reverse camera optical path assembly.

7. The stereomicroscope according to claim 6, characterized in that, A lens barrel (432) is further disposed in the camera optical path tube (430), the lens barrel (432) is slidably arranged in the camera optical path tube (430) along the axial direction of the camera optical path tube (430), and the lens group (431) is disposed in the lens barrel (432).

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

9. The stereomicroscope according to claim 8, wherein The combined total focal length formed by the cooperation of the distributed anti-reflection optical path component with the eyepiece (100), the interpupillary 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 be 175 mm to 180 mm.

10. The entity microscope according to claim 2, characterized in that, The entity microscope further includes a magnification feedback group (700), and both 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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