CN111897119A - Folding hinge binocular operation microscope optical system - Google Patents
Folding hinge binocular operation microscope optical system Download PDFInfo
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- CN111897119A CN111897119A CN202010772095.4A CN202010772095A CN111897119A CN 111897119 A CN111897119 A CN 111897119A CN 202010772095 A CN202010772095 A CN 202010772095A CN 111897119 A CN111897119 A CN 111897119A
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- lens group
- group
- prism
- optical system
- zoom
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B21/00—Microscopes
- G02B21/0004—Microscopes specially adapted for specific applications
- G02B21/0012—Surgical microscopes
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B17/00—Systems with reflecting surfaces, with or without refracting elements
- G02B17/02—Catoptric systems, e.g. image erecting and reversing system
- G02B17/04—Catoptric systems, e.g. image erecting and reversing system using prisms only
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B21/00—Microscopes
- G02B21/02—Objectives
- G02B21/025—Objectives with variable magnification
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B21/00—Microscopes
- G02B21/06—Means for illuminating specimens
- G02B21/08—Condensers
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/04—Prisms
Abstract
The invention discloses a folding hinge binocular surgical microscope optical system, which mainly relates to the technical field of microscope optical systems and comprises an eyepiece lens group, a pitching adjusting lens group, a zoom lens group and an objective lens group, wherein the eyepiece lens group, the pitching adjusting lens group, the zoom lens group and the objective lens group are sequentially arranged along a light path; the eyepiece lens group is used for human eye imaging; the pitching adjusting mirror group comprises a first right-angle prism, an eye objective, a first roof prism, a second right-angle prism and a second roof prism which are sequentially arranged along a light path; the zooming lens group comprises a zooming rear group, a compensating lens group, a zooming group and a zooming front group which are sequentially arranged; the objective lens group is used for collecting an image of an object. The embodiment of the invention can meet the requirements of different working distances, reduce the prolonged operation time brought by replacing a large objective lens and facilitate the observation of dental plaque and irregular teeth for doctors.
Description
Technical Field
The invention relates to the technical field of microscope optical systems, in particular to a folding hinge binocular surgical microscope optical system.
Background
In the dental surgery for the oral cavity, the complicated structure in the root canal of the patient needs to be observed, so that a dental operation microscope is needed to help the doctor to separate the root canal or remove calcifications; however, since the size of calcifications or foreign bodies in the root canal in the oral cavity of a patient varies widely, for example, from 500 to 0.1mm, the microscope needs to have a strong zoom capability to accommodate foreign bodies of different sizes.
In the prior art, the invention with application number CN02260210.0 discloses an eyepiece tube with an eyepiece connected to a half-pentagon prism holder at an angle of 45 degrees, the half-pentagon prism holder vertically connected to a Proru prism holder, the half-pentagon prism holder and the Proru prism holder are respectively provided with a half-pentagon prism and a Proru prism, an objective lens cover is connected to the lower part of the Proru prism holder, the upper and lower ends of the objective lens cover are respectively provided with an objective lens rear group and an objective lens front group, a zoom objective lens group and a compensation objective lens group are arranged in the middle of the objective lens rear group and the objective lens front group, both of which can be rotated by a handwheel to continuously and relatively move to form a microscope main body, the main body is connected to a focusing bracket assembly, the focusing bracket assembly is provided with a handwheel, the handwheel is rotated to move the microscope main body up and down along the focusing bracket assembly to achieve coarse focusing, the eyepiece can rotate 360 degrees, the price is reduced by more than half compared with a binocular microscope, and the camera can be connected for shooting, or the relevant interfaces of a computer and a television can be connected, so that images can be watched on a television screen or a computer screen. The invention with the application number of CN03220266.0 discloses a simple continuous zoom device, which comprises a fixed component and a sliding component, wherein the fixed component is a fixed optical component fixed in the position opposite to a microscope eyepiece group, the sliding component is a zoom optical component capable of axially moving relative to the fixed component, and the fixed optical component and the zoom optical component are positioned in the same optical path.
However, the prior art provides only a concept of variable magnification, and does not provide a specific implementation of a variable magnification optical system.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a folding hinge binocular surgical microscope optical system, which solves the problems in the prior art.
In order to achieve the purpose, the invention is realized by the following technical scheme: the invention provides a folding hinge binocular surgical microscope optical system, which comprises an eyepiece lens group, a pitching adjusting lens group, a zoom lens group and an objective lens group, wherein the eyepiece lens group, the pitching adjusting lens group, the zoom lens group and the objective lens group are sequentially arranged along a light path;
the eyepiece lens group is used for human eye imaging;
the pitching adjusting mirror group comprises a first right-angle prism, an eye objective, a first roof prism, a second right-angle prism and a second roof prism which are sequentially arranged along a light path;
the zoom lens group comprises a zoom rear group, a compensation lens group, a zoom group and a zoom front group which are sequentially arranged, wherein the zoom rear group, the zoom group and the zoom front group are positive lenses;
the system further comprises a reflector and a fluorescent module, wherein the fluorescent module comprises a collimating lens with an LED light source, and the reflector reflects the fluorescent light emitted by the fluorescent module to a light emergent surface of the objective lens group facing the zoom lens group.
And a steering prism is arranged between the ocular lens group and the zoom lens group, and the steering prism steers the light output by the zoom lens group and inputs the light into the ocular lens group.
The steering prism is a pentagonal prism.
An internal beam splitter prism is arranged between the steering prism and the fluorescent light filter, an external beam splitter prism is arranged between the steering prism and the pitching adjusting mirror group, and the internal beam splitter prism is positioned on an optical axis of the zoom mirror group and splits light into a light path of the camera.
And a fluorescent light filter is also arranged between the zoom lens group and the built-in beam splitter prism.
An aperture diaphragm is arranged on an optical axis between the fluorescent light filter and the zoom lens group.
The objective lens group is used for collecting images of objects, the caliber of the objective lens group is larger than that of the zoom lens group, and the objective lens group and the zoom lens group are arranged in a shared optical axis mode.
The objective lens group consists of a first cemented lens, a second cemented lens and a third cemented lens.
The pitching adjusting mirror group forms a folding hinge part, 2 roof prisms and 2 right-angle prisms are used, an inclined 30-degree prism is changed into a pentagon prism, and the purpose is to enable an eyepiece to be in a horizontal state all the time, an optical device of the folding hinge part is sequentially a first right-angle prism, an eye objective, a first roof prism, a second right-angle prism and a second roof prism, and the layout is such that the horizontal direction and the vertical direction of an image surface are kept unchanged all the time when the folding hinge does pitching motion, and observation of the eyepiece is not influenced. The folding hinge part works in a specific working principle that both a rotating shaft A and a rotating shaft B can rotate, and the rotating angle relation between the rotating shaft A and the rotating shaft B meets the following requirements: the rotation angle of the rotating shaft A is theta, and the rotation angle of the rotating shaft B is negative theta, so that the eyepiece is always in a horizontal state when the folding hinge does pitching motion.
The invention has the following beneficial effects:
the invention relates to a base of a folding hinge binocular surgical microscope optical system.
(1) By applying the embodiment of the invention, the continuous zoom lens group is formed by the zoom rear group positive lens, the zoom group positive lens and the zoom front group positive lens which are sequentially arranged, so that continuous zooming can be realized, and the zoom range is 200-450 mm.
(2) The embodiment of the invention can meet the requirements of different working distances and reduce the prolonged operation time caused by replacing a large objective lens.
(3) According to the practical requirements of the oral cavity, the maximum view field diameter of the microscope is larger than or equal to 100 mm; is convenient for doctors to observe dental plaque and irregular teeth.
(4) The embodiment of the invention also adds a fluorescence function, thereby being further convenient for doctors to observe.
Drawings
Fig. 1 is a schematic structural diagram provided in an embodiment of the present invention.
1-ocular lens group; 2-pitching adjusting lens group; 3-zoom lens group; 4-objective lens group; 5-a right-angle prism I; 6-an objective lens; 7-a roof prism I; 8-a right-angle prism II; 9-roof prism II; 10-zoom group; 11-a compensating lens group; 12-zoom group; 13-group before zooming; 14-a mirror; 15-a fluorescent module; 16-an LED light source; 17-a collimating lens; 18-a turning prism; 19-built-in beam splitter prism; 20-external beam splitter prism; 21-a camera; 22-a fluorescent filter; 23-aperture diaphragm; 24-a cemented lens one; 25-a cemented lens two; 26-cemented lens three.
Detailed Description
In order to make the objects, 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 embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the system includes: an ocular lens group 1, a pitching adjusting lens group 2, a zoom lens group 3 and an objective lens group 4 which are arranged along an optical path in sequence;
the eyepiece lens group 1 is used for human eye imaging;
the pitching adjusting mirror group 2 comprises a first right-angle prism 5, an eye objective 6, a first roof prism 7, a second right-angle prism 8 and a second roof prism 9 which are sequentially arranged along a light path;
the zoom lens group 3 comprises a zoom rear group 10, a compensation lens group 11, a zoom group 12 and a zoom front group 13 which are sequentially arranged, wherein the zoom rear group 10, the zoom group 12 and the zoom front group 13 are all positive lenses;
the objective lens group 4 is used for collecting an image of an object;
the system further comprises a reflective mirror 14 and a fluorescent module 15, wherein the fluorescent module 15 comprises a collimating lens 17 with an LED light source 16, and the reflective mirror 14 reflects the fluorescent light emitted by the fluorescent module 15 to a light-emitting surface of the objective lens group 4 facing the zoom lens group 3.
A steering prism 18 is further arranged between the eyepiece lens group 1 and the zoom lens group 3, and the steering prism 18 steers the light output by the zoom lens group 3 and inputs the light into the eyepiece lens group 1.
The turning prism 18 is a pentagonal prism.
An internal beam splitter prism 19 is arranged between the steering prism 18 and the zoom lens group 3, an external beam splitter prism 20 is arranged between the steering prism 18 and the pitching adjusting lens group 2, and the internal beam splitter prism 19 is located on the optical axis of the zoom lens group 3 and splits light into the light path of a camera 21.
A fluorescent light filter 22 is also arranged between the variable power lens group 3 and the built-in beam splitter prism 19.
An aperture diaphragm 23 is further arranged on an optical axis between the fluorescent light filter 22 and the zoom lens group 3.
The aperture of the objective lens group 4 is larger than that of the zoom lens group 3, and the objective lens group 4 and the zoom lens group 3 are arranged in a coaxial manner.
The objective lens group 4 consists of a first cemented lens 24, a second cemented lens 25 and a third cemented lens 26, and the equivalent Focal Length of the objective lens group 4 is EFLa (Effective Focal Length) when the working distance is 200-455 mm; the variable-magnification coefficient of the variable-magnification group is t, 0.4-2.4.
Total magnification β ═ EFLc/EFLa ═ t 12.5
According to the working distance, the focal length EFLa of the objective lens assembly satisfies the range EFLa (minimum) less than or equal to 1.9 × EFLa (maximum), and in the embodiment of the present invention, the focal length of the objective lens assembly is in the range of 280-.
EFlc of the equivalent focal length of the objective lens 6 satisfies the range of 170mm to 185 mm.
Example 1
Table 1 is a table of optical design parameters of each lens used in example 1 of the present invention, as shown in table 1,
TABLE 1
As shown in Table 1, the thickness interval of No. 4 can be adjusted according to the working distance, the adjustment range is 1.5-21mm, the thickness of No. 14 is adjusted according to the variable magnification ratio, the adjustment range is 1.3-43mm, the thickness of No. 18 is adjusted according to the variable magnification ratio, the adjustment range is 2-25.8mm, the thickness of No. 20 is adjusted according to the variable magnification ratio, and the adjustment range is 1.5-27 mm.
It is emphasized that in the order of the light reflected by the object proceeding in the lens group, in table 1, the air layer thickness between the biconcave lens, which is one of the cemented lenses, and the distance between the biconcave lens and the object is numbered 1. The number 2 is a parameter of the biconcave lens, and the surface type means that the curved surface of the biconcave lens is a spherical surface, the curvature radius of the biconcave lens is-98.772, the thickness of the central axis of the biconcave lens is 4mm, and the refractive index of the material is 1.7. The adhesive between the biconcave lens and the plano-convex lens of the cemented lens one of order 3, the curvature radius of the adhesive is 85.212, the thickness is 11m, the refractive index is 1.9, the order 4 is the plano-convex lens in the cemented lens one 24, the convex surface is the light incident surface and faces the biconcave lens, and the curvature radius is 370.652 mm; the light-emitting surface is a plane; the thickness of the plane convex lens is variable, which means that the thickness of the plane convex lens can be adjusted according to actual requirements.
Similarly, the numbers 5, 6 and 7 are the optical parameters of the plano-convex lens, the adhesive and the concave lens in the cemented lens two 25 in sequence. The lens of the serial number 5 is a plano-convex lens, the plane of which is a light incident surface and faces the first cemented lens 24, and the convex surface of which is a light emergent surface and faces the third cemented lens 26; number 7 is a concave lens, the light incident surface of which is concave toward the plano-convex lens, and the light emergent surface of which is convex toward the cemented lens III 26.
The third cemented lens 26 includes, from bottom to top: a plano-concave lens with serial number 8, an adhesive glue with serial number 9 and a biconvex lens with serial number 10, wherein the plane of the plano-convex lens is a light incident surface facing to a second cemented lens 25; the concave surface of the plano-convex lens is a light-emitting surface and faces the biconvex lens.
Air layer between the cemented lens three 26 of No. 11 and the group 3 before magnification change.
The variable power group 12 sequentially comprises from bottom to top: plano-convex lens serial No. 15, adhesive glue serial No. 16, and biconcave lens serial No. 17. The plane of the plano-convex lens with the serial number of 15 is a light incident surface and faces to the zoom front group; the convex surface is a light-emitting surface and faces to a biconcave lens with the serial number of 17.
The compensating mirror group 11 sequentially comprises from bottom to top: a plano-concave lens numbered 18, an adhesive glue numbered 19, and a concave lens numbered 20. The plane of the plano-convex lens is a light incident plane and faces the zoom group; the convex surface of the plano-concave lens is a light-emitting surface and faces the zooming rear group.
The aperture stop 23 is a lens numbered 24.
The fluorescent filter 22 is a lens No. 25.
It is emphasized that the thickness interval of number 4 can be adjusted according to the working distance, the adjustment range is 1.5-21mm, the thickness of number 14 is adjusted according to the variable magnification ratio, the adjustment range is 1.3-44mm, the thickness of number 17 is adjusted according to the variable magnification ratio, the adjustment range is 1.5-29mm, the thickness of number 20 is adjusted according to the variable magnification ratio, and the adjustment range is 1.5-18 mm.
Example 2
Table 2 is a table of technical performance of the optical system according to the embodiment of the present invention, as shown in table 2,
TABLE 2
| Main performance item | Design parameters |
| Working distance | 200-400mm |
| Field diameter range | 11.2-120mm |
| Total optical power (12.5X eyepiece) | 1.87X-20X |
| Variable magnification ratio | 6X(0.4X-2.4X) |
Table 3 is a table of optical design parameters of each lens used in example 2 of the present invention, as shown in table 3,
TABLE 3
It should be noted that the mirror type in example 2 of the present invention is completely identical to that in example 1, and the difference is only in specific optical parameters. Therefore, in embodiment 2, the object side surface of each lens and the arrangement manner of the lens are not described in detail herein.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. The utility model provides a folding hinge binocular operation microscope optical system, is including following the eyepiece group that the light path set gradually, every single move adjusting mirror group, zoom lens group and objective lens group, its characterized in that: a pitching adjusting lens group is arranged between the eyepiece lens group and the zoom lens group;
the eyepiece lens group is used for human eye imaging;
the pitching adjusting mirror group comprises a first right-angle prism, an eye objective, a first roof prism, a second right-angle prism and a second roof prism which are sequentially arranged along a light path;
the zooming lens group comprises a zooming rear group, a compensating lens group, a zooming group and a zooming front group which are sequentially arranged;
the objective lens group is used for collecting an image of an object.
2. The folded hinge binocular surgical microscope optical system of claim 1, wherein: the system further comprises a reflector and a fluorescent module, wherein the fluorescent module comprises a collimating lens with an LED light source, and the reflector reflects the fluorescent light emitted by the fluorescent module to a light emergent surface of the objective lens group facing the zoom lens group.
3. The folded hinge binocular surgical microscope optical system of claim 2, wherein: and a steering prism is arranged between the ocular lens group and the zoom lens group, and the steering prism steers the light output by the zoom lens group and inputs the light into the ocular lens group.
4. The folded hinge binocular surgical microscope optical system of claim 3, wherein: the steering prism is a pentagonal prism.
5. The folded hinge binocular surgical microscope optical system of claim 3, wherein: an internal beam splitter prism is arranged between the steering prism and the fluorescent light filter, an external beam splitter prism is arranged between the steering prism and the pitching adjusting mirror group, and the internal beam splitter prism is positioned on an optical axis of the zoom mirror group and splits light into a light path of the camera.
6. The folded hinge binocular surgical microscope optical system of claim 5, wherein: and a fluorescent light filter is also arranged between the zoom lens group and the built-in beam splitter prism.
7. The folded hinge binocular surgical microscope optical system of claim 6, wherein: an aperture diaphragm is arranged on an optical axis between the fluorescent light filter and the zoom lens group.
8. The folded hinge binocular surgical microscope optical system of claim 1, wherein: the aperture of the objective lens group is larger than that of the zoom lens group, and the objective lens group and the zoom lens group are arranged in a coaxial manner.
9. The folded hinge binocular surgical microscope optical system of claim 8, wherein: the objective lens group comprises a first cemented lens, a second cemented lens and a third cemented lens which are sequentially arranged along a light path.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010772095.4A CN111897119A (en) | 2020-08-04 | 2020-08-04 | Folding hinge binocular operation microscope optical system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010772095.4A CN111897119A (en) | 2020-08-04 | 2020-08-04 | Folding hinge binocular operation microscope optical system |
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| Publication Number | Publication Date |
|---|---|
| CN111897119A true CN111897119A (en) | 2020-11-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010772095.4A Withdrawn CN111897119A (en) | 2020-08-04 | 2020-08-04 | Folding hinge binocular operation microscope optical system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113946057A (en) * | 2021-10-14 | 2022-01-18 | 深圳赛陆医疗科技有限公司 | Multimode optical fiber dodging device |
| WO2022179116A1 (en) * | 2021-02-23 | 2022-09-01 | 苏州速迈医学科技股份有限公司 | Extension structure, optical system and surgical microscope |
-
2020
- 2020-08-04 CN CN202010772095.4A patent/CN111897119A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022179116A1 (en) * | 2021-02-23 | 2022-09-01 | 苏州速迈医学科技股份有限公司 | Extension structure, optical system and surgical microscope |
| CN113946057A (en) * | 2021-10-14 | 2022-01-18 | 深圳赛陆医疗科技有限公司 | Multimode optical fiber dodging device |
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Application publication date: 20201106 |
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