CN215687695U - Dual-waveband zooming oral scanning micro-endoscope optical system - Google Patents
Dual-waveband zooming oral scanning micro-endoscope optical system Download PDFInfo
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- CN215687695U CN215687695U CN202120558588.8U CN202120558588U CN215687695U CN 215687695 U CN215687695 U CN 215687695U CN 202120558588 U CN202120558588 U CN 202120558588U CN 215687695 U CN215687695 U CN 215687695U
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- 230000003287 optical effect Effects 0.000 title claims abstract description 28
- 230000005499 meniscus Effects 0.000 claims abstract description 17
- 230000001360 synchronised effect Effects 0.000 claims abstract description 10
- 238000003745 diagnosis Methods 0.000 abstract description 7
- 229960001957 stomatological preparations Drugs 0.000 abstract 1
- 210000000214 mouth Anatomy 0.000 description 11
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 210000004400 mucous membrane Anatomy 0.000 description 3
- 210000001519 tissue Anatomy 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 231100000915 pathological change Toxicity 0.000 description 1
- 230000036285 pathological change Effects 0.000 description 1
- 230000001575 pathological effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000004621 scanning probe microscopy Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Abstract
The utility model discloses a dual-waveband zooming oral scanning micro-endoscope optical system, and relates to the technical field of optics; the device comprises a front fixed group, a zoom group, a compensation group, an aperture diaphragm and a rear fixed group which are sequentially arranged from front to back along the direction of an optical axis; the front fixing group comprises a front cemented lens group and a front meniscus lens; the variable power group comprises a fourth lens, a fifth lens and a variable power cemented lens group; the compensation group comprises an eighth lens and a compensation cemented lens group; the rear fixed group comprises a rear fixed first cemented lens group, a thirteenth lens and a rear fixed second cemented lens group; the zooming group and the compensation group are positive group compensation structures in mechanical compensation; zooming and zooming can be realized by synchronous far-away or synchronous close of the zooming group and the compensation group. The utility model can not only see the outside of the tooth, but also detect the inside of the tooth, is convenient to operate, monitors in real time and can greatly improve the efficiency of stomatological diagnosis and treatment.
Description
Technical Field
The utility model relates to the technical field of optics, in particular to a dual-waveband zooming oral scanning micro-endoscope optical system.
Background
Early tooth protection is particularly important, decayed teeth are generated below the surface layer of the teeth at the earliest time, if not discovered as early as possible, the damage depth of the teeth is gradually deepened along with mineral loss, the teeth can not be cured and can only be repaired, and an oral endoscope is necessary equipment for dentists in the diagnosis and treatment process and can observe the oral problems of patients. However, compared with foreign brand products, the traditional oral endoscope detection system in China has the advantages of single function, low resolution, poor contrast, capability of observing the pathological changes on the surface of the oral cavity, incapability of observing the internal conditions of the teeth, capability of scanning by X rays, incapability of displaying the X rays in real time, interference in image overlapping, radiation of the X rays, harm to human bodies, incapability of deeply and clearly reading mucosal tissue cells and fine structures, and incapability of observing the mucosal tissue cells and the fine structures in the oral cavity in real time due to the fact that the mucosal samples are required to be extracted if the fine structures in the oral cavity are wanted to be observed, and the mucosal samples are required to be observed under an inverted microscope, so that the real-time observation is impossible, and time and labor are wasted. Therefore, an oral endoscope with two wave bands, which can be used for household tooth protection, early prevention and detection of dental caries pathological condition changes, tooth mineral substance tracking monitoring and other fields, is lacked at present.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a dual-waveband zooming oral cavity scanning micro-endoscope optical system, which solves the problems in the prior art, can not only see the outside of a tooth, but also detect the inside of the tooth, is convenient to operate, can monitor in real time, and can greatly improve the efficiency of diagnosis and treatment in the department of stomatology.
In order to achieve the purpose, the utility model provides the following scheme:
the utility model provides a dual-waveband zooming oral scanning micro-endoscope optical system, which comprises a front fixed group, a zooming group, a compensation group, an aperture diaphragm and a rear fixed group which are sequentially arranged from front to back along the direction of an optical axis; the front fixed group comprises a front cemented lens group and a front meniscus lens, the front cemented lens group is a positive focal power lens group, the front meniscus lens is a positive meniscus lens, and the convex surface of the front meniscus lens faces the object space; the zoom group comprises a fourth lens, a fifth lens and a zoom cemented lens group, the fourth lens and the fifth lens are single lenses with negative focal power, and the zoom cemented lens group is a positive focal power lens group; the compensation group comprises an eighth lens and a compensation cemented lens group, the eighth lens is a single lens with positive focal power, and the compensation cemented lens group is a positive focal power lens group; the rear fixed group comprises a rear fixed first cemented lens group, a thirteenth lens and a rear fixed second cemented lens group, the rear fixed first cemented lens group is a negative focal power lens group, the thirteenth lens is a positive focal power single lens, and the rear fixed second cemented lens group is a positive focal power lens group; the zooming group and the compensation group are positive group compensation structures in mechanical compensation; zooming and zooming can be realized by synchronous far-away or synchronous close of the zooming group and the compensation group.
Optionally, the front cemented mirror group includes a first lens and a second lens, the first lens is a single lens with positive focal power, and the second lens is a single lens with negative focal power; the variable-power cemented lens group comprises a sixth lens and a seventh lens, wherein the sixth lens and the seventh lens are negative meniscus lenses, and the concave surfaces of the sixth lens and the seventh lens face the object space; the compensating cemented mirror group comprises a ninth lens and a tenth lens, and the ninth lens and the tenth lens are single lenses with positive focal power; the rear fixed first cemented lens group comprises an eleventh lens and a twelfth lens, the eleventh lens and the twelfth lens are both single lenses with negative focal power, the rear fixed second cemented lens group comprises a fourteenth lens and a fifteenth lens, the fourteenth lens is a single lens with positive focal power, and the fifteenth lens is a single lens with negative focal power.
Optionally, in a wide-angle state of visible light, the working distance is 50 mm; in the infrared double telecentric state, the working distance is 10 mm.
Optionally, the front fixing group is disposed in a first barrel, and the length of the first barrel is 20 mm; the zooming group and the compensation group are arranged in a second lens barrel, and the length of the second lens barrel is 73 mm; the rear fixing group is arranged in a third lens cone, the length of the third lens cone is 28mm, and the rear intercept is 9.2 mm; the first lens barrel, the second lens barrel and the third lens barrel are connected in sequence through threads.
Optionally, the zoom group moves linearly in the second barrel, and the movement amount is 1-25 mm; the compensation group moves in the second lens cone in a nonlinear way, and the movement amount is 0.2-44 mm; the interval between the tenth lens and the aperture diaphragm is 1.5-22 mm.
Optionally, the visible light operating band is set to 0.486-0.656 μm, and the infrared light operating band is 860 μm.
Compared with the prior art, the utility model has the following technical effects:
the system adopts a four-component zoom mode, achieves the effect from a wide angle to double telecentricity by moving the zoom group and the compensation group, is connected with the optical fiber and the cold light source, can realize that the visible light can see the whole outline of the oral cavity at a wide angle, the visible light can see mucous membrane cells of the oral cavity at the double telecentricity, and the infrared light can see the inside of the hard tissue of the teeth at the double telecentricity.
The utility model adopts a mechanical compensation method, and because the system is an optical system with large visual field and large multiplying power, and the required light transmission aperture of a lens and the small secondary spectrum are considered, a thin and long positive group compensation zooming structure is selected and comprises a front fixed group, a zooming group, a compensation group and a rear fixed group. By adjusting the zoom group and the compensation group, the zoom group moves linearly, and the compensation group moves nonlinearly, so that the zoom effect is achieved, and the change from a large view field to double telecentricity is realized. The surface types of the adopted lenses are all spherical surfaces or planes, and no aspheric surface is introduced, so that the processing and adjusting difficulty is reduced, and the cost is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic view of a dual-band zoom oral scanning endomicroscopy optical system according to the present invention;
FIG. 2 is a schematic view of the optical path of the optical system of the dual-band zoom oral scanning endomicroscopy in one working state according to the present invention;
FIG. 3 is a schematic diagram of an optical path of a dual-band zoom oral scanning endomicroscopy optical system in a second operating state according to the present invention;
FIG. 4 is a schematic diagram of an optical path of a dual-band zoom oral scanning endomicroscopy optical system in a third working state according to the present invention;
wherein 100 is a dual-waveband zooming oral scanning micro-endoscope optical system; 1 is a front fixed group; 2 is a zoom group; 3 is a compensation group; 4 is an aperture diaphragm; 5 is a rear fixed group; 6 is an object plane; 7 is an image plane; 1.1 is a first lens; 1.2 is a second lens; 1.3 is a front meniscus lens; 2.1 is a fourth lens; 2.2 is a fifth lens; 2.3 is a sixth lens; 2.4 is a seventh lens; 3.1 is the eighth lens; 3.2 is the ninth lens; 3.3 is the tenth lens; 5.1 is an eleventh lens; 5.2 is a twelfth lens; 5.3 is a thirteenth lens; 5.4 is the fourteenth lens; and 5.5 is a fifteenth lens.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
The utility model aims to provide a dual-waveband zooming oral cavity scanning micro-endoscope optical system, which solves the problems in the prior art, can not only see the outside of a tooth, but also detect the inside of the tooth, is convenient to operate, can monitor in real time, and can greatly improve the efficiency of diagnosis and treatment in the department of stomatology.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Example 1
Referring to fig. 1 to 4, the dual-band zoom oral scanning microscopy endoscope optical system 100 provided in this embodiment includes a front fixed group 1, a zoom group 2, a compensation group 3, an aperture stop 4, and a rear fixed group 5, which are sequentially arranged from front to rear along an optical axis direction, wherein an object plane 6 is located on a side close to the front fixed group 1, and an image plane 7 is located on a side close to the rear fixed group 5; the front fixed group 1 can be combined with a plurality of groups behind to adopt a positive group compensation mode of mechanical compensation, and the object space view field is changed by changing the corresponding air space to implement zooming; the zooming group 2 and the compensation group 3 perform zooming and zooming in a synchronous far-away or synchronous close mode so as to realize the function from wide angle to double telecentricity; the utility model can realize the observation of the general oral cavity in the wide-angle state of visible light; when the working wave band is changed into infrared light, the inside of the hard tissue of the tooth body can be observed; the defect that the interior of the tooth cannot be detected while the exterior of the tooth is seen in the dental diagnosis and treatment process is well overcome, and the dental diagnosis and treatment efficiency is greatly improved. Specifically, the front fixed group 1 comprises a front cemented lens group and a front meniscus lens 1.3, the front cemented lens group is a positive focal power lens group, the front meniscus lens 1.3 is a positive meniscus lens, the convex surface of the front meniscus lens faces the object space, the front cemented lens group comprises a first lens 1.1 and a second lens 1.2, the first lens 1.1 is a single lens with positive focal power, and the second lens 1.2 is a single lens with negative focal power; the zoom group 2 comprises a fourth lens 2.1, a fifth lens 2.2 and a zoom cemented lens group, the fourth lens 2.1 and the fifth lens 2.2 are single lenses with negative focal power, the zoom cemented lens group is a positive focal power lens group, the zoom cemented lens group comprises a sixth lens 2.3 and a seventh lens 2.4, the sixth lens 2.3 and the seventh lens 2.4 are negative meniscus lenses, and the concave surface of the sixth lens 2.3 and the concave surface of the seventh lens 2.4 face the object space; the compensation group 3 comprises an eighth lens 3.1 and a compensation cemented lens group, the eighth lens 3.1 is a single lens with positive focal power, the compensation cemented lens group is a positive focal power lens group, the compensation cemented lens group comprises a ninth lens 3.2 and a tenth lens 3.3, and the ninth lens 3.2 and the tenth lens 3.3 are single lenses with positive focal power; the rear fixed group 5 comprises a rear fixed first cemented lens group, a thirteenth lens group 5.3 and a rear fixed second cemented lens group, the rear fixed first cemented lens group is a negative focal power lens group, the thirteenth lens group is a positive focal power single lens, the rear fixed second cemented lens group is a positive focal power lens group, the rear fixed first cemented lens group comprises an eleventh lens 5.1 and a twelfth lens 5.2, the eleventh lens 5.1 and the twelfth lens 5.2 are negative focal power single lenses, the rear fixed second cemented lens group comprises a fourteenth lens 5.4 and a fifteenth lens 5.5, the fourteenth lens 5.4 is a positive focal power single lens, and the fifteenth lens 5.5 is a negative focal power single lens; the zooming group 2 and the compensation group 3 are positive group compensation structures in mechanical compensation; the zoom oral cavity endomicroscopy optical system can realize the zoom and zoom change through the synchronous distance or synchronous approach of the zoom group 2 and the compensation group 3, thereby realizing the function from wide angle to double telecentricity.
In this embodiment, the working band of visible light is set to 0.486-0.656 μm, and the working band of infrared light is 860 μm. When the system is from double telecentric to large-view-field image space telecentric, the field angle range is 0-90 degrees. In a double telecentric system, the magnification range can be from 10 to 60.
In the embodiment, when the working wave band is visible light, mechanical compensation is performed by moving the zoom group 2 and the compensation group 3, the working distance in a wide-angle state is 50mm, the whole oral cavity can be clearly seen through observation, the working distance in a double-telecentric state is 10mm, and mucosal cells in the oral cavity can be clearly seen; when the working waveband of the zoom lens is infrared light, the working distance of the double telecentric state is 10mm, and the interior of the hard tissue of the tooth can be seen at the moment.
In the embodiment, the system has large depth of field and long focal depth, and the object space and image space telecentricity is less than 0.02 degrees in double telecentricity, so that errors caused by inaccurate positions can be eliminated.
In this embodiment, all the surfaces of the lens group are spherical or planar.
Further, in the present embodiment, the front fixing group 1 is disposed in the first barrel, and the length of the first barrel is 20 mm; the zooming group 2 and the compensation group 3 are arranged in a second lens barrel, and the length of the second lens barrel is 73 mm; the rear fixing group is arranged in a third lens cone, the length of the third lens cone is 28mm, the rear intercept is 9.2mm, and adjacent lens cones are connected through threads. The variable-power lens group 2 and the compensation lens group 3 are controlled to move back and forth through the motor, a cam curve is designed, the variable-power lens group 2 and the compensation lens group 3 are fixed on the motor through pins, the two lens groups are linked to achieve the zooming effect, and when the cam curve is designed, gears can be fixed according to different angles of view, so that the multiplying power is constant, and the requirement of oral diagnosis and treatment is met. The zoom group 2 makes linear movement in the second lens cone, and the movement amount is 1-25 mm; the compensation group 3 moves in the second lens cone in a nonlinear way, and the moving amount is 0.2-44 mm; when the compensation group 3 moves back and forth, the distance between the tenth lens 3.3 and the aperture stop 4 is increased or decreased, the maximum distance being 22mm and the minimum distance being 1.5 mm. The movement of the zoom group 2 and the compensation group 3 is in a stepped movement mode, and the three-step movement gear is included.
In the description of the present invention, it should be noted that the terms "center", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The principle and the implementation mode of the utility model are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the utility model; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the utility model.
Claims (6)
1. A dual-waveband zoom oral scanning micro-endoscope optical system is characterized in that: the device comprises a front fixed group, a zoom group, a compensation group, an aperture diaphragm and a rear fixed group which are sequentially arranged from front to back along the direction of an optical axis; the front fixed group comprises a front cemented lens group and a front meniscus lens, the front cemented lens group is a positive focal power lens group, the front meniscus lens is a positive meniscus lens, and the convex surface of the front meniscus lens faces the object space; the zoom group comprises a fourth lens, a fifth lens and a zoom cemented lens group, the fourth lens and the fifth lens are single lenses with negative focal power, and the zoom cemented lens group is a positive focal power lens group; the compensation group comprises an eighth lens and a compensation cemented lens group, the eighth lens is a single lens with positive focal power, and the compensation cemented lens group is a positive focal power lens group; the rear fixed group comprises a rear fixed first cemented lens group, a thirteenth lens and a rear fixed second cemented lens group, the rear fixed first cemented lens group is a negative focal power lens group, the thirteenth lens is a positive focal power single lens, and the rear fixed second cemented lens group is a positive focal power lens group; the zooming group and the compensation group are positive group compensation structures in mechanical compensation; zooming and zooming can be realized by synchronous far-away or synchronous close of the zooming group and the compensation group.
2. The dual-band zoom oral scanning endomicroscopy optical system of claim 1, wherein: the front cemented lens group comprises a first lens and a second lens, the first lens is a single lens with positive focal power, and the second lens is a single lens with negative focal power; the variable-power cemented lens group comprises a sixth lens and a seventh lens, wherein the sixth lens and the seventh lens are negative meniscus lenses, and the concave surfaces of the sixth lens and the seventh lens face the object space; the compensating cemented mirror group comprises a ninth lens and a tenth lens, and the ninth lens and the tenth lens are single lenses with positive focal power; the rear fixed first cemented lens group comprises an eleventh lens and a twelfth lens, the eleventh lens and the twelfth lens are both single lenses with negative focal power, the rear fixed second cemented lens group comprises a fourteenth lens and a fifteenth lens, the fourteenth lens is a single lens with positive focal power, and the fifteenth lens is a single lens with negative focal power.
3. The dual-band zoom oral scanning endomicroscopy optical system of claim 2, wherein: when the device is in a wide-angle state of visible light, the working distance is 50 mm; in the infrared double telecentric state, the working distance is 10 mm.
4. The dual-band zoom oral scanning endomicroscopy optical system of claim 2, wherein: the front fixing group is arranged in a first lens barrel, and the length of the first lens barrel is 20 mm; the zooming group and the compensation group are arranged in a second lens barrel, and the length of the second lens barrel is 73 mm; the rear fixing group is arranged in a third lens cone, the length of the third lens cone is 28mm, and the rear intercept is 9.2 mm; the first lens barrel, the second lens barrel and the third lens barrel are connected in sequence through threads.
5. The dual-band zoom oral scanning endomicroscopy optical system of claim 4, wherein: the zooming group moves linearly in the second lens cone, and the moving amount is 1-25 mm; the compensation group moves in the second lens cone in a nonlinear way, and the movement amount is 0.2-44 mm; the interval between the tenth lens and the aperture diaphragm is 1.5-22 mm.
6. The dual-band zoom oral scanning endomicroscopy optical system of claim 3, wherein: the working waveband of visible light is set to be 0.486-0.656 mu m, and the working waveband of infrared light is 860 mu m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120558588.8U CN215687695U (en) | 2021-03-18 | 2021-03-18 | Dual-waveband zooming oral scanning micro-endoscope optical system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120558588.8U CN215687695U (en) | 2021-03-18 | 2021-03-18 | Dual-waveband zooming oral scanning micro-endoscope optical system |
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| CN215687695U true CN215687695U (en) | 2022-02-01 |
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| CN202120558588.8U Expired - Fee Related CN215687695U (en) | 2021-03-18 | 2021-03-18 | Dual-waveband zooming oral scanning micro-endoscope optical system |
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- 2021-03-18 CN CN202120558588.8U patent/CN215687695U/en not_active Expired - Fee Related
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