CN220913428U - Color comparator adopting double-high beam imaging system - Google Patents
Color comparator adopting double-high beam imaging system Download PDFInfo
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- CN220913428U CN220913428U CN202321327429.2U CN202321327429U CN220913428U CN 220913428 U CN220913428 U CN 220913428U CN 202321327429 U CN202321327429 U CN 202321327429U CN 220913428 U CN220913428 U CN 220913428U
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- 238000003384 imaging method Methods 0.000 title claims abstract description 58
- 230000003287 optical effect Effects 0.000 claims abstract description 22
- 238000012545 processing Methods 0.000 claims abstract description 10
- 230000005499 meniscus Effects 0.000 claims description 17
- 230000009977 dual effect Effects 0.000 claims 10
- 230000005540 biological transmission Effects 0.000 claims 2
- 230000004075 alteration Effects 0.000 abstract description 16
- 239000003086 colorant Substances 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 8
- 230000007547 defect Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910052573 porcelain Inorganic materials 0.000 description 2
- 238000010187 selection method Methods 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012217 deletion Methods 0.000 description 1
- 230000037430 deletion Effects 0.000 description 1
- 210000004513 dentition Anatomy 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 230000008802 morphological function Effects 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
- 210000001747 pupil Anatomy 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 230000036346 tooth eruption Effects 0.000 description 1
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Abstract
The utility model provides a color comparator adopting a double high beam imaging system, which comprises: the lighting barrel comprises a light inlet and a light outlet, a double-high beam imaging system is arranged in the lighting barrel, incident light enters the lighting barrel from the light inlet, passes through the double-high beam imaging system and then is emitted from the light outlet; the image acquisition module is arranged at the light outlet; the image acquisition module is connected with the processing unit and sends information of incident light rays to the processing unit; according to the double telecentric optical system and the corresponding color comparator, the double telecentric optical path formed by the front lens group, the diaphragm and the rear lens group is utilized, the characteristics of small imaging distortion and large depth of field are utilized, imaging data with higher color standard and resolution are obtained, more accurate colors are screened out, and the problem that the screened colors of the color comparator are inaccurate due to the limitations of imaging depth of field and imaging chromatic aberration in the prior art is solved.
Description
Technical Field
The utility model relates to the technical field of medical instruments, in particular to a colorimeter adopting a double-high beam imaging system.
Background
With the increasing importance of people on oral health, porcelain prostheses have become the first treatment mode for common diseases such as tooth defects, dentition defects or deletions of patients. The porcelain restoration is characterized by restoration of the morphological function of the tooth body, strong fracture resistance, vivid color and appearance, stable color and luster and strong wear resistance. Among them, color coordination is an important factor affecting the beauty of the teeth and the restoration. In clinic, the traditional color selection method mainly adopts artificial color selection, the artificial color selection is usually carried out by dentists through a contrast color plate, and the subjective impression of human eyes, ambient light environment and other environmental factors have great influence on the color selection result; in order to improve color selection accuracy, the color selection method in the prior art mostly adopts a color comparator to select colors, the color comparator mainly adopts a computer color selection technical principle, color data of a colorimetric plate are made into a database, and the color data of a tooth image of a patient are searched according to a color difference searching principle, but the color comparator in the prior art has the problem that the color screened by the color comparator is inaccurate due to the limitations of imaging depth of field and imaging color difference.
Disclosure of utility model
In view of the above-mentioned drawbacks of the prior art, the present utility model is to provide a color comparator using a dual-high beam imaging system, which solves the problem of inaccurate color screening caused by limitations of imaging depth of field and imaging color difference in the color comparator in the prior art.
In order to solve the above technical problems, the present utility model provides a double telecentric optical system, comprising:
A front mirror group;
the diaphragm is arranged at the focal plane position of the front mirror group;
The optical system comprises a rear lens group, a diaphragm and a front lens group, wherein the diaphragm is arranged at the object plane position of the rear lens group, the front lens group, the diaphragm and the rear lens group form a double telecentric optical path, and incident light rays sequentially pass through the front lens group, the diaphragm and the rear lens group.
As a more preferable mode, the front lens group includes a first lens and a second lens which are disposed in order along the propagation direction of the incident light.
As a more preferred way, the first lens is a planar lens, which functions to transmit light and protect other lenses.
As a more preferable mode, the second lens adopts a biconvex lens for converging incident light rays to the aperture.
As a more preferable mode, the rear lens group includes a third lens, a fourth lens and a fifth lens which are sequentially arranged along the propagation direction of the incident light.
As a more preferable mode, the third lens adopts a double-cemented lens, and the double-cemented lens is utilized to eliminate chromatic aberration of incident light, so as to ensure that the color of the light is consistent with that of the incident light.
As a more preferable mode, the double cemented lens includes a double convex lens and a double concave lens cemented together, the convex surface of the double cemented lens facing the incident direction of the incident light ray.
As a more preferable mode, the fourth lens adopts a meniscus lens, and a concave side of the meniscus lens faces an incident direction of the incident light ray.
As a more preferable mode, the fifth lens adopts a meniscus lens, the concave side of the meniscus lens faces the incident direction of the incident light, and the curvature of the concave side of the meniscus lens is larger than that of the corresponding concave side of the fourth lens.
In order to solve the technical problem, the utility model also provides a color comparator adopting the double-high beam imaging system, which comprises:
The lighting barrel comprises a light inlet and a light outlet, the double-high beam imaging system is arranged in the lighting barrel, incident light enters the lighting barrel from the light inlet, passes through the double-high beam imaging system and then is emitted from the light outlet;
The image acquisition module is arranged at the light outlet;
The image acquisition module is connected with the processing unit and transmits information of incident light rays to the processing unit.
As described above, the color comparator adopting the double-high beam imaging system has the following beneficial effects: the double telecentric optical system has excellent telecentricity, and can more accurately image thicker objects; the extremely low distortion makes the measurement more accurate; the ultra-high resolution is suitable for small-pixel cameras; meanwhile, the depth of field is larger, and a larger operability space of a user is met; the color comparator disclosed by the utility model has the advantages that the double telecentric optical system is used as an imaging component, the structure is simple, the size of the color comparator is reduced, the portability of the color comparator is increased, the operation range of the color comparator in color taking is enlarged, meanwhile, the color accuracy and the resolution of imaging are higher due to extremely low distortion and larger depth of field of the double telecentric optical system in imaging, and the color screened by the color comparator is more accurate; the color comparator adopting the double-high beam imaging system utilizes the characteristics of small imaging distortion and large depth of field of the double-telecentric light path formed by the front lens group, the diaphragm and the rear lens group, and screens out more accurate colors by acquiring imaging data with higher color standard and resolution, thereby solving the problem of inaccurate color screened out by the color comparator due to the limitations of imaging depth of field and imaging chromatic aberration in the prior art.
Drawings
FIG. 1 is a schematic diagram of a double telecentric optical system of the present utility model;
FIG. 2 is a diagram showing the field curvature/distortion associated with the double telecentric optical system of the present utility model;
FIG. 3 is a schematic diagram of the chromatic aberration of magnification of the double telecentric optical system according to the present utility model;
Fig. 4 shows an axial chromatic aberration diagram corresponding to the double telecentric optical system of the utility model.
Description of element reference numerals
1. Front mirror group
11. First lens
12. Second lens
2. Diaphragm
3. Rear-mounted mirror group
31. Third lens
32. Fourth lens
33. Fifth lens
Detailed Description
Further advantages and effects of the present utility model will become apparent to those skilled in the art from the disclosure of the present utility model, which is described by the following specific examples.
It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for the purpose of understanding and reading the disclosure, and are not intended to limit the scope of the utility model, which is defined by the appended claims, but rather by the claims, unless otherwise indicated, and unless otherwise indicated, all changes in structure, proportions, or otherwise, used by those skilled in the art, are included in the spirit and scope of the utility model. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the utility model, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the utility model may be practiced.
As shown in fig. 1, the present utility model provides a double telecentric optical system, comprising:
A front lens group 1;
A diaphragm 2, wherein the diaphragm 2 is arranged at the focal plane position of the front mirror group 1;
The rear lens group 3, the diaphragm 2 is arranged at the object plane position of the rear lens group 3, the front lens group 1, the diaphragm 2 and the rear lens group 3 form a double telecentric light path, and incident light rays sequentially pass through the front lens group 1, the diaphragm 2 and the rear lens group 3.
The double telecentric optical system has excellent telecentricity, and can more accurately image thicker objects; the extremely low distortion makes the measurement more accurate; the ultra-high resolution is suitable for small-pixel cameras; meanwhile, the depth of field is larger, and a larger operability space of a user is met.
In this embodiment, as shown in fig. 1, the front lens group 1 includes a first lens 11 and a second lens 12 sequentially disposed along a propagation direction of an incident light.
In this embodiment, as shown in fig. 1, the first lens 11 is a planar lens, and the planar lens functions to transmit light and protect other lenses.
In this embodiment, as shown in fig. 1, the second lens 12 is a biconvex lens, which is used to converge the incident light to the aperture 2; further, in this embodiment, the curvature of the convex surface of the lenticular lens facing the incident light is much smaller than that of the convex surface facing away from the incident light.
In this embodiment, as shown in fig. 1, the rear lens group 3 includes a third lens 31, a fourth lens 32, and a fifth lens 33, which are sequentially disposed along the propagation direction of the incident light.
In this embodiment, as shown in fig. 1, the third lens 31 is a double-cemented lens, and the double-cemented lens is used to eliminate chromatic aberration of incident light, so as to ensure that the color of the light is consistent with that of the incident light.
In this embodiment, as shown in fig. 1, the biconvex lens and the biconcave lens are connected by gluing, and the convex surface of the biconvex lens faces the incident direction of the incident light.
In this embodiment, as shown in fig. 1, the fourth lens 32 is a meniscus lens, and the concave side of the meniscus lens faces the incident direction of the incident light.
In this embodiment, as shown in fig. 1, the fifth lens 33 adopts a meniscus lens, the concave side of the meniscus lens faces the incident direction of the incident light, and the curvature of the concave side of the meniscus lens is greater than the curvature of the corresponding concave side of the fourth lens 32.
More specifically, in the present embodiment, the radius of curvature of the convex surface of the second lens 12 facing the incident light is 50.440mm, the radius of curvature of the surface facing away from the incident light is 405.350mm, the center thickness is 5mm, and the caliber is 26mm; the double-cemented lens consists of a biconvex lens and a biconcave lens, wherein the curvature radius of a convex surface facing one side of an incident ray is 7.700mm, the curvature radius of a middle surface is 5.714mm, the curvature radius of a convex surface facing away from one side of the incident ray is 4.36mm, the center thickness of the biconvex lens is 4.360m, the caliber is 5mm, the center thickness of the biconcave lens is 1.350mm, and the caliber is 5mm; the fourth lens 32 is a meniscus lens, the radius of curvature of the concave surface facing the incident light is 8.300mm, the radius of curvature of the convex surface facing away from the incident light is 7.460mm, the center thickness is 2mm, and the caliber is 7.7mm; the fifth lens 33 is a meniscus lens, the radius of curvature of the concave surface facing the incident light is 42.400mm, the radius of curvature of the convex surface facing away from the incident light is 9.620mm, the center thickness is 2.16mm, and the caliber is 10mm; so we can get a field curvature/distortion diagram with a maximum distortion of only 0.48% as shown in fig. 2; similarly, the optical magnification chromatic aberration corresponding to the double telecentric optical system of the embodiment is shown in fig. 3, wherein the ordinate represents the field of view, and the abscissa represents the magnitude of magnification chromatic aberration, from which we can see that the vertical axis chromatic aberration is about 0um in the 0 field of view and the 1 field of view, and the vertical axis chromatic aberration is maximum in the 0.5 field of view, and the value is about 0.7um; by the axial chromatic aberration diagram shown in fig. 4, in which the ordinate represents the pupil aperture, the different color curve pitches represent the chromatic aberration magnitudes, we can obtain that the vertical chromatic aberration of the double telecentric optical system of this embodiment under different apertures is very close, about 0.1mm, and by combining the optical magnification chromatic aberration diagram and the axial chromatic aberration diagram of this embodiment, the achromatic effect of the imaging system can be seen to be better.
In order to solve the technical problem, the utility model also provides a color comparator adopting the double-high beam imaging system, which comprises:
The lighting barrel comprises a light inlet and a light outlet, the double-high beam imaging system is arranged in the lighting barrel, incident light enters the lighting barrel from the light inlet, passes through the double-high beam imaging system and then is emitted from the light outlet;
The image acquisition module is arranged at the light outlet;
The image acquisition module is connected with the processing unit and transmits information of incident light rays to the processing unit.
The color comparator adopting the double-far-light imaging system disclosed by the utility model has the advantages that the double-telecentric optical system is used as an imaging component, the structure is simple, the size of the color comparator is reduced, the portability of the color comparator is increased, the operation range of the color comparator in color taking is enlarged, meanwhile, the color accuracy and the resolution of imaging are higher due to extremely low distortion and larger depth of field of the double-telecentric optical system in imaging, and the color screened by the color comparator is more accurate.
In this embodiment, the color comparator adopting the dual-high beam imaging system further includes an annular lamp disposed at the light inlet, so as to ensure uniformity of illumination in different directions in a large angle range, so that incident light entering the light inlet through reflection of an object to be imaged is more uniform.
In this embodiment, the color comparator adopting the dual-high beam imaging system is applied to the field of dentistry, and the color comparator based on the imaging system is used, so that teeth can be imaged rapidly and accurately, and the phenomenon of low color accuracy caused by distortion is effectively reduced. The imaging system has higher resolution and can be matched with a camera with smaller pixel size to obtain a high-resolution image. In addition, the imaging system has larger depth of field, so that the imaging system is more convenient for a user to use, has larger operable range, can effectively image in a range with larger distance from teeth, and can restore the color of the whole teeth by one-time shooting; in a further embodiment, the image acquisition module includes a tricolor photoelectric sensor, and the tricolor information of the image formed by the incident light is quantitatively transmitted to the processing unit through the tricolor photoelectric sensor, and the processing unit screens out the closest color according to preset colorimetric information.
In summary, the color comparator adopting the dual-high beam imaging system disclosed by the utility model utilizes the characteristics of small imaging distortion and large depth of field of the dual-telecentric light path formed by the front lens group 1, the diaphragm 2 and the rear lens group 3, and further screens out more accurate colors by acquiring imaging data with higher color standards and resolution, thereby solving the problem of inaccurate color screened out by the color comparator due to the limitations of imaging depth of field and imaging chromatic aberration in the prior art. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.
The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (9)
1. A color comparator employing a dual high beam imaging system, comprising:
The lighting barrel comprises a light inlet and a light outlet, a double-high beam imaging system is arranged in the lighting barrel, incident light enters the lighting barrel from the light inlet, passes through the double-high beam imaging system and then is emitted from the light outlet;
The image acquisition module is arranged at the light outlet;
The image acquisition module is connected with the processing unit and sends information of incident light rays to the processing unit;
Wherein the dual high beam imaging system comprises: a front mirror group (1); the diaphragm (2) is arranged at the focal plane position of the front lens group (1); the optical system comprises a rear mirror group (3), wherein the diaphragm (2) is arranged at the object plane position of the rear mirror group (3), the front mirror group (1), the diaphragm (2) and the rear mirror group (3) form a double telecentric optical path, and incident light rays sequentially pass through the front mirror group (1), the diaphragm (2) and the rear mirror group (3).
2. The color comparator using a dual high beam imaging system according to claim 1, wherein: the front lens group (1) comprises a first lens (11) and a second lens (12) which are sequentially arranged along the transmission direction of incident light rays.
3. The color comparator using the dual high beam imaging system according to claim 2, wherein: the first lens (11) is a planar lens.
4. The color comparator using the dual high beam imaging system according to claim 2, wherein: the second lens (12) is a biconvex lens.
5. The color comparator using a dual high beam imaging system according to claim 1, wherein: the rear lens group (3) comprises a third lens (31), a fourth lens (32) and a fifth lens (33) which are sequentially arranged along the transmission direction of incident light rays.
6. The color comparator using a dual high beam imaging system according to claim 5, wherein: the third lens (31) adopts a double-cemented lens.
7. The color comparator using a dual high beam imaging system according to claim 6, wherein: the biconvex lens comprises a biconvex lens and a biconcave lens which are connected in a glued mode, and the convex surface of the biconvex lens faces the incident direction of the incident light rays.
8. The color comparator using a dual high beam imaging system according to claim 6, wherein: the fourth lens (32) adopts a meniscus lens, and the concave side of the meniscus lens faces the incident direction of the incident light.
9. The color comparator using a dual high beam imaging system according to claim 8, wherein: the fifth lens (33) adopts a meniscus lens, the concave side of the meniscus lens faces the incident direction of the incident light, and the curvature of the concave side of the meniscus lens is larger than that of the corresponding concave side of the fourth lens (32).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321327429.2U CN220913428U (en) | 2023-05-29 | 2023-05-29 | Color comparator adopting double-high beam imaging system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321327429.2U CN220913428U (en) | 2023-05-29 | 2023-05-29 | Color comparator adopting double-high beam imaging system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220913428U true CN220913428U (en) | 2024-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321327429.2U Active CN220913428U (en) | 2023-05-29 | 2023-05-29 | Color comparator adopting double-high beam imaging system |
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| Country | Link |
|---|---|
| CN (1) | CN220913428U (en) |
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2023
- 2023-05-29 CN CN202321327429.2U patent/CN220913428U/en active Active
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