CN219921015U - Endoscope lens and endoscope system - Google Patents
Endoscope lens and endoscope system Download PDFInfo
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- CN219921015U CN219921015U CN202320673881.8U CN202320673881U CN219921015U CN 219921015 U CN219921015 U CN 219921015U CN 202320673881 U CN202320673881 U CN 202320673881U CN 219921015 U CN219921015 U CN 219921015U
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- 238000003384 imaging method Methods 0.000 claims abstract description 129
- 238000005286 illumination Methods 0.000 claims abstract description 35
- 125000006850 spacer group Chemical group 0.000 claims description 12
- 238000004891 communication Methods 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 abstract 2
- 230000002349 favourable effect Effects 0.000 abstract 2
- 230000003287 optical effect Effects 0.000 description 7
- 238000012634 optical imaging Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Abstract
The utility model provides an endoscope lens and endoscope system, this endoscope lens includes the lens and sets up light source subassembly, first lens group and the beam split component in the lens cone, because the light source subassembly sets up in the lens, need not independently set up side by side with the lens, and because the beam split component can reflect illumination light to first lens group, can also transmit the focused imaging light of first lens group for form the shared light path of illumination and formation of image between beam split component and the first lens, practiced thrift the occupation space of illumination and formation of image, be favorable to the miniaturization of endoscope lens, thereby be favorable to the miniaturization of endoscope system.
Description
Technical Field
The utility model relates to the technical field of optical imaging lenses, in particular to an endoscope lens and an endoscope system.
Background
An endoscope is a medical instrument which can help doctors to observe and diagnose the inside of a patient, and the invasive diagnosis mode can cause pain to the patient, so that the miniaturization of the endoscope is important to improving the use experience of the patient and the doctor.
The existing endoscope imaging lens is independent of the imaging lens and the illumination part, the imaging lens does not contain the illumination part, and the illumination light source needs to be arranged side by side with the imaging lens, so that the endoscope is not beneficial to further miniaturization.
Disclosure of Invention
The utility model provides an endoscope lens and an endoscope system, which solve the problem that an illumination light path and an imaging light path are independently arranged and an endoscope cannot be miniaturized.
According to a first aspect, the present embodiment provides an endoscope lens including a barrel having an object side and an imaging side, further including:
the light source assembly is used for providing illumination light;
a first lens group to guide illumination light to an object and focus imaging light from the object;
and a light splitting element for reflecting the illumination light to the first lens group and transmitting the imaging light focused by the first lens group so that a common light path of the illumination light and the imaging light is formed between the light splitting element and the first lens group;
wherein, the light source component, the first lens group and the light splitting element are all arranged in the lens cone.
In an embodiment, the light splitting element has a light incident surface, an imaging incident surface and a light splitting surface, the light incident surface and the imaging incident surface are vertically arranged, the first lens group is arranged on one side of the imaging incident surface, the light source component is arranged on one side of the light incident surface, and the light splitting surface, the light incident surface and the imaging incident surface form an included angle of 45 degrees, so as to reflect the illumination light to the first lens group and transmit the imaging light.
In one embodiment, the light splitting element further has a diaphragm surface, where the diaphragm surface and the imaging incident surface are parallel and oppositely disposed, the diaphragm surface is disposed near the imaging surface, and a diaphragm hole is disposed at a center of the diaphragm surface, so as to limit the size of the imaging light.
In one embodiment, the light splitting element is a light splitting prism with a cube structure, and a semi-transparent and semi-reflective film is arranged on a diagonal surface of the light splitting prism to form the light splitting surface.
In one embodiment, the light incidence surface and the imaging incidence surface are provided with an antireflection film.
In an embodiment, the optical lens assembly further comprises an imaging lens assembly, wherein the imaging lens assembly is arranged in the lens barrel, is arranged on one side, away from the first lens assembly, of the light splitting element and is used for extending imaging light rays and focusing imaging the imaging side, the first lens assembly, the light splitting element and the imaging lens assembly are sequentially arranged from the object side to the imaging side and are coaxially arranged, the light splitting element and the light source assembly are coaxially arranged, and the first lens assembly and the light source assembly are vertically arranged.
In one embodiment, the first lens group includes a first lens having a convex surface toward the object side and an aspherical concave surface toward the imaging side; the imaging lens group comprises a second lens and a third lens, the second lens and the third lens are arranged in sequence from an object side to an imaging side, the second lens is provided with two convex surfaces facing the object side and the imaging side respectively, and is provided with at least one aspheric surface, and the radius of the convex surface facing the imaging side is smaller than that of the convex surface facing the object; the third lens has two concave surfaces facing the object side and the imaging side, respectively, and has at least one aspherical surface, wherein the radius of the concave surface facing the imaging side is larger than that of the concave surface facing the object side.
In an embodiment, still include first spacer ring and second spacer ring, the lens cone still including set up in the holding chamber between thing side and the imaging side, imaging side still is equipped with imaging sensor and guard glass, imaging sensor is used for acquireing imaging light and forms object imaging, first lens set up in the thing side, beam splitting element, light source subassembly and second lens pass through first spacer ring set up in the holding intracavity, third lens pass through second spacer ring set up in between second lens and the imaging side.
In one embodiment, the lens has a focal length of 0.7mm, an angle of view of 120 degrees, and an optical distortion of <40%.
In one embodiment, the LED lamp comprises a light source component, a light splitting element and a wire, wherein the light source component is an LED lamp, the LED lamp and the light splitting element are coaxially arranged, and the wire is connected with the LED lamp and used for realizing communication of a power supply circuit.
According to a second aspect, the present embodiment provides an endoscope system comprising an endoscope lens as described above.
According to the endoscope lens and the endoscope system in the above embodiments, since the light source assembly, the first lens group and the light splitting element are arranged in the lens barrel, the illuminating light source is not required to be arranged side by side independently of the lens, so that the space occupied by illumination and imaging is saved, and the miniaturization of the endoscope system is facilitated.
Drawings
FIG. 1 is an optical imaging schematic of an endoscope lens;
FIG. 2 is a schematic view of an endoscope;
FIG. 3 is a schematic view of a beam splitting prism of an endoscope lens;
FIG. 4 is a schematic view of the diaphragm surface structure of an endoscope lens;
FIG. 5 is an exploded view of an endoscope lens;
FIG. 6 is a schematic view of the appearance of an endoscope lens;
FIG. 7 is a schematic view of another angular appearance of an endoscope lens;
FIG. 8 is a graph of optical distortion in one embodiment;
wherein: 1. the light source assembly comprises a light source assembly body 2, a first lens body 3, a light splitting element 31, a light incidence surface 32, an imaging incidence surface 33, a light splitting surface 34, a diaphragm surface 341, a diaphragm hole 4, a second lens body 5, a third lens body 6, a protective mirror 7, an imaging sensor 8, a wire 9, a lens barrel 10, a first space ring 11 and a second space ring.
Detailed Description
The utility model will be described in further detail below with reference to the drawings by means of specific embodiments. Wherein like elements in different embodiments are numbered alike in association. In the following embodiments, numerous specific details are set forth in order to provide a better understanding of the present utility model. However, one skilled in the art will readily recognize that some of the features may be omitted, or replaced by other elements, materials, or methods in different situations. In some instances, related operations of the present utility model have not been shown or described in the specification in order to avoid obscuring the core portions of the present utility model, and may be unnecessary to persons skilled in the art from a detailed description of the related operations, which may be presented in the description and general knowledge of one skilled in the art.
Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments, and the operational steps involved in the embodiments may be sequentially exchanged or adjusted in a manner apparent to those skilled in the art. Accordingly, the description and drawings are merely for clarity of describing certain embodiments and are not necessarily intended to imply a required composition and/or order.
The numbering of the components itself, e.g. "first", "second", etc., is used herein merely to distinguish between the described objects and does not have any sequential or technical meaning. The term "coupled" as used herein includes both direct and indirect coupling (coupling), unless otherwise indicated.
According to a first aspect, the present embodiment provides an endoscope lens, applied to an endoscope system, having an illumination light path for illuminating a measured object and an imaging light path for acquiring object imaging of the measured area using an optical imaging principle.
Referring to fig. 1-2, the endoscope lens comprises a lens barrel 9, a light source assembly 1, a first lens group, a light splitting element 3 and an imaging lens group, wherein the light source assembly 1 is arranged in the lens barrel 9 and becomes a part of the lens, so that the illuminating light sources do not need to be arranged side by side independently of the lens, the space occupied by illumination and imaging is saved, and the miniaturized arrangement of an endoscope system is facilitated.
Specifically, the light source assembly 1, the light splitting element 3 and the first lens group form a light path of light source light, the light splitting element 3, the first lens group and the imaging lens group form a light path of imaging light, the light source assembly 1 is used for providing illumination light, the first lens group is used for guiding the illumination light to an object and focusing the imaging light from the object, the light splitting element 3 is used for reflecting the illumination light to the first lens group and transmitting the light focused by the first lens group, so that a common light path of the illumination light and the imaging light is formed between the light splitting element 3 and the first lens group, and further the miniaturized setting of an endoscope lens is facilitated, thereby realizing the miniaturized setting of an endoscope system.
In other technical schemes, the first lens group is only used as an imaging element in an object imaging light path, and a light guide element in an illumination light path is also required to be independently arranged, illumination and imaging are independently arranged side by side, and the two independent light paths occupy large space, so that the endoscope is not beneficial to miniaturization.
In this embodiment, the light splitting element 3 can reflect the illumination light emitted by the light source assembly 1 to the first lens group by using the reflection principle, so that a common light path of the illumination light path and the imaging light path is formed between the light splitting element 3 and the first lens group, the first lens group and the light splitting element 3 are used as common elements, the first lens group can be used as the imaging element in the imaging light path to increase the angle of view and can also be used as the light guiding element in the illumination light path to guide the light to the object, so that the illumination light and the imaging light are coaxial, the light splitting element 3 can be used as a reflecting element and a transmitting element, the arrangement of elements in the endoscope lens is reduced, the occupied space is reduced, the miniaturization of the endoscope lens is realized, and the miniaturization of the endoscope system is finally realized, and meanwhile, the endoscope lens has good imaging effect.
Further, the imaging lens group is disposed at a side of the light splitting element 3 away from the first lens group, and is used for extending the light and focusing and imaging on an imaging plane.
Further, the lens barrel 9 has an object side and an imaging side, and the first lens group, the spectroscopic element 3, and the imaging lens group are disposed in order from the object side to the imaging side and coaxially disposed.
Referring to fig. 3, in this embodiment, the light splitting element 3 has a light incident surface 31, an imaging incident surface 32 and a light splitting surface 33, the light incident surface 31 and the imaging incident surface 32 are vertically disposed, the first lens group is disposed on one side of the imaging incident surface 32, and is capable of focusing the light reflected by the object onto the imaging incident surface 32, and transmitting the light through the light splitting surface 33, the light source assembly 1 is disposed on one side of the light incident surface 31, and is capable of providing the illumination light onto the light incident surface 31, and reflecting the illumination light onto the first lens group through the light splitting surface 33, and the light splitting surface 33 forms an angle of 45 ° with both the light incident surface 31 and the imaging incident surface 32, so as to reflect the illumination light onto the first lens group and transmit the object light onto the imaging lens group.
Referring to fig. 3 and 4, in this embodiment, the light splitting element 3 further has a diaphragm surface 34, where the diaphragm surface 34 and the imaging incident surface 32 are parallel and oppositely disposed, the diaphragm surface 34 is disposed near the imaging surface, a diaphragm hole 341 is disposed in the center of the diaphragm surface 34, so as to limit the size of the imaging light, and an axis of the diaphragm hole 341 coincides with an axis of the imaging light.
Specifically, the diaphragm surface 34 in the present embodiment is formed by applying a black coating or a black printing process to one side surface of the spectroscopic element 3, and the diaphragm hole 341 is formed as an uncolored region. The diaphragm surface 34 and the light splitting element 3 are integrated through the processing, so that the light splitting element 3 has the function of a diaphragm at the same time, the installation is simplified, the thickness of the diaphragm is reduced, and the thinning and the compactness of the endoscope lens are realized.
Specifically, the diaphragm hole 341 has a circular structure. Of course, rectangular structures are also possible.
In this embodiment, the light splitting element 3 is a light splitting prism with a cube structure, and a semi-transparent and semi-reflective film is disposed on a diagonal surface of the light splitting prism to form the light splitting surface 33, so that not only can illumination light be reflected, but also light imaged by an object can be transmitted.
Further, the light splitting element 3 and the light source assembly 1 are coaxially disposed, and the first lens group and the light source assembly 1 are vertically disposed.
In another embodiment, the light-splitting element 3 may be composed of two symmetrical right-angle prisms, and a semi-transparent and semi-reflective film is disposed on the contact surface of the right-angle prisms.
In this embodiment, the light incident surface 31 and the imaging incident surface 32 are both provided with an antireflection film, so that the light transmittance can be increased, and the imaging effect can be improved.
In order to further achieve compactness and miniaturization of the endoscope lens, the first lens group is provided with only the first lens 2, and the first lens 2 has a convex surface facing the object side and an aspherical concave surface facing the imaging side, is a negative lens, and can collect light.
It can be understood that a plurality of lenses may be provided to form the first lens group according to actual requirements, so as to guide the illumination light to the object and collect the light reflected by the object.
In this embodiment, the imaging lens group includes a second lens 4 and a third lens 5, where the second lens 4 and the third lens 5 are disposed in order from an object side to an imaging side, and the second lens 4 has two convex surfaces facing the object side and the imaging side, respectively, and has at least one aspherical surface, and a radius of the convex surface facing the imaging side is smaller than that of the convex surface facing the object side; the third lens 5 has two concave surfaces facing the object side and the imaging side, respectively, and has at least one aspherical surface, wherein the radius of the concave surface facing the imaging side is larger than that of the concave surface facing the object side, and the second lens 4 and the third lens 5 together extend and collect imaging light rays of imaging an object.
Referring to fig. 5-7, in this embodiment, the lens barrel 9 further includes a first spacer ring 10 and a second spacer ring 11, the lens barrel 9 further includes a receiving cavity disposed between the object side and the imaging side, the imaging side is provided with an imaging sensor 7 and a protection mirror 6, the imaging sensor 7 is used for acquiring imaging light and forming object imaging, the protection mirror 6 is disposed on the lens barrel 9 to protect the imaging sensor 7 from damage, the first lens 2 is disposed on the object side, the light splitting element 3, the light source assembly 1 and the second lens 4 are disposed in the receiving cavity through the first spacer ring 10, and the third lens 5 is disposed between the second lens 4 and the imaging side through the second spacer ring 11.
Specifically, the imaging sensor is a photosensitive sensor, can convert optical signals into electric signals and transmit the electric signals to a control device of the endoscope system, and then the control device controls a display device to display the electric signals, so that medical staff can observe and diagnose the inside of a patient conveniently.
In this embodiment, the focal length of the lens is 0.7mm, the angle of view is 120 degrees, the optical distortion is <40%, the parameters of each lens are shown in the following table, the optical distortion curve is shown in fig. 8, the optical distortion meets the above requirements, and the optical imaging effect is good.
Table 1 shows parameters of the lens in one embodiment
In this embodiment, the light source assembly 1 further includes a wire 8, the light source assembly 1 is an LED lamp, the LED lamp and the light splitting element 3 are coaxially disposed, the wire 8 is connected with the LED lamp, so as to implement power supply circuit communication, and the wire 8 passes through the lens barrel 9 and is connected with a power supply of the endoscope system.
According to a second aspect, the present embodiment provides an endoscope system comprising the above-described endoscope lens configured to be inserted into a body of a patient under test for obtaining imaging of an object in a region of the patient under test.
The foregoing description of the utility model has been presented for purposes of illustration and description, and is not intended to be limiting. Several simple deductions, modifications or substitutions may also be made by a person skilled in the art to which the utility model pertains, based on the idea of the utility model.
Claims (10)
1. An endoscope lens comprising a barrel having an object side and an imaging side, further comprising:
the light source assembly is used for providing illumination light;
a first lens group to guide illumination light to an object and focus imaging light from the object;
and a light splitting element for reflecting the illumination light to the first lens group and transmitting the imaging light focused by the first lens group so that a common light path of the illumination light and the imaging light is formed between the light splitting element and the first lens group;
wherein, the light source component, the first lens group and the light splitting element are all arranged in the lens cone.
2. The endoscope lens according to claim 1, wherein the light splitting element has a light incident surface, an imaging incident surface and a light splitting surface, the light incident surface and the imaging incident surface are vertically arranged, the first lens group is arranged at one side of the imaging incident surface, the light source component is arranged at one side of the light incident surface, and the light splitting surface forms an included angle of 45 ° with both the light incident surface and the imaging incident surface, so as to reflect the illumination light to the first lens group and transmit the imaging light.
3. An endoscope lens according to claim 2, wherein said beam splitting element further has a diaphragm surface, said diaphragm surface and said imaging incidence surface are disposed in parallel and opposite to each other, said diaphragm surface is disposed close to the imaging surface, and a diaphragm aperture is provided in the center of said diaphragm surface for limiting the size of said imaging light.
4. An endoscope lens according to claim 2, wherein said light-splitting element is a light-splitting prism having a cube structure, and a half-transparent and half-reflective film is provided on a diagonal surface of said light-splitting prism to form said light-splitting surface.
5. An endoscope lens according to claim 2, wherein said light incidence surface and said imaging incidence surface are provided with antireflection films.
6. The endoscope lens as defined in claim 1, further comprising an imaging lens group disposed in the lens barrel and on a side of the spectroscopic element away from the first lens group for extending the imaging light and focusing the imaging light to an imaging side, wherein the first lens group, the spectroscopic element and the imaging lens group are disposed in order from the object side to the imaging side and are disposed coaxially, the spectroscopic element and the light source assembly are disposed coaxially, and the first lens group and the light source assembly are disposed vertically.
7. An endoscope lens according to claim 6, wherein said first lens group comprises a first lens having a convex surface facing the object side and an aspherical concave surface facing the imaging side; the imaging lens group comprises a second lens and a third lens, the second lens and the third lens are arranged in sequence from an object side to an imaging side, the second lens is provided with two convex surfaces facing the object side and the imaging side respectively, and is provided with at least one aspheric surface, and the radius of the convex surface facing the imaging side is smaller than that of the convex surface facing the object; the third lens has two concave surfaces facing the object side and the imaging side, respectively, and has at least one aspherical surface, wherein the radius of the concave surface facing the imaging side is larger than that of the concave surface facing the object side.
8. The endoscope lens of claim 7, further comprising a first spacer ring and a second spacer ring, wherein the lens barrel further comprises a receiving cavity arranged between the object side and the imaging side, the imaging side is further provided with an imaging sensor and a protective lens, the imaging sensor is used for acquiring imaging light and forming object imaging, the first lens is arranged on the object side, the light splitting element, the light source assembly and the second lens are arranged in the receiving cavity through the first spacer ring, and the third lens is arranged between the second lens and the imaging side through the second spacer ring.
9. An endoscope lens according to claim 1 and also comprising a wire, said light source assembly being an LED lamp coaxially arranged with said light splitting element, said wire being connected with said LED lamp for providing communication with a power supply circuit.
10. An endoscope system comprising an endoscope lens according to any one of claims 1-9.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2023205760320 | 2023-03-22 | ||
| CN202320576032 | 2023-03-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219921015U true CN219921015U (en) | 2023-10-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320673881.8U Active CN219921015U (en) | 2023-03-22 | 2023-03-30 | Endoscope lens and endoscope system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219921015U (en) |
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2023
- 2023-03-30 CN CN202320673881.8U patent/CN219921015U/en active Active
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