CN108814529B - Electronic endoscope-based lighting system - Google Patents
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- CN108814529B CN108814529B CN201810183906.XA CN201810183906A CN108814529B CN 108814529 B CN108814529 B CN 108814529B CN 201810183906 A CN201810183906 A CN 201810183906A CN 108814529 B CN108814529 B CN 108814529B
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- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/06—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements
- A61B1/0661—Endoscope light sources
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Abstract
The invention discloses an electronic endoscope-based illumination system, which comprises: a plurality of light sources, further comprising: a second prism and a plurality of first prisms; each light source corresponds to one first prism, each light source is positioned on the central axis of the first prism corresponding to each light source, and the central axes of the first prisms are parallel to each other; the light beam of each light source is refracted by the first prism corresponding to each light source and then irradiates the second prism; the light beam of each light source is injected into the electronic endoscope optical cable through the second prism. Therefore, in the scheme, each light source is located on the central axis of the first prism corresponding to each light source, so that each light source is located on the same side, and the problem that in the prior art, due to the fact that light beams emitted by each light source need to be distributed orthogonally, space occupation caused by staggered placement of each light source is too large is solved.
Description
Technical Field
The invention relates to the field of medical instruments, in particular to an electronic endoscope-based illumination system.
Background
Electronic endoscopes are one of the indispensable instruments for medical examination at present. Electronic endoscopes typically include an intracavity luminescent illumination system, a video processing system, and a display printing system that are integral parts of the electronic endoscope's primary structure. Wherein. The intracavity cold light illuminating system generally adopts a broad-spectrum white light source for illumination, and when the white light source is adopted for illuminating tissues in a body, due to the existence of multiple scattering, the image received by the display end of the electronic endoscope has low contrast and fuzzy details, is not beneficial to observing a tiny vascular structure, and influences medical care personnel to distinguish normal tissues from pathological tissues. Therefore, when a white light source is used for illumination, certain specific wave band light rays which can be absorbed by blood vessels and are not scattered widely and deeply are selected for supplementary illumination so as to obtain a detailed graph with strong contrast.
The conventional method of using light of a specific wavelength band for supplementary lighting is to use the structure shown in fig. 1, in which one surface of each light combining plate is plated with an antireflection film and the other surface is plated with an antireflection film in the structure shown in fig. 1. When the structure in fig. 1 is adopted, since each light combining sheet needs to be obliquely arranged so that the light of each light source is converged into one bundle before entering the optical cable, more dimensional allowance needs to be given in the vertical axis direction. Secondly, when the structure shown in fig. 10 of fig. 1 is adopted, the optical paths corresponding to each light source need to be recursively and orthogonally distributed, and therefore, as the number of the light sources increases, the occupied space of the light sources also increases.
Therefore, how to reduce the space required for the illumination system in the electronic endoscope is a problem to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide an electronic endoscope-based illumination system, which reduces the space required by the illumination system in the electronic endoscope.
In order to achieve the above purpose, the embodiment of the present invention provides the following technical solutions:
the embodiment of the invention provides an electronic endoscope-based illumination system, which comprises:
a plurality of light sources, further comprising: a second prism and at least two first prisms;
wherein each of the light sources corresponds to one of the first prisms,
each light source is positioned on the central axis of the first prism corresponding to each light source, and the central axes of the first prisms are parallel to each other; the light beam of each light source is refracted by the first prism corresponding to each light source and then irradiates the second prism;
and light beams of the light sources are incident into the electronic endoscope optical cable through the second prism.
Preferably, the first prism is a chamfered cylinder, the area of a chamfered surface of the chamfered cylinder is larger than the area of a bottom surface of the chamfered cylinder, and the light beam enters perpendicularly to the bottom surface of the chamfered cylinder and exits from the chamfered surface of the chamfered cylinder.
Preferably, when the light beam is emitted from the oblique plane of the first prism, the included angle between the light beam and the horizontal axis is θ, then the oblique angle of the first prism satisfies the formula:
α＝π/2+θ-arcsin(ncosθ)；
wherein the different refractive indices n correspond to different chamfer angles α for the refractive index of the first prism.
Preferably, there are two light sources, and correspondingly, there are two first prisms; and the outgoing light beams transmitted along the central axis of the first prism corresponding to the first light source and the central axis of the first prism corresponding to the second light source intersect with the extension line of the central axis of the second prism at one point.
Preferably, the light source is specifically an L ED lamp or a semiconductor laser light source.
Preferably, the method further comprises the following steps: a front end lens;
the central axes of the front end lens and the first prism are coincided so that the light beam of the light source corresponding to the first prism is irradiated on the first prism through the front end lens.
Preferably, each first prism corresponds to two front end lenses, and central axes of the two front end lenses coincide with a central axis of the first prism.
Preferably, the front lens is a biconvex lens.
Preferably, the method further comprises the following steps: a rear end lens;
the central axes of the rear end lens and the second prism are coincided, so that the light beam emitted from the first prism sequentially passes through the second prism and the rear end lens to enter the electronic endoscope optical cable.
Preferably, the second prism is rotatable around a central axis so that the light beam emitted from each of the first prisms irradiates the same region of the second prism.
The invention discloses an electronic endoscope-based illumination system, which comprises: a plurality of light sources, further comprising: a second prism and a plurality of first prisms; each light source corresponds to one first prism, each light source is positioned on the central axis of the first prism corresponding to each light source, and the central axes of the first prisms are parallel to each other; the light beam of each light source is refracted by the first prism corresponding to each light source and then irradiates the second prism; the light beam of each light source is injected into the electronic endoscope optical cable through the second prism. Therefore, in the scheme, each light source is located on the central axis of the first prism corresponding to each light source, so that each light source is located on the same side, and the problem that in the prior art, due to the fact that light beams emitted by each light source need to be distributed orthogonally, space occupation caused by staggered placement of each light source is too large is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of an illumination system of an electronic endoscope according to the prior art disclosed in the present invention;
FIG. 2 is a schematic structural diagram of an electronic endoscope-based illumination system according to a first embodiment of the present invention;
FIG. 3 is a schematic structural diagram of an electronic endoscope-based illumination system according to a second embodiment of the present invention;
fig. 4 is a schematic structural diagram of an electronic endoscope-based illumination system according to a third embodiment of the present invention.
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 embodiment of the invention discloses an electronic endoscope-based illumination system, which reduces the space required by the illumination system in an electronic endoscope.
Referring to fig. 2, fig. 2 is a schematic structural diagram of an electronic endoscope-based illumination system according to an embodiment of the present invention, in this embodiment, the number of light sources is three, the number of corresponding first prisms is also three, and the external structures of the first prisms and the second prisms are chamfered cylinders, but it should be noted that the number of light sources in this embodiment is not limited to three, and the external structures of the first prisms and the second prisms are not limited to the structures in the drawing; the lighting system 20 comprises: a plurality of light sources 101, further comprising: a second prism 102 and at least two first prisms 103; each light source 101 corresponds to one first prism 103; each light source 101 is positioned on the central axis of the first prism 103 corresponding to each light source 101, the central axes of the first prisms 103 are parallel to each other, and the light beam of each light source 101 is refracted by the first prism 103 corresponding to each light source 101 and then irradiates the second prism 102; the light beam from each light source 101 is incident on the electronic endoscope optical cable through the second prism 102.
Specifically, in this embodiment, the number of the light sources 101 is at least two, and the reason why at least two light sources are used is that when one light source is used for compensating light for the electronic endoscope, the definition of an image captured by the scope of the electronic endoscope is too low due to insufficient light. The number of first prisms 103 corresponds to the number of light sources 101. I.e. one first prism 103 for each light source 101. Of course, the number of the light sources 101 and the number of the first prisms 103 may be determined according to the actual medical environment, and the embodiment of the invention is not limited herein. The first prism 103 and the second prism 102 may have the same structure, but may have different structures as long as the light refracted by the first prism 103 is irradiated to the same point of the second prism 102.
Therefore, in view of the convenience of processing and the problem of reducing the space occupation as much as possible, the first prism 103 and the second prism 102 are both of the same structure, and as a preferred embodiment, the first prism 103 is a chamfered cylinder, the area of the chamfered surface of the chamfered cylinder is larger than the area of the bottom surface of the chamfered cylinder, and the light beam enters perpendicular to the bottom surface of the chamfered cylinder and exits from the chamfered surface of the chamfered cylinder.
Specifically, in this embodiment, the light source 101 is located on the central axis of the first prism 103, and the light beam emitted from the light source 101 is irradiated to the second prism 102 by refraction of the first prism 103. When each light source 101 is refracted by the first prism 103 corresponding to each light source 101, the light beam is irradiated on the diagonal surface of the second prism 102. And then, the light beams are refracted by the oblique plane of the second prism 102 to form a bundle and enter the second prism 102, and finally, the bundle of light beams is emitted out through the bottom surface of the second prism 102 and enters the electronic endoscope optical cable. Of course, the structure of the first prism 103 and the second prism 102 may be a chamfered rectangular parallelepiped, but it should be ensured that the surface of the rectangular parallelepiped on which the light beam emitted by the light source 101 is incident needs to be perpendicular to the direction of the light beam, the chamfer angles of the first prism 103 and the second prism 102 are the same, and the chamfer plane of the rectangular parallelepiped is preferably chamfered along the body diagonal of the rectangular parallelepiped. When the first prism 103 and the second prism 102 are chamfered, the chamfer angles of the chamfer surfaces are the same. However, the first prism 103 and the second prism 102 may have different outer shapes. For example, the first prism 103 is a chamfered cylinder, and the second prism 102 is a chamfered rectangular parallelepiped, as long as the chamfered surfaces of the first prism 103 and the second prism 102 are the same. It is ensured that the light beams of each light source 101 passing through the first prism 103 and the second prism 102 are converged into one beam. The shapes of the first prism 103 and the second prism 102 do not affect the implementation of the embodiment of the present invention. Therefore, the first prism 103 and the second prism 102 are not limited in shape in the embodiment of the present invention.
In this embodiment, the first prism 103 is disposed at a position where the light beams emitted from the light source 101 are irradiated to the same point of the oblique cutting plane of the second prism 102 through the first prism 103, so that the light beams are converged into one beam through the oblique cutting plane of the second prism 102.
In order to ensure the proper chamfer of the chamfered cylinder, as a preferred embodiment, the chamfer angle of the chamfered surface of the chamfered cylinder may be determined by the following formula, the angle of the chamfered surface of the first prism 103 when the light beam is emitted from the chamfered surface of the first prism 103 is θ from the horizontal axis, and the chamfer angle α of the first prism 103 satisfies the formula:
α＝π/2+θ-arcsin(ncosθ)；
where n is the refractive index of the first prism 103, and the chamfer angle α is different according to the difference in the refractive index n.
Specifically, in this embodiment, the angle θ between the oblique cut α of the first prism 103 and the horizontal axis when the oblique cut is projected should satisfy the above relationship, so as to ensure that each light beam can be irradiated on the oblique cut of the second prism 102 after being refracted by the first prism 103. the oblique cut α is the angle between the center line of symmetry of the oblique cut and the horizontal line.
The refractive index n differs depending on the material of the first prism 103 and the second prism 102. Accordingly, the refractive index n is not limiting herein.
In a preferred embodiment, there are two light sources 101, and correspondingly, there are two first prisms 103; and the outgoing light beams transmitted along the central axis of the first prism corresponding to the first light source and the central axis of the first prism corresponding to the second light source intersect with the extension line of the central axis of the second prism at one point.
Specifically, in this embodiment, two light sources 101 are merely illustrated, the number of the light sources 101 may be other numbers, and the light beams emitted along the central axis of the first prism corresponding to each light source intersect with the extension line of the central axis of the second prism. The number of light sources is not limited in the embodiments of the present invention.
Based on the above embodiments, as a preferred embodiment, the light source is specifically an L ED lamp or a semiconductor laser light source.
Specifically, in this embodiment, the type of the light source may also be other types, and the type of the light source does not affect the implementation of the embodiment of the present invention, and the type of the light source is not limited herein.
In view of the fact that the light beams emitted by the light sources are relatively dispersed, before the light beams emitted by each light source 101 enter the first prism 103, the light beams emitted by the light sources are too dispersed, which results in poor convergence effect of the first prism 103 on the light beams, based on the above embodiment, the present invention provides a second embodiment, please refer to fig. 3, fig. 3 is a schematic structural diagram of an electronic endoscope-based illumination system disclosed by the second embodiment of the present invention, and as a preferred embodiment, the illumination system 20 further includes:
and a tip lens 104, wherein the tip lens 104 coincides with the central axes of the first prism 103 such that the light flux of the light source 101 corresponding to the first prism 103 is irradiated to the first prism 103 through the tip lens 104.
Based on the above embodiment, as a preferred embodiment, each first prism 103 corresponds to two front end lenses 104, wherein the central axes of the two front end lenses 104 are coincident with the central axis of the first prism 103.
Specifically, in this embodiment, the number of the front end lens 104 is not limited to two, for example, the number of the front end lens 104 may also be one, and the specific number may be determined according to actual situations, as long as it is ensured that the light beam emitted by the light source is adjusted to be a collimated light beam, and therefore, the embodiment of the present invention is not limited herein.
Based on the above embodiments, the front end lens 104 is embodied as a biconvex mirror as a preferred embodiment.
Specifically, in this embodiment, the front lens 104 may also be a plano-convex lens, and a specific type of lens may be determined according to actual situations, which is not limited herein in this embodiment of the present invention.
In view of the fact that the light beam emitted through the second prism 102 may also be dispersed, based on the above embodiments, the present invention provides a third embodiment, please refer to fig. 4, where fig. 4 is a schematic structural diagram of an electronic endoscope-based illumination system disclosed in the third embodiment of the present invention, and as a preferred embodiment, the illumination system 20 further includes: a rear end lens 105;
the rear end lens 105 is overlapped with the central axis of the second prism 102 so that the light beam emitted from the first prism 103 passes through the second prism 102 and the rear end lens 105 in order and enters the electronic endoscope optical cable.
Specifically, in the present embodiment, the number and the type of the rear end lenses 105 may be the same as the number and the type of the front end lenses 104, and the number and the type of the front end lenses 104 and the rear end lenses 105 may also be different.
Considering that there is a problem in that the light beam of each light source 101 cannot be efficiently coupled to the second prism at the same time after being refracted by the first prism 103, based on the above embodiment, as a preferred embodiment, the second prism 102 may be rotated around the central axis so that the light beam emitted from each first prism 103 is irradiated to the same region of the second prism 102.
Specifically, in the present embodiment, when the second prism 102 is rotated so that the diagonal plane of the second prism is parallel to the diagonal plane of any one of the first prisms corresponding to each light source, the illumination effect is the best, i.e., the efficiency is the highest.
Therefore, the embodiment of the invention discloses an electronic endoscope-based illumination system, which comprises: a plurality of light sources, further comprising: a second prism and a plurality of first prisms; each light source corresponds to one first prism, each light source is positioned on the central axis of the first prism corresponding to each light source, and the central axes of the first prisms are parallel to each other; the light beam of each light source is refracted by the first prism corresponding to each light source and then irradiates the second prism; the light beams of the light sources are incident into the electronic endoscope optical cable after passing through the second prism. Therefore, in the scheme, each light source is located on the central axis of the first prism corresponding to each light source, so that each light source is located on the same side, and the problem that in the prior art, due to the fact that light beams emitted by each light source need to be distributed orthogonally, space occupation caused by staggered placement of each light source is too large is solved.
The electronic endoscope-based illumination system provided by the present application is described in detail above. The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.
The embodiments in the specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Claims (8)
1. An electronic endoscope-based illumination system comprising: a plurality of light sources, further comprising: a second prism and at least two first prisms;
wherein each light source corresponds to one first prism;
each light source is positioned on the central axis of the first prism corresponding to each light source, and the central axes of the first prisms are parallel to each other; the light beam of each light source is refracted by the first prism corresponding to each light source and then irradiates the second prism;
light beams of the light sources are incident into the electronic endoscope optical cable through the second prism;
the first prism is a beveled cylinder, the area of a beveled surface of the beveled cylinder is larger than the bottom area of the beveled cylinder, and the light beam is incident in a mode of being perpendicular to the bottom surface of the beveled cylinder and is emitted from the beveled surface of the beveled cylinder;
when the light beam is emitted from the oblique plane of the first prism, the included angle between the light beam and the horizontal axis is theta, and then the oblique angle α of the first prism satisfies the formula:
α＝π/2+θ-arcsin(ncosθ)；
where n is the index of refraction of the first prism, and different indices of refraction n correspond to different chamfer angles α.
2. The electronic endoscope-based illumination system of claim 1, wherein there are two light sources, and correspondingly, there are two first prisms; and the outgoing light beams transmitted along the central axis of the first prism corresponding to the first light source and the central axis of the first prism corresponding to the second light source intersect with the extension line of the central axis of the second prism at one point.
3. Electronic endoscope-based illumination system according to claim 1, characterized in that the light source is in particular an L ED lamp or a semiconductor laser light source.
4. The electronic endoscope-based illumination system of claim 1, further comprising: a front end lens;
the central axes of the front end lens and the first prism are coincided so that the light beam of the light source corresponding to the first prism is irradiated on the first prism through the front end lens.
5. The electronic endoscope-based illumination system of claim 4, wherein there are two front end lenses for each first prism, wherein the central axes of both front end lenses coincide with the central axis of the first prism.
6. The electronic endoscope-based illumination system of claim 5, wherein the front end lens is embodied as a biconvex mirror.
7. The electronic endoscope-based illumination system of claim 4, further comprising: a rear end lens;
the central axes of the rear end lens and the second prism are coincided, so that the light beam emitted from the first prism sequentially passes through the second prism and the rear end lens to enter the electronic endoscope optical cable.
8. The electronic endoscope-based illumination system of any of claims 1-7, wherein the second prism is rotatable about a central axis such that the light beam emitted by each of the first prisms impinges on the same area of the second prism.
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| CN101637381A (en) * | 2008-07-29 | 2010-02-03 | 精碟科技股份有限公司 | Endoscope light source module structure with light-emitting diodes |
| CN102238893B (en) * | 2008-12-05 | 2014-04-02 | 奥林巴斯株式会社 | Illuminating apparatus and endoscope apparatus |
| JP5767775B2 (en) * | 2009-07-06 | 2015-08-19 | 富士フイルム株式会社 | Endoscope device |
| JP5603583B2 (en) * | 2009-09-29 | 2014-10-08 | オリンパス株式会社 | Endoscope |
| CN201662652U (en) * | 2010-03-31 | 2010-12-01 | 洪政男 | Multifaceted prism imaging system |
| CN101881395B (en) * | 2010-07-19 | 2012-01-11 | 苏州捷美医疗器械有限公司 | Two-channel LED light-combined illuminating system |
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