CN117357048A - Light source device and medical endoscope system - Google Patents

Light source device and medical endoscope system Download PDF

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Publication number
CN117357048A
CN117357048A CN202311489499.2A CN202311489499A CN117357048A CN 117357048 A CN117357048 A CN 117357048A CN 202311489499 A CN202311489499 A CN 202311489499A CN 117357048 A CN117357048 A CN 117357048A
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light source
optical fiber
output
light
branch optical
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熊乔洲
余华亮
白晓淞
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Innermedical Co ltd
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Innermedical Co ltd
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • 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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • 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
    • A61B1/0655—Control therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • 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
    • A61B1/07—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 using light-conductive means, e.g. optical fibres

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Biomedical Technology (AREA)
  • Optics & Photonics (AREA)
  • Pathology (AREA)
  • Radiology & Medical Imaging (AREA)
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  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Optical Couplings Of Light Guides (AREA)

Abstract

The present application relates to a light source device and a medical endoscope system. The device comprises: a light source and a light source transmission module; one end part of the light source transmission module is an input end, the other end part of the light source transmission module is an output end, the input end is correspondingly connected with the light source, and light emitted by the light source is transmitted to the light source transmission module through the input end and is output through the output end; the light source transmission module comprises a plurality of branch optical fiber bundles, one ends of the plurality of branch optical fiber bundles are respectively formed at a target end, and the target end comprises any one of an input end and an output end; the plurality of branch optical fiber bundles are wound around a portion facing away from the target end to form at the other end, and the other end includes the other of the input end and the output end except the target end. In the device, light emitted by the light source is transmitted to each branch optical fiber bundle through the input end and is output through the output end, so that the light uniformity in the transmission process is ensured, and meanwhile, the light source is not required to be coupled or dispersed by other optical elements, so that the light source transmission efficiency is improved.

Description

Light source device and medical endoscope system
Technical Field
The present application relates to the field of light source technologies, and in particular, to a light source device and a medical endoscope system.
Background
In a medical endoscope system, a light source is transmitted into an endoscope body by a light source device, thereby providing an illumination function for an object to be observed.
In the prior art, a xenon lamp system, an LED cold light source, a semiconductor laser system and other light source systems can be adopted, and the light source is transmitted to the end face of a light guide piece of an endoscope body through a collimating lens and a focusing lens which are matched with each other or through a beam combining optical device.
However, the current light source system has a complex system structure and a large volume, and the optical device has the influence of absorption and reflection on the light, so that the overall transmission efficiency of the light source is reduced.
Disclosure of Invention
In view of the above, it is desirable to provide a light source device and a medical endoscope system that can improve the light source transmission efficiency.
In a first aspect, the present application provides a light source device, the device comprising:
a light source; the light source transmission module is characterized by comprising a light source, a light source module and a light source module, wherein one end part of the light source transmission module is an input end, the other end part of the light source transmission module is an output end, the input end is correspondingly connected with the light source, and light emitted by the light source is transmitted to the light source transmission module through the input end and is output through the output end;
the light source transmission module comprises a plurality of branch optical fiber bundles, wherein one ends of the plurality of branch optical fiber bundles are respectively formed at a target end, and the target end comprises any one of the input end and the output end; the parts of the plurality of branch optical fiber bundles, which deviate from the target end, are wound and arranged to form at the other end, and the other end comprises the other one of the input end and the output end except the target end;
the light emitted by the light source is transmitted to each branch optical fiber bundle through the input end and is output through the output end.
In one embodiment, the target ends of the plurality of branch optical fiber bundles are input ends, the other ends of the plurality of branch optical fiber bundles are output ends, and the plurality of branch optical fiber bundles are wound on a part close to the output ends to form a total output end; the light sources comprise a plurality of light sources, each light source corresponds to each input end respectively, and light emitted by the light sources is transmitted to the corresponding branch optical fiber bundles through the corresponding input ends respectively and is output through the total output ends.
In one embodiment, the target ends of the plurality of branch optical fiber bundles are output ends, the other ends of the plurality of branch optical fiber bundles are input ends, the light source transmission module comprises an input end and a plurality of output ends, and the plurality of branch optical fiber bundles are wound on a part close to the input end to form a total input end; the light emitted by the light source is transmitted to the corresponding branch optical fiber bundles through the total input end and is output through the plurality of output ends.
In one embodiment, each branched optical fiber bundle comprises a plurality of optical fibers, and one ends of the plurality of optical fibers are respectively formed at the target end; the parts of the optical fibers, which deviate from the target end, are wound and arranged to form at the other end; the light emitted by the light source is transmitted to the optical fibers through the input end and is output through the output end.
In one embodiment, the optical fibers corresponding to each branched optical fiber bundle are distributed at equal intervals at the input end and/or the output end.
In one embodiment, the plurality of optical fibers corresponding to each branched optical fiber bundle are arranged in a matrix at the input end and/or the output end according to a preset interval.
In one embodiment, the light source has a light surface shape adapted to the cut surface shape of the corresponding branched fiber bundle.
In one embodiment, when the light surface size of the light source is equal to the cut surface size of the corresponding branch optical fiber bundle, the coupling efficiency between the light source and the branch optical fiber bundle increases as the numerical aperture of the branch optical fiber bundle increases.
In a second aspect, the present application also provides a medical endoscope system, including an endoscope body, and the light source device; the endoscope body is connected with the output end of the light source device, and the light output by the light source device is transmitted to the endoscope body through the output end of the light source device, and is output through the front end of the endoscope body and irradiates an object to be observed.
In one embodiment, the system further comprises a camera device and a display device; the image pickup device is arranged at the front end of the endoscope body and is connected with the display device, and the image pickup device obtains the image of the object to be observed under the illumination environment provided by the light source device and transmits the image to the display device for display.
According to the light source device and the medical endoscope system, one ends of the plurality of branch optical fiber bundles are respectively formed at the target end, the target end comprises one of the input end and the output end, the part deviating from the target end is wound and arranged to form at the other end, the other end comprises the other one of the input end and the output end except the target end, light emitted by the light source is transmitted to each branch optical fiber bundle through the input end and is output through the output end, so that light uniformity in the transmission process is guaranteed, and meanwhile, the light source is not required to be coupled or dispersed by other optical elements, so that the light source transmission efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the related art, the drawings that are required to be used in the embodiments or the related technical descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to the drawings without inventive effort for a person having ordinary skill in the art.
FIG. 1 is a block diagram of a light source device in one embodiment;
FIG. 2 is a block diagram of a light source device according to still another embodiment;
FIG. 3 is a schematic diagram of a light source light surface in one embodiment;
fig. 4 is a schematic diagram of a fiber optic bundle receiving light source in one embodiment.
Detailed Description
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. Alternative embodiments of the invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
In the related art, a light source system such as a xenon lamp system, an LED cold light source system, a semiconductor laser system, or the like is generally used to provide an illumination function. Wherein, the optical system is usually provided with optical elements such as a collimating lens, a condensing lens and the like in a matching way, and the light emitted by the light source is output to a target object through the optical elements with complex combination; secondly, when the light source is involved in beam splitting transmission, a beam splitting optical device is additionally added, and the performance of the combined beam is controlled through the beam splitting optical device so as to adjust the light energy incident to a target object; furthermore, when multiple light sources are involved in beam combination transmission, additional beam combining optics are required, by which the performance of the combined beam is controlled to adjust the light energy incident on the target object.
The above-mentioned complex combination of optical elements, additional beam splitting optical devices or beam combining optical devices results in a more complex corresponding system structure and an increased system volume of the light source system in the related art, and at the same time, the optical elements themselves absorb and reflect light, resulting in an increased loss of the light source system during the coupling or separating process, thereby reducing the transmission efficiency of the light source in the light source system.
In order to solve the above problems, the present application provides a light source device, which includes a light source and a light source transmission module; the light source is used for generating light, and the light source transmission module is used for transmitting the light generated by the light source to a target object, and the target object can be represented as an optical fiber, an optical sensor, an optical element and other components or imaging equipment, communication equipment and other electronic equipment.
One end of the light source transmission module is an input end, the other end of the light source transmission module is an output end, the input end is correspondingly connected with the light source, and light emitted by the light source is transmitted to the light source transmission module through the input end and is output through the output end.
The light source transmission module comprises a plurality of branch optical fiber bundles, wherein one ends of the plurality of branch optical fiber bundles are respectively formed at a target end, and the target end comprises any one of an input end and an output end; a plurality of branch optical fiber bundles are wound around a portion facing away from the target end to form at the other end, the other end including the other of the input end and the output end except the target end. Light emitted by the light source is transmitted to each branch optical fiber bundle through the input end and is output through the output end.
Illustratively, one end of a plurality of branch optical fiber bundles is formed at a plurality of input ends correspondingly, and the plurality of branch optical fiber bundles are wound around a portion facing away from the input ends to form one output end. Further exemplary, one end of the plurality of branch optical fiber bundles is formed at the plurality of output ends correspondingly, and the plurality of branch optical fiber bundles are wound around a portion facing away from the output ends to be formed at one input end.
The plurality of branch optical fiber bundles are arranged in a winding way at a part close to the output end or close to the input end, so that light emitted by the light source is uniformly coupled or uniformly separated through a winding arrangement structure after entering the corresponding branch optical fiber bundles.
The winding arrangement means that the optical fiber bundle is wound through preset parameters such as winding radius, winding mode, compactness and the like. The winding radius refers to the bending radius used when winding the optical fiber bundle; the winding radius may be expressed as the minimum bend radius allowed by the fiber bundle when winding. Tightness refers to the density of the fiber bundle relative to the axis of winding when wound; high tightness is indicated by tightly wound bundles and low tightness is indicated by loosely wound bundles. The winding mode refers to a path or a mode described by the winding process of the optical fiber bundle; the winding manner may be expressed as a spiral winding manner, i.e., a plurality of branched optical fiber bundles are arranged in a spiral around along one predetermined winding axis.
Optionally, when winding the plurality of branch optical fiber bundles, defining an expected starting point, an expected ending point and an expected path corresponding to each optical fiber bundle, and setting a corresponding identifier for each corresponding position information, so as to ensure that an actual starting point, an actual ending point and an actual path corresponding to each optical fiber bundle are all within an expected range.
Optionally, during the winding process, the position and state of the optical fiber bundle are monitored in real time, and the position of the abnormal optical fiber bundle is adjusted in time, so as to ensure that the optical fiber bundle is wound according to the expected setting. Further, after the winding process is completed, the fiber bundle may be tested and validated to ensure that the fiber bundle is placed in an actual winding result that matches the intended winding result.
Optionally, parameters such as winding radius, winding mode, compactness and the like can be selected as independent variables, the selected independent variables are valued according to different gradient intervals, the light source output efficiency corresponding to the independent variables in the different gradient intervals is respectively tested, and the optimal value range for the independent variables is obtained according to the test result.
Illustratively, the branched fiber bundles are not limited to a specific number, and a corresponding number of branched fiber bundles may be selected according to the actual light transmission requirements to implement the light source coupling or splitting function described above.
The light source may be an LED light source, and a plurality of light sources may be provided, where when the light source device is in an operating state, all the light sources may be selected to illuminate simultaneously, and the corresponding light sources may also be selected to illuminate according to actual illumination requirements.
The light source and the light source transmission module may be connected directly or through an optical element.
In this embodiment, by forming one ends of the plurality of branch optical fiber bundles into a plurality of target ends respectively, and winding the plurality of branch optical fiber bundles around a portion deviating from the target ends to form the other ends, the target ends and the other ends are any one of the input ends and the output ends respectively, light emitted from the light source is transmitted to the corresponding branch optical fiber bundle through the corresponding input end and is uniformly output through the output end, and coupling transmission or separation transmission of the light source can be achieved without adding other optical elements, and meanwhile, strong uniformity of the light at the output end is ensured, thereby improving the transmission efficiency of the light source.
In one exemplary embodiment, as shown in fig. 1, there is provided a light source apparatus including a plurality of light sources 101 and a light source transmission module 102.
One end of the light source transmission module 102 comprises a plurality of input ends 103, and the other end is a total output end 104; the plurality of input ends 103 are correspondingly connected with the plurality of light sources 101 one by one, and light emitted by each light source 101 is transmitted to the light source transmission module 102 through the corresponding input end 103 and is output through the total output end 104.
The light source transmission module 102 includes a plurality of branch optical fiber bundles, one ends of which are respectively formed into a plurality of input ends 103, and the plurality of branch optical fiber bundles are wound around a portion facing away from the input ends 103 to form a total output end 104; light emitted by the light sources 101 is transmitted to the corresponding branch optical fiber bundles through the corresponding input ends 103, and is output through the total output end 104.
Illustratively, a plurality of branch optical fiber bundles are arranged in a winding manner at a portion close to the output end, and light emitted by each light source pair is transmitted to the corresponding branch optical fiber bundle through the corresponding input end, and is output through one total output end after passing through the winding arrangement structure of each branch optical fiber bundle. Thus, the light emitted by each light source is in a uniformly coupled state at the total output end after passing through the winding arrangement, namely, the path of the light is changed along with the change of the path of the optical fiber bundles, and finally, the light emitted by different light sources tends to be in a transmission state of uniform mixing as a whole along with the mixed beam combining arrangement state of a plurality of branch optical fiber bundles at the total output end.
In this embodiment, by forming one ends of the plurality of branch optical fiber bundles into a plurality of input ends respectively, and winding the plurality of branch optical fiber bundles around the portion deviating from the input ends to form a total output end, light emitted by the plurality of light sources is transmitted to the corresponding branch optical fiber bundles through the corresponding input ends respectively and is output uniformly through the total output ends, and coupling transmission of the plurality of light sources can be achieved without adding other optical elements for coupling, and meanwhile, strong uniformity of light at the output ends is ensured, so that coupling and transmission efficiency of the light sources are improved.
Furthermore, in the above embodiment, the coupling transmission is performed on the light by selecting a plurality of optical fiber bundles which are wound, and other optical elements are not required to be added, so that the influence on the light transmission process due to the light absorption or light reflection characteristics of the optical elements is avoided; meanwhile, one end output can be realized by utilizing a plurality of branch optical fiber bundles, which is beneficial to reducing the volume of the light source device, simplifying the system design, reducing the precision requirement of the assembly process, and further improving the operation freedom degree and the cost performance of the system.
In an exemplary embodiment, as shown in fig. 2, there is further provided a light source device, which includes a light source 201 and a light source transmission module 202.
One end of the light source transmission module 202 is a total input end 203, and the other end of the light source transmission module comprises a plurality of output ends 204; the total input end 203 is correspondingly connected with the light source 201, and light emitted by the light source 201 is transmitted to the light source transmission module 202 through the total input end 203 and is output through the plurality of output ends 204.
The light source transmission module 202 includes a plurality of branch optical fiber bundles, one ends of the plurality of branch optical fiber bundles are respectively formed into a plurality of output ends 204, and the plurality of branch optical fiber bundles are wound at a portion facing away from the output ends 204 to form a total input end 203; light from the light source 201 is transmitted to the corresponding branch fiber bundles through the total input end 203 and is output through the plurality of output ends 204.
Illustratively, the plurality of branch optical fiber bundles are arranged in a winding manner at a portion close to the input end, so that the light emitted by the light source is transmitted to each branch optical fiber bundle through one total input end, and is output through each output end after passing through the winding arrangement structure of each branch optical fiber bundle. Thus, the light emitted from the light source, after passing through the winding arrangement, assumes a uniformly separated state at the output ends, that is, the path of the light moves along with the change of the path of the optical fiber bundles, and finally the light emitted from the light source tends to be a respectively uniformly mixed transmission state in each output end along with the mixed beam splitting arrangement state of the plurality of branched optical fiber bundles.
Optionally, in the case that the light uniformity of the light source is weak, the light uniformity in the output end corresponding to each split beam is relatively enhanced by splitting the optical fiber bundles in a mixed manner, so as to reduce the influence of the weak light uniformity of the light source.
Alternatively, fig. 2 illustrates the light source transmission module 202 as three branched fiber bundles, and the same light source separation function may be further implemented by other branched fiber bundles.
In this embodiment, one ends of the plurality of branch optical fiber bundles are respectively formed into a plurality of output ends, and the plurality of branch optical fiber bundles are wound around the portion deviating from the output ends to form a total input end, and light emitted by the light source is uniformly transmitted to the corresponding branch optical fiber bundles through the total input end and is output through the plurality of output ends, so that separation and transmission of the light source can be realized, and meanwhile, strong uniformity of the light at the output ends is ensured, thereby improving separation and transmission efficiency of the light source.
Furthermore, in the above embodiment, the light is separately transmitted by selecting a plurality of optical fiber bundles which are wound, and no other optical element is required to be added, so that the influence on the light transmission process due to the light absorption or light reflection characteristics of the optical element is avoided; meanwhile, multi-end output can be realized by utilizing one light source and a plurality of branch optical fiber bundles, which is beneficial to reducing the number of the light sources, reducing the volume of a light source device, simplifying the design of a system, reducing the precision requirement of an assembly process and further improving the operation freedom degree and the cost performance of the system.
In an exemplary embodiment, taking the light source device shown in fig. 1 as an example, each branched optical fiber bundle includes a plurality of optical fibers, one ends of the plurality of optical fibers are respectively formed at the plurality of input ends 103, and a portion of the plurality of optical fibers facing away from the input ends 103 is wound and arranged to be formed at the output end 104. Light emitted by the light sources is transmitted to the optical fibers through the corresponding input ends 103 and is output through the output ends 104.
Alternatively, all the optical fibers may be mixed and arranged in a spiral around along one predetermined winding axis.
When all the optical fibers are wound, the expected starting point, the expected ending point and the expected path corresponding to each optical fiber are defined, and corresponding marks are set on the corresponding position information, so that the actual starting point, the actual ending point and the actual path corresponding to each optical fiber are ensured to be in the expected range.
Under the condition that the number of the optical fibers is increased, the number density of the optical fibers corresponding to the output end is increased, so that all the optical fibers are more uniformly mixed and arranged at the output end, and light transmitted by each branch optical fiber bundle is more uniformly distributed at the output end.
Optionally, the number of optical fibers corresponding to each branched optical fiber bundle can be determined according to parameters such as winding radius, winding mode, compactness and the like of the optical fibers. It can be understood that the number of optical fibers corresponding to each branched optical fiber bundle can be used as an independent variable, values can be obtained according to different gradient intervals, the output efficiency of the light source corresponding to the number of the optical fibers in the different gradient intervals is respectively tested, and the optimal value range for the number of the optical fibers is obtained according to the test result.
In this embodiment, by arranging a plurality of optical fibers in the branched optical fiber bundle and winding the plurality of optical fibers, the number of optical fibers can be increased, thereby further improving the light uniformity of the light source in the coupling process.
In an exemplary embodiment, taking the light source device shown in fig. 2 as an example, each branched optical fiber bundle includes a plurality of optical fibers, one ends of the plurality of optical fibers are respectively formed at the plurality of output ends 204, and a portion of the plurality of optical fibers facing away from the output ends 204 is wound and arranged to be formed at the input end 203. Light from the light source is transmitted to a plurality of optical fibers through an input end 203 and is output through a plurality of output ends 204.
In this embodiment, by arranging a plurality of optical fibers in the branched optical fiber bundle and winding the plurality of optical fibers, the number of optical fibers can be increased, thereby further improving the light uniformity of the light source in the separation process.
In one exemplary embodiment, the corresponding plurality of optical fibers of each branched bundle are equally spaced at the input end or the output end.
In an exemplary embodiment, in a plurality of branch optical fiber bundles having a total input end corresponding to a plurality of output ends, a plurality of optical fibers corresponding to each branch optical fiber bundle are arranged at equal intervals on the total input end, i.e., a plurality of optical fibers corresponding to each branch optical fiber bundle are arranged at equal intervals on a cross section of the total input end.
In an exemplary embodiment, in a plurality of branch optical fiber bundles having a plurality of input ends corresponding to one total output end, a plurality of optical fibers corresponding to each branch optical fiber bundle are arranged at equal intervals on the total output end, i.e., a plurality of optical fibers corresponding to each branch optical fiber bundle are arranged at equal intervals on a section of the total output end.
Optionally, the optical fibers corresponding to each branch optical fiber bundle are arranged at equal intervals on each section corresponding to the path from the input end to the output end.
Optionally, the optical fibers corresponding to each branch optical fiber bundle are arranged in an array with the center of the input end or the output end as the center of the circle; furthermore, the optical fibers corresponding to each branch optical fiber bundle are arranged in a matrix at the input end or the output end according to a preset interval.
Optionally, all optical fibers corresponding to the plurality of branch optical fiber bundles can be wound randomly, so that each optical fiber is arranged randomly at the output end.
In this embodiment, the optical fibers corresponding to each branched optical fiber bundle are arranged at equal intervals at the output end, so as to ensure that the light emitted from the output end has strong uniformity in the coupling or separating process of the light source.
In an exemplary embodiment, the light source has a light surface shape that is adapted to the cut surface shape of the corresponding branched fiber bundle.
The light source surface refers to a surface from which the light source emits light. The section of the branched optical fiber bundle refers to the cross section of the optical fiber bundle; the cut surface of the branched optical fiber bundle may be expressed as a cross section corresponding to an end portion for inputting the light source. Adaptation is understood as the ability of the size, shape or configuration between objects to match, fit or fit each other to achieve a particular purpose or function; the adaptation of the light surface shape of the light source to the corresponding sectional shape of the branched optical fiber bundle may be expressed as that the light emitted from the light source can be efficiently transmitted to the branched optical fiber bundle based on the adapted light surface shape and sectional shape.
Illustratively, the light surface of the light source or the section of the branch optical fiber bundle is adjusted through the adaptation relation between the light surface shape of the light source and the section shape of the corresponding branch optical fiber bundle, so that the light energy emitted by the light source completely covers the input end of the branch optical fiber bundle, and the influence of gaps on the light uniformity is avoided.
By way of example, the light surface of the light source or the section of the branch optical fiber bundle is adjusted by the adaptation relationship between the light surface shape of the light source and the section shape of the corresponding branch optical fiber bundle, so that the light emitted by the light surface of the light source can completely fall into the section of the branch optical fiber bundle, thereby avoiding the leakage of light rays and causing the waste of the light source or the crosstalk of the light source.
Alternatively, as shown in fig. 3, when the cross section of the optical fiber bundle is circular, the shape of the light surface of the light source may be circular, and the size of the circular light surface may be adapted to the cross section of the optical fiber bundle, for example, the size of the circular light surface is greater than or equal to the cross section of the input end of the optical fiber bundle, so that the light emitted by the circular light surface can cover the optical fiber bundle with a circular cross section. It will be appreciated that in other embodiments, the light source may have an elliptical shape for mating with an elliptical cross-section fiber bundle, and is not further limited herein.
In this embodiment, the shape of the light surface of the light source is adapted to the shape of the section of the corresponding branch optical fiber bundle, so that the light source is ensured to completely and uniformly enter the branch optical fiber bundle, so as to improve the uniformity of light, and meanwhile, the waste of the light source caused by the fact that the size of the light surface of the light source is far larger than the size of the section of the optical fiber bundle can be reduced.
The coupling efficiency of the light source device of any one or a combination of the above embodiments is further explained as follows:
as shown in fig. 4, according to the cosine law of the luminous intensity, the LED light source emits light in a single-sided manner, and the total luminous flux corresponds to the emitted lightThe method comprises the following steps:
wherein,expressed as light brightness +.>Represented as light emitting areas.
Due to the parameter definition of the numerical aperture of the optical fiber bundle, the LED light source is positioned at the half vertex angleLight emitted in the corresponding cone can be coupled into the optical fiber bundle for transmission, and the half apex angle is +>Luminous flux of the corresponding conical internal radiation>The method comprises the following steps:
further, the coupling efficiency of the optical fiber bundle to the LED light source can be obtainedThe method comprises the following steps:
according to the object space invariance, namely Lagrangian invariance:
wherein,light surface size expressed as LED light source, +.>Expressed as the cross-sectional dimension of the fiber bundle, +.>Expressed as the spatial refractive index of the LED object space, < >>Expressed as refractive index of the spatial fiber bundle at image side, < >>Represented as the numerical aperture of the fiber bundle.
The method can obtain:
finally, the coupling efficiency of the fiber bundle to the LED light sourceThe method comprises the following steps:
(1)
From formula (1), coupling efficiencySquare of the numerical aperture of the bundle>In proportion to the light surface of the LED light sourceSize->Inversely proportional to the cross-sectional dimension of the fiber optic bundle +.>Proportional to the ratio.
Thus, in any of the above embodiments, when the light surface size of the light source is equal to the cut surface size of the optical fiber bundle, the coupling efficiency between the light source and the optical fiber bundle is only related to the numerical aperture of the optical fiber bundle, and increases as the numerical aperture of the optical fiber bundle increases.
For example, in formula (1), the size of the light surface of the LED light sourceCross-sectional dimension of fiber bundle->In the same case, the light source transmission efficiency +.>64%.
Therefore, in any of the above embodiments, when the light surface size of the light source is smaller than the cut surface size of the optical fiber bundle, the coupling efficiency between the light source and the optical fiber bundle tends to a stable value based on the characteristics of the LED light source itself. Wherein the stable value is expressed as a mutual adaptation between the output capacity of the light source and the receiving capacity of the optical fiber bundle, so that the optical coupling between the light source and the optical fiber bundle reaches a relatively stable state, thereby avoiding drastic fluctuations due to small variations in the parameters.
In this embodiment, the desired light source coupling efficiency is obtained efficiently by adjusting the numerical relationship between the light source light face size and the fiber bundle size.
In one exemplary embodiment, a medical endoscope system is provided that includes a light source device, an endoscope body, an imaging device, and a display device.
The endoscope body is connected with the output end of the light source device, and the light output by the light source is transmitted to the endoscope body through the output end of the light source device, and is output through the front end of the endoscope body and irradiates the object to be observed.
The image pickup device is arranged at the front end of the endoscope body and is in communication connection with the display device, obtains an image of an object to be observed under the illumination environment provided by the light source device, and transmits the image to the display device for display.
The endoscope body comprises a light guide component, light emitted by the light source device is transmitted to the light guide component of the endoscope body through the output end and is transmitted to the front end of the endoscope body through the light guide component, so that an object to be observed, of which the front end corresponds to the visual field range, of the endoscope body is irradiated.
Alternatively, after the image capturing apparatus obtains an image of an object to be observed, the image may be processed by a computer software or hardware circuit having an image processing function, thereby improving contrast, brightness, and color balance in the image, and removing noise and artifacts.
Alternatively, the generated images may be stored in a database for archiving and recording by medical personnel. Further, the generated image and the corresponding optical parameters can be stored in a database in an associated manner, so that the optical parameter setting is analyzed according to the actual imaging quality, and the optimal optical parameters are obtained; the optical parameters of the light source transmission module can include parameters such as light intensity, light source color, light source stability and the like, and the optical parameters of the light source transmission module can include parameters such as the number of optical fiber bundles, the number of optical fibers, the optical fiber density corresponding to an input end, the optical fiber density corresponding to an output end, the optical fiber winding degree and the like.
In this embodiment, the light source device is applied to a medical endoscope system, and based on the advantages of the light source device in terms of light uniformity and light transmission efficiency, the imaging quality corresponding to the obtained image is improved in the illumination environment provided by the light source device.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the present application. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application shall be subject to the appended claims.

Claims (10)

1. A light source device, the device comprising:
a light source;
the light source transmission module is characterized in that one end part of the light source transmission module is an input end, the other end part of the light source transmission module is an output end, the input end is correspondingly connected with the light source, and light emitted by the light source is transmitted to the light source transmission module through the input end and is output through the output end;
the light source transmission module comprises a plurality of branch optical fiber bundles, wherein one ends of the plurality of branch optical fiber bundles are respectively formed at a target end, and the target end comprises any one of the input end and the output end; the parts of the plurality of branch optical fiber bundles, which deviate from the target end, are wound and arranged to form at the other end, and the other end comprises the other one of the input end and the output end except the target end;
the light emitted by the light source is transmitted to each branch optical fiber bundle through the input end and is output through the output end.
2. The apparatus of claim 1, wherein said target ends of a plurality of said branch optical fiber bundles are input ends, said other ends of a plurality of said branch optical fiber bundles are output ends, said plurality of branch optical fiber bundles are wound around a portion adjacent to said output ends to form a total output end; the light sources comprise a plurality of light sources, each light source corresponds to each input end respectively, and light emitted by the light sources is transmitted to the corresponding branch optical fiber bundles through the corresponding input ends respectively and is output through the total output ends.
3. The apparatus of claim 1, wherein said target ends of said plurality of said branch optical fiber bundles are each an output end, said other ends of said plurality of said branch optical fiber bundles are each an input end, and said plurality of said branch optical fiber bundles are arranged in a winding manner at a portion adjacent to said input ends to form a total input end; the light emitted by the light source is transmitted to the corresponding branch optical fiber bundles through the total input end and is output through the plurality of output ends.
4. A device according to any one of claims 1 to 3, wherein each branched optical fibre bundle comprises a plurality of optical fibres, one end of each of which is formed at the target end; the parts of the optical fibers, which deviate from the target end, are wound and arranged to form at the other end;
the light emitted by the light source is transmitted to the optical fibers through the input end and is output through the output end.
5. The apparatus of claim 4, wherein the corresponding ones of the plurality of optical fibers of each branch optical fiber bundle are equally spaced at the input end and/or the output end.
6. The device according to claim 5, wherein the optical fibers corresponding to each branch optical fiber bundle are arranged in a matrix at the input end and/or the output end according to a preset interval.
7. A device according to any one of claims 1 to 3, wherein the light source has a smooth surface shape adapted to the cross-sectional shape of the corresponding branched optical fiber bundle.
8. The apparatus of claim 7, wherein the coupling efficiency between the light source and the branch fiber bundle increases as the numerical aperture of the branch fiber bundle increases when the light source has a light surface size equal to a cut surface size of the corresponding branch fiber bundle.
9. A medical endoscope system comprising an endoscope body, and the light source device according to any one of claims 1 to 8;
the endoscope body is connected with the output end of the light source device, and the light output by the light source device is transmitted to the endoscope body through the output end of the light source device, and is output through the front end of the endoscope body and irradiates an object to be observed.
10. The system of claim 9, further comprising a camera device and a display device;
the image pickup device is arranged at the front end of the endoscope body and is connected with the display device, and the image pickup device obtains the image of the object to be observed under the illumination environment provided by the light source device and transmits the image to the display device for display.
CN202311489499.2A 2023-11-09 2023-11-09 Light source device and medical endoscope system Pending CN117357048A (en)

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Application Number Priority Date Filing Date Title
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