CN217932270U - Light source device and endoscope system - Google Patents
Light source device and endoscope system Download PDFInfo
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- CN217932270U CN217932270U CN202221636840.3U CN202221636840U CN217932270U CN 217932270 U CN217932270 U CN 217932270U CN 202221636840 U CN202221636840 U CN 202221636840U CN 217932270 U CN217932270 U CN 217932270U
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Abstract
The application provides a light source device and an endoscope system, including: an LED light source for emitting a first light beam; a laser light source for emitting a second light beam; a first wavelength conversion element for converting at least part of the first light beam into first stimulated light having a wavelength range different from that of the first light beam; a second wavelength conversion element for converting at least part of the second light beam into second stimulated light having a wavelength range different from that of the second light beam; a collecting lens assembly for collecting the first excited light and the second excited light, and emitting the first excited light and the second excited light after reducing divergence angles; and the coupling element is arranged on the light-emitting side of the collecting lens component and is used for coupling the first stimulated light and the second stimulated light to the inlet end of the optical fiber. By the mode, the brightness and the color rendering index of the endoscope light source can be improved.
Description
Technical Field
The application belongs to the field of light sources, and particularly relates to a light source device and an endoscope system.
Background
The LED light source has the advantages of long service life, high color rendering index and the like, and the endoscope system in the prior art generally uses the LED light source as the light source, specifically, the LED light excites fluorescent powder to generate fluorescence, then optical elements such as a light guide or a lens are used for converging fluorescent light spots, and the converged fluorescence is projected to an optical fiber bundle.
However, the power density of the LED light source is low, which easily causes the brightness of the endoscope light source to be low; the method for improving the fluorescence coupling efficiency by increasing the diameter of the optical fiber bundle is easy to cause the caliber of the endoscope to be larger, and further the size of the endoscope is increased.
SUMMERY OF THE UTILITY MODEL
The technical problem mainly solved by the application is to provide a light source device and an endoscope system, which can improve the brightness and the color rendering index of an endoscope light source.
In order to solve the above technical problem, the present application provides a light source device, including: an LED light source for emitting a first light beam; a laser light source for emitting a second light beam; a first wavelength conversion element for converting at least part of the first light beam into first stimulated light having a wavelength range different from that of the first light beam; a second wavelength conversion element for converting at least part of the second light beam into second stimulated light having a wavelength range different from that of the second light beam; a collecting lens assembly for collecting the first stimulated light and the second stimulated light, reducing divergence angles of the first stimulated light and the second stimulated light, and emitting the first stimulated light and the second stimulated light; and the coupling element is arranged on the light-emitting side of the collecting lens component and is used for coupling the first stimulated light and the second stimulated light to the inlet end of the optical fiber.
Preferably, the first light beam and the second light beam are monochromatic lights having the same color.
Preferably, the first stimulated emission light and the second stimulated emission light have different wavelength ranges.
Preferably, the light source device includes a light directing element disposed on an optical path of the second light beam for changing a traveling direction of the second light beam and directing the second light beam to the second wavelength conversion element.
Preferably, the light directing element comprises: and the light reflector is arranged on the light emitting side of the collecting lens assembly.
Preferably, the first wavelength conversion element includes a red phosphor patch, and the red phosphor patch is disposed on an optical path of the first light beam.
Preferably, the collecting lens assembly comprises: a first collecting lens disposed on the light-emitting side of the first wavelength conversion element, and a second collecting lens disposed on the light-emitting side of the second wavelength conversion element.
Preferably, the light source device includes a heat sink substrate, and the second wavelength conversion element is disposed on the heat sink substrate.
Preferably, the LED light source is disposed on the heat sink substrate.
Preferably, the light source device includes a light homogenizing assembly, and the light homogenizing assembly and the coupling element are sequentially disposed along the optical paths of the first excited light and the second excited light.
Preferably, the light homogenizing assembly includes a fly-eye lens.
In order to solve the above technical problem, the present application provides an endoscope system including the above light source device.
The beneficial effect of this application is: different from the prior art, this application adopts laser source and LED light source as the light source of light source device, and throws the produced first light beam of LED light source and the produced second light beam of laser source to first wavelength conversion component and second wavelength conversion component respectively, produces and jets out first excited light and second and receives the laser. The laser light source has the characteristic of high power density, so that the second excited light generated by the excitation of the second light beam has the advantage of high brightness; and the spectrum to the second receives laser is narrower, the lower shortcoming of color rendering index, this application uses the first light beam excitation that the LED light source produced simultaneously to produce first receiving laser, and the second that the second light beam excitation produced receives laser, and do not convert into the first part first light beam that receives laser and assemble to the entry end of optic fibre, form the emergent light, and then realize that the emergent light mixes the fluorescence that has the laser excitation production, the fluorescence that the LED light excitation produced reaches the LED light that is not converted into fluorescence, consequently can improve the luminance and the color rendering index of light source device emergent light simultaneously.
Drawings
FIG. 1 is a schematic view of a first embodiment of a light source device according to the present application;
fig. 2 is a schematic structural diagram of a light source device according to a second embodiment of the present application.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be noted that the following examples are only illustrative of the present application, and do not limit the scope of the present application. Likewise, the following examples are only some examples of the present application, not all examples, and all other examples obtained by a person of ordinary skill in the art without making any creative effort fall within the protection scope of the present application.
The terms "first," "second," "third," "fourth," and the like in the description and claims of this application and in the above-described drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In a conventional endoscope system, a blue LED is generally used to excite a phosphor to generate fluorescence, and a fluorescent spot is converged by an optical element such as a light guide or a lens and then incident on an optical fiber. Although the LED light source has the advantages of long service life, high color rendering index and the like, the power density is low, so that the brightness of the generated fluorescent light spot is low. If the coupling efficiency of fluorescence is improved by increasing the diameter of the optical fiber, the aperture of the endoscope in the endoscope system is increased.
To solve the above technical problems, the present application proposes the following embodiments.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a light source device according to a first embodiment of the present application.
As shown in fig. 1, the light source device 100 includes: an LED light source 110 for emitting a first light beam; a laser light source 120 for emitting a second light beam; a first wavelength conversion element 130 for converting at least part of the first light beam into a first stimulated light having a wavelength range different from that of the first light beam; a second wavelength conversion element 140 for converting at least part of the second light beam into a second stimulated light having a wavelength range different from that of the second light beam; a collecting lens assembly 150 for collecting the first excited light and the second excited light, and emitting the first excited light and the second excited light after reducing divergence angles thereof; and a coupling element 160 disposed on the light-emitting side of the collecting lens assembly 150 for coupling the first excited light and the second excited light to the entrance end of the optical fiber 101.
In this embodiment, the first light beam and the second light beam may be monochromatic lights with the same color. For example, the LED light source 110 may be a blue LED light source with a wide spectrum, and the specific spectrum range may be 400 to 490nm, and the laser light source 120 may be a blue laser light source, so that the spectrum range of the second excited light generated by the second light beam exciting the second wavelength conversion element 140 is 480 to 700nm, and further, the spectrum of the blue waveband in the emergent light may be supplemented by the light energy generated by the LED light source 110.
Specifically, the laser light source 120 may also be set as a laser light source of another color, and then the setting of the second wavelength conversion element 140 is flexibly adjusted according to the selected wavelength range of the second light beam generated by the laser light source 120, so as to realize that the spectral range of the second received laser light generated by the second wavelength conversion element 140 excited by the second light beam is 480-700nm, which is not limited herein.
Further, the first wavelength conversion element 130 and the second wavelength conversion element 140 may be configured to include at least one phosphor, specifically, a green phosphor, a yellow phosphor, a red phosphor, and the like, so that the first excited light and the second excited light generated by the corresponding excitation of the first light beam and the second light beam include fluorescence with corresponding colors, and the specific phosphor may be flexibly configured according to different application scenarios, which is not limited herein.
For example, the first wavelength conversion element 130 may include a red phosphor sheet (not shown), the second wavelength conversion element 140 may include a yellow phosphor sheet (not shown), and the red phosphor sheet may be disposed on the optical path of the first light beam, such that the first stimulated light generated by the first light beam exciting the first wavelength conversion element 130 includes red light, and the second stimulated light generated by the second light beam exciting the second wavelength conversion element 140 includes yellow light, and the second stimulated light and the remaining second light beam are mixed to form white light, where the formed white light has a spectrum shortage problem corresponding to red light, and the first stimulated light generated by the first light beam exciting the first wavelength conversion element 130 may complement a spectrum of the formed white light, so as to improve color rendering.
In this embodiment, the LED light source 110 and the first wavelength conversion element 130, and the laser light source 120 and the second wavelength conversion element 140 may also be flexibly disposed, so that the first excited light and the second excited light have different wavelength ranges.
Specifically, the second light beam is projected onto the second wavelength conversion element 140 to be excited to generate the second stimulated light, and a wavelength range of a mixed light composed of the second stimulated light and the second light beam is 480-700nm, so as to meet an emergent light requirement of the light source device 100, that is, the laser light generated by the laser light source 120 can be projected onto the second wavelength conversion element 140 to be excited to generate the second stimulated light including yellow light. Further, in an application scenario where the LED light source 110 and the laser light source 120 are both blue light sources, and the first wavelength conversion element 130 includes a red phosphor patch, the first light beam generated by the LED light source 110 can be projected onto the red phosphor patch to excite and generate a first stimulated light including red light, and then the first stimulated light can supplement a spectrum of a red waveband in the emergent light.
In some specific application examples, the red phosphor sheet may be directly disposed on an exit surface of the LED light source 110 for emitting the first light beam, or the red phosphor may be directly coated on the exit surface of the LED light source 110 for emitting the first light beam, without disposing the red phosphor sheet, which is not limited herein.
Further, the second light beam generated by the laser light source 120 may be arranged to be directly incident obliquely on the second wavelength conversion element 140 to excite the generation of the second stimulated light. It may be further provided that the light source device 100 includes a light directing element 170 disposed on the optical path of the second light beam for changing the traveling direction of the second light beam and projecting the second light beam to the second wavelength conversion element 140.
In this embodiment, the light directing element 170 may be arranged to comprise a light reflector, such as a mirror, and the light reflector may further be arranged at the light exit side of the collecting lens assembly 150. In this application, a side of the collection lens assembly 150 on which the first and second stimulated lights are incident is defined as a light incident side of the collection lens assembly 150, and a side of the collection lens assembly 150 on which the first and second stimulated lights are emitted after being transmitted by the collection lens assembly 150 is defined as a light emitting side of the collection lens assembly 150.
Further, in some specific application scenarios, the light directing element 170 may also be at least one of a dichroic mirror, a prism, and an optical fiber, which is not limited herein.
In some specific embodiments, the light source device 100 may further include a light directing element 170, and the second light beam generated by the laser light source 120 may be directly obliquely incident on the second wavelength conversion element 140 by adjusting the setting position of the laser light source 120, which is not described herein again.
Further, in the present embodiment, it may be further provided that the light source device 100 includes a heat sink substrate 180, and the second wavelength conversion element 140 is disposed on the heat sink substrate 180.
By disposing the second wavelength conversion element 140 directly on the heat sink substrate 180, the second wavelength conversion element 140 can withstand a higher power density, and thus the second wavelength conversion element 140 can withstand a higher optical power density of the laser light projected by the laser light source 120. The second wavelength conversion element 140 can receive the laser beam with higher optical power density, so that the optical power density of the light beam that can be received at the side of the entrance end of the optical fiber 101 is higher, which is more favorable for improving the brightness of the emergent light beam of the light source apparatus 100.
Specifically, in an application scenario where the first wavelength conversion element 130 includes a red phosphor patch, the power density that can be endured by the red phosphor on the red phosphor patch is low, and therefore, the red phosphor is disposed on the light path of the first light beam, and the first light beam can be projected onto the red phosphor patch and excite to generate the first excited light including red light, which can supplement the red light in the light beam emitted from the light source device 100, and further can enable the light source device 100 to output more red light.
Further, in the present embodiment, the LED light source 110 may also be disposed on the heat sink substrate 180.
As shown in fig. 1, the LED light source 110 and the second wavelength conversion element 140 are both disposed on the heat sink substrate 180, and the heat sink substrate 180 may be disposed on a side away from the light beams emitted from the LED light source 110 and the second wavelength conversion element 140, so as to not affect the emission of the first light beam and the second stimulated light, and simultaneously dissipate heat generated by the LED light source 110 and the second wavelength conversion element 140, reduce the accumulation of heat on the LED light source 110 and the second wavelength conversion element 140, and improve the reliability of the light source apparatus 100.
Further, light source device 100 may further include light homogenizing assembly 190, and light homogenizing assembly 190 and coupling element 160 are sequentially disposed along the optical paths of the first excited light and the second excited light.
In this embodiment, light homogenizing assembly 190 can be configured to include a fly-eye lens. In some specific application scenarios, light homogenizing assembly 190 may also include a single fly-eye lens, may also include both a double fly-eye lens and a single fly-eye lens, and may also include other optical elements or combinations of optical elements with a light homogenizing effect, which is not limited herein.
Specifically, the first light beam excites the first wavelength conversion element 130 to generate the first stimulated light, the first light beam not converted into the first stimulated light is at least partially transmitted through the first wavelength conversion element 130, the second light beam excites the second wavelength conversion element 140 to generate the second stimulated light, and the second light beam not converted into the second stimulated light is at least partially transmitted through the second wavelength conversion element 140. The light homogenizing assembly 190 and the coupling element 160 are sequentially disposed along the light paths of the first excited light and the second excited light, so that the first excited light, the second excited light, at least a portion of the first light beam transmitted through the first wavelength conversion element 130, and at least a portion of the second light beam transmitted through the second wavelength conversion element 140 can be first projected to the light homogenizing assembly 190, and then coupled to one side of the inlet end of the optical fiber 101 through the coupling element 160 after being homogenized by the light homogenizing assembly 190, thereby realizing more uniform color and brightness of light spots projected to one side of the inlet end of the optical fiber 101.
Further, in this embodiment, the collecting lens assembly 150 may be further disposed on the optical path of the first excited light and the second excited light for reducing the divergence angle of the first excited light and the second excited light, as shown in fig. 1, the collecting lens assembly 150 may be specifically disposed between the light homogenizing assembly 190 and the LED light source 110.
As shown in fig. 1, a collecting lens assembly 150 may be further disposed on the optical path of the second light beam, and the second light beam generated by the laser light source 120 may be collected by the collecting lens assembly 150 and then projected onto the second wavelength conversion element 140 to excite the second stimulated light to generate the second stimulated light.
In some specific application examples, the second light beam generated by the laser light source 120 may also be reflected by the light directing element 170 or directly projected onto the second wavelength conversion element 140 without passing through the collecting lens assembly 150 to generate the second stimulated light, which is not limited herein.
Further, collection lens assembly 150 may be disposed in the optical path of the first light beam, the first stimulated light, and the second stimulated light, between light homogenizing assembly 190 and LED light source 110. In an application scenario where the first wavelength conversion element 130 is a red phosphor sheet, the first light beam generated by the LED light source 110 excites the first stimulated light generated by the red phosphor sheet, at least a part of the first light beam transmitted through the first wavelength conversion element 130, the second stimulated light, and at least a part of the second light beam transmitted through the second wavelength conversion element 140, and after mixing, the mixture can be projected to the collecting lens assembly 150, and after being collected by the collecting lens assembly 150, the mixture can be projected to the light homogenizing assembly 190, so that the light beam coupled to the optical fiber 101 can obtain a better homogenizing effect.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a light source device according to a second embodiment of the present application.
As shown in fig. 2, in the present embodiment, the light source apparatus 200 includes an LED light source 210, a laser light source 220, a first wavelength conversion element 230, a second wavelength conversion element 240, a coupling element 260, a light homogenizing assembly 290, a collecting lens assembly 250, a light directing element 270, and an optical fiber 201. In this embodiment, the arrangement of the light homogenizing assembly 290, the LED light source 210, the first wavelength conversion element 230, the second wavelength conversion element 240, the laser light source 220, the light directing element 270, the light homogenizing assembly 290, the coupling element 260 and the optical fiber 201 may be the same as that in the first embodiment, and will not be described herein again.
Further, in the present embodiment, it may be provided that the collecting lens assembly 250 comprises a first collecting lens 251 disposed at the light exit side of the first wavelength converting element 230, and a second collecting lens 252 disposed at the light exit side of the second wavelength converting element 240.
Specifically, in the present embodiment, as shown in fig. 2, the first collecting lens 251 may be disposed on the optical path of the first light beam and the first stimulated light, and located between the light homogenizing assembly 290 and the LED light source 210, and further the first collecting lens 251 may converge the first light beam generated by the LED light source 210 and the first stimulated light generated by the first light beam exciting the first wavelength conversion element 230, and the converged first stimulated light may be projected to the light homogenizing assembly 290 to be homogenized by the light homogenizing assembly 290.
Further, the second collecting lens 252 may be disposed on the light path of the second received laser light and located between the light homogenizing assembly 290 and the second wavelength converting element 240, and then the second collecting lens 252 may converge the second light beam generated by the laser light source 220, and may converge the second received laser light generated by the excitation of the second light beam projected onto the second wavelength converting element 240, and the converged second received laser light is also projected onto the light homogenizing assembly 290 and is homogenized by the light homogenizing assembly 290.
The homogenized first excited light and second excited light may be coupled to the optical fiber 201 through the coupling element 260, and guided through the optical fiber 201 to form the outgoing light of the light source apparatus 200.
In some specific application examples, the second collecting lens 252 may be disposed only on the optical path of the second stimulated light, and only the second stimulated light is converged.
Specifically, the second light beam generated by the laser light source 220 may be directly projected onto the second wavelength conversion element 240, and the second collecting lens 252 does not need to converge the second light beam; alternatively, the second collecting lens 252 is not disposed on the light path of the second light beam generated by the laser source 220 after being reflected by the light directing element 270, and the second collecting lens 252 does not converge the second light beam. The above two cases are merely examples, and the specific arrangement of the second collecting lens 252 is not limited herein.
Different from the first embodiment, in the present embodiment, it may be further provided that the heat sink substrate 280 includes a first heat sink substrate 281 and a second heat sink substrate 282, and the LED light source 210 is disposed on the second heat sink substrate 282.
In particular, in an application scenario where the first wavelength conversion element 230 is a red phosphor patch, the LED light source 210 and the red phosphor patch may both be disposed on the first heat sink substrate 281, and the second wavelength conversion element 240 may be disposed on the second heat sink substrate 282. The second light beam generated by the laser light source 220 is projected to the second wavelength conversion element 240 to be excited to generate the second excited light, which generates more heat, and the first heat sink substrate 281 and the second heat sink substrate 282 are disposed, so that the LED light source 210 and the second wavelength conversion element 240 can be separately cooled, and the cooling efficiency of the light source device 200 is further improved.
In order to solve the above technical problem, the present application provides an endoscope system including the above light source device.
To sum up, the LED light source and the laser light source are set as the light source of the light source device, and the first wavelength conversion element and the second wavelength conversion element are used to respectively convert the first light beam generated by the LED light source and the second light beam generated by the laser light source into the first stimulated light and the second stimulated light, so that the light beam coupled into the optical fiber by the light source device includes the second stimulated light of the laser conversion, the first stimulated light of the LED light conversion and the LED light which is not converted into the first stimulated light, and the emergent light beam of the light source device has the advantages of high laser light beam brightness and high color rendering index of the LED light; when the light source device is applied to an endoscope system, the emergent light spot based on the light source device has the advantage of good focusing effect of the laser light spot, the diameter of the optical fiber can be reduced, and the size of the endoscope can be reduced; meanwhile, the emergent light spot of the light source device has the characteristics of high brightness of the laser light spot and high color development of the LED light spot, so that the endoscope can display substances with various colors, and the using effect of the endoscope is improved.
The above description is only for the purpose of illustrating embodiments of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application or are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.
Claims (12)
1. A light source device, comprising:
an LED light source for emitting a first light beam;
a laser light source for emitting a second light beam;
a first wavelength conversion element for converting at least part of the first light beam into first stimulated light having a wavelength range different from the first light beam;
a second wavelength conversion element for converting at least part of the second light beam into second stimulated light having a wavelength range different from that of the second light beam;
the collecting lens assembly is used for collecting the first excited light and the second excited light, reducing divergence angles of the first excited light and the second excited light and emitting the first excited light and the second excited light;
and the coupling element is arranged on the light outlet side of the collecting lens component and is used for coupling the first stimulated light and the second stimulated light to the inlet end of the optical fiber.
2. The light source device of claim 1, wherein the first light beam and the second light beam are monochromatic lights having the same color.
3. The light source device according to claim 1, wherein the first excited light and the second excited light have different wavelength ranges.
4. The light source device according to claim 1, wherein the light source device comprises a light directing element disposed on an optical path of the second light beam for changing a traveling direction of the second light beam and directing the second light beam to the second wavelength converting element.
5. The light source device of claim 4, wherein the light directing element comprises: a light reflector disposed on a light exit side of the collection lens assembly.
6. The light source device of claim 1, wherein the first wavelength conversion element comprises a red phosphor patch disposed on an optical path of the first light beam.
7. The light source apparatus of claim 1, wherein the collection lens assembly comprises: the first wavelength conversion element is arranged on the light emitting side of the first light source, and the second wavelength conversion element is arranged on the light emitting side of the second light source.
8. The light source device according to claim 1, wherein the light source device comprises a heat sink substrate on which the second wavelength conversion element is disposed.
9. The light source device of claim 8, wherein the LED light source is disposed on the heatsink substrate.
10. The light source device according to any one of claims 1 to 9, wherein the light source device comprises a light homogenizing assembly, and the light homogenizing assembly and the coupling element are sequentially arranged along the optical paths of the first stimulated light and the second stimulated light.
11. The light source device of claim 10, wherein the light homogenizing assembly comprises a fly's eye lens.
12. An endoscope system comprising a light source device according to any one of claims 1 to 11.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221636840.3U CN217932270U (en) | 2022-06-27 | 2022-06-27 | Light source device and endoscope system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221636840.3U CN217932270U (en) | 2022-06-27 | 2022-06-27 | Light source device and endoscope system |
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| CN217932270U true CN217932270U (en) | 2022-11-29 |
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| CN202221636840.3U Active CN217932270U (en) | 2022-06-27 | 2022-06-27 | Light source device and endoscope system |
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