CN218500685U - Light guide device, illumination assembly and endoscope system - Google Patents

Abstract

The utility model discloses a light guide device, transmission direction through making the at least partial light of illuminating beam changes, make illuminating beam's at least partial light redistribute at the exit, when the incident facula at illuminating beam is less than the terminal surface of light guide device's incident end, illuminating beam's the form of excident facula is corresponding with light guide device's the form of excident end, can avoid the influence of illuminating beam's the form of incident facula, the shape of excident and the corresponding excident facula of size all the time. Furthermore, when the utility model provides a light guide device is used for transmitting polychrome illuminating beam, even if the various colour facula of the incident end that incides the light guide device do not overlap completely, also can output the even illuminating spot of colour mixture to can correct the problem of off colour. The utility model discloses still disclose an illumination assembly and an endoscope system.

Description

Light guide device, illumination assembly and endoscope system

Technical Field

The utility model relates to an endoscope technical field especially relates to a leaded light device, an illumination component and an endoscope system.

Background

The endoscope is an examination device widely applied in the medical field, can enter a cavity through a pore channel or a small incision made by an operation, can directly peep the condition of a relevant part in the body, and can be used by a doctor for observing the pathological change condition in the cavity and diagnosing diseases.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a conventional endoscope system, which at least includes a light source 10 and a scope body. The light source 10 may be a multi-wavelength light source, and is configured to output multi-color illumination light to meet the illumination requirements of various imaging modes. The scope body is used for performing endoscopy and comprises a light guide part 11, an operation part 14 and an insertion part 13 which are connected in sequence, wherein a light guide optical fiber 12 penetrates through the light guide part 11, the operation part 14 and the insertion part 13. After the light guide part 11 is connected with the light source 10, the illumination light output by the light source 10 is coupled into the light guide fiber 12, transmitted to the distal end of the insertion part 13 through the light guide fiber 12 and emitted out to irradiate into the cavity, so that the condition in the cavity can be observed through the endoscope.

In practical applications, since the light guide fiber 12 disposed in the mirror body is relatively long, and the optical energy loss is relatively high in the light conduction process, in order to ensure the light output amount of the mirror body, the light source 10 generally needs to use a high-power light emitting chip, which results in a large overall size of the light source 10 and a need to develop a separately used light source, and the cost is relatively high; in addition, the light flux output from the light source 10 is large, and the coupling loss generated at the portion connected to the lens body is increased accordingly, which may cause the temperature of the light guide portion 11 to be high, thereby possibly causing scald to the human body.

In order to solve the above-described problems of the endoscope, it is proposed to incorporate a light source in the scope body, for example, to provide the light source in an operation portion of the scope body. The light emitting chips with small size and small light emitting area can only be selected to provide the illuminating light beams of all wave bands by being limited by the installation/containing space of the light source.

However, in the course of development, the inventors of the present application found that: when a multi-wavelength light source with small volume and small light-emitting area is adopted, the problem of color cast of illumination light spots emitted by the mirror body is easy to occur, and the imaging effect is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a light guide device can avoid the influence of illuminating beam's incident facula, the shape and the corresponding emergent facula of size of emergent and exit end all the time, and then, even if incide the incomplete overlapping of all kinds of incident facula of light guide device, also can output the even illumination facula of colour mixture, corrects the problem of off colour. The utility model also provides an illumination assembly and an endoscope system.

In order to achieve the above purpose, the utility model provides a following technical scheme:

a light guide device is used for guiding an illumination light beam emitted by a light source, and is provided with an incident end and an emergent end, wherein the incident end is used for being coupled with the light source so as to receive the illumination light beam, and the illumination light beam is transmitted by the light guide device and then is emitted from the emergent end;

the light guide device is further configured to change a transmission direction of at least some light rays in the illumination light beam, so that the at least some light rays are redistributed at the exit end, and when an incident light spot of the illumination light beam is smaller than an end face of the incident end, a form of the exit light spot of the illumination light beam corresponds to a form of the exit end.

Optionally, the light guide device includes:

a fiber optic bundle for transmitting the illumination beam;

and the light mixing component is connected with the optical fiber bundle and is used for changing the transmission direction of at least part of light rays of the illumination light beams.

Optionally, the light mixing component includes a light homogenizing rod with a cavity inside, and is used for enabling the illumination light beam to be reflected for multiple times.

Optionally, the light mixing component comprises a birefringent light homogenizing rod for making the illumination light beam totally reflect for a plurality of times.

Optionally, the light mixing component comprises a light-transmitting lens for scattering the illumination light beam.

Optionally, the light mixing component is disposed on an optical path between the light source and the optical fiber bundle, or/and the light mixing component is disposed on an outgoing optical path of the optical fiber bundle.

Optionally, the optical fiber bundle is a hybrid optical fiber bundle, the hybrid optical fiber bundle includes a plurality of optical fibers, and an arrangement position of an exit end of at least some of the optical fibers in the plurality of optical fibers at the exit end of the hybrid optical fiber bundle is different from an arrangement position of an incident end of the optical fiber at the incident end of the hybrid optical fiber bundle.

Optionally, the light guide device includes a hybrid fiber bundle, the hybrid fiber bundle includes a plurality of optical fibers, and an arrangement position of an exit end of at least some of the optical fibers in the plurality of optical fibers at the exit end of the hybrid fiber bundle is different from an arrangement position of an incident end of the optical fiber at the incident end of the hybrid fiber bundle.

Optionally, the at least part of the optical fibers are optical fibers located at the periphery of the hybrid fiber bundle.

Optionally, an arrangement position of an exit end of each optical fiber in the hybrid fiber bundle at the exit end of the hybrid fiber bundle is different from an arrangement position of an incident end of the optical fiber at the incident end of the hybrid fiber bundle.

A lighting assembly comprising a light source and a light guide as described above.

Optionally, the light source is a multi-wavelength light source, and is configured to emit at least two color illumination light beams to the light guide device, where incident light spots of the illumination light beams of each color incident on the light guide device do not completely overlap.

An endoscopic system comprising: the light source is arranged in the mirror body, and the light guide device is arranged in the mirror body in a penetrating manner and extends to the far end of the mirror body.

Optionally, the light source is disposed at an operation portion of the mirror body.

According to the above technical scheme, the beneficial effects of the utility model reside in that:

the utility model provides a transmission direction of light guide device through making the at least partial light of illuminating beam changes, make the at least partial light of illuminating beam redistribute at the exit, with when the incident facula of illuminating beam is less than the terminal surface of the incident end of light guide device, the form of the emergent facula of illuminating beam is corresponding with the form of the exit end of light guide device, can avoid the influence of the form of the incident facula of illuminating beam, the shape and the corresponding emergent facula of size of emergent and exit end all the time. Furthermore, when the utility model provides a light guide device is used for transmitting polychrome illuminating beam, even if the various colour facula of the incident end that incides the light guide device do not overlap completely, also can output the even illuminating spot of colour mixture to can correct the problem of off colour.

The utility model provides a pair of lighting assembly and endoscope system all include above-mentioned leaded light device, consequently, can reach above-mentioned beneficial effect equally.

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 these drawings without creative efforts.

FIG. 1 is a schematic view of a prior art endoscope system;

fig. 2 (a) is a schematic diagram illustrating a position distribution of each color spot in an illumination beam emitted by a light source according to an embodiment of the present invention;

fig. 2 (b) is a schematic diagram illustrating the relative positions of the light spots of different colors in the illumination beam emitted by the light source and the incident end surface of the light guide device according to an embodiment of the present invention;

fig. 3 is a schematic layout view of a light guide device and a light source according to an embodiment of the present invention;

fig. 4 is a schematic layout view of a light guide device and a light source according to another embodiment of the present invention;

fig. 5 (a) is a schematic diagram of a conventional optical fiber bundle according to an embodiment of the present invention;

fig. 5 (b) is a schematic diagram of a hybrid fiber bundle according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a lighting assembly according to an embodiment of the present invention;

fig. 7 is a schematic view of an endoscope system according to an embodiment of the present invention.

Detailed Description

In order to make the technical solutions in the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall fall within the protection scope of the present invention.

Currently, in order to reduce the light loss and the use cost of the endoscope, a related solution of embedding the light source in the endoscope body is proposed, such as disposing the light source on the operation portion of the endoscope body. The light-emitting chips (for example, LED chips) with small size and small light-emitting area can be selected to provide illumination light beams of various wavelength bands (i.e., illumination light beams of various colors), and then the illumination light beams corresponding to the target light-emitting spectrum are modulated and formed by combining the illumination light beams. However, in the course of development, the inventors of the present application found that: when the multi-wavelength light source is applied, the problem of color cast of the illumination light spots emitted by the mirror body is easy to occur, and further the imaging effect is poor.

For this reason, it is mainly because: the multi-wavelength light source generally combines two or more colors of illumination light into a combined light beam through a predetermined number of dichroic filter plates, and then emits the combined light beam. However, it is difficult to substantially completely overlap the light spots of the illumination lights of the respective colors in the emitted combined light. For example, use and form white light through ruddiness, green glow and blue light combination as an example, as shown in fig. 2 (a), for the utility model discloses a position distribution sketch map of each colour facula in the illumination beam that the light source sent, there is the skew in the position between ruddiness facula, green glow facula and the blue light facula three, fails to overlap completely, and the part that only the three overlaps can mix colours and form the white light facula.

When the light source adopts a light emitting chip with a large light emitting area, the area of the emergent light spot is large, and correspondingly, the overlapping area of each color light spot is large, so that when the light source and the light guide device are coupled, as long as the light rays entering the light guide device are all the light rays corresponding to the overlapping area of each color light spot, the illumination light with uniform color mixture can be output from the light guide device.

However, when the light source employs a light emitting chip having a small light emitting area, the area of the emitted light spot is small, and accordingly, the overlapping area of the light spots of the respective colors is small, and since the area (aperture) of the end face of the incident end of the light guide means is generally constant, in this case, as shown in fig. 2 (b), the area of the end face of the incident end of the light guide means is generally larger than the overlapping area of the light spots of the respective colors, and further, the light spots of the respective colors incident to the incident end of the light guide means are not completely overlapped.

Further, since the incident light spot and the emergent light spot of the conventional light guide device are substantially the same, the light spots of the respective colors in the illumination light beam guided out by the conventional light guide device do not completely overlap, and therefore, the emitted illumination light beam forms white light only in the region where the light spots of the respective colors overlap (usually, the central region), and other undesired colors appear in the region where the light spots of the respective colors do not overlap (usually, the peripheral region), that is, color deviation (color cast) occurs, and the imaging effect is poor.

In view of the above, embodiments of the present invention provide a light guide device, and an illumination assembly and an endoscope system including the light guide device, so as to solve the color cast problem.

Specifically, the embodiment of the present invention provides a light guide device, except for being capable of transmitting an illuminating light beam emitted from a light source, the light guide device can be further used to change the transmission direction of at least part of light rays of the illuminating light beam, so that at least part of light rays of the illuminating light beam are redistributed at an exit end, and when an incident light spot of the illuminating light beam is smaller than the end face of the incident end of the light guide device, the shape of the exit light spot of the illuminating light beam (i.e., the illuminating light spot emitted from the exit end of the light guide device) corresponds to the shape of the exit end, so that the influence of the shape of the incident light spot of the illuminating light beam can be avoided, and the exit light spot corresponding to the shape (shape and size) of the exit end is always emitted.

Therefore, when the light guide device provided by the embodiment of the utility model is used for transmitting multicolor illumination light beams, because the form of each color facula that the light guide device emits is irrelevant with the form of each color incident facula that corresponds, corresponding with the form of exit end all the time, so, each color facula form that the light guide device emits is unanimous, is completely overlapped, and the colour of the mixed facula that forms from this is even, therefore, even if the each color facula of the incident end that incides the light guide device is not completely overlapped, also can output the even illumination facula of colour mixture, can correct the problem of off colour.

The light guide device, the illumination module, and the endoscope system according to the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Referring to fig. 3, fig. 3 is a schematic layout view of the light guide device and the light source provided in an embodiment, as shown in the figure, the light guide device 101 has an incident end 102 and an exit end 103, the incident end 102 is used for coupling with the light source 100 to receive the illumination light beam emitted from the light source 100, and the illumination light beam is emitted from the exit end 103 after being transmitted by the light guide device 101; the light guide device 101 is further configured to change a transmission direction of at least some light rays in the illumination light beam, so that the at least some light rays are redistributed at the exit end 103, and when an incident light spot of the illumination light beam is smaller than an end face of the incident end 103, a form of the exit light spot of the illumination light beam corresponds to a form of the exit end 103.

The change of the transmission direction of the light specifically means that the light deflects relative to the axial direction of the light guide device 101, so that the incident position and the emergent position of the light in the light guide device 101 are shifted in the radial direction.

The incident spot of the illumination light beam refers to a spot where the illumination light beam is incident on the incident end 102 of the light guide device 101 and enters the inside of the light guide device 101. The flare of the illumination light beam refers to a flare formed when the illumination light beam is emitted from the emission end 103 of the light guide device 101.

The shape of the emergent light spot of the illumination light beam corresponds to the shape of the emergent end 103, and at least the shape of the emergent light spot of the illumination light beam is the same as the shape of the end surface of the emergent end 103. Specifically, the shape of the emergent spot of the illumination light beam corresponding to the shape of the emergent end 103 may be the shape and size of the emergent spot of the illumination light beam, which are respectively the same as the shape and size of the end face of the emergent end 103. Alternatively, the shape of the emergent spot of the illumination beam corresponding to the shape of the emergent end 103 may be the same as the shape of the end face of the emergent end 103, but the emergent spot of the illumination beam is an enlarged spot or a reduced spot, depending on the spot shape defined by the emergent end 103.

The light guide device 101 is used for changing the transmission direction of at least part of the light rays in the illumination light beam, so that at least part of the light rays are redistributed at the emergent end 103, and based on the redistribution, the light quantity distribution of the illumination light spots emitted by the light guide device 101 can be controlled through the light guide device 101. For example, in practical applications, by performing corresponding optical design on the light guide device 101, when the incident light spot of the illumination light beam is smaller than the end face of the incident end of the light guide device 101, no matter where the incident light spot of the illumination light beam is at the input end 102 of the light guide device 101, the transmission direction of part of or all light rays of the illumination light beam can be changed, so that the illumination light spot emitted by the light guide device 101 meets the preset light quantity distribution requirement. Therefore, through the utility model discloses a light guide device both can improve the light beam's of outgoing color cast problem, also can promote the illumination homogeneity of the light beam of outgoing. In this embodiment, the requirement of the preset light amount distribution is not limited, for example, the light amount distribution is gaussian; or, the requirement of uniform distribution of light quantity in practical application is met.

Optionally, as an optional implementation, the light guide device 101 may include: a fiber optic bundle for transmitting the illumination beam; and the light mixing component is connected with the optical fiber bundle and is used for changing the transmission direction of at least part of light rays of the illumination light beams. In this embodiment, the structure of the light mixing component or the optical principle for changing the transmission direction of at least part of the light rays of the illumination light beam is not limited as long as the transmission direction of at least part of the light rays of the illumination light beam can be changed.

Optionally, the light mixing component may comprise a light homogenizing rod with a cavity inside for reflecting the illumination light beam multiple times. The illumination light beam is reflected for multiple times in the cavity of the dodging rod, so that the transmission direction of at least part of light rays of the illumination light beam is changed, a virtual light source image can be formed by each reflection, a two-dimensional virtual light source image matrix is formed by multiple reflections, and at least part of light rays of the illumination light beam are redistributed after passing through the dodging rod. Alternatively, the cavity of the light homogenizing rod may be polygonal, so that multiple reflections of the illumination beam can occur within the cavity.

Optionally, the light mixing component may comprise a birefringent light homogenizing rod for total reflection of the illumination light beam multiple times. The double refraction dodging rod comprises a first refraction layer and a second refraction layer, the refraction rates of the first refraction layer and the second refraction layer are different, the illumination light beam can be totally reflected when entering an interface of the first refraction layer and the second refraction layer, and the illumination light beam can be totally reflected for multiple times when passing through the double refraction dodging rod, so that at least part of light of the illumination light beam is redistributed.

Optionally, the light mixing member may comprise a transparent lens for scattering the illumination beam, so that at least part of the illumination beam is redistributed after passing through the transparent lens. Alternatively, the transparent lens may be an optical medium lens with at least one optical surface subjected to frosting treatment, but is not limited thereto, and the transparent lens may also be in other forms, which are within the protection scope of the present invention.

It should be noted that, the above-mentioned several embodiments of the light mixing component are only used to illustrate the way in which the light mixing component changes the transmission direction of at least part of the light rays of the illumination light beam, and are not used to limit the light mixing component in this application, and in other embodiments, the light mixing component may also adopt other structures or implement, based on other optical principles, a change in the transmission direction of at least part of the light rays of the illumination light beam so as to redistribute at least part of the light rays of the illumination light beam at the exit end, and the present invention is also within the protection scope of the present invention.

Alternatively, the light mixing member may be disposed on an optical path between the light source and the optical fiber bundle, so that the illumination light beam passes through the light mixing member before entering the optical fiber bundle. Alternatively, the light mixing member may be disposed on an outgoing light path of the optical fiber bundle. The illumination light beam is emitted from the optical fiber bundle and then passes through the light mixing member. Alternatively, a light mixing member may be provided on an optical path between the light source and the optical fiber bundle, and a light mixing member may also be provided on an outgoing optical path of the optical fiber bundle, so that the illumination light beam passes through the light mixing member before entering the optical fiber bundle and passes through the light mixing member after exiting from the optical fiber bundle. The light mixing member disposed on the light path between the light source and the optical fiber bundle may be the same as or different from the light mixing member disposed on the light outgoing path of the optical fiber bundle. Referring to fig. 4 exemplarily, fig. 4 is a schematic layout diagram of a light guide device and a light source according to still another embodiment, as shown in the figure, a light guide device 101 includes a fiber bundle 104 and a light mixing component 105, the light mixing component 105 is disposed between a light source 100 and the fiber bundle 104, and an illumination light beam emitted from the light source 100 passes through the light mixing component 105 and is incident on an end face of the fiber bundle 104 coupled with the light mixing component 105.

Further preferably, the optical fiber bundle is a hybrid optical fiber bundle, the hybrid optical fiber bundle includes a plurality of optical fibers, and an arrangement position of an exit end of at least some of the optical fibers in the plurality of optical fibers at the exit end of the hybrid optical fiber bundle is different from an arrangement position of an incident end of the optical fiber at the incident end of the hybrid optical fiber bundle. Then, the illumination light beam enters the optical fiber bundle from the incident end of the optical fiber bundle, and each part of light is transmitted along the optical fiber bundle, because the arrangement position of the exit end of at least part of the optical fibers of the optical fiber bundle at the exit end of the optical fiber bundle is different from the arrangement position of the incident end of the optical fiber at the incident end of the optical fiber bundle, the distribution of at least part of light of the illumination light beam exiting from the exit end of the optical fiber bundle is changed compared with that before the illumination light beam enters the optical fiber bundle, so that the influence of the shape of the incident light spot of the illumination light beam can be further avoided, and the exit light spot and the incident light spot of the light guide device 101 are different.

Optionally, as another optional implementation manner, the light guide device 101 includes a hybrid fiber bundle, where the hybrid fiber bundle includes a plurality of optical fibers, and an arrangement position of exit ends of at least some of the optical fibers in the plurality of optical fibers at the exit end of the hybrid fiber bundle is different from an arrangement position of incident ends of the optical fibers at the incident end of the hybrid fiber bundle. Then, the illumination light beam enters the optical fiber bundle from the incident end of the hybrid optical fiber bundle, and each part of light is transmitted along the optical fiber bundle, because the arrangement position of the exit end of at least part of the optical fibers of the hybrid optical fiber bundle at the exit end of the hybrid optical fiber bundle is different from the arrangement position of the incident end of the local optical fiber at the incident end of the hybrid optical fiber bundle, the distribution of at least part of light of the illumination light beam exiting from the exit end of the hybrid optical fiber bundle is changed compared with that before the illumination light beam enters the optical fiber bundle, so that at least part of light of the illumination light beam is redistributed at the exit end of the light guide device 101.

In this embodiment, the changing manner of the arrangement positions of the optical fibers at the exit end and the incident end of the hybrid fiber bundle is not limited, and the number of the optical fibers that are changed at the exit end and the incident end of the hybrid fiber bundle is not limited, and in practical applications, the setting can be performed according to the incident light spot condition before the illumination light beam enters the optical fiber bundle and the requirement for the illumination light spot output by the light guide device 101. For example, in the case of each color spot in the illumination beam emitted from the light source shown in fig. 2 (a), the red light spot, the green light spot, and the blue light spot do not completely overlap each other, and the region where the color spots overlap each other is the central region, and the color spots do not overlap each other in the peripheral region. Aiming at the light spot condition, the optical fibers at the periphery of the optical fiber bundle can be at least mixed and woven, and the arrangement position of the emergent end of the optical fibers is different from the arrangement position of the incident end of the optical fibers, so that after the illumination light beams are transmitted through the mixed and woven optical fiber bundle, the light rays in the peripheral area of the illumination light beams are at least redistributed, the illumination light spots with uniform mixed color can be output, and the color cast problem can be corrected.

As an example, referring to fig. 5 (a) and fig. 5 (b), fig. 5 (a) is a schematic diagram of a conventional optical fiber bundle provided in an embodiment, and fig. 5 (b) is a schematic diagram of a hybrid optical fiber bundle provided in an embodiment, as shown in fig. 5 (a), arrangement positions of two ends of each optical fiber of the optical fiber bundle are the same, and in the hybrid optical fiber bundle shown in fig. 5 (b), arrangement positions of an outgoing end and an incoming end of the optical fiber at the periphery of the optical fiber bundle are changed.

Preferably, in order to improve the illumination uniformity of the emergent light spots, the arrangement position of the emergent end of each optical fiber in the hybrid fiber bundle at the emergent end of the hybrid fiber bundle may be different from the arrangement position of the incident end of the optical fiber at the incident end of the hybrid fiber bundle. That is, the arrangement position of each fiber exit end of the hybrid fiber bundle is different from the arrangement position of each fiber entrance end of the hybrid fiber bundle, and the fiber bundle adopts a complete hybrid manner, so that all light rays of the illumination light beam are redistributed after being transmitted through the hybrid fiber bundle.

The present embodiment also provides a lighting assembly comprising a light source and a light guide device as described above.

In the illumination assembly of the embodiment, the applied light guide device changes the transmission direction of at least part of the light rays of the illumination light beam, so that at least part of the light rays of the illumination light beam are redistributed at the emergent end, when the incident light spot of the illumination light beam is smaller than the end face of the incident end of the light guide device, the form of the emergent light spot of the illumination light beam corresponds to the form of the emergent end of the light guide device, the influence of the form of the incident light spot of the illumination light beam can be avoided, and the emergent light spot corresponding to the shape and the size of the emergent end is always emergent. Further, even if the light spots of the respective colors emitted from the light sources are not completely overlapped, the light spots with uniform color mixture can be output, and the problem of color cast can be corrected.

Preferably, the light source is a multi-wavelength light source for emitting the illumination light beams of at least two colors to the light guide device, and the illumination light beams of at least two colors are combined into an emission light beam of the light source. Preferably, the light output amount of each of the at least two colors of illumination light beams is adjustable. By adjusting the light output quantity of each of the at least two colors of illumination light beams and combining the adjustment effect of the light guide device in the illumination assembly on the light distribution of the illumination light beams, the adjustment of optical parameters such as color temperature, color rendering index and color coordinates of the illumination light beams emitted by the illumination assembly can be realized. In practical applications, the light emitting amount of each color light beam can be adjusted by adjusting the driving current or driving voltage of the light emitting chip corresponding to each color illumination light beam. Wherein the incident spots of each color of illumination light beam incident on the light guide may not completely overlap.

In this embodiment, the structure of the light source is not limited, and the light source may emit a desired illumination beam. The light source may comprise at least two light emitting chips, and the outgoing light beams of the various light emitting chips are combined into an outgoing light beam of the light source. Referring to fig. 6, fig. 6 is a schematic structural diagram of an illumination assembly according to an embodiment, and as shown in the figure, the light source 100 includes a first light emitting chip 106, a second light emitting chip 107, a third light emitting chip 108, a first light combining element 109, and a second light combining element 110. The light emitted from the first light-emitting chip 106 and the light emitted from the second light-emitting chip 107 enter the first light-combining element 109, and the first light-combining element 109 is configured to combine and emit the light emitted from the first light-emitting chip 106 and the light emitted from the second light-emitting chip 107. The light emitted from the first light combining element 109 and the light emitted from the third light emitting chip 108 are incident on a second light combining element 110, and the second light combining element 110 is used for combining and emitting the light emitted from the first light combining element 109 and the light emitted from the third light emitting chip 108.

As shown in fig. 6, the light source may further include a first lens group 111 disposed on the light path of the first light emitting chip 106, for collimating the emergent light of the first light emitting chip 106. The light source module further comprises a second lens group 112 disposed on a light emitting path of the second light emitting chip 107, and configured to collimate emergent light of the second light emitting chip 107. The light source further comprises a third lens group 113 disposed on the light emitting path of the third light emitting chip 108, and configured to collimate the light emitted from the third light emitting chip 108. The optical lens assembly further includes a fourth lens group 114 disposed on the light-emitting path of the second light combining element 110, and is configured to converge the light emitted from the second light combining element 110.

It can be understood that the light source structure shown in fig. 6 is only an optional embodiment, and is not intended to limit the structure of the light source in the present invention, and the light source may adopt other structures in other embodiments of the present invention, all falling within the protection scope of the present invention.

The present embodiments also provide an endoscope system including: the light source is arranged in the mirror body, and the light guide device is arranged in the mirror body in a penetrating manner and extends to the far end of the mirror body.

In the illumination module applied to the endoscope system of the embodiment, the light guide device changes the transmission direction of at least part of the light rays of the illumination light beam, so that at least part of the light rays of the illumination light beam are redistributed at the emergent end, when the incident light spot of the illumination light beam is smaller than the end face of the incident end of the light guide device, the form of the emergent light spot of the illumination light beam corresponds to the form of the emergent end of the light guide device, the influence of the form of the incident light spot of the illumination light beam can be avoided, and the emergent light spot corresponding to the shape and the size of the emergent end can be always emitted. Further, even if the light spots of the respective colors emitted from the light sources are not completely overlapped, the light spots with uniform color mixture can be output, and the problem of color cast can be corrected.

The endoscope system of the embodiment arranges the light source on the endoscope body, so that the transmission distance of emergent light of the light source can be reduced, and the light loss can be reduced. Optionally, the light source may be disposed at an operation portion of the mirror body. In this embodiment, the specific form of the light source disposed on the mirror body is not limited. Referring to fig. 7 exemplarily, fig. 7 is a schematic diagram of an endoscope system according to an embodiment, and as shown in the figure, the endoscope system includes a light source 200, a light guide 201, and a scope body, the scope body includes an operation portion 202 and an insertion portion 203, and the light source 200 is disposed on the operation portion 202. One end of the light guide 201 is connected to the light source 200, and the light guide 201 extends along the lens body to the distal end of the insertion portion 203, and the outgoing light from the light source 200 propagates through the light guide 201 and is emitted from the distal end of the insertion portion 203.

The light guide device, the illumination assembly and the endoscope system provided by the present invention have been described in detail above. The principles and embodiments of the present invention have been explained herein using specific examples, and the above description of the embodiments is only used to help understand the method and its core idea of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims (14)

1. A light guide device is applied to a light source and used for guiding an illuminating light beam emitted by the light source, and is characterized in that the light guide device is provided with an incident end and an emergent end, the incident end is used for being coupled with the light source so as to receive the illuminating light beam, and the illuminating light beam is transmitted by the light guide device and then emitted from the emergent end;

the light guide device is further configured to change a transmission direction of at least some light rays in the illumination light beam, so that the at least some light rays are redistributed at the exit end, and when an incident light spot of the illumination light beam is smaller than an end face of the incident end, a form of the exit light spot of the illumination light beam corresponds to a form of the exit end.

2. A light guide device according to claim 1, wherein the light guide device comprises:

a fiber optic bundle for transmitting the illumination beam;

and the light mixing component is connected with the optical fiber bundle and is used for changing the transmission direction of at least part of light rays of the illumination light beams.

3. A light guide device according to claim 2, wherein the light mixing component comprises a light homogenizing rod with a cavity inside for reflecting the illumination light beam multiple times.

4. A light guide device according to claim 2, wherein the light mixing component comprises a birefringent light homogenizing rod for totally reflecting the illumination light beam multiple times.

5. A light guide device according to claim 2, wherein the light mixing member comprises a light transmissive lens for scattering the illumination light beam.

6. A light guide device according to any one of claims 2 to 5, wherein the light mixing member is disposed on an optical path between the light source and the optical fiber bundle, or/and the light mixing member is disposed on an outgoing optical path of the optical fiber bundle.

7. The light guide device according to claim 6, wherein the optical fiber bundle is a hybrid optical fiber bundle, the hybrid optical fiber bundle includes a plurality of optical fibers, and an arrangement position of an exit end of at least some of the optical fibers in the plurality of optical fibers at the exit end of the hybrid optical fiber bundle is different from an arrangement position of an incident end of the optical fiber at the incident end of the hybrid optical fiber bundle.

8. A light guide device according to claim 1, wherein the light guide device comprises a hybrid fiber bundle, the hybrid fiber bundle comprises a plurality of optical fibers, and the arrangement position of the exit ends of at least some of the optical fibers in the hybrid fiber bundle is different from the arrangement position of the incident ends of the optical fibers in the incident end of the hybrid fiber bundle.

9. A light guide device according to claim 8, wherein the at least some optical fibers are optical fibers located at the outer periphery of the hybrid fiber bundle.

10. A light guide device according to claim 8, wherein the exit end of each optical fiber in the hybrid fiber bundle is arranged at a different position from the position at which the incident end of the optical fiber is arranged at the incident end of the hybrid fiber bundle.

11. A lighting assembly comprising a light source and a light guide device as claimed in any one of claims 1 to 10.

12. The illumination assembly of claim 11 wherein the light source is a multi-wavelength light source for emitting at least two colored illumination beams toward the light guide, the incident spots of each colored illumination beam incident on the light guide not overlapping completely.

13. An endoscopic system, comprising: a mirror body and an illumination assembly as claimed in claim 11 or 12, wherein the light source is arranged in the mirror body and the light guide means is arranged through the mirror body and extends to the distal end of the mirror body.

14. The endoscopic system of claim 13, wherein the light source is disposed at an operative portion of the scope.

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