CN116350159A

CN116350159A - Light diffusion lighting device and endoscope

Info

Publication number: CN116350159A
Application number: CN202310345019.9A
Authority: CN
Inventors: 奚杰峰; 张华堂; 李艳; 吴海波; 杨华
Original assignee: Micro Tech Nanjing Co Ltd
Current assignee: Micro Tech Nanjing Co Ltd
Priority date: 2023-04-03
Filing date: 2023-04-03
Publication date: 2023-06-30

Abstract

The invention provides a light diffusion lighting device and an endoscope, which relate to the technical field of medical equipment, wherein the light diffusion lighting device comprises: the back of the diffusion element is provided with a connecting area, and the light emitting end of the light guide body extends into the connecting area. On one hand, the assembly method does not need to consider the hydrophilia of the diffusion element and the light guide body, so that the requirement on raw materials is reduced; on the other hand, because a part of the light guide is already limited in the diffusion element, the device can be prevented from being secondarily reinforced and sealed, and the combination cost is reduced. Meanwhile, as the light guide body stretches into one part of the diffusion element, light emitted from the light guide body is repeatedly scattered in the diffusion element, not only can one part of the diffusion element at the front side of the light guide body emit light, but also one part of the diffusion element at the peripheral outer side of the light guide body can emit light, so that the illumination range and uniformity are greatly improved.

Description

Light diffusion lighting device and endoscope

Technical Field

The invention relates to the technical field of medical equipment, in particular to a light diffusion lighting device and an endoscope.

Background

In the medical field, an endoscope system is used for observing the inside of a subject. An endoscope is generally inserted into a subject such as a patient, and a flexible insertion portion having an elongated shape is inserted from a distal end of the insertion portion to illuminate the inside of the subject with illumination light. The endoscope is connected to a light source device for supplying illumination light.

The existing lighting device, such as CN107250661B, comprises a light guiding component and a light conversion component, where the light guiding component and the end of the light conversion component are connected together, and are an assembly, and when assembling, there is a requirement for hydrophilicity of materials, and the front end component (i.e. the light conversion component) of the lighting device is required to be lower than the hydrophilicity of the light guiding component, so that the selection of the light guiding component and the light conversion component is limited; in addition, after the assembly is completed, the connection position of the two components is required to be reinforced and sealed for the second time, and the processing is troublesome; in addition, in the above-mentioned illumination device, only the hemispherical surface of the light conversion member emits light, and when the NA value of the light guide body in the prior art is less than or equal to 0.8, the FOV of the light guide body with the view field illumination angle cannot meet the required angle of the endoscope image during transmitting the light emitted by the non-laser light source, and cannot meet enough illumination and illumination uniformity, so that the image quality is affected.

Disclosure of Invention

The invention aims to provide a light diffusion lighting device and an endoscope, so as to solve the technical problems that the existing lighting device has high hydrophilic requirement on raw materials, needs secondary reinforcement after assembly, and has small lighting angle and uneven illumination.

In a first aspect, an embodiment of the present invention provides a light diffusion lighting device, including: the back of the diffusion element is provided with a connecting area, and the light emitting end of the light guide extends to the inside of the diffusion element through the connecting area.

Further, the number of the light guide bodies is at least two.

Further, the diffusion element is provided with a mounting hole penetrating through the back surface and the front surface, and the mounting hole is used for mounting the image pickup mechanism; and the recess is located circumferentially outward of the mounting hole.

Further, the diffusion element comprises an integrally formed substrate and light diffusion particles dispersed inside the substrate.

Further, the diffusion element includes a substrate, and light diffusion particles attached to the substrate by an adhesive.

Further, the light diffusion particles surround the light guide body in a 4 pi solid angle;

alternatively, the light diffusing particles surround the light guide at a 4 pi-like solid angle or substantially a 4 pi solid angle.

Further, the light diffusion particles include at least one of silicone diffusion particles, PMMA crosslinked microsphere diffusion particles, PS crosslinked microsphere diffusion particles, inorganic silica particles, and titanium dioxide particles.

Further, the front surface of the diffusion element is a plane, an oblique cambered surface, an arc surface or a chamfer plane.

In a second aspect, the present invention provides an endoscope comprising the above light diffusing illumination device.

Further, the endoscope further comprises a light source arranged at the light inlet end of the light guide body.

The light diffusion lighting device provided by the embodiment of the invention comprises a diffusion element and a light guide body, wherein the back surface of the diffusion element is provided with a connecting area, and the light emitting end of the light guide body extends into the diffusion element through the connecting area. The device provided by the invention has the main innovation points that the back surface of the diffusion element is provided with the connecting area, the connecting area forms a space for assembling the light guide body, the light guide body can be extended into the diffusion element to finish the fixed connection between the diffusion element and the light guide body, and on one hand, the assembling method does not need to consider the hydrophilia of the diffusion element and the light guide body, so that the requirement on raw materials is reduced; on the other hand, because a part of the light guide is already limited in the diffusion element, the device can be prevented from being secondarily reinforced and sealed, and the combination cost is reduced. Meanwhile, as the light guide body stretches into one part of the diffusion element, light emitted from the light guide body is repeatedly scattered in the diffusion element for multiple times, not only can one part of the diffusion element at the front side of the light guide body emit light, but also one part of the diffusion element at the peripheral outer side of the light guide body can emit light, so that the illumination range and illumination uniformity are greatly improved.

The endoscope provided by the invention comprises the light diffusion lighting device. Because the endoscope provided by the embodiment of the invention refers to the light diffusion lighting device, the endoscope provided by the embodiment of the invention also has the advantage of the light diffusion lighting device.

Drawings

FIG. 1 is a schematic view of a light diffusing lighting device according to an embodiment of the present invention;

fig. 2 is a schematic view of a front surface of a diffusing element of a light diffusing lighting device according to an embodiment of the present invention;

fig. 3 is a schematic view of a front surface of a diffusing element of a light diffusing lighting device according to an embodiment of the present invention being an oblique arc surface;

FIG. 4 is a schematic view of a front surface of a diffusing element of a light diffusing lighting device according to an embodiment of the present invention;

FIG. 5 is a schematic view of a light diffusing lighting device according to an embodiment of the present invention, wherein the front and back sides of the diffusing element are chamfered planes;

FIG. 6 is a schematic view illustrating non-uniform extending directions of connection regions of diffusion elements of a light diffusion lighting device according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a light diffusing lighting device with a triangular cross section of a diffusing element according to an embodiment of the present invention;

FIG. 8 is a cross-sectional view taken along the direction A-A in FIG. 7;

fig. 9 is a graph showing the illumination effect when the mass ratio of the middle diffusion particles to the molding particles in the diffusion element of the light diffusion lighting device provided by the embodiment of the invention is 0%, 10% and 25%, respectively;

fig. 10 is a schematic view of an endoscope provided by an embodiment of the present invention.

Icon: a 100-diffusion element; 110-a substrate; 120-light diffusing particles; 130-a connection region;

200-a light guide;

300-a camera mechanism; 400-an imager; 500-handle; 600-light source; 700-catheter assembly; 800-cable.

Detailed Description

The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be noted that, if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are used, the indicated azimuth or positional relationship is based on the azimuth or positional relationship shown in the drawings, only for convenience of description and simplification of the description, and does not indicate or imply that the apparatus or element to be referred must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like, as used herein, are used for descriptive purposes only and are not to be construed as indicating or implying any relative importance.

In addition, in the description of embodiments of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1, a light diffusion lighting device provided in an embodiment of the present invention includes: a diffusing element 100 and a light guide 200.

The diffusion element 100 is manufactured by an integral molding technology, for example, a molding or glue injection mode.

The diffusing element 100 includes a substrate 110 and light diffusing particles 120 dispersed in the substrate 110, wherein the material of the substrate 110 may be a transparent plastic such as PC, PMMA, PS or a UV glue.

The light diffusion particles 120 may include at least one of silicone diffusion particles, PMMA crosslinked microsphere diffusion particles, PS crosslinked microsphere diffusion particles, inorganic silica particles and titania particles, that is, the kind of the light diffusion particles 120 dispersed in the substrate 110 may be single or plural.

Specifically, the diffusing element 100 may be formed by integrally molding UV glue and the light diffusing particles 120, or may be formed by integrally molding the light diffusing particles 120 and transparent plastic.

Further, the light diffusion particles 120 may surround the light guide body 200 with a solid angle of 4pi, so that the non-laser light emitted from the light guide body 200 is repeatedly scattered by the diffusing agent in the diffusion element 100 and then emitted, thereby expanding the illumination range, and the repeated scattering and light mixing make the illumination more uniform. The term "substantially 4 pi solid angle" may be referred to herein as "substantially 4 pi solid angle", that is, the light-diffusing particles 120 are substantially 4 pi solid angle, but a slight angular deviation is unavoidable due to the limitation of the manufacturing process. The integrally molded diffusion element 100 and the light guide body 200 are in a three-dimensional surrounding shape, and the distribution positions of the diffusion elements do not influence the diffusion effect and uniformity of the diffusion elements, and the limitation of equidistant distribution is not needed, so that the distribution requirement on the light guide body 200 is low.

In another embodiment, the light diffusion particles 120 on the substrate 110 may be bonded by gluing, that is, the substrate 110 is formed first, and after the substrate 110 is cured, the light diffusion particles 120 are adhered to the surface of the substrate 110.

As shown in fig. 9, the proportion of the light diffusion particles 120 affects the illumination range and uniformity, and the first graph in fig. 9 is an illumination effect graph without the light diffusion particles 120, and the second and third graphs are illumination effect graphs with the light diffusion particles 120, which have a larger illumination range and a more uniform illumination than the second two graphs.

The connection region 130 may be a concave hole or a groove, the light emitting end of the light guide body 200 extends into the connection region 130, the light emitting end faces the bottom surface of the connection region 130, and the light emitting direction is along the direction of the back to the front of the diffusion element 100. After entering the diffusion element 100, the light is scattered by the light diffusion particles 120 in the diffusion element 100 for multiple times, so that the light is emitted from each angle and each position, and the illumination range and uniformity are improved.

When the diffusion element 100 is assembled with the light guide 200, the diffusion element 100 may be prepared, then the light guide 200 is inserted into the diffusion element 100, then the adhesive is injected into the connection region 130, and after the adhesive is cured, the diffusion element 100 is tightly connected with the light guide 200.

Alternatively, during the curing process of the substrate 110, the diffusion element 100 is inserted, and after the substrate 110 is completely cured, the substrate 110 holds the light guide 200 tightly, and by adopting this preparation method, the substrate 110, the light diffusion particles 120 and the light guide 200 can be processed into an integral structure.

In summary, when the diffusion element 100 is assembled with the light guide 200, the light guide 200 is not required to be bent, and the type of the light guide 200 is not limited, and the light guide 200 may be made of a brittle glass fiber or a plastic fiber. The integrally molded diffusion member simplifies the assembly structure without distorting the assembly of the light guide 200, and there is no particular limitation on the material of the light guide 200.

The main innovation point of the device is that in the device provided by the invention, the back surface of the diffusion element 100 is provided with the connecting area 130 which is concave towards the front surface, the connecting area 130 forms a space for assembling the light guide body 200, the light guide body 200 can be extended into the diffusion element 100 to finish the fixed connection of the diffusion element 100 and the light guide body 200, on one hand, the assembling method does not need to consider the hydrophilia of the diffusion element 100 and the light guide body 200, and the requirement on raw materials is reduced; on the other hand, since a part of the light guide 200 is already confined within the diffusion member 100, secondary reinforcement sealing of the device can be avoided, reducing the assembly cost. Meanwhile, since the light guide 200 extends into a portion of the diffusion element 100, the light emitted from the light guide 200 is repeatedly scattered in the diffusion element 100 a plurality of times, not only a portion of the diffusion element 100 on the front side of the light guide 200 can emit light, but also a portion of the diffusion element 100 on the outer side of the light guide 200 in the circumferential direction can emit light, thereby greatly improving the illumination range and uniformity.

The number of the light guides 200 in the device may be one or at least two according to the illumination brightness requirement. When the light guide 200 is more than one, the light guides 200 may be located in the same connection region 130 or in multiple connection regions 130.

As shown in fig. 5, the diffusing element 100 has mounting holes penetrating the back and front surfaces, and the mounting holes are used for mounting the image pickup mechanism 300; and the connection region 130 is located at the circumferential outer side of the mounting hole. The illumination outside the camera is even, helps the operator to observe the internal condition.

As shown in fig. 2-4, the front surface of the diffusing element 100 may be a planar surface, a beveled curved surface, a rounded surface, or a chamfered planar surface.

As shown in fig. 5, both the front and back sides of the diffusing element 100 may have chamfers so that light is uniformly scattered out of the chamfer locations in a curved surface.

The cross-section of the connection region 130 at the back of the diffusion element 100 may or may not be uniform in shape in the front-rear direction, and for example, as shown in fig. 6, the connection region 130 is divided into two parts, and the aperture of a part near the back is similar to that of the light guide 200, and the light guide 200 penetrates from this part, and the part near the front is spherical and has a larger diameter than the other part.

As shown in fig. 7 and 8, the cross-section of the outer wall of the diffusing element 100 may be triangular in shape. Thereby the umbrella cover of the circumferential side wall can emit light.

The thickness of the portion of the diffusion member 100 in contact with the end face of the light guide 200 may be between 0.1mm and 5 mm.

As shown in fig. 10, the endoscope further includes an image capturing mechanism 300, an imager 400, a handle 500, a light source 600, a catheter assembly 700, and a cable 800, wherein the light source 600 may be disposed within the handle 500, the light diffusing illumination may be mounted at the distal end of the catheter assembly 700, and the handle 500 is mounted at the proximal end of the catheter assembly 700.

The camera mechanism 300 is mounted on the diffusing element 100, the camera mechanism 300 being connected to the imager 400 outside the handle 500 by a cable 800, the cable 800 passing sequentially through the catheter assembly 700 and the handle 500.

The light emitted from the light source 600 irradiates light to a target position through the light guide 200 and the light diffusion member, the image pickup mechanism 300 of the endoscope head end converts the light signal received scattered from the target position into an electric signal, and transmits the electric signal to the image processing apparatus of the imager 400 through the transmission cable 800, and then the image signal is converted into an image signal by the imager 400 and output.

The light diffusion lighting device provided by the invention can realize sufficient lighting requirements, so that the light source 600 can be a non-laser light source 600, the non-laser light source 600 guides light beams into the diffusion element 100 through the light guide body 200, and the light beams are scattered and mixed by the diffusion element 100 and then emitted, so that the requirement on the light source 600 is low.

The endoscope can be a disposable pancreatic gall imaging catheter, a disposable bronchial imaging catheter, a disposable urinary imaging catheter and other disposable electronic endoscopes or a reusable endoscope.

Finally, it should be noted that: the above examples are only specific embodiments of the present invention for illustrating the technical solution of the present invention, but not for limiting the scope of the present invention, and although the present invention has been described in detail with reference to the foregoing examples, it will be understood by those skilled in the art that the present invention is not limited thereto: any person skilled in the art may modify or easily conceive of the technical solution described in the foregoing embodiments, or perform equivalent substitution of some of the technical features, while remaining within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.

Claims

1. A light diffusing lighting device, comprising: the light emitting device comprises a diffusion element (100) and a light guide body (200), wherein the back surface of the diffusion element (100) is provided with a connecting area (130), and the light emitting end of the light guide body (200) extends into the diffusion element (100) through the connecting area (130).

2. A light diffusing lighting device according to claim 1, characterized in that the number of light guides (200) is at least two.

3. The light diffusion lighting device according to claim 2, wherein the diffusion element (100) has mounting holes penetrating the back and front surfaces for mounting an image pickup mechanism (300); and the connection region (130) is located circumferentially outward of the mounting hole.

4. A light diffusing lighting device according to claim 3, characterized in that said diffusing element (100) comprises an integrally formed substrate (110) and light diffusing particles (120) dispersed inside the substrate (110).

5. A light diffusing lighting device according to claim 3, characterized in that the diffusing element (100) comprises a substrate (110), and light diffusing particles (120) attached to the substrate (110) by means of an adhesive.

6. The light diffusing lighting device according to claim 4, characterized in that the light diffusing particles (120) surround the light guide body (200) at a solid angle of 4pi;

alternatively, the light diffusing particles (120) surround the light guide (200) at a 4 pi-like solid angle or substantially at a 4 pi solid angle.

7. The light diffusing lighting device of claim 4, wherein said light diffusing particles (120) comprise at least one of silicone diffusing particles, PMMA cross-linked microsphere diffusing particles, PS cross-linked microsphere diffusing particles, inorganic silica particles, and titanium dioxide particles.

8. A light diffusing lighting device according to claim 1, characterized in that the front surface of the diffusing element (100) is a plane, a beveled arc, a rounded arc or a chamfered plane.

9. An endoscope comprising the light diffusing illumination device according to any one of claims 1 to 8.

10. The endoscope of claim 9, further comprising a light source (600) disposed at the light inlet end of the light guide (200).