CN212326566U

CN212326566U - Laser endoscope

Info

Publication number: CN212326566U
Application number: CN202020498984.1U
Authority: CN
Inventors: 梁姗姗; 康佳静; 李新宇; 张军
Original assignee: Sun Yat Sen University
Current assignee: Sun Yat Sen University
Priority date: 2020-04-07
Filing date: 2020-04-07
Publication date: 2021-01-12
Anticipated expiration: 2030-04-07

Abstract

The utility model relates to the technical field of endoscopes, and provides a laser endoscope which comprises a laser, a first light transmission channel, a second light transmission channel and a dichroic mirror; the first optical transmission channel has an inlet and an outlet; the dichroic mirror is arranged at the outer side of the inlet; a light beam emitted by the laser penetrates through the dichroic mirror, enters the first light transmission channel from the inlet and exits from the outlet; the external visible light enters the first light transmission channel from the outlet, then exits from the inlet to the dichroic mirror and is reflected to the second light transmission channel. Laser beams emitted by the laser pass through the dichroic mirror and then enter the first optical transmission channel, and the laser beams in the first optical transmission channel are emitted from the outlet to a target object for laser burning; visible light scattered on the target object (the visible light scattered on the target object can be external auxiliary illumination) enters the first light transmission channel from the outlet, then exits from the inlet to the dichroic mirror and is reflected to the second light transmission channel for being acquired by a user.

Description

Laser endoscope

Technical Field

The utility model belongs to the laser endoscope field, more specifically say, relate to a laser endoscope.

Background

In modern surgery, an endoscope is often used to observe a target object and then perform laser treatment. However, the burning state is not easy to be observed in time during the burning process of the laser.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a laser endoscope to the laser that exists among the solution prior art is difficult to observe the technical problem of firing state at the firing in-process.

In order to achieve the above object, the utility model adopts the following technical scheme: a laser endoscope is provided that includes a laser, a first light transmission channel, a second light transmission channel, and a dichroic mirror; the first optical transmission channel has an inlet and an outlet; the dichroic mirror is arranged outside the inlet; a light beam emitted by the laser passes through the dichroic mirror, enters the first light transmission channel from the inlet and exits from the outlet; the external visible light enters the first light transmission channel from the outlet, then exits from the inlet to the dichroic mirror and is reflected to the second light transmission channel.

Further, the first optical transmission channel is in a shape of a straight conduit.

Further, a photoelectric detector is arranged in the second optical transmission channel.

Furthermore, an ocular lens is arranged between the photoelectric detector and the dichroic mirror, and an objective lens is arranged in the outlet.

Further, the laser has a first optical fiber disposed in parallel with the first optical delivery channel and extending to the exit.

Further, a first focusing mechanism is arranged in the emergent direction of the first optical fiber.

Further, a second focusing mechanism is provided on a laser beam path between the laser and the dichroic mirror.

Further, an illumination assembly is arranged in the first light transmission channel.

Further, the illumination assembly includes a second optical fiber routed along the first light delivery channel and extending to the exit port, a light source, and a coupler for coupling light from the light source into the second optical fiber.

Further, the lighting assembly comprises an LED lamp arranged at the outlet and a power supply connected with the LED lamp.

The utility model provides a laser endoscope's beneficial effect lies in: compared with the prior art, the laser endoscope provided by the utility model has the advantages that the laser beam emitted by the laser device passes through the dichroic mirror and then enters the first optical transmission channel, and the laser beam in the first optical transmission channel is emitted from the outlet to the target object for laser firing; if a user needs to observe a target object, visible light scattered on the target object (the visible light scattered on the target object can be external auxiliary lighting) enters the first light transmission channel from the outlet, then exits from the inlet to the dichroic mirror and is reflected into the second light transmission channel for the user to obtain; namely, the laser treatment and the observation of the treatment are conveniently carried out simultaneously.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a schematic front view of a laser endoscope according to an embodiment of the present invention;

fig. 2 is a schematic front view of a first optical transmission channel according to an embodiment of the present invention;

fig. 3 is a right side schematic view of a first optical transmission channel according to an embodiment of the present invention;

fig. 4 is a first schematic diagram of a lens in a first optical transmission channel according to an embodiment of the present invention;

fig. 5 is a second schematic diagram of a lens in a first optical transmission channel according to an embodiment of the present invention;

fig. 6 is a third schematic view of a lens in the first optical transmission channel according to an embodiment of the present invention;

fig. 7 is a first schematic diagram of an objective lens provided in an embodiment of the present invention;

fig. 8 is a second schematic diagram of an objective lens provided in an embodiment of the present invention;

fig. 9 is a third schematic view of an objective lens provided in an embodiment of the present invention;

fig. 10 is a fourth schematic view of the objective lens according to the embodiment of the present invention.

Wherein, in the figures, the respective reference numerals:

1-a laser; 21-a first optical transmission channel; 211-inlet; 212-an outlet; 22-a second optical transmission channel; a 3-dichroic mirror; 41-a photodetector; 42-an eyepiece; 43-objective lens; 44-a second focus mechanism; 45-a third focus mechanism; 5-a lighting assembly; 51-a second optical fiber; 52-a light source; 53-coupler.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1 to 3 together, a laser endoscope according to the present invention will now be described. The laser endoscope comprises a laser 1, a first light transmission channel 21, a second light transmission channel 22, and a dichroic mirror 3 (the dichroic mirror 3 allows light waves of one frequency band to pass through and reflects light of another frequency band); the first optical transmission channel 21 has an inlet 211 and an outlet 212; the dichroic mirror 3 is disposed outside the inlet 211; the light beam emitted by the laser 1 passes through the dichroic mirror 3, enters the first light transmission channel 21 from the inlet 211, and exits from the outlet 212; the external visible light enters the first light transmission channel 21 from the outlet 212, then exits from the inlet 211 to the dichroic mirror 3, and is reflected into the second light transmission channel 22.

Thus, the laser beam emitted by the laser 1 passes through the dichroic mirror 3 and enters the first optical transmission channel 21, and the laser beam in the first optical transmission channel 21 is emitted from the outlet 212 to the target object for laser burning; if a user needs to observe a target object, visible light scattered on the target object (the visible light scattered on the target object can be external auxiliary lighting) enters the first light transmission channel 21 from the outlet 212, then exits from the inlet 211 to the dichroic mirror 3 and is reflected into the second light transmission channel 22 for the user to obtain (the user observes through scattered light on the target object in the second light transmission channel 22); namely, the laser treatment and the observation of the treatment are conveniently carried out simultaneously.

The laser 1 and the external illumination light have different wave bands, the light beam generated by the laser 1 passes through the dichroic mirror 3, and the external illumination light can be reflected by the dichroic mirror 3.

Optionally, in an embodiment, the laser 1 may be any one of a semiconductor laser, Nd: YAG, and CO2 laser, and the common wavelength may be any one of 980nm, 1470nm, and 10.6 um. Specifically, in one embodiment, the laser 1 produces infrared light.

Optionally, in one embodiment, the first light transmission channel 21 is tubular. Specifically, in one embodiment, the tubular body is metal.

Optionally, in one embodiment, the second light transmission channel 22 is tubular. Specifically, in one embodiment, the tubular body is metal.

Alternatively, in one embodiment, the first optical transmission channel 21 and the second optical transmission channel 22 are perpendicular to each other, so that the light beams in the two channels do not easily interfere with each other.

Optionally, in one embodiment, the second light transmission channel 22 is at an angle of 45 ° to the reflective surface on the dichroic mirror 3. Therefore, the dichroic mirror 3 is convenient to debug and convenient to install.

Alternatively, in one embodiment, the light of the central area on the reflective surface of the dichroic mirror 3 is reflected into the second light transmission channel 22. In this way, the light spots of the visible light in the first light transmission channel 21, which are emitted from the inlet 211 onto the dichroic mirror 3 and then reflected into the second light transmission channel 22, are more uniform, and the situation of a notch is not easy to occur.

Optionally, in one embodiment, the first light transmission channel 21 is circular in cross-section. Thus, production is easy, and the light beam propagation along the first light transmission channel 21 is not easily hindered. And the first light transmission channel 21 having a circular cross section is not easily scratched when it is in contact with a human body.

Further, referring to fig. 1 to 3 together, as an embodiment of the laser endoscope provided by the present invention, the first light transmission channel 21 is in a shape of a straight conduit. Thus, the light beam is not easily obstructed and lost in the tubular transport.

Further, referring to fig. 1 to 3, as an embodiment of the laser endoscope provided by the present invention, a photodetector 41 is disposed in the second light transmission channel 22. In this manner, the photodetector 41 can acquire the avatar and obtain digital pictures/video. Alternatively, in one embodiment, the photodetector 41 may be a CCD (Charge coupled Device, Chinese full name: Charge coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor).

Further, referring to fig. 1 to 3, as an embodiment of the laser endoscope provided by the present invention, an eyepiece 42 is disposed between the photodetector 41 and the dichroic mirror 3, and an objective 43 is disposed in the outlet 212. In this manner, the eyepiece lens 42 and the objective lens 43 cooperate to adjust the focal length to obtain a sharp target image.

Further, referring to fig. 1 to 3, as an embodiment of the laser endoscope provided by the present invention, the laser 1 has a first optical fiber disposed in parallel with the first light transmission channel 21 and extending to the outlet 212. In this way, the light beam generated by the laser 1 can be directly transmitted into the outlet 212 through the first optical fiber and then emitted from the outlet 212, so that the loss of laser beam propagation is reduced.

Further, referring to fig. 1 to 3, as an embodiment of the laser endoscope provided by the present invention, a first focusing mechanism is disposed in the emitting direction of the first optical fiber. In this way, the laser beam emitted from the first optical fiber can be adjusted in focus position of the laser spot size by the first focusing mechanism.

Specifically, in one embodiment, the first focus mechanism is a einzel lens and a motor that drives the einzel lens to move along the laser beam path. Specifically, in one embodiment, the einzel lens is a convex lens.

Alternatively, in one embodiment, a third focusing mechanism 45 is provided on the laser beam path between the outside of the inlet 211 and the dichroic mirror 3. Thus, the laser beam firstly passes through the third focusing mechanism 45 and then enters the inlet 211, so that the laser spot entering the inlet 211 can be conveniently adjusted. Specifically, in one embodiment, the third focus mechanism 45 is a einzel lens and a motor that drives the einzel lens to move along the laser beam path. Specifically, in one embodiment, the einzel lens is a convex lens.

Further, referring to fig. 1 to 3, as an embodiment of the laser endoscope provided by the present invention, a second focusing mechanism 44 is disposed on a laser beam path between the laser 1 and the dichroic mirror 3. In this way, the size of the laser spot can be adjusted when the laser beam emitted from the laser 1 passes through the second focusing mechanism 44, and the shape of the laser beam is effectively controlled when the adjusted laser beam passes through the dichroic mirror 3. Specifically, in one embodiment, the second focus mechanism 44 is a einzel lens and a motor that drives the einzel lens along the laser beam path. Specifically, in one embodiment, the einzel lens is a convex lens.

Further, referring to fig. 1 to 3, as an embodiment of the laser endoscope provided by the present invention, an illumination assembly 5 is disposed in the first light transmission channel 21. In this way, the illumination assembly 5 is capable of illuminating the target object. Specifically, in one embodiment, the illumination uses visible light.

Further, referring to fig. 1 to 3 together, as an embodiment of the laser endoscope provided by the present invention, the illumination assembly 5 includes a second optical fiber 51 disposed along the first light transmission channel 21 and extending to the outlet 212, a light source 52, and a coupler 53 for coupling light of the light source 52 into the second optical fiber 51. In this manner, light from the light source 52 enters the second optical fiber 51 through the coupler 53 and is transmitted to the outlet 212 for illumination.

Optionally, in an embodiment, the light source 52 is any one of a halogen lamp, a xenon lamp, and a light emitting diode.

Optionally, in an embodiment, the number of the second optical fibers 51 is multiple, and the multiple second optical fibers 51 are respectively arranged along the circumferential direction of the first optical transmission channel 21. In this manner, the plurality of second optical fibers 51 wound in the circumferential direction of the first light delivery path 21 output more uniform light, facilitating irradiation of the target object.

Further, referring to fig. 1 to 3 together, as an embodiment of the laser endoscope provided by the present invention, the illumination assembly 5 includes an LED lamp disposed at the exit 212 and a power supply connected to the LED lamp. Therefore, the LED lamp can provide illumination when the power supply is switched on, and is very convenient.

Referring to fig. 4, in one embodiment, a plurality of field lenses are disposed in the first light transmission channel 21. Referring to fig. 5, in one embodiment, a plurality of Hopkins rod lenses are disposed in the first light transmission channel 21. Referring to fig. 6, in one embodiment, a single GRIN lens is disposed within the first optical transmission channel 21. Specifically, in one embodiment, the field lens, the Hopkins rod lens, and the GRIN lens gradually increase in luminous flux.

Referring to fig. 7, in one embodiment, a single GRIN lens is used for the objective lens 43. Referring to fig. 8, in one embodiment, the objective lens 43 employs three optical elements, which are a parallel flat plate, a plano-concave lens and a plano-convex lens in sequence (from left to right, and right towards the target object to be detected). Referring to fig. 9, in one embodiment, the objective lens 43 adopts three optical elements, which are a plano-concave lens, a plano-convex lens and a plano-convex lens in sequence (from left to right, and towards the target object to be detected). Referring to fig. 10, in one embodiment, the objective lens 43 adopts five optical elements, which are a plano-concave lens, a plano-convex lens, a parallel plate, a double cemented lens (a double cemented structure to suppress curvature of field, spherical aberration and chromatic aberration), and a parallel plate in sequence (from left to right, and towards the target object to be detected). Specifically, in one embodiment, the aberrations in the four objective lenses 43 are gradually reduced.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. Laser endoscope, its characterized in that: the device comprises a laser, a first light transmission channel, a second light transmission channel and a dichroic mirror; the first optical transmission channel has an inlet and an outlet; the dichroic mirror is arranged outside the inlet; a light beam emitted by the laser passes through the dichroic mirror, enters the first light transmission channel from the inlet and exits from the outlet; the external visible light enters the first light transmission channel from the outlet, then exits from the inlet to the dichroic mirror and is reflected to the second light transmission channel.

2. The laser endoscope of claim 1, wherein: the first optical transmission channel is in a shape of a straight conduit.

3. The laser endoscope of claim 1, wherein: and a photoelectric detector is arranged in the second optical transmission channel.

4. The laser endoscope of claim 3 wherein: an ocular lens is arranged between the photoelectric detector and the dichroic mirror, and an objective lens is arranged in the outlet.

5. The laser endoscope of claim 1, wherein: the laser has a first optical fiber disposed in parallel with the first optical delivery channel and extending to the exit port.

6. The laser endoscope of claim 5 wherein: and a first focusing mechanism is arranged in the emergent direction of the first optical fiber.

7. The laser endoscope of claim 1, wherein: and a second focusing mechanism is arranged on a laser beam path between the laser and the dichroic mirror.

8. The laser endoscope of any one of claims 1 to 7, wherein: and an illumination assembly is arranged in the first light transmission channel.

9. The laser endoscope of claim 8 wherein: the illumination assembly includes a second optical fiber routed along the first light delivery channel and extending to the exit port, a light source, and a coupler for coupling light from the light source into the second optical fiber.

10. The laser endoscope of claim 8 wherein: the lighting assembly comprises an LED lamp arranged at an outlet and a power supply connected with the LED lamp.