CN110974137A

CN110974137A - Oblique-emission LED dodging lighting system for endoscope

Info

Publication number: CN110974137A
Application number: CN201911316627.7A
Authority: CN
Inventors: 王泰升; 张红鑫; 史成勇; 高群
Original assignee: Changchun Institute of Optics Fine Mechanics and Physics of CAS
Current assignee: Changchun Institute of Optics Fine Mechanics and Physics of CAS
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2020-04-10

Abstract

An oblique-emission LED dodging illumination system for an endoscope belongs to the technical field of medical auxiliary instruments and aims to solve the problems that an optical fiber illumination system in the prior art is high in installation difficulty and poor in direction consistency and illumination uniformity. The invention discloses an oblique-emission LED dodging lighting system for an endoscope, which comprises: a light source positioning member arranged at the front end of the endoscope; the LED light source module is fixed on the light source positioning piece, and the light emitting direction of the LED light source module is consistent with the direction of the visual axis of the endoscope; and the power supply circuit is connected between the front end and the tail end of the endoscope, one end of the power supply circuit is connected with the LED light source module, and the other end of the power supply circuit extends out of a power supply port at the tail end of the endoscope and is connected with a power supply.

Description

Oblique-emission LED dodging lighting system for endoscope

Technical Field

The invention belongs to the technical field of medical auxiliary instruments, and particularly relates to an oblique-emission LED dodging lighting system for an endoscope.

Background

In recent years, the popularization and popularization of minimally invasive surgery technology in the global range promote the development of minimally invasive medical instruments, and endoscope minimally invasive medical instruments are the most representative. Endoscopes, as a medical instrument for optical imaging purposes, are important components of illumination systems. The endoscope extends into the cavity to take images, and a self-contained light source is needed to carry out auxiliary illumination to ensure clear imaging. The design of the illumination system directly determines the imaging performance of the endoscopic imaging system.

Currently, endoscope illumination systems are divided into two forms, front illumination and rear illumination; the rear lighting means that light emitted by a lighting source of the endoscope main machine is transmitted to a light outlet at the front end of the endoscope probe through a light guide device. The optical fiber is widely used as a light guide material of a rear illumination system of an endoscope with unique advantages of photoelectric separation, good flexibility and the like; the front lighting is to inlay the lighting source on the surface of the endoscope probe lens and avoid the position of the central camera, and the lighting source is lighted by constant current power supply. The LED has the advantages of high light emitting efficiency, good light beam directivity, large light emitting angle, good color reproducibility, small size, long service life, high reliability, and the like, and has been widely used in various light source lighting systems. But currently, no relevant product directly applies the LED to the endoscope front lighting system.

The rear illumination mainly based on the optical fiber illumination has the following two problems compared to the front illumination. On one hand, the endoscope illumination optical fiber is difficult to install, and for an endoscope system with a non-zero viewing angle, a certain measure needs to be adopted at an optical fiber outlet of the head of the endoscope to change the light emitting direction, so that the light emitting direction of the optical fiber is consistent with the direction of the visual axis of the endoscope. On the other hand, as the surrounding tissues of the cavity to be examined are complex, for an endoscope system with a large view field, the brightness of the edge of the view field is reduced due to uneven illumination, and the information of the surrounding tissues in the cavity cannot be obtained due to strong light reflection at the center of the view field, or the brightness of the central view field is saturated or even the visual information of the central area is lost.

In order to solve the above problems of optical fiber illumination, the conventional solution is to manually change the illumination direction of the optical fiber when the illumination optical fiber is installed, artificially enlarge the divergence angle of the optical fiber bundle, and fix the optical fiber bundle by using optical fiber glue. Therefore, the light emitting direction of the optical fiber can be kept consistent with the visual axis direction of the endoscope, and the illumination uniformity is improved to a certain extent. However, the method does not fundamentally solve the two problems of optical fiber illumination, and the method only depends on manual operation, so that uncertainty is inevitably introduced, and the problems of poor product consistency and the like are caused.

Disclosure of Invention

The invention aims to provide an oblique-emission LED dodging lighting system for an endoscope, which solves the problems of high installation difficulty, poor direction consistency and poor lighting uniformity of an optical fiber lighting system in the prior art; the LED is used as a light source, and the advantages of large divergence angle and high uniformity of the LED light source are utilized to improve the divergence angle and the uniformity of the endoscope illumination system; meanwhile, an oblique-emission LED lighting structure design is provided to ensure that the light emitting direction of the LED is consistent with the visual axis direction of the endoscope. The system can ensure that the illumination direction of the non-zero viewing angle endoscope is consistent with the direction of the visual axis of the endoscope, greatly improve the divergence angle of the illumination system of the endoscope and improve the illumination uniformity. In addition, the cost of the LED as a light source is far lower than that of optical fiber illumination, the installation difficulty is greatly reduced, the production efficiency is improved, and the cost of the endoscope is greatly reduced.

To achieve the above object, the present invention provides an oblique-emission LED dodging illumination system for an endoscope, comprising:

a light source positioning member arranged at the front end of the endoscope;

the LED light source module is fixed on the light source positioning piece, and the light emitting direction of the LED light source module is consistent with the direction of the visual axis of the endoscope;

and the power supply circuit is connected between the front end and the tail end of the endoscope, one end of the power supply circuit is connected with the LED light source module, and the other end of the power supply circuit extends out of a power supply port at the tail end of the endoscope and is connected with a power supply.

The light source positioning piece is of a metal structure, the interior of the metal structure is of a hollow structure, light source mounting holes are formed in two sides of the metal structure, and the angles of the light source mounting holes and the visual axis of the endoscope are the same; the LED light source module is arranged in the light source mounting hole.

The metal structure is made of stainless steel materials.

The LED light source module comprises a PCB (printed circuit board) detachably connected to the light source mounting hole and an LED chip mounted on the PCB, and the light emitting direction of the LED chip is consistent with the direction of the visual axis of the endoscope.

The invention has the beneficial effects that: the inclined-emission LED uniform-light illumination system for the endoscope adopts the LED to replace an optical fiber as a light source, improves the illumination divergence angle and uniformity of the endoscope by utilizing the characteristics of large divergence angle, high uniformity and the like of the LED, and adopts an inclined-emission annular light-emitting design to ensure that the emergent light of the illumination system is consistent with the visual axis direction of the endoscope. Compared with an optical fiber system, the LED light source module has the advantages that the assembly requirement is greatly reduced, the assembly efficiency can be improved, the LED light source modules with different spectral bands can be replaced according to different illumination requirements, and the universality is high. Finally, the price of the LED chip is far lower than that of the optical fiber, so that the cost of the endoscope can be greatly reduced by adopting the LED as a light source.

Drawings

FIG. 1 is a schematic view of an integral structure of an endoscope of an oblique-emission LED dodging illumination system for an endoscope according to the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1;

FIG. 3 is a side view of a light source positioning member in an oblique-emission LED dodging lighting system for an endoscope according to the present invention;

FIG. 4 is a front view of a light source positioning member in the oblique-emission LED dodging lighting system for an endoscope according to the present invention;

FIG. 5 is a schematic structural diagram of LEd light source module in the oblique-emitting LED dodging lighting system for endoscope of the present invention;

wherein: 1. the endoscope comprises a light source positioning piece, 101, a metal structure, 102, a hollow structure, 103, a light source mounting hole, 2, an LED light source module, 201, a PCB board, 202, an LED chip, 3, a power supply circuit, 4, a power supply port, 5, an endoscope inner tube, 6 and an endoscope outer tube.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings.

The invention discloses an oblique-emission LED dodging lighting system for an endoscope, which comprises:

a light source positioning member 1 provided at the front end of the endoscope;

the LED light source module 2 is fixed on the light source positioning piece 1, and the light emitting direction of the LED light source module 2 is consistent with the direction of the visual axis of the endoscope;

and the power supply circuit 3 is connected between the front end and the tail end of the endoscope, one end of the power supply circuit 3 is connected with the LED light source module 2, and the other end of the power supply circuit extends out of a power supply port 4 at the tail end of the endoscope and is connected with a power supply.

The light source positioning piece 1 is of a metal structure 101, the interior of the metal structure 101 is of a hollow structure 102, light source mounting holes 103 are formed in two sides of the metal structure, and the angles of the light source mounting holes 103 and the visual axis of the endoscope are the same; the LED light source module 2 is mounted in the light source mounting hole 103.

The metal structure 101 is made of stainless steel.

The LED light source module 2 comprises a PCB 201 detachably connected to the light source mounting hole 103 and an LED chip 202 mounted on the PCB 201, and the light emitting direction of the LED chip 202 is consistent with the direction of the visual axis of the endoscope.

The non-zero viewing direction angle means that the direction of the visual axis of the endoscope forms a certain angle with the main shaft of the endoscope body of the endoscope, and the design is not limited to the non-zero viewing direction angle and is also suitable for the endoscope with the zero viewing direction angle. The oblique emergent optical fiber lighting system is characterized in that the head of the light source is designed, and the emergent direction of the light source is limited to form a certain angle with the main shaft of the endoscope body through the light source positioning piece 1, wherein the angle is consistent with the direction of the visual axis of the endoscope.

The present invention will be described in detail below with reference to the accompanying drawings by taking a 30 ° viewing angle endoscope as an example:

the oblique emergent LED dodging lighting system is a lighting system for an endoscope, is designed the same as a general endoscope optical fiber lighting system, and is shown in the attached figure 1, firstly, the endoscope is divided into an endoscope outer tube 6 and an endoscope inner tube 5, a lens and the like which are responsible for imaging are arranged in the endoscope inner tube 5, and the endoscope inner tube 5 and the endoscope outer tube 6 are coaxially arranged; the space between the endoscope outer tube 6 and the endoscope inner tube 5 is a channel of the endoscope illumination LED power supply line 3; the tail end of the endoscope is provided with a power supply port 4 for connecting a power supply. Different from the optical fiber lighting system, referring to fig. 2, an obliquely emergent light source positioning piece 1 is arranged at the head of the endoscope, the emergent direction of an LED light source module 2 is limited to an angle of 30 degrees, and then a window sheet is arranged at the outermost end of the head of the endoscope.

Referring to fig. 3 and 4, the material of the light source positioning member 1 of the present invention is 304 stainless steel. The end face and the side wall of the light source positioning piece 1 form an angle of 60 degrees to ensure that the light emitting direction is 30 degrees, the middle of the light source positioning piece 1 is a hollow structure 102, light source mounting holes 103 of the LED light source modules 2 are reserved on two sides of the light source positioning piece, the hollow structure 102 is used for mounting the endoscope inner tube 5, the direction of the light source mounting holes 103 is perpendicular to the end face, and the LED light emitting angle is 30 degrees.

Referring to fig. 5, a group of LED light source modules 2 is disposed in each light source mounting hole 103, and each group of light source modules is composed of two LED lamp beads. The design of the PCB board 201 is designed to match the oblique projecting positioning member, and the shape and size are consistent with the light source mounting hole 103 in the LED light source module 2.

Claims

1. An angled-emission LED dodging system for an endoscope, comprising:

a light source positioning member (1) arranged at the front end of the endoscope;

the LED light source module (2) is fixed on the light source positioning piece (1), and the light emitting direction of the LED light source module (2) is consistent with the direction of the visual axis of the endoscope;

and the power supply circuit (3) is connected between the front end and the tail end of the endoscope, one end of the power supply circuit (3) is connected with the LED light source module (2), and the other end of the power supply circuit extends out of a power supply port (4) at the tail end of the endoscope and is connected with a power supply.

2. The oblique-emission LED dodging lighting system for the endoscope, as claimed in claim 1, wherein said light source positioning member (1) is a metal structure (101), the interior of said metal structure (101) is a hollow structure (102), light source mounting holes (103) are arranged on two sides of said metal structure, and the angles of said light source mounting holes (103) and the visual axis of the endoscope are the same; the LED light source module (2) is installed in the light source installation hole (103).

3. The oblique-emission LED dodging system for endoscope, according to claim 2, wherein said metal structure (101) is made of stainless steel material.

4. The oblique-emission LED dodging lighting system for the endoscope, as claimed in claim 2 or 3, wherein the LED light source module (2) comprises a PCB (201) detachably connected to the light source mounting hole (103) and an LED chip (202) mounted on the PCB (201), and the light emitting direction of the LED chip (202) is consistent with the visual axis direction of the endoscope.