WO2020019280A1

WO2020019280A1 - Collimator and optical guide tube

Info

Publication number: WO2020019280A1
Application number: PCT/CN2018/097344
Authority: WO
Inventors: 明伟杰; 高峻; 宋李烟; 梁为亮; 杨里珍
Original assignee: 深圳永士达医疗科技有限公司
Priority date: 2018-07-23
Filing date: 2018-07-27
Publication date: 2020-01-30
Also published as: CN109061805A

Abstract

Provided is a collimator (100), comprising a capillary tube (30) and an optical fiber (40), wherein part of the optical fiber (40) is accommodated in the capillary tube. The collimator also comprises a glass bushing (10) and a self-focusing lens (20). The capillary tube and the self-focusing lens are partially plugged into the glass bushing and fixed by the glass bushing. The self-focusing lens comprises a light-reflecting surface and a light-transmitting surface. A light beam in the optical fiber is collimated by the self-focusing lens at a proper distance, and then the light beam is reflected by the light-reflecting surface and emitted by the light-transmitting surface, wherein the angle of the light beam is altered by 90 degrees. The present invention can effectively reduce a length of a collimator by more than 1 mm, simplify a manufacturing process of the collimator, and meanwhile meet requirements with respect to working distance and speckle size.

Description

Collimator and optical conduit connection structure

Technical field

The invention relates to the field of medical equipment, and in particular to a collimator.

Background technique

The probe of the swept-frequency OCT optical imaging system needs to change the direction of the beam by 90 ° to detect the target. In the existing market, 45 ° refractive prisms are basically used to attach to the collimator. This method increases the process and It will take up space, which is a great limitation on the limited space in medical treatment, which leads to inconvenience in use.

Summary of the Invention

In order to overcome the shortcomings of the prior art, an object of the present invention is to provide a collimator with a simple structure and a small size.

The objective of the present invention is achieved by the following technical solutions:

A collimator includes a capillary tube and an optical fiber. The optical fiber portion is contained in the capillary tube. The collimator further includes a glass sleeve and a self-focusing lens. The capillary tube and the self-focusing lens portion are plugged in Inside the glass sleeve and fixed to the glass sleeve, the self-focusing lens includes a reflecting surface and a light emitting surface, a light beam in the optical fiber is reflected from the light reflecting surface and exits from the light emitting surface, and the beam angle changes 90 degrees.

Further, there is a gap between the capillary and the self-focusing lens.

Further, the width of the gap is 0-0.7 mm.

Further, the self-focusing lens includes a light incident surface, the light incident surface forms an edge on one side of the gap, and the light incident surface forms an acute angle with the vertical direction.

Further, the included angle is 8 °.

Further, the light incident surface is oval.

Further, the capillary is provided with a capillary light emitting surface, and the capillary light emitting surface is located at the other edge of the gap and is parallel to the light incident surface.

Further, the self-focusing lens includes a reflecting surface and a light emitting surface, the reflecting surface is an inclined surface, the light emitting surface is a plane parallel to a horizontal plane, and the intersection of the reflecting surface and the light emitting surface is a straight line.

An optical catheter connection structure includes an optical fiber and a capillary tube, and the optical fiber is partially connected to the capillary tube. The optical tube connection structure further includes a glass sleeve and a self-focusing lens, and the capillary tube and the self-focusing lens are respectively partially The glass tube is inserted at opposite ends of the glass tube and fixed to the glass tube, and a gap is formed between the capillary tube and the self-focusing lens.

Further, the capillary tube and the self-focusing lens are respectively fixed to the glass sleeve by glue.

Compared with the prior art, the collimator of the present invention further includes a glass tube and a self-focusing lens. The capillary tube and the self-focusing lens are partially inserted into the glass tube and fixed to the glass tube. The self-focusing lens includes a reflective surface and a light-emitting surface. The light beam in the fiber is collimated by the self-focusing lens at a suitable distance, and then reflected from the reflective surface and emitted from the light emitting surface. The beam angle is changed by 90 degrees, which can effectively shorten the length of the collimator by more than 1mm and simplify the manufacturing process of the collimator It can change the direction of the beam by 90 ° without bonding 45 ° refractive prisms, and can also meet the special requirements for working distance and spot size.

BRIEF DESCRIPTION OF THE DRAWINGS

1 is a perspective view of a collimator according to the present invention;

2 is a cross-sectional view of the collimator of FIG. 1;

3 is a schematic diagram of the internal structure of the collimator of FIG. 1;

FIG. 4 is an optical path diagram of a self-focusing lens of the collimator of FIG. 1.

In the picture: 100, collimator; 10, glass tube; 20, self-focusing lens; 21, reflective surface; 22, light emitting surface; 23, light incident surface; 30, capillary; 32, capillary light emitting surface; 40, optical fiber ; 50, tail glue; 60, clearance.

detailed description

In the following, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that when called "fixed to" another, it can be directly on the other or it can also be centered. When one is considered to be "connected" to the other, it can be directly connected to the other or may be centered simultaneously. When one is considered to be "set on" the other, it can be set directly on the other or it may be centered simultaneously. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

Please refer to FIGS. 1 to 4. A collimator 100 according to the present invention includes a glass tube 10, a self-focusing lens 20, a capillary 30, an optical fiber 40, and an adhesive 50.

The self-focusing lens 20 includes a light reflecting surface 21, a light emitting surface 22 and a light incident surface 23. The self-focusing lens 20 has a cylindrical shape as a whole. The light incident surface 23 is located at an end of one end of the self-focusing lens 20 and has an oval shape. The light incident surface 23 is an inclined surface and forms an acute angle with the vertical direction. Preferably, the included angle is 8 °. The light reflecting surface 21 and the light emitting surface 22 are located at opposite ends of the self-focusing lens 20. The reflective surface 21 is semi-elliptical. The angle between the reflecting surface 21 and the horizontal plane is 45 °. The light emitting surface 22 is a plane and is parallel to the horizontal plane. The intersection of the light emitting surface 22 and the reflecting surface 21 is a straight line. The length of the light emitting surface 22 is 0.8 mm.

The capillary 30 is provided with a through hole in the center. The capillary 30 is provided with a capillary light emitting surface 32. The capillary light emitting surface 32 is located at an end of the capillary 30. The capillary light exit surface 32 is an inclined surface and has an oval shape. The capillary light exit surface 32 forms an acute angle with the vertical direction. Preferably, the included angle is 8 °.

When the collimator 100 is assembled, the optical fiber 40 is accommodated in the through hole of the capillary tube 30, and the optical fiber 40 and the capillary tube 30 are fixed with glue to form a tail glue 50. The capillary tube 30 and the self-focusing lens 20 are respectively partially inserted at opposite ends of the glass sleeve 10 and fixed to the glass sleeve 10 by glue. At this time, the reflective surface 21 and the light emitting surface 22 extend out of the glass sleeve 10. A gap 60 is formed between the capillary tube 30 and the self-focusing lens 20. The width of the gap 60 is 0-0.7 mm.

When the collimator 100 is used, light is emitted from the optical fiber 40 to form a point light source. The light enters the self-focusing lens 20 from the light incident surface 23, is collimated by the self-focusing lens 20, is reflected by the reflective surface 21, and exits from the light emitting surface 22, resulting in a 90 ° turn. Through the design of the collimator 100, the length of the collimator 100 can be effectively shortened by more than 1mm, and the manufacturing process of the collimator 100 is simplified. The 45 ° refraction prism can be used to change the direction of the beam by 90 °. It can meet the special requirements of working distance and spot size.

The invention also relates to an optical conduit connection structure, which includes a glass sleeve 10, a self-focusing lens 20, a capillary 30, an optical fiber 40, and a tail glue 50. The optical fiber 40 is accommodated in the through hole of the capillary tube 30, and the optical fiber 40 and the capillary tube 30 are fixed with glue to form a tail glue 50. The capillary tube 30 and the self-focusing lens 20 are respectively partially inserted at opposite ends of the glass sleeve 10 and fixed to the glass sleeve 10 by glue. A gap 60 is formed between the capillary tube 30 and the self-focusing lens 20. The width of the gap 60 is 0-0.7 mm.

For those skilled in the art, according to the technical solutions and concepts described above, various other corresponding changes and deformations can be made, and all these changes and deformations should fall within the protection scope of the claims of the present invention.

Claims

A collimator includes a capillary tube and an optical fiber, and the optical fiber is partially contained in the capillary tube, wherein the collimator further includes a glass sleeve and a self-focusing lens, and the capillary tube and the self-focusing lens Partly inserted into the glass sleeve and fixed to the glass sleeve, the self-focusing lens includes a reflective surface and a light emitting surface, and the light beam in the optical fiber is reflected from the light reflecting surface and exits from the light emitting surface. The beam angle changes by 90 degrees.
The collimator according to claim 1, wherein a gap exists between the capillary and the self-focusing lens.
The collimator according to claim 2, wherein a width of the gap is 0-0.7 mm.
The collimator according to claim 2, wherein the self-focusing lens includes a light incident surface, the light incident surface forms an edge on one side of the gap, and the light incident surface forms an acute angle with a vertical direction Angle.
The collimator according to claim 4, wherein the included angle is 8 °.
The collimator according to claim 4, wherein the light incident surface is elliptical.
The collimator according to claim 4, wherein the capillary is provided with a capillary light emitting surface, and the capillary light emitting surface is located at the other edge of the gap and is parallel to the light incident surface.
The collimator according to claim 1, wherein the self-focusing lens includes a reflective surface and a light-emitting surface, the reflective surface is an inclined surface, the light-emitting surface is a plane parallel to a horizontal plane, and the reflective light The intersection of the surface and the light emitting surface is a straight line.
An optical tube connection structure includes an optical fiber and a capillary tube, and the optical fiber is partially connected to the capillary tube, wherein the optical tube connection structure further includes a glass sleeve and a self-focusing lens, the capillary tube and the self-focusing lens. Focusing lenses are partially inserted at opposite ends of the glass sleeve and fixed to the glass sleeve, and a gap is formed between the capillary tube and the self-focusing lens.
The connection structure of an optical catheter according to claim 9, wherein the capillary tube and the self-focusing lens are respectively fixed to the glass sleeve by glue.