阅读说明：本技术 光学纤维锥及其加工方法 (Optical fiber taper and method of processing the same ) 是由 付杨 王久旺 黄永刚 冯跃冲 张弦 周游 王云 于 2018-07-17 设计创作，主要内容包括：本申请提供一种光学纤维锥及其加工方法,前述的光学纤维锥包括大端面部、小端面部和平滑过渡部；平滑过渡部位于大端面部和小端面部之间；组成光学纤维锥的多根光纤均由大端面部、平滑过渡部延伸至小端面部；在大端面部,各根光纤平行地设置；在小端面部,各根光纤平行地设置。本申请提供的光学纤维锥,在大端面部和小端面部中,各根光纤均平行的设置,相比于现有的单直区光锥,此光学纤维锥安装在光学设备中,与光学设备中的其他光学器件之间具有更好的耦合效率。(The application provides an optical fiber cone and a processing method thereof, wherein the optical fiber cone comprises a large end surface part, a small end surface part and a smooth transition part; the smooth transition portion is located between the large end face portion and the small end face portion; the plurality of optical fibers forming the optical fiber cone extend to the small end surface part from the large end surface part and the smooth transition part; at the large end face portion, the respective optical fibers are arranged in parallel; at the small end surface portion, the respective optical fibers are arranged in parallel. The application provides an optical fiber awl, in big terminal surface portion and little terminal surface portion, the equal parallel setting of each optic fibre compares in current single straight district light cone, and this optical fiber awl is installed in optical equipment, and has better coupling efficiency between other optical devices in the optical equipment.)

1. An optical fiber taper, comprising: comprises a large end surface part, a small end surface part and a smooth transition part; the smooth transition is located between the large face portion and the small face portion;

a plurality of optical fibers constituting the optical fiber taper each extend from the large end face portion, the smooth transition portion to the small end face portion;

at the large end surface portion, the respective optical fibers are arranged in parallel;

the respective optical fibers are arranged in parallel at the small end surface portion.

2. The optical fiber taper of claim 1, wherein:

the cross section of the end face of the large end face part and/or the small end face part is rectangular.

3. A method of manufacturing an optical fiber taper as claimed in claim 1, wherein the optical fiber taper is formed by drawing a taper blank using a horizontal drawing furnace; characterized in that the method comprises:

positioning a first end of the light cone blank, stretching the light cone blank at a second end at a first speed, and rotating the light cone blank alternately in forward and reverse directions; simultaneously, moving the stretching inner furnace at a first speed, and then moving the stretching inner furnace at a second speed;

wherein: the second speed is opposite to the first speed in direction, and the ratio of the second speed to the first speed is a/b; a is the cross-sectional area of the light cone blank in the stretching inner furnace area when the stretching inner furnace is moved at the first speed; b is the cross-sectional area of the end part of the light cone blank;

and cutting the light cone blank in the area with the cross-sectional area a to obtain the optical fiber cone.

4. The method of claim 3, wherein the optical fiber taper is processed,

after the moving the stretching inner furnace at the second speed, the method further comprises the following steps: moving the stretching inner furnace at a third speed until two areas with smooth transition cross-sectional areas in the light cone blank are symmetrically arranged;

wherein the third speed is opposite to the first speed in direction and has the same magnitude.

5. A method of manufacturing an optical fiber taper as claimed in claim 1, wherein the optical fiber taper is formed by drawing a taper blank using a horizontal drawing furnace; characterized in that the method comprises:

positioning a first end of the light cone blank, stretching the light cone blank at a second end at a first speed, and rotating the light cone blank alternately in forward and reverse directions; simultaneously, moving the stretching inner furnace at a first speed, and then moving the stretching inner furnace at a fourth speed;

wherein: the fourth speed and the first speed are in the same direction, the ratio of the fourth speed to the first speed is a/b +1, a is the cross-sectional area of the light cone blank in the stretching inner furnace area when the stretching inner furnace is moved at the first speed, and b is the cross-sectional area of the end part of the light cone blank;

and cutting the light cone blank in the area with the cross-sectional area a to obtain the optical fiber cone.

6. The method of claim 5, wherein the optical fiber taper is processed,

after the moving the stretching inner furnace at the third speed, the method further comprises: moving the stretching inner furnace at a fifth speed until two areas with smooth transition cross-sectional areas in the light cone blank are symmetrically arranged;

wherein the fifth speed and the first speed have the same direction and the same size.

7. A method of manufacturing an optical fiber taper as claimed in claim 1, wherein the optical fiber taper is formed by straightening a taper blank in a horizontal drawing furnace; characterized in that the method comprises:

simultaneously stretching the light cone blank from both ends, and elongating the light cone blank at a first speed;

meanwhile, when the stretching inner furnace is fixed to meet the preset condition, the light cone blank is moved at a sixth speed;

wherein: the ratio of the sixth speed to the first speed is 2a/b, wherein a is the cross-sectional area of the light cone blank in the stretching inner furnace area when the stretching inner furnace is moved at the first speed; b is the cross-sectional area of the end part of the light cone blank;

and cutting the light cone blank in the area with the cross-sectional area of c to obtain the optical fiber cone.

8. The method of claim 7, wherein the optical fiber taper is processed,

after moving the cone blank at the sixth speed, further comprising: and fixing the stretching inner furnace until two smooth transition areas with cross-sectional areas in the light cone blank are symmetrically arranged.

9. A method of processing an optical fiber taper according to claim 1, wherein the method comprises the steps of:

heating the part of the light cone blank in the stretching inner furnace by adopting a stretching inner furnace until the part of the light cone blank in the stretching inner furnace reaches a preset section size;

enabling the light cone blank to move in the vertical direction relative to the stretching inner furnace, and enabling the part of the light cone blank located in the stretching inner furnace to keep the preset section size;

and cutting the light cone blank in an area with a cross section of a preset cross section size to obtain the optical fiber cone.

10. The method of claim 9, wherein the optical fiber taper is processed,

the method further comprises alternately rotating the light cone blank in forward and reverse directions during heating of the light cone blank in the stretching inner furnace.

Technical Field

The application relates to the technical field of optical devices, in particular to an optical fiber cone and a processing method thereof.

Background

An optical fiber taper (hereinafter referred to as a light taper) is an optical device made of a large number of optical fibers through processes of regular arrangement, heating, pressure fusion and stretching; since the light cone has an effect of enlarging and reducing an image by a certain factor and can obtain a small object distance, it becomes one of core elements of an image enhancement device and is widely used in a miniaturized image apparatus and an image digitizing apparatus.

Because of the limitation of the processing technology, the light cone formed by the blank after the stretching technology can only be a single straight area light cone; that is, the extending direction of the optical fiber in the large end face area of the light cone is parallel to the axial lead of the light cone, and the included angle between the extending direction of the optical fiber in the small end face area and the axial lead of the light cone is an acute angle (at present, the included angle between the small end face of the general light cone and the axial lead of the light cone is mostly 30-70 degrees); in practical application, it has been verified that the conventional single straight area light cone cannot meet the application requirements in terms of coupling efficiency, high-quality resolution and the like.

Disclosure of Invention

The application provides an optical fiber cone to solve the technical problems in the background art; in addition, the application also provides a method for processing the optical fiber cone.

The application provides an optical fiber taper, a large end face portion, a small end face portion and a smooth transition portion; the smooth transition is located between the large face portion and the small face portion;

a plurality of optical fibers constituting the optical fiber taper each extend from the large end face portion, the smooth transition portion to the small end face portion;

at the large end surface portion, the respective optical fibers are arranged in parallel;

the respective optical fibers are arranged in parallel at the small end surface portion.

Optionally, the end surface cross section of the large end surface part and/or the small end surface part is rectangular.

The application provides a processing method of an optical fiber cone, which is formed by drawing a light cone blank by a horizontal drawing furnace; the method comprises the following steps:

positioning a first end of the light cone blank, stretching the light cone blank at a second end at a first speed, and rotating the light cone blank alternately in forward and reverse directions; simultaneously, moving the stretching inner furnace at a first speed, and then moving the stretching inner furnace at a second speed;

wherein: the second speed is opposite to the first speed in direction, and the ratio of the second speed to the first speed is a/b; a is the cross-sectional area of the light cone blank in the stretching inner furnace area when the stretching inner furnace is moved at the first speed; b is the cross-sectional area of the end part of the light cone blank;

and cutting the light cone blank in the area with the cross-sectional area a to obtain the optical fiber cone.

Optionally, after moving the stretching inner furnace at the second speed, the method further includes: moving the stretching inner furnace at a third speed until two areas with smooth transition cross-sectional areas in the light cone blank are symmetrically arranged;

wherein the third speed is opposite to the first speed in direction and has the same magnitude.

The application provides another processing method of an optical fiber cone, which is formed by drawing a light cone blank by a horizontal drawing furnace; the method comprises the following steps:

positioning a first end of the light cone blank, stretching the light cone blank at a second end at a first speed, and rotating the light cone blank alternately in forward and reverse directions; simultaneously, moving the stretching inner furnace at a first speed, and then moving the stretching inner furnace at a fourth speed;

wherein: the fourth speed and the first speed are in the same direction, the ratio of the fourth speed to the first speed is a/b +1, a is the cross-sectional area of the light cone blank in the stretching inner furnace area when the stretching inner furnace is moved at the first speed, and b is the cross-sectional area of the end part of the light cone blank;

and cutting the light cone blank in the area with the cross-sectional area a to obtain the optical fiber cone.

Optionally, after moving the stretching inner furnace at the third speed, the method further includes: moving the stretching inner furnace at a fifth speed until two areas with smooth transition cross-sectional areas in the light cone blank are symmetrically arranged;

wherein the fifth speed and the first speed have the same direction and the same size.

The application provides another processing method of an optical fiber cone, which is formed by straightening a light cone blank by a horizontal stretching furnace; the method comprises the following steps:

simultaneously stretching the light cone blank from both ends, and elongating the light cone blank at a first speed;

meanwhile, when the stretching inner furnace is fixed to meet the preset condition, the light cone blank is moved at a sixth speed;

wherein: the ratio of the sixth speed to the first speed is 2a/b, wherein a is the cross-sectional area of the light cone blank in the stretching inner furnace area when the stretching inner furnace is moved at the first speed; b is the cross-sectional area of the end part of the light cone blank;

and cutting the light cone blank in the area with the cross-sectional area of c to obtain the optical fiber cone.

Optionally, after moving the light cone blank at the sixth speed, the method further includes: and fixing the stretching inner furnace until two smooth transition areas with cross-sectional areas in the light cone blank are symmetrically arranged.

The application provides another processing method of an optical fiber cone, which is obtained by processing in a vertical stretching furnace, and the method comprises the following steps:

heating the part of the light cone blank in the stretching inner furnace by adopting a stretching inner furnace until the part of the light cone blank in the stretching inner furnace reaches a preset section size;

enabling the light cone blank to move in the vertical direction relative to the stretching inner furnace, and enabling the part of the light cone blank located in the stretching inner furnace to keep the preset section size;

and cutting the light cone blank in an area with a cross section of a preset cross section size to obtain the optical fiber cone.

Optionally, the method further comprises, during the heating of the light cone blank in the stretching inner furnace, rotating the light cone blank alternately in forward and reverse directions.

The application provides an optical fiber awl, in big terminal surface portion and little terminal surface portion, the equal parallel setting of each optic fibre compares in current single straight district light cone, and this optical fiber awl is installed in optical equipment, and has better coupling efficiency between other optical devices in the optical equipment.

Drawings

FIG. 1 is a schematic cross-sectional view of a fiber optic taper provided in accordance with one embodiment;

FIG. 2 is a schematic structural view of a horizontal drawing furnace used in the optical fiber taper processing method according to the second embodiment to the fourth embodiment;

FIG. 3 is a flow chart of a method for processing an optical fiber taper according to a second embodiment;

FIG. 4 is a schematic longitudinal cross-sectional view of a light cone blank formed after S101;

FIG. 5 is a schematic longitudinal cross-sectional view of a light cone blank formed after S102;

FIG. 6 is a flow chart of a method for processing an optical fiber taper provided in the third embodiment;

FIG. 7 is a flowchart of a method for manufacturing an optical fiber taper according to the fourth embodiment;

FIG. 8 is a schematic structural view of a vertical stretching furnace used in example five;

FIG. 9 is a flowchart of a method for manufacturing an optical fiber taper according to the fifth embodiment;

in fig. 1: 11-large end face portion, 12-small end face portion, 13-smooth transition portion; in fig. 2: 1-a servo motor, 2-a base, 3-a stretching rod, 4-a stretching outer furnace, 5-a stretching inner furnace, 6-a light cone blank, 7-a slide rail and 8-a base; in fig. 4 and 5: 11-light cone blank; in fig. 8: 1-base, 2-slide rail, 3-base, 4-stretching rod, 5-light cone blank, 6-stretching outer furnace, 7-stretching inner furnace and 8-infrared diameter measuring instrument.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the related invention are shown in the drawings.

FIG. 1 is a schematic cross-sectional view of an optical fiber taper provided in the first embodiment. The optical fiber cone (hereinafter referred to as a light cone) provided by the embodiment of the application is composed of a stretched light cone blank, and the light cone blank is obtained by regularly arranging, heating and pressurizing and fusing a plurality of optical fibers.

Referring to fig. 1, the light cone includes a large end surface portion 11, a small end surface portion 12, and a smooth transition portion 13; wherein the smooth transition 13 is located between the large face portion 11 and the small face portion 12. The plurality of optical fibers constituting the aforementioned taper extend from the large end surface portion 11, the smooth transition portion 13 to the small end surface portion 12. In the large end surface portion 11, the respective optical fibers are arranged in parallel; the respective optical fibers are also arranged in parallel at the small end surface portion 12.

Since the respective optical fibers are arranged in parallel at the large end surface portion 11 and the small end surface portion 12, the light cone mentioned in the embodiment of the present application is referred to as a double straight region light cone. Compared with the existing single straight area light cone, the light cone provided by the embodiment of the application is installed in the optical equipment, and has better coupling efficiency with other optical devices in the optical equipment.

In the light cone in the embodiment of the present application, the cross sections of the large end surface portion 11 and the small end surface portion 12 are both circular. In other embodiments, the large end surface portion 11 and the small end surface portion 12 may be milled into a shape having a rectangular cross section according to the shape of the optical device to be coupled. In addition, the large end face and the small end face 12 of the light cone provided by the embodiment of the application can be bent to form a special-shaped light cone.

In addition to providing the aforementioned light cone, the embodiments of the present application also provide several methods for processing the aforementioned light cone. In the second embodiment, the light cone blank is stretched by a horizontal stretching furnace to form the light cone, and in the fifth embodiment, the light cone blank is stretched by a vertical stretching furnace to form the light cone.

In order to better describe the processing method of the light cone in the second embodiment to the fourth embodiment, the structure of the horizontal stretching furnace is briefly described below. FIG. 2 is a schematic structural view of a horizontal drawing furnace used in the optical fiber taper processing method according to the second embodiment to the fourth embodiment; as shown in fig. 2, the horizontal stretching furnace includes a base 8, a slide rail 7, a base 2, a stretching outer furnace 4, a stretching inner furnace 5, a servo motor 1, and a stretching rod 3. The sliding rail 7 is arranged on the base 8, and the base 2 is arranged on the sliding rail 7 and can move along with the sliding rail 7; the stretching rod 3 is horizontally arranged on the base 2 and can clamp a light cone blank 6; the servo motor 1 is mounted on the base 2 and can control the stretching rod 33 to rotate according to a driving program. The stretching outer furnace 4 is fixed on the base 8; the stretching inner furnace 5 is also mounted on the base 8, but is movable in the extending direction of the stretching rod 3. As shown in the figure, two bases 2 are arranged on the base 8; the two bases 2 are respectively mounted on a base 8 through different slide rails 7, and both can move relative to the base 8.