阅读说明：本技术 一种光纤倒像器的外形成型方法 (Shape forming method of optical fiber image inverter ) 是由 骆志财 何相平 付志华 李建杰 于 2019-09-24 设计创作，主要内容包括：本发明公开了一种光纤倒像器的外形成型方法,包括以下步骤：1)将光纤倒像器毛胚180°扭转,得到第一次光纤倒像器半成品；2)加工第一次光纤倒像器半成品,得到第二次光纤倒像器半成品,第二次光纤倒像器半成品的外径尺寸大于光纤倒像器成品有效传像区域尺寸；3)压制成型第二次光纤倒像器半成品,得到第三次光纤倒像器半成品,第三次光纤倒像器半成品的外形尺寸与光纤倒像器成品的外形尺寸相一致；4)加工修正第三次光纤倒像器半成品,得到光纤倒像器成品。采用本法加工得到的光纤倒像器成品,其有效传像区域内光纤的路径更长了,减少了扭转过程中光纤的变形,改善了产品的质量。同时可使光纤倒像器毛胚尺寸大幅度减小,降低了扭转的难度。(The invention discloses a shape forming method of an optical fiber image inverter, which comprises the following steps: 1) twisting the blank of the optical fiber image inverter for 180 degrees to obtain a first semi-finished product of the optical fiber image inverter; 2) processing the first semi-finished product of the optical fiber image inverter to obtain a second semi-finished product of the optical fiber image inverter, wherein the outer diameter size of the second semi-finished product of the optical fiber image inverter is larger than the effective image transmission area size of the finished product of the optical fiber image inverter; 3) pressing and molding the second semi-finished product of the optical fiber inverter to obtain a third semi-finished product of the optical fiber inverter, wherein the shape size of the third semi-finished product of the optical fiber inverter is consistent with the shape size of the finished product of the optical fiber inverter; 4) and processing and correcting the third semi-finished product of the optical fiber image inverter to obtain a finished product of the optical fiber image inverter. The optical fiber image inverter finished product processed by the method has longer path of the optical fiber in the effective image transmission area, reduces the deformation of the optical fiber in the twisting process and improves the product quality. Meanwhile, the size of the blank of the optical fiber image inverter can be greatly reduced, and the difficulty of torsion is reduced.)

1. a method for forming the appearance of an optical fiber image inverter is characterized by comprising the following steps:

1) Carrying out 180-degree torsion processing on the blank of the optical fiber image inverter to obtain a first semi-finished product of the optical fiber image inverter;

2) Processing the first semi-finished product of the optical fiber image inverter to obtain a second semi-finished product of the optical fiber image inverter, wherein the outer diameter size of the second semi-finished product of the optical fiber image inverter is larger than the size of an effective image transmission area of the finished product of the optical fiber image inverter;

3) Carrying out compression molding processing on the second semi-finished optical fiber inverter to obtain a third semi-finished optical fiber inverter, wherein the overall dimension of the third semi-finished optical fiber inverter is consistent with that of the finished optical fiber inverter;

4) and processing and correcting the third semi-finished product of the optical fiber image inverter to obtain a finished product of the optical fiber image inverter.

2. The method for forming the outer shape of the optical fiber inverter according to claim 1, wherein: in the step 2), the outer diameter of the semi-finished product of the secondary optical fiber image inverter is at least 0.2mm larger than the effective image transmission area of the finished product of the optical fiber image inverter.

3. the method for forming the outer shape of the optical fiber inverter according to claim 1, wherein: in step 3), the shape of the finished product of the optical fiber inverter comprises a step, the semi-finished product of the second optical fiber inverter is in an optical axis shape, the step of the semi-finished product of the third optical fiber inverter is formed by pressing and forming, and the optical fiber path in the effective image transmission area of the semi-finished product of the third optical fiber inverter is longer than the optical fiber path in the effective image transmission area of the semi-finished product of the second optical fiber inverter which is not pressed and formed under the same height.

4. the method of claim 3, wherein: the method comprises the following steps of realizing press forming processing through a press forming die, wherein the press forming die comprises a first pressing die and a second pressing die, the first pressing die and the second pressing die are coaxially arranged and can move relatively, and the shape of a die cavity formed after the first pressing die and the second pressing die are combined is consistent with the shape of a finished product of the optical fiber image inverter; and firstly, mounting the second-time optical fiber inverter semi-finished product between a first pressing die and a second pressing die, and then driving the first pressing die and the second pressing die to relatively move until the die assembly is completed, thereby obtaining the third-time optical fiber inverter semi-finished product.

5. The method of claim 3, wherein: and the second semi-finished optical fiber inverter is heated and then subjected to compression molding, and the heating part of the second semi-finished optical fiber inverter is subjected to compression molding to form the step of the third semi-finished optical fiber inverter.

Technical Field

The invention relates to the technical field of manufacturing of optical fiber image transmission elements, in particular to a shape forming method of an optical fiber image inverter.

Background

The optical fiber image transmitting element is an optical element formed by fusing a large number of optical fibers in a regular arrangement, and can transmit an image from one end face to the other end face according to a predetermined rule. The series products of optical fiber panels, optical fiber image inverters, optical fiber cones, optical fiber image transmission bundles and the like are typical representatives of the optical fiber image transmission element. The products are widely applied in the technical fields of low-light night vision, medical treatment, display, detection, biological identification and the like.

the optical fiber image inverter is manufactured by reheating and twisting on the basis of the optical fiber panel, and the product can invert the transmitted image by 180 degrees and output the image. Because the optical fiber image inverter has the advantages of small volume, light weight and the like, the product is usually adopted to solve the problem of image inversion of a front-end imaging system in a low-light-level night vision image intensifier. Fig. 1 is an imaging schematic diagram of a conventional optical fiber inverter, and the optical fiber inverter is generally processed into two shapes, fig. 2-a and fig. 2-B, each having a step, for convenience of later assembly and use.

Fig. 3-a and 3-B are schematic diagrams of the paths of the fiber optic inverter fibers shown in fig. 2-a and 2-B, respectively. The optical fiber of the step part outside the effective image transmission area of the optical fiber image inverter does not participate in image transmission and only plays a role of filling and forming the appearance.

At present, the process steps for manufacturing the optical fiber image inverter are firstly twisting and reprocessing, and then twisting 180 degrees, and then grinding the product to the corresponding external dimension through optical cold processing. In the existing process production, in order to ensure the overall dimension, the overall dimension of a twisted blank needs to be increased, so that the twisting difficulty is increased, the twisting manufacturing technology of the short and large-profile optical fiber image inverter is very difficult, and the space for improving the product quality is limited.

And, when the optical fiber inverter is heated and twisted, the constituent optical fibers of the optical fiber inverter are longitudinally drawn, and the larger the diameter, the shorter the height, and the greater the degree of drawing of the optical fiber. When the optical fiber is stretched and deformed beyond a certain degree, the light transmission performance of the optical fiber is affected, and a series of problems such as image distortion transmitted by the optical fiber image inverter are caused.

In order to prevent the problems of distortion and the like of images transmitted by the optical fiber image inverter, the problems are generally solved by increasing the size of a product and reducing the deformation of an optical fiber in a twisting and stretching process. The use of this method limits the fabrication of short, large outer diameter fiber optic inverters. Accordingly, there is a need to provide a new method of forming a fiber optic inverter that achieves image inversion on a relatively short product while avoiding the distortion problem of the delivered image.

Disclosure of Invention

the invention aims to solve at least one technical problem in the prior art, and provides a shape forming method of an optical fiber image inverter, which can reduce the twisting difficulty of the optical fiber image inverter with short height and large outer diameter, is beneficial to improving the quality of the optical fiber image inverter product and avoids the problem of image transmission distortion.

according to an embodiment of the first aspect of the present invention, there is provided a method for profiling an optical fiber inverter, including the steps of:

1) Carrying out 180-degree torsion processing on the blank of the optical fiber image inverter to obtain a first semi-finished product of the optical fiber image inverter;

2) Processing the first semi-finished product of the optical fiber image inverter to obtain a second semi-finished product of the optical fiber image inverter, wherein the outer diameter size of the second semi-finished product of the optical fiber image inverter is larger than the size of an effective image transmission area of the finished product of the optical fiber image inverter;

3) Carrying out compression molding processing on the second semi-finished optical fiber inverter to obtain a third semi-finished optical fiber inverter, wherein the overall dimension of the third semi-finished optical fiber inverter is consistent with that of the finished optical fiber inverter;

4) And processing and correcting the third semi-finished product of the optical fiber image inverter to obtain a finished product of the optical fiber image inverter.

has the advantages that: the second-time semi-finished product of the optical fiber image inverter is subjected to press forming processing, so that the path of the optical fiber in the effective image transmission area is effectively changed. The third-time semi-finished product of the optical fiber image inverter with the steps, which is obtained by press forming, has longer path of the optical fiber in the effective image transmission area, so that the optical fiber in the twisting area can be increased without changing the height of the product, the deformation of the optical fiber in the twisting process is reduced, and the improvement of the quality of the finished product of the optical fiber image inverter is facilitated. Meanwhile, the step part without imaging is formed by pressing and shrinking, when the blank of the optical fiber image inverter is manufactured, the size of the step can be not considered, only the size of an effective image transmission area is considered, and then the size of the blank of the optical fiber image inverter can be greatly reduced, so that the difficulty of torsion is reduced, and the manufacturing of the optical fiber image inverter with larger outer diameter is facilitated.

According to the method for forming the outer shape of the optical fiber inverter in the embodiment of the first aspect of the present invention, in step 2), the outer diameter of the semi-finished product of the secondary optical fiber inverter is at least 0.2mm larger than the effective image transmission area of the finished product of the optical fiber inverter.

According to the method for forming the shape of the optical fiber inverter according to the embodiment of the first aspect of the present invention, in step 3), the shape of the finished optical fiber inverter includes a step, the second semi-finished optical fiber inverter is in an optical axis shape, the step of the third semi-finished optical fiber inverter is formed by press molding, and the optical fiber path in the effective image transmission area of the third semi-finished optical fiber inverter is longer than the optical fiber path in the effective image transmission area of the second semi-finished optical fiber inverter that is not subjected to press molding at the same height.

According to the method for forming the external shape of the optical fiber inverter according to the embodiment of the first aspect of the invention, the press forming process is realized by a press forming die, the press forming die comprises a first pressing die and a second pressing die, the first pressing die and the second pressing die are coaxially arranged and can relatively move, and the shape of a die cavity formed by the combination of the first pressing die and the second pressing die is consistent with the external shape of the finished optical fiber inverter; and firstly, mounting the second-time optical fiber inverter semi-finished product between a first pressing die and a second pressing die, and then driving the first pressing die and the second pressing die to relatively move until the die assembly is completed, thereby obtaining the third-time optical fiber inverter semi-finished product.

According to the method for forming the shape of the optical fiber inverter of the embodiment of the first aspect of the invention, the second semi-finished optical fiber inverter is heated and then subjected to press forming, and the heated portion of the second semi-finished optical fiber inverter is subjected to press forming to form the step of the third semi-finished optical fiber inverter.

Drawings

The invention is further illustrated with reference to the following figures and examples:

FIG. 1 is a schematic diagram of an imaging of a conventional fiber optic inverter;

FIG. 2-A is a schematic diagram of one of the profiles of a conventional fiber optic inverter;

FIG. 2-B is a schematic view of another profile of a conventional fiber optic inverter;

FIG. 3-A is a schematic view of the optical fiber path of the optical fiber inverter corresponding to FIG. 2-A;

FIG. 3-B is a schematic diagram of the optical fiber path of the optical fiber inverter corresponding to FIG. 2-B;

FIG. 4-A is a schematic diagram of a fiber path of a fiber optic inverter according to an embodiment of the present invention;

Fig. 4-B is a schematic diagram of an optical fiber path of another optical fiber inverter according to an embodiment of the invention.

Detailed Description

Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.