CN110568550A - Shape forming method of optical fiber image inverter - Google Patents
Shape forming method of optical fiber image inverter Download PDFInfo
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- CN110568550A CN110568550A CN201910904331.0A CN201910904331A CN110568550A CN 110568550 A CN110568550 A CN 110568550A CN 201910904331 A CN201910904331 A CN 201910904331A CN 110568550 A CN110568550 A CN 110568550A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/04—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings formed by bundles of fibres
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/255—Splicing of light guides, e.g. by fusion or bonding
- G02B6/2552—Splicing of light guides, e.g. by fusion or bonding reshaping or reforming of light guides for coupling using thermal heating, e.g. tapering, forming of a lens on light guide ends
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Abstract
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.
Description
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.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1, which is an imaging schematic diagram of a conventional optical fiber inverter, for later convenient assembly and use, the optical fiber inverter is generally processed into two shapes, i.e., fig. 2-a and fig. 2-B, and each has a step 1. 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 1 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.
The embodiment of the invention 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 an optical fiber image inverter product and avoids the problem of image transmission distortion. Referring to fig. 4-a and 4-B, there is shown a schematic view of an optical fiber path 2 of a finished optical fiber inverter obtained by the profile shaping method of the present invention. Compared with the existing optical fiber image inverter, the optical fiber path 2 of the finished optical fiber image inverter processed by the method is longer under the same height.
specifically, the method for forming the appearance of the optical fiber image inverter comprises the following steps:
1) And according to a conventional method, carrying out 180-degree torsion processing on the blank of the optical fiber image inverter by using torsion equipment to obtain a first semi-finished product of the optical fiber image inverter.
2) and processing the first semi-finished optical fiber inverter to obtain a second semi-finished optical fiber inverter, wherein the outer diameter of the second semi-finished optical fiber inverter is larger than the effective image transmission area of the second semi-finished optical fiber inverter.
3) And carrying out compression molding processing on the second semi-finished product of the optical fiber inverter through a compression molding die to obtain a third semi-finished product of the optical fiber inverter. The external dimension of the third semi-finished product of the optical fiber image inverter is consistent with that of the finished product of the optical fiber image inverter.
4) and performing cold processing correction on the third semi-finished product of the optical fiber image inverter to obtain a finished product of the optical fiber image inverter.
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 step 1, 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 1 part which is not imaged is formed by pressing and shrinking, when the blank of the optical fiber image inverter is manufactured, the size of the step 1 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.
preferably, 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 size of the effective image transmission area of the finished product of the optical fiber inverter, and the outer diameter of the semi-finished product of the secondary optical fiber inverter is slightly larger than the outer diameter of the finished product of the optical fiber inverter. On one hand, the size required by the blank of the optical fiber image inverter is reduced as much as possible, and on the other hand, the machining allowance of subsequent machining correction is also ensured.
Specifically, the shape of the finished product of the optical fiber image inverter to be processed comprises a step 1, the second semi-finished product of the optical fiber image inverter is in an optical axis shape, and the step 1 of the third semi-finished product of the optical fiber image inverter is formed by pressing and forming. At the same height, the optical fiber path 2 in the effective image transmission area of the third semi-finished optical fiber inverter is longer than the optical fiber path 2 in the effective image transmission area of the second semi-finished optical fiber inverter which is not processed by compression molding.
the method is characterized in that the height of a twisted blank of the optical fiber inverter manufactured by the method is longer than that of a blank in the prior art scheme during twisting, and the twisted blank is compressed to the same height as that of the prior art after twisting is finished, so that the length of the twisted optical fiber is increased, the deformation of the optical fiber during twisting is reduced, the light transmission performance of the optical fiber is ensured, and the problem of image distortion of the optical fiber inverter during transferring is solved. The height of the finished product of the optical fiber image inverter manufactured by the invention is not changed.
The optical fiber image inverter manufactured by the method has the advantages that the non-imaging step 1 part is formed by pressing and shrinking, and the size of the step 1 is not required to be considered when a torsional blank is manufactured, and only the size of an effective image transmission area is required to be considered. Therefore, the outer diameter of the twisting blank can be greatly reduced, and the optical fiber image inverter with larger outer diameter can be manufactured. By the method, the deformation of the twisted optical fiber of the optical fiber image inverter can be reduced under the condition of not increasing the height of the optical fiber image inverter, and the quality of images transmitted by the optical fiber image inverter is improved. Meanwhile, the optical fiber image inverter with short height and large outer diameter can be manufactured more conveniently by compression molding under the condition of ensuring the image transmission of the optical fiber image inverter.
The method needs to use a compression molding die to realize compression molding processing. Specifically, the press forming die comprises a first press die and a second press die, the first press die and the second press die are coaxially arranged, and the press forming die can drive the first press die and the second press die to relatively move. The first die and the second die are relatively moved to the matched die, so that the shape of a die cavity formed by the first die and the second die is consistent with the shape of the finished optical fiber imager.
Before die assembly, the second-time optical fiber imager semi-finished product is arranged between the first pressing die and the second pressing die, and then the first pressing die and the second pressing die are driven to relatively move until die assembly is completed, so that a third-time optical fiber imager semi-finished product is obtained.
In order to ensure that the semi-finished product of the secondary optical fiber image inverter can be smoothly pressed and molded, the device also comprises a heating device, the semi-finished product of the secondary optical fiber image inverter is heated by the heating device, and after the middle part of the secondary optical fiber image inverter is heated and softened, the semi-finished product of the secondary optical fiber image inverter is pressed and molded. And the heating part of the semi-finished product of the optical fiber inverter for the second time is subjected to press forming processing to form a step 1 of the semi-finished product of the optical fiber inverter for the third time.
while the embodiments of the present invention have been described in detail with reference to the drawings, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (5)
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.
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