JPH0596806U - Optical fiber fusion splicer with microscope - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide an optical fiber fusion splicing device with a microscope capable of quickly and accurately connecting a large number of optical fibers of a multi-core optical fiber. [Structure] The microscope of the optical fiber fusion splicing device with a microscope has a variable magnification, and at a high magnification, each optical fiber is accurately aligned and fusion-bonded, and at low magnification, a multi-core before and after fusion splicing is performed. Check the entire optical fiber by putting it in one field
Multi-core optical fiber Quickly and accurately connect a large number of optical fibers of a core wire.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an optical fiber fusion splicing device with a microscope that can quickly and accurately connect optical fibers of multi-core optical fibers.

[0002]

[Prior Art]

 Usually, the optical fiber is covered with a thin plastic protective layer called a primary coat, on which a buffer layer made of a soft material such as silicone rubber is coated, and on top of that a plastic secondary protective layer such as nylon or polyethylene is coated. Has been done. In order to accurately align the optical fibers with each other and connect them, for example, as shown in FIG. 2, the tip of the above-mentioned coating is placed at a predetermined position on the two fixed mounts 5 that face each other. The optical fibers 6 from which the layers have been removed are arranged one by one, and the ends of both optical fibers are butted against each other by moving the moving table 7 close to each other. It was made by the method of melting and fusing. In order to accurately align the ends of the fine optical fibers, the abutting portion 8 is enlarged and observed by the microscope 10 placed above. The microscope often had a single-core optical fiber connected thereto, and thus had a constant magnification.

[0003]

[Problems to be solved by the device]

 However, in recent years, a multi-core optical fiber core wire in which a large number of optical fibers are lined up in the lateral direction has been widely used, and the entire optical fiber of such a multi-core optical fiber core wire is viewed with a conventional microscope with a constant magnification. Therefore, an overall check of the multi-fiber optical fiber before and after fusion, that is, a comprehensive check of the number and length of the optical fibers before fusion and the connection state after fusion, etc. can be performed quickly and There was a problem in that it could not be performed sufficiently, and therefore it took a long time to connect and that a defective connection was overlooked.

[0004]

[Means for solving the problem]

 The present invention has been made as a result of intensive studies in view of such a situation, and its purpose is to provide an optical fiber fusion with a microscope capable of quickly and accurately connecting optical fibers of multi-core optical fibers. It is to provide a destination connection device. That is, the present invention is an optical fiber fusion splicing device with a microscope, wherein the microscope has a variable magnification.

In the present invention, the microscope used in the fusion apparatus is variable in magnification, and each of a large number of optical fibers is greatly magnified at a high magnification to accurately align the axes and perform fusion splicing. This is a low-magnification check of the overall condition of many optical fibers before and after fusion. In the present invention, for changing the magnification of the microscope, any method such as exchanging a normal objective lens can be applied.

[0006]

[Action]

 Since the optical fiber fusion splicing device with a microscope of the present invention has a variable magnification of the microscope, each of a large number of optical fibers of the multi-core optical fiber is greatly enlarged at a high magnification to accurately align the axes. It is possible to perform fusion splicing, and it is possible to check the overall condition of many optical fibers before and after fusion splicing in a single field of view at low magnification, which allows quick connection of multi-core optical fibers. And done exactly.

[0007]

【Example】

Hereinafter, the present invention will be described in detail with reference to embodiments. FIG. 1 is a principle view showing an embodiment of a magnification changing mechanism of a microscope used in the optical fiber fusion splicing apparatus of the present invention. This microscope includes a reflecting mirror 2 tilted on the optical axis of the objective lens 1 at a predetermined angle with respect to the optical axis, and behind the reflecting mirror 2 and on the optical axis at a predetermined angle with respect to the optical axis. A pair of two reflecting mirror groups 3 tilted by is arranged, and an image pickup surface 4 for connecting the image reflected by the reflecting mirror 2 or the reflecting mirror group 3 is further arranged on the rear optical axis. . The magnification of the microscope is changed by moving the reflecting mirror 2 in and out of the optical axis. Since the magnification is proportional to the optical path length, assuming that the magnification when the reflecting mirror 2 is on the optical axis is 1, the magnification when the reflecting mirror 2 is removed from the optical axis is the ratio of the optical path lengths of both (L ₁ + L ₂ + H ₁ + H ₂ + H ₃ ) / (L ₁ + L ₂ ) times. According to this microscope, the magnification can be changed by a simple operation of putting the reflecting mirror in and out on the optical axis, and the operation is very simple. In the above embodiment, the magnification is two, but the magnification can be variously changed by increasing the number of reflecting mirrors. It is also possible to use a prism instead of the reflecting mirror.

[0008]

【effect】

 As described above, according to the optical fiber fusion splicing device with a microscope of the present invention, a large number of optical fibers of a multi-core optical fiber can be fusion-spliced quickly and accurately, and a remarkable industrial effect is achieved. ..

[Brief description of drawings]

FIG. 1 is a principle view showing an embodiment of a magnification changing mechanism of a microscope used in the optical fiber fusion splicing apparatus of the present invention.

FIG. 2 is an explanatory view of an optical fiber fusion splicing device with a microscope.

[Explanation of symbols]

 1 Objective Lens 2 Reflecting Mirror 3 Reflecting Mirror Group 4 Imaging Surface 5 Fixed Stand 6 Optical Fiber 7 Moving Stage 8 Optical Fiber Butting Section 9 Discharge Electrode 10 Microscope

Claims (2)

[Scope of utility model registration request] 1. An optical fiber fusion splicing apparatus with a microscope, wherein the microscope has a variable magnification. 2. The optical fiber fusion splicing apparatus with a microscope according to claim 1, wherein the magnification of the microscope is made variable by changing the optical path length from the objective lens of the microscope to the image pickup surface.