JPS592006A - Method for manufacturing optical fiber bundle - Google Patents

Abstract

PURPOSE:To obtain efficiently optical fiber bundles which are arranged at a prescribed pitch by forming a magnetic material film on the outside circumferential surface at the forward end of each optical fiber, and sucking the forward ends of the optical fibers into a base plate which is disposed with guide spots magnetized in the direction reverse from the film at a specified pitch. CONSTITUTION:A magnetic material film 2 is formed on the outside circumferential surface at the forward end of an optical fiber 1 at about 1-10mu film thickness by dipping the forward end of the fiber 1 into a soln. of a polymer material dispersed therein with, for example, magnetic material powder, then pulling, drying and curing the same. The fibers 1 are arranged at a prescribed pitch by utilizing the inter-magnetic attraction force between the films 2 and a base plate 3 provided with guide spots 4 magnetized in the direction reverse from the film 2 in, for example, a matrix shape. The easy insertion of the fibers 1 to a perforated grid 5 at a specified pitch is made possible by the above-mentioned method. The bundles for optical image transmission having a high resolution, etc. are thus obtd. at pitch intervals with high accuracy and good productivity.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing an optical fiber bundle using magnetic force. In particular, the present invention relates to a method of manufacturing an optical fiber condenser used in a fiber optic image transmission device.

Conventional fiber optic optical image transmission devices are constructed by incorporating a large number of light transmitting fibers, each optical fiber comprising a core of a relatively high refractive index light transmitting material and a relatively low refractive index cladding. .

Light incident from one end of a large number of optical fiber bundles is received by the core of each fiber constituting the bundle, and is repeatedly reflected and transmitted through the optical fibers according to the principle of total internal reflection. The original optical image is reproduced on the opposite end face of the optical fiber.

Due to the difference in the correspondence between the set arrangement of optical fibers at the end face on the input side of the original image and the set arrangement state of the optical fibers at the end face on the output side, the fiber set optical image transmission device
It is classified into image transmission type, line/matrix type, line/circle type, etc.

In order to improve performance such as resolution in such a 7-eyeper optical image transmission device, it is essential to improve the degree of arrangement of each fiber in the assembled state of the 7-eyepers, that is, the accuracy of the pinch property. The function of is determined. Particularly in the image transmission type or line matrix type, the pitch of the matrix arrangement of the constituent fibers is an extremely important point.

Conventionally, the common method for manufacturing such a fiber-integrated optical image transmission device is to arrange optical fibers side-by-side and laminate hindlimb optical fiber sheets formed into sheets. When optical and optical fibers are arranged side-by-side to form an aggregate, it is of course impossible to expect constant pitch properties that are greater than the diameter unevenness of the optical fibers. There is a busy limit.

Normally, when optical fiber sheets are laminated, the state is close to the close-packed state, so-called bale stacking, and the actual situation is that the pitch property is unavoidable.

In addition, as a manufacturing method that emphasizes high-precision pitch, there is a method in which optical fibers are inserted one by one into the openings of a fixed-pitch grid that has been pre-drilled with high precision, but this method focuses on pitch performance and has low productivity. It is difficult to mass produce.

The inventors have arrived at the present invention as a result of intensive research aimed at improving the above-mentioned drawbacks and producing optical fiber bundles arranged at regular intervals with good productivity. In other words, the gist is that a magnetic film is attached to the outer periphery of the tip of the optical fiber,
A method for producing an optical fiber bundle, characterized in that the tips of the optical fibers are attracted to a guide body magnetized in the opposite direction to the magnetic film using attraction between the magnetic bodies, and the optical fibers are arranged at a predetermined pitch. be.

The present invention will be described in detail below with reference to the drawings.

FIG. 1 is a perspective view of the tip of an optical fiber equipped with a magnetic film.

A magnetic film (2) is attached to the tip of the optical fiber (1). The material of the magnetic body is not particularly limited, but for example, N
An i-Co based magnetic material is used. The thickness of the magnetic film (2) used is 1 to 10 μm, preferably about 5 μm. The method for forming the magnetic film is not particularly limited, but for example, magnetic powder is mixed with a solution or melt of a polymer material, and the end of the optical fiber (1) is added to the hindlimb liquid. A magnetic film (2) can be formed on the tip using the immersion button.

FIG. 2 is a diagram showing a specific example of a magnetic guide, in which a magnetic guide spot (4) is arranged on a substrate (3). Figure 2-1 shows a guide spot magnetized in the opposite direction (
4) is a magnetic material guide arranged precisely on the substrate (3) in a matrix shape with a pitch t, and in Fig. 2-2, the guide spots (4) are arranged in a line shape, and each guide spot (4) shows magnetic guides arranged accurately at a constant pitch m. 2-3 shows a magnetic guide formed in the form of a strip, which allows the side surfaces of optical fibers to be connected by force between the magnetic materials.

The arrangement of these magnetized magnets in opposite directions must be selected depending on the purpose for which they are arranged.

FIG. 3 is a drawing showing a specific example of the method for manufacturing an optical fiber bundle using the force between magnetic bodies according to the present invention.

By using the force between the magnetic bodies, it becomes possible to easily insert the optical fiber (1) into the porous grid (5) with a fixed pinch.

[Brief explanation of drawings]

Figure 1 is a perspective view of the tip of an optical fiber equipped with a magnetic film, and Figure 2 is a diagram showing a specific example of a magnetic guide.
-Figure 1 shows the guide spot.) IJ rack type,
Fig. 2-2 shows an example of a 2-in-shaped one, Fig. 2-3 shows a strip-shaped one, and Fig. 3 shows a concrete example of the method for manufacturing an optical fiber bundle using the force between magnetic bodies according to the present invention. It is a drawing showing an example. In the drawings, reference numeral (1) indicates an optical fiber, (2) a magnetic film, (3) a substrate, and (4) a guide spot. Patent applicant Mitsubishi Rayon Co., Ltd.

Claims (1)

[Claims] A magnetic film is attached to the outer peripheral surface of the tip of the optical fiber, and the tip of the optical 7 eyeper is attracted to a guide body magnetized in the opposite direction to the magnetic film using the attraction between the magnetic bodies, thereby aligning the optical fiber with a predetermined pitch. 1. A method for producing an optical fiber condenser, which comprises arranging optical fibers.