JPH0511043U - Optical fiber inspection device - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] To inspect an optical fiber using a microscope by continuously moving the optical fiber. [Configuration] In an optical fiber inspection device that sets the optical fiber at the focal point of the microscope and inspects it from the lateral direction,
A transparent member 6 for linearly mounting the optical fiber 1 is provided,
A mechanism for moving the optical fiber 1 linearly and continuously in the axial direction is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an optical fiber inspection device for continuously inspecting a long optical fiber.

[0002]

[Prior Art]

 What kind of effect the interface between the clad and core of the optical fiber has on light, that is, when inspecting for the presence or absence of an irregular portion with respect to light, it was fixed on the fine movement table of the microscope. Therefore, the maximum distance that the optical fiber can be moved is the movable distance of the fine moving table, and when inspecting a long optical fiber, the optical fiber is repeatedly fixed to the fine moving table. It was

[0003]

[Problems to be solved by the device]

 Due to the above-described means, it takes a lot of labor and time to inspect a long optical fiber. Further, the fixation of the optical fiber to the fine movement table becomes discontinuous in the longitudinal direction of the optical fiber, and there is a problem that the reliability of the inspection result is low. An object of the present invention is to continuously inspect a long optical fiber, reduce the time and labor required for the inspection, and obtain a highly reliable inspection result.

[0004]

[Means for Solving the Problems]

 In the optical fiber inspection device, a transparent member for placing the optical fiber on a straight line is provided, the focus of the microscope is arranged on the linear optical fiber, and the optical fiber placed on the transparent member is axially linear. It is provided with a mechanism that moves in a continuous manner.

[0005]

[Action]

 The optical fiber inspection apparatus of the present invention is provided with a mechanism for continuously moving the optical fiber at the focal point of the microscope in a straight line in the axial direction, so that the optical fiber can be continuously inspected and a long optical fiber can be inspected. The inspection time and labor can be greatly reduced.

[0006]

【Example】

 FIG. 1 is a block diagram of an embodiment of an optical fiber inspection apparatus (hereinafter referred to as an inspection apparatus) of the present invention. In the figure, 1 is an optical fiber, 2, 3 and 4 are guide pulleys, 5 is an optical fiber winding capstan, 6 is a transparent glass optical fiber support, 7 is an oil bath, 8 is matching oil, and 9 is a microscope. Reference numeral 10 is an eyepiece lens, 11 is a television camera, 12 is a reflecting mirror, 13 is a condenser lens, and 14 is an illumination lamp.

The configuration of the inspection device of the present invention will be described. The optical fiber 1 of the present invention is guided in the order of the guide pulleys 2 and 3, the optical fiber support 6 and the guide roller 4 which are arranged in series, and is wound on the optical fiber winding capstan 5. The optical fiber support 6 is provided with a linear groove 15 having the same width and depth as the outer diameter of the optical fiber 1, as shown in FIG. There is. The optical fiber 1 moves along the groove 15 toward the guide pulleys 2, 3, the optical fiber support 6, and the guide pulley 4. The moving speed is determined by the winding speed of the optical fiber winding capstan 5.

The optical fiber 1 is immersed in matching oil between the guide pulley 3, the optical fiber support 6 and the guide pulley 4 as shown in the figure. The optical fiber 1 in the groove 15 of the optical fiber support 6 is illuminated from below by the optical system of the reflecting mirror 12, the condenser lens 13, and the illumination lamp 14. Observation is performed with the eyepiece lens 10, and the output of the television camera 11 is output to the monitor and recorded as necessary.

The operation of the inspection device of the present invention will be described. With the above configuration, the optical fiber 1 is wound by the optical fiber winding capstan 5 in the groove 15 with the optical fiber supporting base and continuously moves. At this time, since the optical fiber 1 is along the guide groove 15 of the optical fiber, it always exists in the focal plane of the microscope 9. Further, by manufacturing the optical fiber support base 6 provided with the optical fiber guide groove 15 with a transparent glass, it is possible to illuminate the optical fiber 1 from the lower side, so that a bright image can be obtained.

By adjusting the refractive index of the matching oil 8, the surface or the inside of the optical fiber 1 can be observed more clearly. That is, when it is desired to observe the inside of the optical fiber 1, the refractive index of the matching oil 8 is made to match the refractive index of the surface of the optical fiber 1. If you want to observe the surface, make a difference.

In the configuration of the inspection apparatus, the fiber guide groove 15 does not necessarily have to be a groove, and the optical fiber can be moved in the longitudinal direction without swaying left and right in the microscope focal plane. , The purpose is reached. Therefore, as shown in FIG. 3, which is a plane as shown in FIG. 3 and prevents the optical fiber from swinging, the guide protrusions 16 and 17 projecting upward only at the position where the optical fiber 1 is introduced and the position where the optical fiber 1 is led out. May be provided.

In this case, very high mechanical accuracy is required for guiding the optical fiber. However, the lighting effect from the bottom is better than in the case of grooves. In the case of a groove, the illumination effect is improved by illuminating from the bottom and the top. The length of the upper surface of the optical fiber support 6 in the moving direction depends on the focal length, but may be about 10 mm to 20 mm. Since the inspection apparatus of the present invention operates as described above, it becomes possible to continuously inspect the long optical fiber 1.

[0013]

[Effect of the device]

 As described above, in the inspection apparatus of the present invention, the optical fiber to be inspected continuously moves in the focal plane of the microscope, so that time and labor can be greatly reduced when inspecting a long optical fiber. .. Further, since continuous inspection results can be obtained in the longitudinal direction of a long optical fiber, there is an effect that the reliability of the optical fiber inspection can be increased.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of an inspection device of the present invention.

FIG. 2 is a view showing an optical fiber guide groove provided on an upper surface of an optical fiber support base of the present invention.

FIG. 3 is a view showing an optical fiber guide protrusion provided on an upper surface of an optical fiber support according to the present invention.

[Explanation of symbols]

 1 Optical Fiber 2 Guide Pulley 3 Guide Pulley 4 Guide Pulley 5 Optical Fiber Winding Capstan 6 Optical Fiber Support 7 Oil Bath 8 Matching Oil 9 Microscope 10 Eyepiece 11 TV Camera 12 Reflector 13 Focusing Lens 14 Lighting Lamp 15 optical fiber guide groove 16 optical fiber guide protrusion 17 optical fiber guide protrusion

Claims (1)

Claims for utility model registration: 1. In an optical fiber inspection apparatus for setting an optical fiber at a focal position of a microscope and inspecting it from the lateral direction, a transparent member for linearly mounting the optical fiber is provided, and An optical fiber inspecting device comprising a mechanism for continuously moving an optical fiber mounted on a transparent member linearly in the axial direction.