Optical fiber end face geometrical parameter measuring device and device based on annular LED illumination

Abstract

The invention discloses an optical fiber end face geometrical parameter measuring device based on annular LED illumination. The device comprises an adjusting frame, an optical fiber clamp, an LED light source, a microscopic system, a camera and a data acquisition and processing system. The adjusting frame is used for adjusting the position and the angle of the optical fiber clamp; the optical fiber clamp is used for clamping a measured optical fiber; the LED light source is of an annular structure, an oblique illumination mode is adopted, light emitted by the LED light source enters the microscopic system after being scattered by the measured optical fiber, and an optical fiber end face image is obtained by the camera. The data acquisition and processing system is used for processing the optical fiber end face image to obtain various geometric parameters of the optical fiber end face; and the optical fiber detection device can detect optical fibers with coating layers, is suitable fordetection of different optical fiber end face structures, and is simple and compact in overall structure and convenient and efficient in detection.

Description

technical field [0001] The disclosure relates to a device and method for measuring geometric parameters of an optical fiber end face based on ring LED lighting. Background technique [0002] At present, optical fibers have been widely used in the fields of communication and sensing, and optical fibers with new structures that meet specific application requirements have been developed continuously. The accurate measurement of their geometric parameters is of great significance for the manufacture and application of optical fibers. Therefore, in the optical fiber production process, there is an urgent need for a device that can adapt to different optical fiber end-face structures and automatically measure optical fiber geometric parameters. [0003] Most of the existing optical fiber end-face geometric parameter measurement devices use the grayscale imaging method, which couples the light emitted by the transmitted illumination light source into one end of the optical fiber un...

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Problems solved by technology

[0004] like figure 2 As shown, the optical path structure of the existing device is relatively complicated. During the test process, it is necessary to cut the two ends of the optical fiber under test with a length of about 2 m. The other end of the fiber under test adjusts the three-dimensional adjustment frame so that the end face of the fiber under test is clearly imaged in the center of the camera's field of view, and then the geometric parameter values ​​of the fiber under test are calculated by the data acquisition and processing system

The whole test operation process is cumbersome, and the biggest disadvantage is that while measuring the parameters related to the core and cladding, the parameters of the coating layer cannot be measured, because when using a conventional fiber cutter to cut the end face of the fiber, it is necessary to Optical Fiber Coating Stripping

If you want to measure the coating layer parameters of the optical fiber, you need to use a special fiber cleaver to cut the end face of the optical fiber with the coating layer, which virtually increases the test cost.

Moreover, all the geometric parameters of the fiber under test cannot be obtained in one test, and the test efficiency is low

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