A Measuring Device for Large Size Optical Fiber Preform

Abstract

The invention relates to a measuring device for a large-sized optical fiber preform. The measuring device includes a light-transmitting container and matching oil, and a scanning laser light source isarranged on the outer side of the light-transmitting container and connected with a horizontal displacement device. A photoelectric position sensor is installed on the other side of the light-transmitting container corresponding to the scanning laser light source. The measuring device is characterized in that the photoelectric position sensor includes a polyhedral cylinder capable of rotating around the horizontal axis, photoelectric position sensing devices are mounted on at least two cylindrical surfaces of the polyhedral cylinder, one photoelectric position sensing device is mounted on each cylindrical surface, all the photoelectric position sensing devices are connected and arranged in a front-rear mode in the axial direction, and the photoelectric position sensing devices mounted onthe adjacent cylindrical surfaces are connected in a front-rear mode. The measuring device is reasonable, simple and convenient in structural arrangement and not only is large in measuring diameter, but also is low in manufacturing cost, and a function of adopting the small-sized photoelectric position sensing devices to measure geometric parameters, such as a refractive index profile and core andcladding diameter, of the optical fiber preform with a larger diameter is achieved.

Description

technical field [0001] The invention relates to a measuring device for a large-size optical fiber preform, which is a device for measuring the refractive index profile of the optical fiber preform and geometric parameters such as core and cladding diameters, and belongs to the technical field of optical fiber detection devices. Background technique [0002] Optical fiber is the main carrier of modern data communication. From the perspective of cost and production efficiency, the optical fiber preparation industry tends to prepare optical fiber preforms with larger diameters. The measurement of optical fiber preform refractive index profile and geometric parameters such as core and cladding diameter is an important quality control link. At present, this kind of measurement is mainly based on optical non-contact measurement, which will use photoelectric position sensors. The working principle of the photoelectric position sensor is to output the position coordinates of the in...

AI Technical Summary

Problems solved by technology

However, due to the semiconductor process, large-sized photosensitive position sensing elements are usually more expensive, which will greatly increase the cost of measuring devices for large-sized optical fiber preforms

And in the sensing edge area (1 / 4~1 / 6 on both sides of the effective length of the detector), due to the aberration of the optical system and the influence of circuit noise, the detector will have problems such as increased position error and degradation of output linearity

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