Measuring equipment and measuring method for eccentricity ratios of large-diameter preform

Abstract

The invention discloses measuring equipment and a measuring method for eccentricity ratios of a large-diameter preform, belongs to the field of manufacture of optical fiber preforms, and relates to equipment and methods for measuring eccentricity ratios of preforms by mirror reflection measurement. The measuring equipment comprises a measuring table, a sliding table, a measuring table back plate, a detected data display screen, a data output display screen, a laser transmitting and receiving instrument support, an adjusting knob, a laser transmitting and receiving instrument, a rear linear guide rail, a left fixed roller bracket, a left support roller, a front linear guide rail, a graduated scale, a rotating motor, a moving bracket, a preform supporting rotating roller, a right fixed roller bracket, a right support roller, a left-right moving motor and a left-right moving lead screw. The measuring method includes steps of placing the preform on the left support roller and the right support roller on the left fixed roller bracket and the right fixed roller bracket, testing the surface of a body of the preform by the laser transmitting and receiving instrument in real time, recording data, collecting data of eccentricity ratios of various circumferential points around a first measuring point, computing an eccentricity ratio of the first measuring point by an eccentricity ratio computational formula; and measuring eccentricity ratio of a second measuring point.

Description

technical field [0001] The invention relates to a device for measuring the eccentricity of a large-diameter preformed rod and a measuring method thereof, belonging to the field of optical fiber preformed rod manufacturing, and relates to a device and a method for measuring the eccentricity of a preformed rod by using mirror reflection. Background technique [0002] At present, the optical fiber preforms produced by general preform companies are two layers of glass with different refractive indices. The eccentricity of the core glass relative to the outer cladding directly affects the product quality. During the production process of the preform, it is necessary to accurately measure the eccentricity to judge whether the product is qualified. , which is a key indicator of the preform. [0003] The preform eccentricity of the prefabricated rod is mainly detected by the measuring instrument in the early stage, and the refractive index of the intermediate medium oil is measured ...

AI Technical Summary

Problems solved by technology

However, this method has its own defects. As the diameter of the preform becomes thicker, the weight also increases. The clamping and bearing of the existing measuring equipment, the size and capacity of the oil storage tank, and the aspects of the laser cannot meet the requirements. , the current measuring equipment on the market has not been able to measure the eccentricity of large-diameter (diameter ≥ 10mm) preforms

[0004] The defects of the measuring instruments in the early stage include: 1) Different tooling is required for rods of different specifications, and the adaptability to product changes is poor, which cannot meet the measurement of multiple specifications at the same time; 2) The measuring instruments in the early stage adopt the principle of refraction index, Light needs to pass through the entire rod, which has high requirements on the laser and cannot meet the measurement accuracy requirements after the rod diameter becomes thicker

Images