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Fiber preform rod flexibility measurement method

An optical fiber preform and measurement method technology, applied in the direction of measurement devices, optical devices, instruments, etc., can solve problems such as large amount of data and complex data processing, achieve scientific and reasonable data, improve precision and accuracy, and realize automatic measurement. Effect

Inactive Publication Date: 2017-05-31
JIANGSU AOWEIXIN HENGTONG OPTICAL TECH
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Problems solved by technology

This method not only requires multiple scans, multiple measurements, multiple fittings, and multiple judgments, but also requires more data to be collected, and the data processing is more complicated. The accuracy of the measurement results is directly related to the number of measurements; and the method uses Fitting the curve in the form of cross-section points has a certain fitting error

Method used

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  • Fiber preform rod flexibility measurement method

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Embodiment

[0032] This embodiment is a method for measuring the curvature of an optical fiber preform, which includes the following steps:

[0033] 1) Set the number of measurement sections and the section selection mode;

[0034] 2) Clamp and position the optical fiber preform;

[0035] 3) Data acquisition: keep the optical fiber preform in a rotating state, position the first selected section with the laser caliper 9, scan the section 360°, and then move the laser caliper 9 to the next section. A section position, repeat this step until all sections are scanned;

[0036] 4) Data processing: each time the laser caliper 9 scans, a group of dynamic distances between the dynamic surface of the section and the reference surface is collected as D, and the maximum value of the dynamic distances obtained by comparison is Dmax and the minimum value is Dmin, the calculated difference between the maximum value Dmax and the minimum value Dmin is ΔD, and ΔD / 2 is the curvature of the section, and ...

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Abstract

The invention discloses a fiber preform rod flexibility measurement method. The method comprises steps that 1), initial setting is carried out; 2), a to-be-measured rod is clamped and positioned; 3), the to-be-measured rod is kept to rotate continuously, a laser diameter measurement instrument is utilized to carry out 360-DEG all-round scanning for a first selected cross section, the laser diameter measurement instrument is moved to a next cross section, and the step is repeated till all the cross sections are scanned; 4), a set of dynamic distances between a dynamic cross section surface and a reference surface is acquired each time when scanning is carried out by the laser diameter measurement instrument, difference of the largest value and the smallest value of the set of distances is calculated, and one half of the difference is flexibility of the cross section; 5), two-dimensional curve fitting is carried out for flexibility of all the cross sections, namely a flexibility curve is acquired; and 6), the largest flexibility of all the cross sections is taken as flexibility of the to-be-measured rod. The method is advantaged in that one-time automatic measurement on rod flexibility is realized through employing a scanning and rotation mode, high measurement precision is realized, analysis data can be automatically generated, and measurement efficiency is high.

Description

[0001] 【Technical field】 [0002] The invention belongs to the technical field of bending degree measurement, in particular to a method for measuring the bending degree of an optical fiber preform rod. [0003] 【Background technique】 [0004] The existing production process needs to check the bending degree of the optical fiber preform during the production process to realize the quality control of the product. This process is realized through manual measurement. Different measurement tools and different measurement methods lead to measurement The result has a large deviation. [0005] The prior art patent number is CN201510177276.1, which discloses a bar bending degree measuring instrument, which uses a digital display dial indicator to be set on the vernier caliper, and the digital display dial indicator slides on the vernier caliper and the bar to realize the measurement of the bar bending. The measurement of bending degree, but this scheme requires manual operation by the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/24
CPCG01B11/24
Inventor 骆金卫沈国锋
Owner JIANGSU AOWEIXIN HENGTONG OPTICAL TECH
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