Optical fiber product inner diameter go-no go gauge measurement method

Abstract

The invention discloses an optical fiber product internal diameter go-no go gauge measurement method. The method comprises the steps of 1, selecting two standard gauge blocks M1 and M2, grinding the two standard gauge blocks M1 and M2 together to form a standard length A1 combination, then selecting two standard gauge blocks M3 and M4 of the same specification, grinding the two standard gauge blocks M3 and M4 together to form a standard length A2 combination, and measuring the A2 combination to obtain an indicating value epsilon which is the height difference of the A1 and A2 combinations by taking the A1 combination as a zero position; 2, separating the A2 combination, placing an optical fiber product inner diameter go gauge or no-go gauge on the measuring face of the standard gauge blockM3, then placing the standard gauge block M4 on the go gauge or the no-go gauge, and forming a length A3 combination; And 3, simultaneously placing the combination A1 and the combination A3 on a micrometer workbench, measuring the combination A3 to obtain an indicating value phi by using the combination A1 to align to a zero position, and determining that the diameter D of the inner diameter go gauge or no-go gauge of the optical fiber product is phi + / -epsilon.

Description

technical field [0001] The invention relates to the technical field of precision measurement of geometric quantities, in particular to the detection field of go-no-go gauges (including go-no-go gauges and no-go gauges) of optical fiber product inner diameters. Background technique [0002] In the technical field of precision measurement of geometric quantities, there have always been great difficulties in the measurement of ultra-precise very small dimensions. For example, the measurement of the diameter of the inner diameter of optical fiber products is generally at the micron level, and the accuracy is controlled within 1 μm, which is a typical ultra-precision extremely small size. In order to ensure the accuracy and reliability of the measurement results, according to the measurement principle, the maximum allowable error of an instrument that meets the accuracy of 1 μm measurement should not be greater than 0.33 μm. The inner diameter go-no-go gauges of optical fiber pr...

AI Technical Summary

Problems solved by technology

[0006] The existing technology uses the "direct measurement method" to realize the diameter measurement of the inner diameter of the optical fiber product, and the measurement uncertainty of the evaluation result can be optimally up to U=0.30 μm, and the coverage factor k=2 (the coverage probability is about 95%). The biggest problem is that due to the limitation of the maximum allowable error of the instrument, it will be very difficult to increase the measurement uncertainty, thus limiting the measurement accuracy. For example, when the diameter of the go-no-go gauge for optical fiber products requires the accuracy to be controlled at 0.5 μm, the “direct measurement method" is difficult to apply

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