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随着生产的发展,对金属细丝、钟表游丝以及光导纤维直径进行高精度非接触动态测量的要求越来越迫切。目前,对于0.1毫米以下的细丝直径,一般采用电子测微仪或普通光学量仪作静态测量。但由于测量力或衍射效应的存在,测量误差将随着被测细丝直径的减小而增大。我们利用激光优越的相干性和光学的衍射原理,初步研制成了激光细丝直径动态测量仪。仪器可对0.1毫米以下金属细丝直径作非接触动态测量,误差在1％以内,并在漆包线的实际生产过程中进行了实验运用,获得良好效果。
With the development of production, the requirements for high-precision non-contact dynamic measurement of metal filament, hairspring and optical fiber diameter are becoming more and more urgent. At present, for the diameter of the filament below 0.1 mm, the general use of electronic micrometer or ordinary optical instrument for static measurement. However, due to the measurement force or diffraction effect, the measurement error will increase with the decrease of the measured filament diameter. We use laser superior coherence and optical diffraction principle, initially developed into a laser filament diameter dynamic measuring instrument. The instrument can make non-contact dynamic measurement on the diameter of metal wire below 0.1mm with the error less than 1%. The experiment has been carried out in the actual production process of the enameled wire, and the good result is obtained.