随着我国机械制造工业的飞跃发展,对孔径的测量要求越来越高。由中国计量标准仪器厂设计和制造的701型孔径测量仪为高精度地测量孔径创造了条件。这种仪器是将孔径与量块阶梯进行比较,采用了光波干涉原理来进行测量的,因而测量精度高(极限误差不大干0.5微米)。此外,测量范围也较大(自1毫米至50毫米)。 With the rapid development of China’s machinery manufacturing industry, the aperture measurement requirements are getting higher and higher. The Model 701 aperture gauge, designed and manufactured by China Metrology Standard Instrument Factory, creates the conditions for high-precision aperture measurements. This instrument is the aperture and the block ladder to compare the use of light wave interference principle to measure, and therefore high accuracy (limit error is not large dry 0.5 microns). In addition, the measurement range is also large (from 1 mm to 50 mm).