日本三丰粗糙度仪，对工作部位粗糙度进行检测，达到积康出厂标准，光学产品粗糙度，我们已经达到RA：0.07μm，恒定的品质，是产品生产稳定的重要因素

Japanese Mitoyo roughmeter, test the roughness to achieve Gillkon standard. We already achieve to make the products roughness to be RA：0.07μm, stable qualtiy is important factor for products.