Study on the application of optical interferometry in the measurement of the coating thickness of color-coated plates  

作　　者：ZHANG Xiaota FAN Chun REN Yuling 

机构地区：[1]Products&Technique Management Department,Baoshan Iron&Steel Co.,Ltd.,Shanghai 201999,China [2]Cold Rolling Mill,Baoshan Iron&Steel Co.,Ltd.,Shanghai 201900,China

出　　处：《Baosteel Technical Research》2024年第3期39-47,共9页宝钢技术研究（英文版）

摘　　要：The principle and application of optical interferometry to measure the coating thickness of color-coated plates were introduced in this paper.Additionally,several factors affecting the test results,including coating refractive index,wavelength range,and film thickness range setting,were analyzed.Among these,the refractive index of the color coating,which cannot be measured directly,was identified as the key factor.A solution to this problem was proposed.Finally,the optical interference method and the current detection methods,including the micrometer method and the magnetic eddy current method,were analyzed and compared.The results show that optical interferometry has better repeatability and reproducibility than the current methods and show no significant difference from the current methods through statistical tests.Therefore,the method can be applied to the detection of the coating thickness of color-coated plates.

关 键 词：optical interferometry color-coated plates coating thickness 

分 类 号：TG806[金属学及工艺—公差测量技术]