特集： 摩擦界面のその場観察技術の進展
光干渉による潤滑膜厚計測
2017 年 38 巻 3 号 p. 111-116
詳細
2017 年 38 巻 3 号 p. 111-116
Optical interference is one of the most powerful tools for lubrication studies, since it enables in-situ measurements of lubricant film thickness under practical conditions. After various improvements, optical interferometry has been developed to apply not only to thick (e.g., micrometer-scale) films in hydrodynamic lubrication regime but also to thin (e.g., nanometer-scale) films in boundary lubrication regime. This paper reviews the principles of measuring lubricant film thickness by optical interferometry and some technical tips on methods using white-light spectroscopy.
