Abstract
The optical film thickness, expressed as the product of the refractive index and the absolute film thickness, is often considered as a single parameter in optical elastohydrodynamic lubrication (EHL) studies. A theoretical study of the effect of refractive index upon the interference intensity has been carried out, providing a method for the evaluation of refractive index irrespective of the absolute film thickness. As a result, a simple and reliable method for measuring the refractive index of an oil in an optical EHL contact has been developed. The technique is applied to a highly pressurized liquid lubricant trapped inside an EHL dimple and its high pressure refractive index is determined. © 2002 Elsevier Science Ltd. All rights reserved.
| Original language | English |
|---|---|
| Pages (from-to) | 497-504 |
| Journal | Tribology International |
| Volume | 36 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - Jul 2003 |
Research Keywords
- Density
- Liquid lubricant
- Optical interferometry
- Refractive index
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