| http://www.w3.org/ns/prov#value | - Other materials which may be used include water (index 1.33), magnesium fluoride (index 1.38) or other common optical thin film materials which can be deposited using evaporation, sputtering, or various chemical vapor deposition processes, optical oils, liquid hydrocarbons such as naptha, toluene, etc. or other materials with suitably low indices.
|
