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I am looking for a database of dielectric constants in the visible range and I could not find them by Googling, so I was wondering whether anybody here knows where I can find those parameters for some common materials (water, several oils, gold and so on) and several wavelengths in the visible range?

Qmechanic
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Xin Wang
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    http://www.engineeringtoolbox.com/relative-permittivity-d_1660.html This has several oils, and comes on the first page of Google search. – udiboy1209 Aug 22 '13 at 16:42
  • For glass, see Kitamura, http://www.seas.ucla.edu/~pilon/Publications/AO2007-1.pdf‎ . Related: http://physics.stackexchange.com/q/65812/ –  Aug 24 '13 at 00:13

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A good database with several materials could be found here RefractiveIndex.INFO .

It could be accesed online for download in different formats.