Patent ID: 7083881

Claim:
An article comprising a machine-readable medium storing instructions operable to cause one or more machines to perform operations comprising: receiving information indicative of one or more optical characteristics of a particular material; receiving information indicative of one or more optical characteristics of another material; receiving information indicative of a desired attenuation amount; receiving information indicative of a desired phase amount; and using the information indicative of the one or more optical characteristics of the particular material and the another material, the information indicative of the desired attenuation amount, and the information indicative of the desired phase amount for determining a first thickness of the particular material and a second thickness of the another material to attenuate light of a particular wavelength by the desired attenuation amount as the light is transmitted through the particular material and the another material in a forward direction and in a reflected direction, the first thickness of the particular material and the second thickness of the another material to shift a phase of the light by the desired phase amount as the light is transmitted through the particular material and the another material in the forward direction and in the reflected direction.