A Method of Forming Optical Diffusers of Simple Known Statistical Properties

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Abstract
A method is described by which optical diffusing surfaces may be formed using photoresist materials. These surfaces have a surface profile which is smoothly modulated and thus amenable to theoretical modelling. The distribution of surface heights in the surfaces has been determined using an interferometric method. Typical results are given, together with comparisons with both the expected (gamma function) and desired (gaussian) forms of distribution.