  The ability to simulate atmospheric turbulence in the lab is a crucial part
of testing and developing astronomical adaptive optics technology. We report on
the development of a technique for creating phase plates, which involves the
strategic application of clear acrylic paint onto a transparent substrate.
Results of interferometric characterization of these plates is described and
compared to Kolmogorov statistics. The range of r0 (Fried's parameter) achieved
thus far is 0.2 - 1.2 mm, with a Kolmogorov power law. These phase plates have
been successfully used by the lab for Adaptive Optics at University of
California, Santa Cruz, in the Multi-Conjugate Adaptive Optics testbed, as part
of the Villages (Visible Light Laser Guidestar Experiments) calibration system,
and during integration and testing of the Gemini Planet Imager. This method has
proven to be an effective and low cost means to simulate turbulence. We are now
distributing the plates to other members of the AO community.
