Sub-micrometric profilometry of non-rotationally symmetrical surfaces using the Ronchi test

摘要

The Ronchi test is a widely used tool in the optical shop, because of its capability of measuring wide-field profiles of optical quality surfaces through its important ray slope dynamic range. Although many applications have been reported (intraocular lenses, capillary flow measurements, etc.), they are usually limited to obtaining profiles of rotationally symmetrical surfaces, either spherical or aspherical. An easy to set-up Ronchi test technique based in geometrical optics principles has been developed at the CD6, which allows accurate and repetitive wavefront measurements of the topography of both rotaionally and non-rotationally symmetrical optical quality surfaces.