The purpose of optical coatings is to change the reflectivity of optical surfaces. According to the materials and physical phenomena which are used one can in principle distinguish metallic and ...

Drawing upon its uniquely stable manufacturing environment - Optical Surfaces Ltd. routinely produces the highest quality concave spherical mirrors for Schlieren Imaging systems in a range of ...

Since the publication of Hockney's provocative thesis, several objections have been raised. For example, it has been claimed that Hockney's projection technique would have required a mirror of very ...