Due to their stable design, Fizeau interferometers are used to determine the topography of surfaces such as, e.g., plane surfaces. PTB (Physikalisch-Technische Bundesanstalt, Germany) has now ...

In order to push the performance of optical systems, aspheric- and freeform surfaces are used in state-of-the-art optic design for correcting aberrations. The production of these complex-shaped ...

IN determining the velocity of light by Fizeau's toothed wheel, the number of eclipses per second cannot be made more than about half a megacycle. Thus the method requires great distances. In two ...

Due to their stable design, Fizeau interferometers are used to determine the topography of surfaces such as, e.g., plane surfaces. PTB has now developed a method which makes it possible to analyze ...