Effective Target Speed-Reduction Techniques for Industrial Interferometers

In recent years the cost, size and complexity of use of interferometers have reduced to an extent where they are now more employable in industrial applications, where their high precision and contactless measurement benefits are needed. A limitation in many industrial interferometers, however, is the maximum target speed that can be tracked without loss of information. In this paper optical setups are proposed, analysed and compared. They allow the effective target speed seen by the interferometer to be reduced thereby extending their range of use.