Compact holographic camera based on photorefractive crystals and applications in interferometry

We report the achievement of a compact and portable holographic interferometer. A first prototype had been previously developed. It showed some limitations that are now overcome. The new camera is lighter, more easy to handle and is more flexible, mainly by means of an optical fiber bringing the light from a remote laser to the holographic head and a new optical design that strongly reduces the reference beam forming stage. This instrument can be used for high accuracy displacement metrology. Several recent examples are reported here for the first time. They all concern industrial R&D studies.