Some Practical Uses of Laser Beam Photography in Engineering

Abstract

Some applications of laser beams are discussed which take advantage of both the coherence properties and the intense collimated beam. The beam forms an excellent pointer and, combining coherence, enables interferometry to be carried out under difficult circumstances. Full advantage of laser coherence is taken in holography enabling rapid visualisation of surface strain and vibration. In these laser applications, the information is recorded photographically. Common emui- sions will record a laser beam track, but holograms are coded recordings on high resolution emulsions, to construct a three dimensional image in space.

Notes

paper presented at a confernece on “Phologrnphy in Engineering” organized iointly by The Royal Photographic Society of Great Britain and the Institution of Mechanical