HIGH-SPEED TIME-RESOLVED HOLOGRAPHIC INTERFEROMETER USING SOLID-STATE SHUTTERS

A solid state, time-resolved holographic interferometric system has been developed. The time-dependent object beam from a strobed sequence of events impinges on a fixed area of film from a single direction, whereas the reference beam is subdivided into several branches which illuminate the film from different angles and are individually shuttered by electro-optical light valves. The reference exposure is recorded simultaneously on all images by keeping all shutters open during one pulse of the laser. For the remaining pulses the shutters are sequenced. A three-image prototype has been implemented, and has been used to record interferometric sequences of a shock wave reflecting off a model, at intervals down to 100 μs. © 1990.