Compact holographical device for testing of physico-chemical processes under microgravity conditions

A holographic camera is described which can be used to study a range of flow and transfer processes in microgravitational environments. Regina, the holographic camera, includes a photothermoplastic hologram recorder, camera, and a telemetric system, and operates with an He-Ne laser and optical scheme that permit real-time and double-exposure holographic interferometry. The optical scheme is described, and the Denisjuk method of reconstruction of white light is employed in the configuration. The applications tested for the Regina encompass examining dissolving crystal processes, conducting electrophoretic experiments, investigating free convection in a closed space, and nondestructive testing of artificial heart valves. The Regina system is an effective means for studying the refractive-index profile of an optical fiber, vibro-convection in liquids, and electrical-phenomenon physics.