Article | REF: AF3345 V1

Holographic interferometry - Principles

Author: Paul SMIGIELSKI

Publication date: October 10, 1998

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2. Double-exposure holographic interferometry

2.1 Physical aspects

The technique employed is similar to that used to produce a conventional hologram (simple exposure). Let's assume we've made the holography setup shown in figure 1 a. A first exposure is made, with the pressure inside the thruster being p 1 (state 1). The internal pressure is then raised from p 1 to p 2 , without touching anything else. A second pose is then carried out to register the thruster in state 2 (pressure p 2 ).

After photographic...

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Double-exposure holographic interferometry