Holographic Interferometry

5

Mach–Zehnder Shearing Optical Holographic Interferometry with Regulated Sensitivity

5.1  Applications of Mach–Zehnder Shearing Holographic Interferometry in Aerospace Engineering Research

All interferograms which will be discussed in this section have been reconstructed from Mach–Zehnder holograms, which were recorded by using the interferometer imaged in Figure 4.1.

5.1.1  Turbulent Heated Air Jet from Heat Gun

The subsonic turbulent heated air jet generated by a heat gun is one of the interesting phase objects for studying temperature turbulence.⁶⁴ Figure 5.1(a,c) represents a series of interferograms reconstructed from Mach–Zehnder holograms with the shears varied from 0.1 to 0.3 mm. All holograms were recorded by using a continuous ...