scholarly journals Near-field amplitude and phase recovery using phase-shifting interferometry

2008 ◽  
Vol 16 (2) ◽  
pp. 494 ◽  
Author(s):  
B. Deutsch ◽  
R. Hillenbrand ◽  
L. Novotny
Keyword(s):  
Near Field ◽  
Field Amplitude ◽  
Phase Shifting ◽  
Phase Recovery ◽  
Phase Shifting Interferometry

scholarly journals Experimental visualization of aerodynamic sound sources using parallel phase-shifting interferometry

2020 ◽  
Vol 61 (9) ◽  
Author(s):  
Risako Tanigawa ◽  
Kohei Yatabe ◽  
Yasuhiro Oikawa
Keyword(s):  
Optical Method ◽  
High Speed ◽  
Near Field ◽  
Phase Shifting ◽  
Flat Plates ◽  
Noise Sources ◽  
Sound Sources ◽  
Aerodynamic Sound ◽  
Phase Shifting Interferometry ◽  
Pressure Fields

Abstract Aerodynamic sound is one of the causes of noise in high-speed trains, automobiles, and wind turbines. To investigate the characteristics of aerodynamic sound generation, measurements around the sound sources are required. Aerodynamic sound is typically measured using microphones. However, microphones cannot capture the near-field of aerodynamic sound because they become new noise sources inside the air flow. To observe the aerodynamic sound near-field, we performed two-dimensional visualization of aerodynamic sound using an optical method. The optical method used in this research, parallel phase-shifting interferometry (PPSI), can detect the pressure within the measurement area as variations of the phase of light. PPSI can therefore visualize the pressure fields. We visualized both the sound pressure and flow components of the sound generated by flow around a square cylinder and flat plates. The visualized pressure fields are provided as animations in the online resources. Analysis of the sound and flow component time variations confirmed the correlations between them. Graphic abstract

Phase-shifting interferometry with uncalibrated phase shifts

2000 ◽  
Vol 39 (4) ◽  
pp. 585 ◽  
Author(s):  
Xin Chen ◽  
Maureen Gramaglia ◽  
John A. Yeazell
Keyword(s):  
Phase Shifts ◽  
Phase Shifting ◽  
Phase Shifting Interferometry

scholarly journals Atmospheric turbulence compensation with laser phase shifting interferometry

2006 ◽  
Vol 450 (1) ◽  
pp. 415-425 ◽  
Author(s):  
S. Rabien ◽  
F. Eisenhauer ◽  
R. Genzel ◽  
R. I. Davies ◽  
T. Ott
Keyword(s):  
Atmospheric Turbulence ◽  
Phase Shifting ◽  
Phase Shifting Interferometry
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