Development of an orthogonal-axes holographic flow measurements system for aero-optics applications

Joe E. O'Hare; Chris M. Bird; Joel H. Mansfield; A. George Havener

doi:10.1117/12.163735

2 December 1993 Development of an orthogonal-axes holographic flow measurement system for aero-optics applications

Joe E. O'Hare, Chris M. Bird, Joel H. Mansfield, A. George Havener

Proceedings Volume 2005, Optical Diagnostics in Fluid and Thermal Flow; (1993) https://doi.org/10.1117/12.163735
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

Abstract

An orthogonal axes holographic flow measurement system was developed and applied to support fundamental aero-optics (A/O) testing of free shear layer flows. The two optical axes are mutually orthogonal to the mean flow vector of the flow facility. The horizontal path which was normal to the shear layer was used to observe aero-optics effects. The vertical path which was parallel to the shear layer provided visualization of the flow structure. Focal plane imaging was also obtained from the A/O path to measure aberrations. A pulsed-laser light source provided instantaneous images for both orthogonal paths, including the focal plane image. This allowed the optical distortions normal to the shear layer to be correlated directly with specific flow structures and the variance from diffraction limited performance at the focal plane. This paper describes the design features of the holographic optical system and presents some of the preliminary results to demonstrate performance.

Citation Download Citation

Joe E. O'Hare, Chris M. Bird, Joel H. Mansfield, and A. George Havener "Development of an orthogonal-axes holographic flow measurement system for aero-optics applications", Proc. SPIE 2005, Optical Diagnostics in Fluid and Thermal Flow, (2 December 1993); https://doi.org/10.1117/12.163735

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