Aero-Optic Measurements Using a Laser-Induced Air Breakdown Beacon (PrePrint)
Abstract
An experimental investigation into the optical behavior of a laser-induced air breakdown spark is described. The investigation concentrates on qualities of the air-breakdown spark, particularly the non-point-source character of the spark, that have a critical influence on the accuracy with which aero-optic aberration can be measured using the return light from the spark. Data are presented that show that the spark dimensions conform to established physical models, and baseline spark wavefront noise figures are presented as a function of the optical system parameters. Wavefront measurements are shown that indicate that a well-designed beacon system should be capable of accurately measuring aero-optic aberration created by realistic compressible shear-layer flows.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 04, 2009
- Accession Number
- ADA501134
Entities
People
- David Cavalieri
- David Goorseky
- Eric J. Jumper
- Garnett Cross
- Matthew Whiteley
- R. Rennie