title: Parallel processing system for rapid analysis of speckle-photography and particle-image-velocimetry data.
abstract: An automated system has been constructed to process double-exposure speckle-photography and particle-image-velocimetry images. A 3 × 3 array of laser beams probes the photograph, forming nine fringe patterns in parallel; these are then analyzed sequentially by digital computer and the use of a two-dimensional Fourier-transform method. Results are presented showing that the random errors in the measured displacements from such a system approach the expected speckle-noise-limited performance, with a total analysis time per displacement vector of 160 ms.
authors.forename: J M
authors.initials: JM
authors.lastname: Huntley
authors.forename: H T
authors.initials: HT
authors.lastname: Goldrein
authors.forename: L R
authors.initials: LR
authors.lastname: Benckert