Abstract

In this paper, we present an application of microlens-based Hartmann wavefront sensors. The wavefront sensors, which employ arrays of one-dimensional cylindrical microlenses, are used in a multiview optical tomography system to provide a nonintrusive measurement of a dynamic heated air jet flow. A number of linear Hartmann sensors is arranged around the circumference of the region of interest (Figure 1). The tomography system uses the multiple simultaneous wavefront measurements around the circular jet to reconstruct two-dimensional estimates of the index-of-refraction variations in the flow. High speed sampling of the flow enables reconstruction of three-dimensional organized structures present in the flow.

© 1996 Optical Society of America