Abstract

Computed tomography is a method of reconstructing Images from its line integrals along a large number of intersecting rays In a plane. Simulations have shown that reconstructive tomography can provide good spatial resolution of the density of a species in gases.¹ Laser-probed computed tomography provides a nonintrusive method of measuring physical quantities in a plane rapidly in contrast with point measurement techniques. Furthermore, tomography does not require the ability to have access outside the plane of Interest, This feature makes tomography a very interesting diagnostic technique whenever 3-D access is not possible as is the case in opaque or very large systems. Because absorption measurements are made, tomography data are easier to interpret than fluorescence data whenever large-pressure differences affect the fluorescence rate through quenching, as in supersonic flow.

© 1983 Optical Society of America