Abstract

Three-dimensional (3-D) imaging has been scientifically and practically attractive. Although several methods were studied, most of them are classified into two groups as follows: one of them, such as moiré topography,¹ does not offer direct images but requires rather complex image processing; the other, such as laser ranging, requires scanning of laser beam or of delay time of the pulse,² thus simultaneous measurements necessary for moving objects are impossible. In this paper, we propose a new method in which simultaneous imaging is realized without the need for scanning of laser beam or of delay time by means of conversion between the time and color axes mediated by the chirped pulse in which the color of light changes regularly along the time axis.

© 1995 IEEE