SIMULTANEOUS 3-D IMAGING USING CHIRPED ULTRASHORT OPTICAL PULSES

A novel method for simultaneous 3-D imaging using chirped ultrashort l ight pulses is proposed. Simultaneous imaging without scanning is poss ible by means of the conversion between the time and the color axes me diated by the chirped pulse. The theoretical limitation of the spatial resolution is discussed. We proved the efficacy of this method by mea suring an area composing three flat steps made of three gauge blocks o f different lengths with an accuracy of better than 0.3 mm. This techn ique is applicable for imaging of the shape of moving objects, or surf ace testing or inspection.