Abstract
The use of ultrashort optical pulses has led to a variety of highly functional measurements because of its time selectivity and efficient nonlinear optical effects caused by both temporal and spatial localizations and high peak intensity. In this paper, two examples of its applications to dimensional measurements that our group recently developed are described. First, a nonscanning method for three-dimensional shape measurement, which is realized by means of conversion between time and color axes mediated by chirped pulses, is described. The principle, performance, and some examples are shown. Next, method for in situ dimensional measurement of complex optical parts using a femtosecond two-color interferometer (FTI) is shown. Without changing the experimental setup, measurement of lens shape and thickness is achieved, together with good stability and easy alignment.
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