Abstract
It is well known that linear CCD arrays have many advantages in static measurement, but many problems exist in dynamic measurement. For example, frequency bandwidth of an optical signal that can be tested is narrow and precision of sampled values is low in the case of continuous laser used as light source for a specific linear CCD array now available. So a method in which pulse laser is used is given to solve the problems. Not only precision of sampled values is improved, frequency bandwidth of an optical signal that can be tested is also extended. Potentialities of the specific linear CCD array now available is fully exploited. In this paper, how to make pulse laser and how to design electric circuits of a linear CCD array are discussed. The key step is how to synchronize them. Then, the sampling of placement signals using linear CCD array is compared with the sampling of voltage signals using A/D converters in concept. This would give us more clear image on comprehending the important role of pulse laser. At last, dynamic range of linear CCD arrays and some problems needing solving are discussed.
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