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A system for the spatial characterization of a laser beam using an optoelectronic imaging device is described. A two-dimensional photodiode array interfaced to a small computer is used to obtain the image of the beam’s cross section; the peak position, peak intensity, and Gaussian peak width can then be computed and displayed. Details of the array interface, the graphics, and the data-processing algorithm are provided.
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Knudtson et al. (1983) studied this question.
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