Method of focusing laser beam based on analysis of spatial frequencies of surface image

摘要

The method of a focusing objective, spatial spectrum, based on the analysis, of images is circumscribed. The theoretical substantiation is shown it. Is shown, that for a surface of any object exists of one or several resonant spatial frequencies, which in a focal point have maximum intensity. It is connected to a method of formation of a roughness. Because of theories of stochastic and random oscillations, is asserted, that all actual rough surfaces are not absolute random in a sense of a theory of probabilities. Therefore, optical fields generated by these objects, too not random. The image in this case grows out interactions of a field with a screen. Such submission has allowed to use as the characteristic of an optical field correlation dimensionality of its spatial chaos. The conducted researches have allowed to combine process of precision guidance on a focal point of the technological laser with obtaining of a sharp image of a treated surface.