Publication de 12 numéros par an
ISSN Imprimer: 0040-2508
ISSN En ligne: 1943-6009
Indexed in
Study of Spatial Frequency Spectra for Solution of Focusing Problems
RÉSUMÉ
Method for focusing the objective lens based on analysis of a spatial spectrum of images, is described and its theoretical justification is presented. It is shown that there are one or several resonant spatial frequencies on a surface of any one object. For every resonance frequency a focal point has maximum intensity. It is associated with features of roughness formation. Processes of grinding and polishing result in that the rough surfaces are not absolutely random ones in terms of the probability theory. Consequently, optical fields generated by these objects are not also random. The conducted researches have allowed the combining process of fine focusing of a material-working laser with acquisition of a clearly defined image of a working surface.