Browsing Konferencijų pranešimų santraukos / Conference and Meeting Abstracts by Source "Mathematical modelling and analysis : 11th international conference : book of abstracts : May 31 - June 3, 2006, Jūrmala, Latvia"

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    • Numerical treatment of focal shift of focused axially symmetric laser beams 

      Čiegis, Raimondas; Dementjev, Aleksandr; Račkaitis, Kęstutis; Slavinskis, Nerijus; Šilko, Galina (Mathematical modelling and analysis : 11th international conference : book of abstracts : May 31 - June 3, 2006, Jūrmala, Latvia, 2006)
      Focal shift is a well known phenomenon at present [1]-[3]. It occurs when a converging wave is diffracted at an small aperture with Fresnel number Np = a2 /Xf ^ 1, where / is the radius of the spherical wave in the aperture ...