Minimizing the Bright/Shadow Focal Spot Size with Controlled Side-Lobe Increase in High-Numerical-Aperture Focusing Systems | Zendy

Svetla. Khonina | Zendy; С. В. Карпеев | Zendy

Open Access

Minimizing the Bright/Shadow Focal Spot Size with Controlled Side-Lobe Increase in High-Numerical-Aperture Focusing Systems

Author(s) -

Svetla. Khonina,

С. В. Карпеев

Publication year - 2013

Publication title -

advances in optical technologies

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.124

H-Index - 25

eISSN - 1687-6407

pISSN - 1687-6393

DOI - 10.1155/2013/267684

Subject(s) - apodization , side lobe , optics , radius , shadow (psychology) , physics , aperture (computer memory) , vortex , amplitude , phase (matter) , diffraction , main lobe , numerical aperture , hot spot (computer programming) , computer science , mechanics , acoustics , telecommunications , psychology , computer security , quantum mechanics , antenna (radio) , psychotherapist , operating system , wavelength

Minimizing the bright/shadow focal spot size for differently polarized incident waves through the additional apodization of the focusing system output pupil by use of an optical element with the vortex phase dependence on angle and the polynomial amplitude dependence on radius is studied. The coefficients of the radial polynomial were optimized with the aim of fulfilling certain conditions such as the energy efficiency preservation and keeping the side lobes under control. The coefficients were chosen so as to minimize the functional using Brent’s method

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