Axial intensity distribution of converging spherical wave behind an elliptic aperture

0374688 - ÚFE 2012 RIV US eng C - Konferenční příspěvek (zahraniční konf.)
Miler, Miroslav - Martan, Tomáš
Axial intensity distribution of converging spherical wave behind an elliptic aperture.
Proceedings of SPIE - HOLOGRAPHY: ADVANCES AND MODERN TRENDS II. Vol. 8074. Bellingham: SPIE, 2011 - (Hrabovský, M.; Miler, M.; Sheridan, J.), s. 8074111-8074118. ISBN 9780819486646. ISSN 0277-786X.
[Conference on Holography - Advances and Modern Trends II. Praha (CZ), 18.04.2011-20.04.2011]
Výzkumný záměr: CEZ:AV0Z20670512
Klíčová slova: diode * holography * converging wave
Kód oboru RIV: JA - Elektronika a optoelektronika, elektrotechnika

Off-axis holographic diffractive optics creates beams with an elliptic cross section. Focusing properties of that beams differ from beams having a circular aperture. Axial intensity distributions of converging spherical waves behind elliptic apertures are analyzed. Similarly to behaviour of circular cross section beams, main maxima move from the geometric focus to the location of the aperture with decreasing the Fresnel number. However, their displacements and values are higher than for the circumscribed circular aperture. Minima of curves do not achieve zero values as expected. All results can not be given in closed form; only numerical results for specific parameters can be computed.
Trvalý link: http://hdl.handle.net/11104/0207547