Spiral phase dislocations with an arbitrary phase jump

0303860 - URE-Y 20010045 FR eng A - Abstract
Aubrecht, Ivo - Miler, Miroslav - Pala, Jan
Spiral phase dislocations with an arbitrary phase jump.
[Paris]: EOS, 2001. European Optical Society Topical Meetings Digest Series., 29. ISSN 1167-5357. Electromagnetic Optics 2. s. 56
[EOS Topical Meeting on Electromagnetic Optics /2./. 26.08.2001-30.08.2001, Paris]
R&D Projects: GA ČR GA202/01/0428
Institutional research plan: CEZ:AV0Z2067918
Keywords : diffraction * laser beams * screw dislocations
Subject RIV: BH - Optics, Masers, Lasers

Optical fields from a phase plate with a helical variation of its thickness are investigated in the Fraunhofer diffraction zone. The plate is masked with a ring aperture, and there is a thickness step along a half-line from the plate's centre, the dislocation half-line. On- and off-axis diffraction patterns are calculated and their variations with a parameter proportional to the magnitude of the step are demonstrated. Features of symmetry of the patterns are discussed.
Permanent Link: http://hdl.handle.net/11104/0114044