Dept. Elect. Eng.

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Rotating Beams
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Yoav Y. Schechner

• Dept. Elect. Eng.
• Technion Israel Institute of Technology

Joint studies with J. Shamir, R. Piestun, A.
Greengard
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Waves having a Phase Dislocation
Yoav Schechner
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Waves having a Phase Dislocation
Yoav Schechner
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Anisotropic Dislocations
Anisotropic dislocation
Parameterizations

• Morphological
• Stretch angle
• Eccentricity
• Dark fringe a limit of eccentricity

• Physical
• Superposition of isotropic waves
• Dark fringe annihilation of isotropic
  dislocations
• Angular momentum

Schechner Shamir
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Rotating PSF
Schechner
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Computer-Generated Hologram (Diffractive
Optical Element)
Schechner et. al, Physical Review E 1996
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Utopian Geometric PSF
Width changes linearly with z
Yoav Schechner
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z
Width changes with z by just a 2nd order
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Standard PSF
Rotating PSF
Greengard, Schechner, Piestun
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Greengard, Schechner, Piestun Depth from
diffracted rotation