Topics in this Issue
Images of atmospheric ice crystals, reconstructed from digital holograms. The holograms were obtained at the High Altitude Research Station "Jungfraujoch," located 3.5km a.s.l. in the Swiss Alps. Reconstructions based on the hologram intensity alone are troubled by a spurious "twin image" (left). Recovering the hologram's phase distribution using the cascaded adaptive mask phase retrieval algorithm allows for twin image removal (right), in some cases revealing otherwise unobservable structural details (top right). The lower images show a bundle (rosette) of ice columns with dendritic endplates. The holograms are recorded as 8 bit grayscale images using laser light at 532 nm. Here, the reconstructions are shown in false color and the top images are inverted for better display. For details see the paper by Raupach, pp. 287-301.
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- Apr 07 2014 : Alison Taylor Joins The Optical Society as Executive Editor - The Optical Society (OSA) announced today that Alison Taylor has... more
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- Optical properties of the metals Al, Co, Cu, Au, Fe, Pb,...
- Optical Constants of Water in the 200-nm to 200-?m...
- Optical Properties of Metallic Films for Vertical-Cavity...
- Huygens–Feynman–Fresnel principle as the...
- Vibration detection by observation of speckle patterns
- Phase retrieval algorithms: a comparison
- Optical properties of fourteen metals in the infrared and...
- Phase retrieval algorithms: a personal tour [Invited]
- Laser Beams and Resonators
- Blue moons and Martian sunsets