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Optical Vortices and Their Propagation
Abstract Free space propagation of an array of optical vortices nested in a smooth (Gaussian) beam is studied in the paraxial regime. It is found that when the vortices have all the same charge,Expand
Profile measurement using projection of running fringes.
A method of profile control or measurement using projected fringes is presented. The fringes are dynamically translated over the object, and the phase of the signal picked up at a selected point onExpand
Imaging properties of scanning holographic microscopy.
Scanning heterodyne holography is an alternative way of capturing three-dimensional information on a scattering or fluorescent object. We analyze the properties of the images obtained by this novelExpand
Nondiffracting optical fields: some remarks on their analysis and synthesis
Recently Durnin pointed out the existence of nondiffracting beams that propagate in free space with their energy confined around their axis but that experience no spread or divergence [ J. Opt. Soc.Expand
Imaging with Fresnel zone pupil masks: extended depth of field.
Fresnel zone plates are used as pupil apertures to extend the depth of field of an incoherent imaging system. The defocused optical transfer function is evaluated approximately, and the results areExpand
Twin-image elimination experiments for three-dimensional images in optical scanning holography.
Twin-image elimination in the context of optical scanning holography has recently been proposed. The proposed technique involves simultaneously acquiring sine and cosine Fresnel holograms. A complexExpand
Imaging through scattering media with depth resolution by use of low-coherence gating in spatiotemporal digital holography.
We demonstrate optical gating through scattering media based on low-coherence spatiotemporal digital holography. Expand
Scanning holographic microscopy with resolution exceeding the Rayleigh limit of the objective by superposition of off-axis holograms.
We present what we believe to be a new application of scanning holographic microscopy to superresolution. Spatial resolution exceeding the Rayleigh limit of the objective is obtained by digitalExpand
Properties of a scanning holographic microscope: improved resolution, extended depth-of-focus, and/or optical sectioning
The imaging characteristics of a scanning holographic microscope are described, and compared with the performance of a conventional wide-field or scanning microscope using the same objective. UniqueExpand
Incoherent spatial filtering with a scanning heterodyne system.
We describe a two-pupil system with two pupils in the receiving optics using a scanning illumination technique and compare its attributes with more conventional techniques. Expand