منابع مشابه
Negative index lens aberrations.
We examine the Seidel aberrations of thin spherical lenses composed of media with refractive index not restricted to be positive. We find that consideration of this expanded parameter space allows for the reduction or elimination of more aberrations than is possible with only positive index media. In particular, we find that spherical lenses possessing real aplanatic focal points are possible o...
متن کاملElectrodynamics of the Planar Negative Index Lens
We analyze a planar lens with negative index of refraction to develop analytical expressions describing EM evanescent and propagating waves. Resolution, field magnitude, and field intensity of the superlens is identical for equal absorption and gain parameters. Subwavelength resolution is achieved by the Planar NIM lens in the near-field regime due to amplification and recovery of evanescent fi...
متن کاملLens Aberrations and Ray Tracing
When beam quality is a concern in an optical setup, lens aberrations are an undesired side-effect. Which aberration affects a particular experiment is not always as obvious as one would like. Take for example, the simple goal to concentrate the maximum amount of optical power at a certain point using a lens. The first “obvious” requirement is that the initial beam should be well collimated, sen...
متن کاملExploiting lens aberrations to create electron-vortex beams.
A model for a new electron-vortex beam production method is proposed and experimentally demonstrated. The technique calls on the controlled manipulation of the degrees of freedom of the lens aberrations to achieve a helical phase front. These degrees of freedom are accessible by using the corrector lenses of a transmission electron microscope. The vortex beam is produced through a particular al...
متن کاملOptical aberrations in a spinning pipe gas lens.
If a heated pipe is rotated about its axis, a density gradient is formed which results in the pipe acting as a graded index lens. In this study we revisit the concept of a spinning pipe gas lens and for the first time analyse both the wave propagation of optical fields through the lens, and determine the optical aberrations introduced by the lens to the laser beam. We show that such lenses are ...
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ژورنال
عنوان ژورنال: Physical Review E
سال: 2004
ISSN: 1539-3755,1550-2376
DOI: 10.1103/physreve.70.065601