نتایج جستجو برای: light propagation

تعداد نتایج: 498209  

Journal: :Journal of the Optical Society of America. A, Optics, image science, and vision 2006
Qian Wang Gerald Farrell Yuliya Semenova

Simulation of light propagation within nematic liquid-crystal (LC) devices is considered, of which the director is aligned normal to the z axis. A three-dimensional full-vector finite-difference beam propagation method for an anisotropic medium is presented and an alternating direction implicit scheme is adopted. Simulations of light propagation in a bulk polarization converter, a waveguide wit...

Journal: :Optics letters 2012
Christian Schulze Daniel Flamm Michael Duparré Andrew Forbes

We present a fast and easy technique for measuring the beam propagation ratio, M(2), of laser beams using a spatial light modulator. Our technique is based on digitally simulating the free-space propagation of light, thus eliminating the need for the traditional scan in the propagation direction. We illustrate two approaches to achieving this, neither of which requires any information of the la...

Journal: :Biomedical optics express 2014
Zhengyi Yang Martynas Prokopas Jonathan Nylk Clara Coll-Lladó Frank J Gunn-Moore David E K Ferrier Tom Vettenburg Kishan Dholakia

Light-sheet imaging is rapidly gaining importance for imaging intact biological specimens. Many of the latest innovations rely on the propagation-invariant Bessel or Airy beams to form an extended light sheet to provide high resolution across a large field of view. Shaping light to realize propagation-invariant beams often relies on complex programming of spatial light modulators or specialized...

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