focusing by diffraction
61Kerr-lens modelocking — (KLM) is a method of modelocking lasers via a nonlinear optical process known as the optical Kerr effect . This method allows the generation of pulses of light with a duration as short as a few femtoseconds.The optical Kerr effect is a process… …
62Anton Zeilinger — Infobox Scientist box width = 300px name = Anton Zeilinger image size = 300px caption = Anton Zeilinger (photo credit: J. Godany) birth date = 20 May 1945 birth place = Ried im Innkreis, Austria death date = death place = residence = flag|Austria …
63Atomic mirror — In physics, an atomic mirror is a device which reflects neutral atoms in the similar way as the conventional mirror reflects visible light.Atomic mirrors can be made of electric fields or magnetic fields,cite journal… …
64Ridged mirror — In atomic physics, a ridged mirror (or ridged atomic mirror, or Fresnel diffraction mirror) is a kind of atomic mirror, designed for the specular reflection of neutral particles (atoms) coming at the grazing incidence angle, characterised in the… …
65Topography (disambiguation) — Topography may refer to:* Cartography, geology and oceanography ** Topography, the study of the current terrain features of a region and the graphic representation of the landform on a map. This is distinct from geomorphology, the study of the… …
66ultrasonics — /ul treuh son iks/, n. (used with a sing. v.) the branch of science that deals with the effects of sound waves above human perception. [1930 35; see ULTRASONIC, ICS] * * * Vibrational or stress waves in elastic media that have a frequency above… …
67Pfund telescope — The Pfund telescope, originated by A. H. Pfund, provides another method for achieving a fixed telescope focal point in space regardless of where the telescope line of sight is pointed. This configuration utilizes a two axis feed flat mirror to… …
68Roberto Merlin — Roberto D. Merlin is an Argentine physicist and Professor of Physics and of Electrical Engineering and Computer Science at the University of Michigan. He is known, among other things, for his work on quasiperiodic superlattices, squeezed phonons …
69Rendering (computer graphics) — Not to be confused with 3D rendering. A variety of rendering techniques applied to a single 3D scene …
70Loudspeaker — For other uses, see Loudspeaker (disambiguation). An inexpensive, low fidelity 3½ inch speaker, typically found in small radios …
