Imaging+power
61Signal-to-noise ratio — For signal to noise ratio in statistics, see Cohen s d. Signal to noise ratio (often abbreviated SNR or S/N) is a measure used in science and engineering that compares the level of a desired signal to the level of background noise. It is defined… …
62Optical telescope — Eight Inch refracting telescope (Chabot Space and Science Center) An optical telescope is a telescope which is used to gather and focus light mainly from the visible part of the electromagnetic spectrum for directly viewing a magnified image for… …
63Optical coherence tomography — Intervention Optical Coherence Tomography (OCT) image of a sarcoma MeSH …
64Diffraction topography — (short: topography ) is an X ray imaging technique based on Bragg diffraction. Diffraction topographic images ( topographs ) record the intensity profile of a beam of X rays (or, sometimes, neutrons) diffracted by a crystal. A topograph thus… …
65Glossary of military abbreviations — List of terms, acronyms, information, related to modern armour, artillery, infantry, weapons, and related military subject matter.* AA anti aircraft * AAA anti aircraft artillery Triple A * AAAV Advanced Amphibious Assault Vehicle * AAD Armoured… …
66Mars Reconnaissance Orbiter — Conceptual image depicting the Mars Reconnaissance Orbiter in an elliptical low planet orbit around Mars Operator NASA / JPL Major contractors Lockheed Ma …
67Mars Science Laboratory — mission 2011 concept artwork Operator NASA Major contractors Boeing Lockheed Martin …
68Pentax cameras — This article discusses the cameras – mainly 35 mm SLRs – manufactured by Hoya Corporation s Pentax division (ペンタックス, Pentakkusu?) and its predecessors, Pentax Corporation (ペンタックス株式会社, Pentakkusu Kabushiki gaisha …
69Sonar — This article is about underwater sound propagation. For atmospheric sounding, see SODAR. For other uses, see Sonar (disambiguation) …
70LIDAR — A FASOR used at the Starfire Optical Range for LIDAR and laser guide star experiments is tuned to the sodium D2a line and used to excite sodium atoms in the upper atmosphere …
