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- Rapatronic_camera abstract "The rapatronic camera (a portmanteau of rapid action electronic) is a high-speed camera capable of recording a still image with an exposure time as brief as 10 nanoseconds.The camera was developed by Harold Edgerton in the 1940s and was first used to photograph the rapidly changing matter in nuclear explosions within milliseconds of ignition, using exposures of several microseconds. To overcome the speed limitation of a conventional camera's mechanical shutter, the rapatronic camera uses two polarizing filters and a Faraday cell (or in some variants a Kerr cell). The two filters are mounted with their polarization angles at 90° to each other, to block all incoming light. The Faraday cell sits between the filters and changes the polarization plane of light passing through it depending on the level of magnetic field applied, acting as a shutter when it is energized at the right time for a very short amount of time, allowing the film to be properly exposed. In magneto-optical shutters, the active material of the Faraday cell (e.g. dense flint glass, which reacts well to strong magnetic field) is located inside an electromagnet coil, formed by few loops of thick wire. The coil is powered through a pulse forming network, by a discharge of a high-voltage capacitor (e.g. 2 microfarads at 1000 volts), switched into the coil by a trigatron or a thyratron.In electro-optical shutters, the active material is a liquid, typically nitrobenzene, located in a cell between two electrodes. A brief impulse of high voltage is applied to rotate the polarization of the passing light.For a film-like sequence of high-speed photographs, as used in the photography of nuclear and thermonuclear tests, arrays of up to 12 cameras were deployed, with each camera carefully timed to record sequentially.Each camera was capable of recording only one exposure on a single sheet of film. Therefore, in order to create time-lapse sequences, banks of four to ten cameras were set up to take photos in rapid succession. The average exposure time used was three microseconds.".
- Rapatronic_camera thumbnail Tumbler_Snapper_rope_tricks.jpg?width=300.
- Rapatronic_camera wikiPageExternalLink rapatronic-shutter.
- Rapatronic_camera wikiPageExternalLink detail.php?t=objects&type=browse&f=maker&s=Edgerton%2C+Germeshausen+and+Grier%2C+Inc.&record=8.
- Rapatronic_camera wikiPageID "2930880".
- Rapatronic_camera wikiPageLength "3525".
- Rapatronic_camera wikiPageOutDegree "21".
- Rapatronic_camera wikiPageRevisionID "690374503".
- Rapatronic_camera wikiPageWikiLink Category:Cameras_by_type.
- Rapatronic_camera wikiPageWikiLink Electromagnet.
- Rapatronic_camera wikiPageWikiLink Faraday_effect.
- Rapatronic_camera wikiPageWikiLink File:Tumbler_Snapper_rope_tricks.jpg.
- Rapatronic_camera wikiPageWikiLink Film.
- Rapatronic_camera wikiPageWikiLink Flint_glass.
- Rapatronic_camera wikiPageWikiLink Harold_Eugene_Edgerton.
- Rapatronic_camera wikiPageWikiLink High-speed_photography.
- Rapatronic_camera wikiPageWikiLink Kerr_cell_shutter.
- Rapatronic_camera wikiPageWikiLink Kerr_effect.
- Rapatronic_camera wikiPageWikiLink Millisecond.
- Rapatronic_camera wikiPageWikiLink Nanosecond.
- Rapatronic_camera wikiPageWikiLink Nitrobenzene.
- Rapatronic_camera wikiPageWikiLink Nuclear_explosion.
- Rapatronic_camera wikiPageWikiLink Nuclear_weapons_testing.
- Rapatronic_camera wikiPageWikiLink Polarization_(waves).
- Rapatronic_camera wikiPageWikiLink Pulse_forming_network.
- Rapatronic_camera wikiPageWikiLink Shutter_(photography).
- Rapatronic_camera wikiPageWikiLink Thyratron.
- Rapatronic_camera wikiPageWikiLink Trigatron.
- Rapatronic_camera wikiPageWikiLinkText "Rapatronic camera".
- Rapatronic_camera wikiPageWikiLinkText "rapatronic camera".
- Rapatronic_camera wikiPageUsesTemplate Template:Commons.
- Rapatronic_camera wikiPageUsesTemplate Template:Reflist.
- Rapatronic_camera subject Category:Cameras_by_type.
- Rapatronic_camera hypernym Camera.
- Rapatronic_camera type TelevisionShow.
- Rapatronic_camera type Redirect.
- Rapatronic_camera comment "The rapatronic camera (a portmanteau of rapid action electronic) is a high-speed camera capable of recording a still image with an exposure time as brief as 10 nanoseconds.The camera was developed by Harold Edgerton in the 1940s and was first used to photograph the rapidly changing matter in nuclear explosions within milliseconds of ignition, using exposures of several microseconds.".
- Rapatronic_camera label "Rapatronic camera".
- Rapatronic_camera sameAs Q1548465.
- Rapatronic_camera sameAs Rapid_Action_Electronic.
- Rapatronic_camera sameAs Rapatronic-Kamera.
- Rapatronic_camera sameAs Rapatronic.
- Rapatronic_camera sameAs دوربین_راپاترونیک.
- Rapatronic_camera sameAs Rapatroninen_kamera.
- Rapatronic_camera sameAs Rapid_Action_Electronic.
- Rapatronic_camera sameAs Câmera_rapatrônica.
- Rapatronic_camera sameAs m.08df3d.
- Rapatronic_camera sameAs Q1548465.
- Rapatronic_camera wasDerivedFrom Rapatronic_camera?oldid=690374503.
- Rapatronic_camera depiction Tumbler_Snapper_rope_tricks.jpg.
- Rapatronic_camera isPrimaryTopicOf Rapatronic_camera.