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- Optical_feedback abstract "Optical feedback is the optical equivalent of acoustic feedback. A simple example is the feedback that occurs when a loop exists between an optical input, e.g., a video camera, and an optical output, e.g., a television screen or monitor. (A simple example of optical feedback is also an image cast between mirrors.)In the animation and the still image examples (right), light from a candle is received by a video camera, amplified and then sent by cable to a monitor projecting electron beams to a monitor screen. The image on the monitor is then captured by the video camera again, and fed back to the monitor in a continuous loop.The original light source, in this case from the candle, can then be extinguished, while the feedback loop continues. For each loop the image is doubled and the image interferes with itself. The electronic loop moves with near light speed, but as the resulting image is projected onto the phosphor dots on the inside of the screen by the electron beam, the phosphor points take time to begin and stop glowing, and this creates a persistence which prevents the patterns changing too fast, and thus they survive long enough to be perceived. (More recent types of screens, such as plasma display, LCD and LED, can also be used)).The resulting images depend on different camera and monitor settings, such as light amplification, contrast, distance, angle and physical vibrations. Optical feedback can be combined with music, or other sound sources, to influence the image loop.".
- Optical_feedback thumbnail Optical-feedback-2-short.gif?width=300.
- Optical_feedback wikiPageExternalLink babuliababa.free.fr.
- Optical_feedback wikiPageExternalLink videofeedback.htm.
- Optical_feedback wikiPageExternalLink FractalLasers.php.
- Optical_feedback wikiPageExternalLink www.exploratorium.edu.
- Optical_feedback wikiPageExternalLink diagrams.html.
- Optical_feedback wikiPageExternalLink www.videofeedback.dk.
- Optical_feedback wikiPageExternalLink World.
- Optical_feedback wikiPageExternalLink index.html&date=2009-10-25+06:34:34.
- Optical_feedback wikiPageID "4967845".
- Optical_feedback wikiPageRevisionID "592033209".
- Optical_feedback hasPhotoCollection Optical_feedback.
- Optical_feedback subject Category:Artistic_techniques.
- Optical_feedback subject Category:Interference.
- Optical_feedback subject Category:Optics.
- Optical_feedback type Ability105616246.
- Optical_feedback type Abstraction100002137.
- Optical_feedback type ArtisticTechniques.
- Optical_feedback type Cognition100023271.
- Optical_feedback type Know-how105616786.
- Optical_feedback type Method105660268.
- Optical_feedback type PsychologicalFeature100023100.
- Optical_feedback type Technique105665146.
- Optical_feedback comment "Optical feedback is the optical equivalent of acoustic feedback. A simple example is the feedback that occurs when a loop exists between an optical input, e.g., a video camera, and an optical output, e.g., a television screen or monitor.".
- Optical_feedback label "Optical feedback".
- Optical_feedback label "ارتجاع ضوئي".
- Optical_feedback sameAs m.0cxmkd.
- Optical_feedback sameAs Q4132092.
- Optical_feedback sameAs Q4132092.
- Optical_feedback sameAs Optical_feedback.
- Optical_feedback wasDerivedFrom Optical_feedback?oldid=592033209.
- Optical_feedback depiction Optical-feedback-2-short.gif.
- Optical_feedback isPrimaryTopicOf Optical_feedback.
