Video camera

From Wikipedia, the free encyclopedia
  (Redirected from Video cameras)
Jump to: navigation, search
Modern digital television camera with a DIGI SUPER 86II xs lens from Canon. The camera was used during a bandy match between Hammarby and GAIS in Elitserien, Zinkendamms IP (Stockholm) 2012-02-11.

A video camera is a camera used for electronic motion picture acquisition (as opposed to a movie camera, that earlier recorded the images on film), initially developed for the television industry but now common in other applications as well.

The earliest video cameras were those of John Logie Baird, based on the mechanical Nipkow disk and used in experimental broadcasts through the 1920s-30s. All-electronic designs based on the video camera tube, such as Vladimir Zworykin's Iconoscope and Philo Farnsworth's Image dissector, supplanted the Baird system by the 1930s and remained in wide use until the 1980s, when cameras based on solid-state image sensors such as CCDs (and later CMOS active pixel sensors) eliminated common problems with tube technologies such as image burn-in and made digital video workflow practical. The transition to digital TV gave boost to digital video cameras and by 2010s, most of the video cameras were digital video cameras.

With the advent of digital video capture, the distinction between professional video cameras and movie cameras have disappeared as the intermittent mechanism has became the same. Nowadays, mid-range cameras exclusively used for television and other works (except movies) are termed as professional video cameras.

Video cameras are used primarily in two modes. The first, characteristic of much early broadcasting, is live television, where the camera feeds real time images directly to a screen for immediate observation. A few cameras still serve live television production, but most live connections are for security, military/tactical, and industrial operations where surreptitious or remote viewing is required. In the second mode the images are recorded to a storage device for archiving or further processing; for many years, videotape was the primary format used for this purpose, but gradually supplanted by optical disc, hard disk, and finally flash memory. Recorded video is used in television production, and more often surveillance and monitoring tasks where unattended recording of a situation is required for later analysis.

Modern video cameras have numerous designs and uses which are listed below.

See also[edit]

References[edit]

External links[edit]