Essential Anatomy Dissector
Essential anatomy dissector Save on exactly what you need.
www.half.com

Image dissector - Wikipedia, the free encyclopedia
The image dissector was an early all-electronic television camera tube invented ... Farnsworth's Image Dissector. U.S. patent, filed 1933, issued 1937. ...
en.wikipedia.org

IEEEVM: Farnsworth's Image Dissector
This tube, for which he filed a patent in 1927, was called the Image Dissector. ... In the simplification, the image dissector "sees" the outside world through a ...
www.ieee-virtual-museum.org

Image Dissector Iconoscope Monoscope tubes
The image dissector is a camera tube occasionally employed in industrial television systems. ... The image dissector has no storage characteristic which ...
www.aade.com

Video camera tube - Wikipedia, the free encyclopedia
The image dissector was invented by Philo Farnsworth, one of the pioneers of ... The image dissector had very poor light sensitivity, and was useful only where ...
en.wikipedia.org

image dissector image dissector
i picture your image erased in horizontal rows, that sort. of a death ... image dissector. embroiling him in patent suits that would siphon. Philo?s money and life ...
www.createdestroyenjoy.net

ETF - Image Dissector Camera
It uses an image dissector tube, and was made to monitor boilers in power plants. The image dissector had very poor light sensitivity, but it was ideal for high ...
www.earlytelevision.org

Part 6 - The Farnsworth Chronicles
Tune into The Farnovision and read The Farnsworth Chronicles, a detailed account of the life of Philo T. Farnsworth ... performance of the Image Dissector. ...
www.farnovision.com

Part 9 - The Farnsworth Chronicles
Tune into The Farnovision and read The Farnsworth Chronicles, a detailed account of the life of Philo T. Farnsworth - the ... The Image Dissector also ...
www.farnovision.com

image dissector: Definition from Answers.com
image dissector ( ?imij di?sekt?r ) ( computer science ) In optical character recognition, a device that optically examines an input character for the
www.answers.com

Warning: mkdir() [function.mkdir]: Permission denied in /home/webs/affiliatelib2/CacheManager.php on line 12

Warning: mkdir() [function.mkdir]: No such file or directory in /home/webs/affiliatelib2/CacheManager.php on line 12

Warning: fopen(/home/templatecore2cache//*cluesnet.com/e5/e59e79979e167611247ca1db1b6526d771beef8c.tc2cache) [function.fopen]: failed to open stream: No such file or directory in /home/webs/affiliatelib2/CacheManager.php on line 130

Warning: fwrite(): supplied argument is not a valid stream resource in /home/webs/affiliatelib2/CacheManager.php on line 131

Warning: fclose(): supplied argument is not a valid stream resource in /home/webs/affiliatelib2/CacheManager.php on line 132

The image dissector was an early all-electronic television camera tube invented by Philo Farnsworth.

Most experimental television systems in the 1920s and 1930s made use of an Mechanical television, usually a Nipkow disk combined with a single photoelectric cell for scanning an image and creating an electrical output. A similar device operating in reverse was used to project the image onto the picture screen.

In 1922, Philo Farnsworth, a teenage farmboy in Idaho, discovered that one could use a cathode ray tube to generate an electrical television signal without the need for a mechanical scanning device. The image dissector focused an image onto a layer of cesium oxide, which emitted electrons proportional to the intensity of the light. Only a small portion of the electron stream passed through an aperture to the electron collecting plate, representing a single point of the television image. Electromagnets were used to focus and deflect the electrons so that the total image was sequentially scanned.

Farnsworth's Image Dissector was successfully demonstrated and patent applications were made in 1927. This was the first successful demonstration of a fully electronic television system. Farnsworth continued making improvements to his system, and by 1929, image clarity and number of lines of resolution exceeded the achievements of the mechanical television systems.

The Image Dissector is not very efficient because the bulk of the electrons produced do not pass through the aperture and are discarded. Very bright lighting is required for it to be used as a television camera.

The Iconoscope invented by Vladimir Zworykin improved on Farnsworth's invention by combining the photosensitive material at each point with a capacitor so that all the electrons were captured. A separate beam of electrons was then used to scan over the image surface, resulting in an electrical current proportional to the quantity of stored electrons at each point.

The Farnsworth Image Dissector was commercially produced for applications where very bright lighting existed, such as monitoring the interior of industrial furnaces.

Farnsworth also earned income from the production of the Iconoscope television cameras, because Zworykin's device was based on several patents that Farnsworth owned.

External links

• The Farnovision - history of Philo Farnsworth and invention of the Image Dissector
• Farnsworth's Image Dissector