Tecnología de la televisión: del disco de Nipkow a la revolución numérica [ Carmen Peñafiel] on *FREE* shipping on qualifying offers. Lejona. Nipkow-Disk Category:Nipkow disks enwiki Nipkow disk; eowiki Nipkov- disko; eswiki Disco de Nipkow; frwiki Disque de Nipkow; glwiki Disco de Nipkow . Deep Red Leather-like Accent Chair, Small Office Waiting Area Chair – perfect for small spaces, the clean lines and art deco look of this chair are almost as great.
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Another drawback of the Nipkow disk as an image scanning device: Summary [ edit ] Description Disco nipkow The scanning system simply “picks off” the accumulated charge as it sweeps past each site on the target.
Retrieved from ” https: The actual amount of light gathered is instantaneous, occurring through a very small aperture, and the net yield is only a microscopic percentage of the incident energy. When the disk rotates, the holes trace circular ring patterns, with inner and outer diameter depending on each hole’s position on the disk and thickness equal to each hole’s diameter.
Description Disco nipkow The resolution along a Nipkow disk’s scanline is potentially very high, being an analogue scan. Another advantage is that the receiving device is very similar to the acquisition device, except that the light-sensitive device disdo replaced by a variable light source, driven by the signal provided by the acquisition device.
Apart from the aforementioned mechanical television, which never became popular for the nipkiw reasons mentioned above, a Nipkow disk is used in one type of confocal microscopea powerful optical microscope.
This can be intuitively understood by covering all of the disk but a small rectangular area with black cardboard which stays fixedspinning the disk and observing an object through the small area. Unsourced material may be challenged and removed.
Views Read Edit View history. Views View Edit History. The scanning disk can be replaced by a polygonal mirror, but this suffers from the same problem — lack of integration over time. nnipkow
File:Disco nipkow 24.svg
Nipkow disk template with 24 holes and window. By spinning the disk rapidly enough, the object seems complete and capturing of motion becomes possible. The size of the reproduced image is again determined by the size of the disc; a larger disc produces a larger image.
Retrieved from ” https: Light is conveyed into the sensing system as the small aperture scans over the entire field of view. Simple calculations show that, for equally sensitive photosensitive receptors, the iconoscope is hundreds to thousands of times more sensitive than the disk or the Farnsworth scanner. A simple acquisition device can be built by using an electrical motor driving a Nipkow disk, a small box containing a single light-sensitive electric element and a conventional image focusing device lens, dark boxetc.
From Wikipedia, the free encyclopedia. If the file has been modified from its original state, some details nipiow as the timestamp may not fully reflect those of the original file.
This article needs additional citations for verification. Iconoscopes and their successors accumulate energy on the target continuously, thereby integrating energy over time.
Disco de Nipkow – Wikipedia, a enciclopedia libre
Articles needing additional references from March All articles needing additional references. Nipkwo disadvantages include the non-linear geometry of the scanned images, and the impractical size of the disk, at least in the past.
The acquisition part of the system was not much better, requiring very powerful lighting of the subject. In other projects Wikimedia Commons. Please help improve this article by adding citations to reliable sources.
Television technology History of television German inventions in science in Germany. A Nipkow disk sometimes Anglicized as Nipkov disk; patented inalso known as scanning diskis a mechanical, rotating, geometrically operating image scanning device, patented discco by Paul Gottlieb Nipkow. March Learn how and when to remove this template message. Archived from the original on A lens projects an image of the scene in front of it directly onto the disk.
The timestamp is only as accurate as the clock in the camera, and it may be completely wrong. Some means of synchronizing the disks on the two devices must also be devised several options are possible, ranging from manual to electronic control signals. When spinning the disk while observing an object “through” the disk, preferably through a relatively small circular sector of the disk the viewportfor example, an disfo quarter or eighth of the disk, the object seems “scanned” line by line, first by length or height or even diagonally, depending on the exact sector chosen for observation.