Deflection yoke

Cathode ray tube, showing the yoke (copper coils and white plastic former) around the rear neck of the tube

A deflection yoke, is a kind of magnetic lens, used in cathode ray tubes that are used to process the electron beam by deflecting it vertically and horizontally.

In a CRT television, the electron beam very fast moved (scanned) on the screen in certain pattern vertical and horizontal direction in certain speed (frequency), so that, the video image could be produced throughout the screen, according to the signal of dissected image .

View inside the yoke, with the tube removed

Structure

An yoke coil of a black and white TV from few viewpoints

• 
  From front (screen) side of TV.
• 
  Side view.
• 
  from rear or back (not-visited) side of the TV.
• 
  from an angle.
• 
  from another angle.

See also

• Magnetic lens
• Quadrupole magnet
• Magnetic deflection
• Electron beam processing
• Analog television
• Analog television#Displaying an image
• Nipkow disk
• Image dissector
• Raster scan
• Scan line

References

http://www.dictionary.com/browse/deflection-yoke http://www.changhongglobal.com/egdch/files/ETE-2_Service_Manual.pdf http://www.oldtellys.co.uk/otcolour.html http://diagramasde.com/diagramas/otros2/Panasonic%20CT%20-%2025G6E%20Chasis%20AP361.pdf http://www.google.co.in/patents/US3310763 https://www.google.com/patents/US2852712 https://www.google.com.ar/patents/USRE31399 http://www.google.com/patents/EP0845798A1?cl=en http://www.google.co.ve/patents/US5220241 https://www.google.com.ar/patents/US4376273 https://www.google.com.tr/patents/US6836200