The first cathode
ray tube scanning device was invented by the German scientist Karl
Ferdinand Braun in 1897. Braun introduced a cathode-ray tube with a fluorescent
screen, known as the cathode-ray oscilloscope.
Braun, a German physicist shared
the Nobel Prize for Physics in 1909 with Guglielmo
Marconi for the development of wireless telegraphy.
He demonstrated the first oscilloscope (Braun tube) in 1897, after work
on high frequency alternating currents.
The cathode-ray oscilloscope is
an electronic display device containing a cathode-ray tube (CRT), used
to produce visible patterns that are the graphical representations of electrical
Though Karl Ferdinand Braun shared,
with Guglielmo Marconi, the 1909 Nobel Prize in Physics for achievements
in wireless telegraphy, he is rarely remembered for that honor. He is better
known for building the first cathode ray tube (CRT), or "Braun tube" as
it is still known in Germany, in 1897.
Braun - Cathode Ray Tube
Ferdinand Braun shared the 1909 Nobel prize with Marconi "in
recognition of their contributions to the development of wireless
telegraphy". View an actual 1897 Braun Tube (Braunsche Röhre).
Ferdinand Braun, Dr : 1850 - 1918
Braun, who spent his career as a
professor of physics at German universities, increased the range of Marconi's
transmitter, invented the crystal rectifier (a device that allows current
to flow in only one direction, and improves radio transmission), and later
invented the oscilloscope, a cathode-ray-tube laboratory device that was
the forerunner of today's television and radar tubes.
In 1874, Karl Ferdinand Braun (1850-1918)
discovered one way conduction in metal sulfide crystals. Radio receivers
required a device called a rectifier to detect signals. He used the rectifying
properties of the galena crystal, a semiconductor material composed of
lead sulfide, to create the cat's whisker diode for this purpose. Thus
was born the first semiconductor device.
of the Cathode Ray Tube
History of Television
Important disclaimer information about this About site.