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The first commercially made electronic TV sets with cathode-ray tubes were manufactured by Telefunken in Germany in 1934. [ 32 ] [ 33 ] In 1947, the cathode-ray tube amusement device , the earliest known interactive electronic game as well as the first to incorporate a cathode-ray tube screen, was created.
About 8% by weight of cathode-ray tubes is strontium oxide, which has been the major use of strontium since 1970. [3] [4] Color televisions and other devices containing color cathode-ray tubes sold in the United States are required by law to use strontium in the faceplate to block X-ray emission (these X-ray emitting TVs are no longer in production).
Most of the world's production of strontium used to be consumed in the production of cathode-ray tube (CRT) displays. The glass contained strontium and barium oxide to block X-rays. Consuming 75% of production, the primary use for strontium was in glass for colour television cathode-ray tubes, [56] where it prevented X-ray emission.
Only one tube was used in the camera, instead of a tube for each color, as was standard for color cameras used in television broadcasting. It is used mostly in low-end consumer cameras, such as the HVC-2200 and HVC-2400 models, though Sony also used it in some moderate cost professional cameras in the 1970s and 1980s, such as the DXC-1600 series.
Yttrium Oxide is used to produce Yttrium Iron Garnets, which are very effective microwave filters. [13] It's also used to create red phosphors for LED screens and TV tubes, as well as in anti-reflective coatings to enhance light transmission. [14]
Terbium oxide is used in fluorescent lamps and television and monitor cathode-ray tubes (CRTs). Terbium green phosphors are combined with divalent europium blue phosphors and trivalent europium red phosphors to provide trichromatic lighting technology, a high-efficiency white light used in indoor lighting.
The red component of color television cathode ray tubes is typically emitted from an yttria (Y 2 O 3) or yttrium oxide sulfide (Y 2 O 2 S) host lattice doped with europium (III) cation (Eu 3+) phosphors. [15] [9] [i] The red color itself is emitted from the europium while the yttrium collects energy from the electron gun and passes it to the ...
Caesium oxide is used in photocathodes to detect infrared signals in devices such as image intensifiers, vacuum photodiodes, photomultipliers, and TV camera tubes [3] L. R. Koller described the first modern photoemissive surface in 1929–1930 as a layer of caesium on a layer of caesium oxide on a layer of silver. [4]