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单词 mirror drum
释义

Definition of mirror drum in English:

mirror drum

noun
  • A scanning device, first used in early television transmitters and receivers, consisting of a rotating drum having its curved surface covered with a number of equally spaced plane mirrors, the number of mirrors determining the number of scanning lines in the picture.

Origin

1920s; earliest use found in Wireless World.

 
 

Definition of mirror drum in US English:

mirror drum

noun
  • A scanning device, first used in early television transmitters and receivers, consisting of a rotating drum having its curved surface covered with a number of equally spaced plane mirrors, the number of mirrors determining the number of scanning lines in the picture.

Origin

1920s; earliest use found in Wireless World.

 
 
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更新时间:2024/12/23 17:46:59