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词汇 Pickup tube
分类 英语词汇 英语翻译词典
释义

Pickup tube

中文百科

摄像管 Video camera tube

(重定向自Pickup tube)
17mm光导摄象管
正析象管结构示意图
Farnsworth image dissector tube from 1931
Zworykin holding iconoscope tube

摄像管是电荷耦合组件(CCD)出现之前的一类用于摄像的阴极射线管(CRT)。摄像管有几种不同的结构,常见于二十世纪三十年代到八十年代期间。

摄像管的核心原理是用被偏转的阴极射线扫描受光辐射而成像的靶,最终将光信号转变为与入射光强度相关的电信号。

英语百科

Video camera tube 摄像管

(重定向自Pickup tube)
vidicon tube (2/3 inch in diameter)
Farnsworth image dissector tube from 1931
Zworykin holding iconoscope tube
Schematic of image orthicon tube

The video camera tube was a type of cathode ray tube used to capture the television image prior to the introduction of charge-coupled devices (CCDs) in the 1980s. Several different types of tubes were in use from the early 1930s to the 1980s.

In these tubes, the cathode ray was scanned across an image of the scene to be broadcast. The resultant current was dependent on the brightness of the image on the target. The size of the striking ray was tiny compared to the size of the target, allowing 483 horizontal scan lines per image in the NTSC format, or 576 lines in PAL.

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