magic eye
Definition
Noun: 1. A type of vacuum tube indicator: A "magic eye" is a specialized electronic component, formally called an electron-ray indicator tube. It provides a visual indication, typically of a signal's strength or a system's tuning, by displaying a moving shadow on a fluorescent screen. It was commonly used in mid-20th-century radio receivers and audio equipment.
Usage
The term "magic eye" is a historical and colloquial name for a specific electronic device. It is used to describe the component itself or its function within a circuit. * The old radio uses a magic eye tube to show when the station is perfectly tuned. * Restorers often need to replace the magic eye in vintage audio amplifiers.
Advanced Usage
- As a visual metaphor: In historical or technical discussions, "magic eye" can be used metaphorically to describe any simple, intuitive visual indicator.
- The gauge's magic eye gave the pilot an immediate, unambiguous reading.
Variants and Related Words
- Tuning indicator: A more formal, descriptive term for the same device.
- Electron-ray tube: The technical name for the type of vacuum tube.
- Cat's eye: A less common alternative nickname, referring to the similar appearance.
Synonyms
- Visual indicator
- Tuning meter (for its common function)
Related Phrases
- Magic eye tube: The full, most common compound term specifying the component type.
Noun
-
a transducer used to detect and measure light and other radiations
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