television-camera tube
Học thuậtThân thiện
Definition
Noun: A television-camera tube is a specialized electronic vacuum tube that captures an optical image and rapidly converts it into a sequence of electronic signals suitable for television transmission or recording.
Usage
The term television-camera tube refers specifically to the imaging component in older television cameras. It describes the technology that was fundamental to electronic television before the widespread adoption of solid-state image sensors like CCDs and CMOS sensors.
Examples
- The early studio cameras used a large television-camera tube known as an image orthicon.
- The quality of the broadcast depended heavily on the sensitivity of the television-camera tube.
- Modern digital cameras do not contain a television-camera tube; they use a silicon image sensor.
Advanced Usage
- Technical Context: In technical descriptions, the term specifies the type of tube, such as a or , which are specific kinds of television-camera tubes.
- Example: The plumbicon, a lead-oxide television-camera tube, was prized for its high picture quality and was widely used in broadcast television.
Variants and Related Words
- Camera tube: A common shortened form of television-camera tube.
- Pickup tube: Another synonym for television-camera tube.
- Imaging tube: A more general term that can include television-camera tubes and other types.
- Image sensor / CCD / CMOS: These are the modern solid-state components that have functionally replaced the television-camera tube.
Synonyms
- Pickup tube
- Camera tube
- Imaging tube (in the context of television)
Notes on Meaning
This term is primarily historical and technical. It refers to a specific, now largely obsolete, piece of technology. In contemporary discussion about cameras, the component that performs the image conversion is simply called an image sensor.
Noun
- a tube that rapidly scans an optical image and converts it into electronic signals