An electronic device in which an image formed by invisible radiation (usually gamma rays, X-rays, ultraviolet, or infrared) is converted into a visible image. Commonly the invisible radiation is focused on to a photocathode, which emits electrons when it is exposed to the radiation. These electrons fall on a fluorescent anode screen, after acceleration and focusing by a system of electron lenses. The fluorescent screen produces a visible image. The device is used in fluoroscopes, infrared telescopes, ultraviolet microscopes, and other devices.
An electron tube that converts an image outside the visible part of the spectrum, such as an infrared image, into a visible image. The ‘nonvisible’ image is focused on a photosensitive cathode and produces electrons. These are attracted to a positively charged fluorescent anode screen, and focused on it by an electron-lens system (see diagram). A visible image is produced on the screen. Image converters have many applications and are used in X-ray intensifiers, infrared telescopes and cameras, electron telescopes, and microscopes.
Image converter
- centre of calculation
- centre of curvature
- centre of gravity
- centre of inertia
- centre of mass
- centre of symmetry
- Centre Spatial Guyanais
- centre tap
- centric diatoms
- centric fusion
- centrifugal decanter
- centrifugal fan
- centrifugal force
- centrifugal forces
- centrifugal pump
- centrifuge
- centring
- centriole
- centripetal acceleration
- centripetal drainage
- centripetal drainage pattern
- centripetal force
- centripetal forces
- centroblast
- Centroceratida