point image - определение. Что такое point image
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Что (кто) такое point image - определение

VACUUM TUBE DEVICE FOR INCREASING THE INTENSITY OF AVAILABLE LIGHT
Image intensifiers; Image intensification; Image intensifier tube; Image amplifier
  • Photons from a low-light source enter the objective lens (on the left) and strike the photocathode (gray plate). The photocathode (which is negatively biased) releases electrons which are accelerated to the higher-voltage microchannel plate (red). Each electron causes multiple electrons to be released from the microchannel plate. The electrons are drawn to the higher-voltage phosphor screen (green). Electrons that strike the phosphor screen cause the phosphor to produce photons of light viewable through the eyepiece lenses.

Focus (optics)         
  • Text on a page that is partially in focus, but mostly not in varying degrees
  • A demonstration of camera focus on different distances, showing a bamboo rooftop
POINT WHERE PARALLEL LIGHT RAYS OR LIGHT RAYS ORIGINATING FROM A POINT WILL CONVERGE
Principal focus; Focal point (optics); In focus; Optical focus; Focus point; Focus level; Focal blur; Focus levels; Fixation point; Principle focus; Camera focus; Image point; Image focus; Distinct base
In geometrical optics, a focus, also called an image point, is a point where light rays originating from a point on the object converge. Although the focus is conceptually a point, physically the focus has a spatial extent, called the blur circle.
Image viewer         
  • 307x307px
COMPUTER PROGRAM THAT CAN DISPLAY STORED GRAPHICAL IMAGES
Image viewers; Image browser; Image browsing; Image Viewer; Picture viewer
An image viewer or image browser is a computer program that can display stored graphical images; it can often handle various graphics file formats. Such software usually renders the image according to properties of the display such as color depth, display resolution, and color profile.
The Image (1969 film)         
1969 FILM BY MICHAEL ARMSTRONG
The Image (short film)
The Image is a 1969 black and white short film directed by Michael Armstrong with starring Michael Byrne and David Bowie in his first film role. The film is one of the few short films ever to receive a certified 'X' Rating and it gained this rating due to its violent content.

Википедия

Image intensifier

An image intensifier or image intensifier tube is a vacuum tube device for increasing the intensity of available light in an optical system to allow use under low-light conditions, such as at night, to facilitate visual imaging of low-light processes, such as fluorescence of materials in X-rays or gamma rays (X-ray image intensifier), or for conversion of non-visible light sources, such as near-infrared or short wave infrared to visible. They operate by converting photons of light into electrons, amplifying the electrons (usually with a microchannel plate), and then converting the amplified electrons back into photons for viewing. They are used in devices such as night-vision goggles.