![](http://www.alamy.com/thumbs/6/CDFC67B4-010E-4E6A-95ED-29A74315067F/2ADH3T6.jpg)
Photograph of man next to tree obtained using an image intensifier in very low light conditions. Image Intensifiers typically have a light amplificati
Photograph of man next to tree obtained using an image intensifier in very low light conditions. Image Intensifiers typically have a light amplification capability of 50, 000 x to 250,000 x the original light intensity of a scene. These instruments use the visible spectrum, and a small part of the near infra- red for detection. The incoming photons strike a photo cathode which produces an electron emission. The electrons are then amplified using a micro-channel plate and then focused onto a luminescent screen via an electron lens. This screen reconverts the electron signal into light which is bright enough to observe.
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Photo credit: © Science Photo Library / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: image, intensifier, night, photography, science, scientific, technique, techniques, technology, vision