Newcon Optik NVS 6 - Manual (Page 13)

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1.5 OPTICAL FUNCTIONS
NVS 6 assembly (the goggles) is an electro-optical system
consisting of two monoculars with identical optical terrains and
functions (Fig.1-6). Each monocular has an objective lens, an
image intensifier assembly and an eyepiece lens.
The objective lens collects the ambient light reflected from the
scene by the moon, stars, or night sky glow, inverts the image
and then focuses the image on the image intensifier. Inside the
image intensifier, a photocathode converts the light into
electrons; a micro channel plate amplifies the electrons image
resulting in the electron striking a phosphor screen.
The phosphor screen creates a visible image, which in turn is re-
inverted by fiber optics and transmits to the eyepiece, where the
operator can see the intensified image in its proper 1:1
perspective (unity magnification).