Functional Description.
The night sight (Figure 1-7) receives heat emissions (IR energy) from
a target area, and converts the IR energy to electrical signals.
These signals are processed into video signals (video) and then to
visible light by the light-emitting diode (LED) array which displays
the visible light as a real-time scene for viewing by an observer.
The afocal assembly gathers IR energy and focuses it onto the
scan mirror.
The IR energy from the scan mirror is focused by the IR imager
optics onto the infrared detectors in the detector/Dewar
assembly.
The IR energy is converted by the detectors into video signals.
The video signals are processed by the video electronics and
then converted to visible light by the light emitting diodes in
the emitter assembly.
The visual collimator collimates the visible light onto the scan
mirror.
The objective lens/roof mirror assembly images the visible light
from the scan mirror onto the reticle for viewing through the
eye piece.
Figure 1-7.
Night Sight (AN/TAS-4A).
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MM4812
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