Night Sight Signal Path.
The night sight (Figure 2-3) is a passive device that receives
infrared energy from a target area.
The infrared (IR) energy is
converted to electrical signals and then to visible light.
The
visible light is then displayed as a real time image.
The night
sight does this as follows:
The afocal assembly optics gathers IR energy and focuses it onto
the the scan mirror.
The IR imager optics (optical imager) focuses the IR energy from
the scan mirror onto the infrared detectors in the
detector/Dewar assembly.
The IR energy is converted to video signals by the light
emitting detectors (LEDs). The video signals are processed by
the video electronics and then converted to visible light by the
emitter assembly.
The visual collimator alines the visible light from the emitter
assembly onto the scan mirror.
The objective lens/roof mirror assembly optics images this light
onto the display reticle for viewing through the eyepiece
optics.
Figure 2-3.
Night Sight Signal Path.
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MM4812
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