Night Sight Functional Groups.
The night sight is effectively three functional groups (Figure 1-6):
optical, electronic, and mechanical.
Optical Functions:
Collect infrared energy.
Focus infrared energy on the detectors.
Image visible light.
Display real time scene through the eyepiece.
Electronic Function:
Provide
signals to drive the scanning mechanism.
Provide
signals to the detectors.
Convert
the incoming IR energy to video signals.
Convert
video signals to a visual display.
Process
the video signals.
Switch lens for different fields-of-view.
Secure the night sight to the mounting fixture.
Prevent the escape of stray light from the eyepiece.
Allow target image to be focused.
Figure 1-6.
Night Sight Functional Groups.
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MM4812
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