EOTech MIPIM (AN/PEQ-16B) - Mini Integrated Pointer Illuminator Module - Manual (Page 45)

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2.8 USING THE LASERS
Laser modes of operation are selected and activated as
described in section 2.7.
Illuminator Beam Size
The IR illumination beam may be varied from flood to spot by
rotating the Illuminator Focus Knob as shown in Figure 2-9.
Figure 2-9 IR Illuminator Focus Knob
SPOT
FLOOD