M931 Ranging Night Scope (RNS)

AIM-1DLR Laser Aiming Device The AIM-1DLR, illustrated in figure 2-13, is a weapon-mountable aiming device with an adjustable-intensity beam used as a long range pointer. This unit can operate with any type of night vision system. This unit is a Class 3B laser with a range of 3000 meters and weighs only 9 ounces. It is powered by two BA 3058 “AA” alkaline batteries. Safety eyewear for this unit must have an OD of 1.67 at a wavelength of 840 nano-meters. The note preceding this section also applies to the AIM- 1DLR. RANGEFINDERS Rangefinders are devices that are used to find a close estimate of the distance to a target quickly. AN/PVS-X Miniature Laser Range Finder (MLRF) The AN/PVS-X, illustrated in figure 2-14, is a small, man-portable, lightweight, hand-held unit used to obtain a close estimate of the range to a target. The AN/PVS-X MLRF is a Class 3B laser that weighs 2.5 pounds and has a range of 50 meters to 10 kilometers, with a 7-degree field of view. It can be powered by either four BA 5567 lithium or four BA 1567 Mercury or a battery pack containing eight BA 3058 “AA” alkaline batteries. Safety eyewear for this unit must have an OD of 3.7 at a wavelength of 1064 nano-meters. M931 Ranging Night Scope (RNS) The M931 RNS, illustrated in figure 2-15, is a man-portable, lightweight, hand-held or tripod- mounted laser device. It is used to obtain a close estimate of range to a target under starlit or moonlit conditions. The M931 is a Class 3B laser with a 13.6-degree field of view and a range of 1 kilometer. It weighs 2.9 pounds and is powered by four “AA” 3.5-volt lithium batteries. Safety eyewear for the M931 must have an OD of 1 at a wavelength of 830 nano-meters. THERMAL IMAGING Thermal imaging is a process by which heat emissions (infrared energy) are converted to visible light. Thermal imaging devices detect and display changes in the heat emissions of objects. 162.1 Figure 2-13.—AIM-1DLR laser aiming device. 2-8