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Raynger 3i Series Operator’s Manual 2-31
2.7.1 Single Laser Sighting
A single laser unit (see Figure 2-14) indicates the center of the area being measured,
not the diameter of the spot. (To find out the diameter of the spot being measured,
refer to the optical charts in Appendix A.)
2.7.2 Dual Laser Sighting
A dual laser unit indicates the diameter of the spot being measured. To take a mea-
surement, aim the unit at the target and move closer or farther until the target is with-
in the laser dots.
Note: The IR and laser spot diameters are not the same at close distances. The distance
between the laser beams is slightly greater than the spot being measured. Refer to
Figure 2-15 for a comparison of the IR spot and laser beam diameters.
0
02
4
0
8
12
16
300
225
150
75
10 20 30 40 50
4 6 8 10 12 14 16
SPOT DIA. (in)
SPOT DIA. (mm)
DISTANCE: SENSOR TO OBJECT (m)
DISTANCE: SENSOR TO OBJECT (ft)
Dual Laser Focus Point D:S = 75:1 @ 15 m (50 ft) Far Field D:S = 68:1
IR
LASER
IR Spot Diameter at Lens = 23 mm (0.9 in)
Laser Diameter at Lens = 40 mm (1.6 in)
Figure 2-15: Dual Laser and IR Spot Diameters
Figure 2-14: Single Laser Sighting