Beta 1760/IR1600 Manuel D'instructions page 22

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DISTANCE & SPOT SIZE
As the distance (D) from the object increases, the spot size (S) of the area measured by the unit
becomes.larger..The.relationship.between.distance.and.spot.size.is.below..The.focal.point.for.each.
unit is 914mm (36"). The spot sizes indicate 90% encircled energy.
Picture:.
MODEL:.1760/IR1600..
Distance (D) / to spot size (S)
MODEL:8858/8859
Distance(D) to Spot Size(S)
Fig.1
D:S=50:1
inch
1.2@60
0.72@36
0.24@12
6.0@300
18@900
30@1500
mm
D

Laser Beam
16mm
S
Sensor Beam