Instruction Manual

IS 12 AI & IS 12-AI/S Controls and Installation  17
Calculating the spot sizes on different measuring distances:
The table above specifies, for each optic, the
smallest spot size in a certain distance. Spot
sizes for other measuring distances can be
calculated with the following equations or
with the Spot Size Calculator of the
InfraWin software.
Table values: a
1
= measuring distance
M
1
= spot size
D = aperture