Apogee Instruments SIF-111, Руководство пользователя

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Field of View
The field of view (FOV) is reported as the half-angle of the apex of the cone formed by the target surface (cone
base) and the detector (cone apex), as shown below, where the target is defined as a circle from which 98 % of the
radiation detected by the radiometer is emitted.
Sensor FOV, distance to target, and sensor mounting angle in relation to the target will determine target area.
Different mounting geometries (distance and angle combinations) produce different target shapes and areas, as
shown below.
CIRCULAR HORIZONTAL
FOV Area (m²) Half Angle FOV Area (m²)
Type Model Half Angle 0 Deg 45 Deg 60 Deg Type Model Horizontal Vertical 0 Deg 45 Deg 60 Deg
Standard SI-111 22° 2.069 7.627 45.211 Standard SI-1H1 32° 13° 2.276 7.148 45.512
Narrow SI-121 18° 1.337 4.461 18.865 Narrow SI-4HR 16° 5° 0.403 1.15 3.341
Ultra-Narrow SI-131 14° 0.787 2.447 8.544
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A simple FOV calculator for determining target dimensions based on infrared radiometer model, mounting height,
and mounting angle, is available on the Apogee website:
https://www.apogeeinstruments.com/irr-calculators .