6-3
Installation Conditions and Method
6
[2] Illuminance and shutter speed
The illuminance provided by the lighting equipment and the shutter speed must be set within the
proper range.
- The following graph shows the relation between illuminance and shutter speed for the IV-S20L16
camera lens (focal length 16 mm) with an aperture setting of f = 1.6.
Determine the proper amount of illuminance and the correct shutter speed, by referring to this
graph. Adjust the aperture as necessary.
- To measure a moving object, or to increase the image processing speed, set the shutter speed to 1/
1000 sec. or 1/2000 sec. or faster. However, an extremely high shutter speed will require intense
lighting, thereby increasing the cost.
Illuminance (lux)
32000
16000
8000
4000
2000
1000
500
250
125
1/30 1/60 1/125 1/250 1/500
Relation between illuminance and shutter speed [IV-S20L16 camera lens
(focal length 16 mm) with an aperture setting of f = 1.6]
1/1000 1/2000 1/4000 1/10000
Shutter speed sec.
Proper range
(shaded zone)
- The standard relationship between illuminance and shutter speed is given above for
reference. When actually installing the equipment, make sure the proper combination is used
for the actual system.
Note
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