Focal Length - Bosch AVIOTEC IPSTARLIGHT 8000 Operation Manual

AVIOTEC IP starlight 8000
Sales room
Office space
In general a well illuminated monitoring area is advantageous for the video-based fire
detection. Backlight should be avoided.
2.4.2

Focal length

The focal length of an optical system defines the distance between a light refracting lense and
the focal point. Field of view, maximum distance and field angle are dependant as shown in
the graphic below.
The maximum width of the field of view may be realized by the minimum focal length. This
adversely affects the maximum distance to a detectable fire (red).
The maximum distance to a detectable fire may be reached by adjusting the largest focal
length which decreases the width of the field of view to the minimum (green).
Bosch Sicherheitssysteme GmbH
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Operation manual
Introduction | en 9
2017.06 | 6.0 | F.01U.318.200