700-RAOS-Man Rev 5 24 Feb 2020
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Figure 1-6: Distance vs Exposure infrared radiation eye safety
1.10.1
NIGHT MODE VS INFRARED MODE
The Panorama camera uses an IR cut filter during the day. This filter allows light from the visible
spectrum through, but prevents light from the IR spectrum from reaching the camera’s image
sensor. This prevents the colour distortion of the captured images due to the presence of IR light.
The images will appear as the human eye sees them. At night or low light conditions, the Panorama
camera automatically retracts the IR cut filter, permitting both the visible and infrared light to be
used to produce high quality monochromatic images.
The Infrared camera shifts between day and night mode automatically based on lighting conditions.
When the Infrared camera is in IR mode, it uses an infrared pass filter which only allows light from
the near IR spectrum through, blocking light from the visible spectrum. This permits higher contrast,
more detailed monochromatic images of thermal radiation than is seen by the Panorama camera.
This feature makes the Infrared camera ideally suited for perceiving and monitoring fires and hot
spots at night.
The thermal camera operates in a single mode, continuously detecting small differences in
temperature regardless of lighting conditions. They create images based on the heat radiating from
any object, so it is less sensitive to light conditions such as shadows, backlight and darkness.
