Figure 31 Image taken against light
Flicker
In some occasions a bright fluorescent light may cause flicker in the viewfinder and captured image. This
phenomenon may also be a result, if images are taken indoors under the mismatch of 50/60 Hz electricity
network frequency. The electricity frequency used is automatically detected by the camera module. In some
very few countries, both 50 and 60 Hz networks are present and thus probability for the phenomenon
increases. Flickering occurs also under high artificial illumination level. Flickering only occurs when the rolling
shutter is used. This is normal behaviour; do not change the camera module.
Figure 32 Flicker in an image; object illuminated by strong fluorescent light
Bright light outside of image view
Especially the sun can cause clearly visible lens glare phenomenon and poor contrast in images. This happens
because of undesired reflections inside the camera optics. Generally this kind of reflections are common in
all optical systems. This is normal behaviour; do not change the camera module.
RM-626
Camera Module Troubleshooting
Page 5 – 8
COMPANY CONFIDENTIAL
Issue 1
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