User's Manual

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Appendix Ⅳ Direct Sunlight problems
How to improve decreased recognition rate due to direct
sunlight
1) Why direct sunlight should be blocked during
fingerprint authentication
Like a camera, the fingerprint recognition device captures an
image. If there is a large amount of light, the image gets darker
and becomes hard to recognize.
Unlike a camera, the device not have a shutter or an iris. So you
should block direct sunlight yourself.
2) Where to install
As all our products are optical products that can be affected by
direct sunlight, avoid the following places when you install.
① Next to the window likely to get direct sunlight
② Outdoors where there is no awning
3) How to improve recognition rate in case direct sunlight
cannot be avoided
① Stand with the sun behind your back.
(As shown in the figure, use your body to block direct sunlight.)