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3 / 192018-08-16 | Document No.: AN097
In general, an iris recognition system consists of only a few components (see
Figure 1):
• Illumination module, containing the SFH 4780S
• Camera (including the image sensor and the lens)
• Optical bandpass filter in front of the camera to increase the signal-to-noise
ratio in high brightness environments
• Software algorithm including pattern extraction
As everything can be mounted behind a glass cover it results in a very rugged
system with a small footprint (compared to e.g. the size of a fingerprint ID
sensor). The optical system is the heart of the hardware. Using the right emitter
is especially important as it defines the quality of the obtained iris scan data.
Figure 1: System setup and the required hardware components for an iris recognition
system
typ. 20 cm - 40 cm
Cover glass
Lens
Optical
bandpass filter
Imager
IRIS
scan
camera
Software
incl. data processing
SFH 4780
Light
barrier