Fingerprint reading devices measure the distance of these indentations and protrusions on our fingers to each other and create an encryption algorithm by detecting the distance of points found on our fingerprint to each other. When our fingerprint is re-read to the fingerprint reading device, the matching process is performed by looking at the records taken to the encryption algorithm inside the device, and the fingerprint recognition process is completed. There are also 3 kinds of fingerprint system widely used.
Optical fingerprint reading: in an optical fingerprint system, it is a system obtained by taking a digital image of the fingerprint with the help of light. In this system, the sensor is located on a glass-covered screen and the fingerprint is converted to a numerical value by the reflection of light in.
Ultrasonic fingerprint reading: in this system, the fingerprint reading process is performed by penetrating the epidermal area of the skin with the help of high sound waves, not superficial as in optical sensors.
Capacitive fingerprint reading: capacitive sensors have two rows of sensor arrays inside the device. During the reading process, the dermal section of the finger acts as a conductive, and the epidermal section acts as an insulating area, and a digital image of the fingerprint is obtained according to the capacity value generated during touch.