There are several types of fingerprints.

There are three types of fingerprints.

1, there are three types of fingerprints, namely bow type, dustpan type, bucket type and fingerprint triangle (inside the circle). Bow: Bow is the ridge line from one side to the other, with no arc in the middle. Dustpan pattern: Dustpan pattern is that the ridge line originates from one side and the middle is curved to the originating side. Bucket pattern: Bucket pattern has spiral, concentric circle, hyperbola and other shapes.

Types 2 and 3 are subdivided into six subtypes, namely simple bow, tent bow, ruler basket, spoke basket, universal bucket and double skip. The types of fingerprint identification technology include capacitive fingerprint identification, optical fingerprint identification and ultrasonic fingerprint identification. Optical fingerprint identification is mainly realized by using the principle of reflection and refraction of light.