How FingerPrint Sensor Work?

The basic working principle of 

fingerprint scanner is start with by

capturing the pattern of Ridges and

Valleys on a finger.

The captured pattern is then

processed by the device pattern

matching software, which

compares it to the list of registered

fingreprints on a file. A successful match will grant the access.

Types Of Fingerprint Scanner?

1.Optical Scanner

Optical scanners use an LED light to

illuminate the finger. The sensor detects and creates the fingerprint

image by determining the light and

dark areas created by the fingerprint ridges.

2. Capacitive Scanner

Instead oflight, capacitive scanners

use electricity to determine fingerprint

patterns. Most of the phones with fingerprint scanners use capacitive sensors.

3.Ultrasonic Scanner

These scanners work via sound waves. The hardware is designed to

send out utrasonic pulses and measure how much bounces back.Ridges and valleys reflect sound

differently, which is how ultrasonic scanners are able to create a detailed 3D map of fingerprint patterns.

By-Vikash Bharal

Thank you