Why do optical fingerprint sensors use diodes?
Answers
Answered by
3
Answer:
Optical fingerprint scanners use a charge couple device, or CCD, similar to those found in a digital camera, to generate an image of your fingerprint. ... Light emitting diodes illuminate your finger, and light sensitive diodes on the surface of the CCD measure the intensity of the reflected light at many points.
Answered by
2
The way an optical scanner works is by shining a bright light over your fingerprint and taking a digital photo. The light-sensitive microchip makes the digital image by looking at the ridges and valleys of the fingerprint, turning them into 1's and 0's, and creates the user's own personal code.
Similar questions