A Comparison of Fingerprint Scanners
In the business and law enforcement worlds, properly identifying individuals is an important part of being successful. Using a fingerprint scanner is one way to make sure that you are dealing with the correct person at all times. While all fingerprint scanners do the same job, different types of fingerprint scanners are available.
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Thermal Fingerprint Scanners
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The thermal fingerprint scanner is one that utilizes the heat signature of the finger to create a fingerprint. When a finger is pressed on the scanner, the body heat of the finger is measured down to the individual ridges on the finger. The fingerprint also measures the lower temperatures in the valleys of the finger. From these detailed heat measurements, and images created in much the same way as using an infrared camera to produce a picture.
Optical Fingerprint Scanners
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Another type of fingerprint scanner that some businesses and law enforcement agencies use is the optical scanner. The optical scanner uses an LED or light-emitting diode to light up the finger when placed on the surface. The scanner then uses very sensitive sensors to tell where the fingerprint has darker areas. This type of fingerprint scanner can be effective, except that it is often susceptible to issues when other light sources are present in the room at the time of the image scan.
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Capacitive Fingerprint Scanners
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Capacitive fingerprint scanners are another type of scanner that can provide a fingerprint image for verification purposes. This type of scanner uses a small electrical charge to create an image of the fingerprint. Each individual ridge on the fingerprint acts as a small conductor and allows the electrical charge to create the image of the fingerprint. This is one of the more accurate types of fingerprint scanners available because it is not susceptible to light or other malfunctions.
Radio Frequency
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Another type of fingerprint scanner uses a radio frequency to scan the fingerprint. With this process, a small radio signal is sent over the finger and then the fingerprint scanner reads the frequency. This helps it create an image in a similar fashion to sonar. One of the benefits of using this option is that it reads the fingerprint from under the top layer of skin. This helps it avoid any problems with dead skin cells or the top layer of skin in general.
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