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FingerTip

FingerTip is the Siemens-protected name for a fingerprint scanner for fingerprintidentification. The FingerTip is a Siemens development based on a capacitive process in which a high- performance sensor measures the capacitance distribution of the resting fingertip in a narrow grid.

When a finger is placed on the sensor, the charge pattern of the papillary lines is created by different feedback capacitances with the individual sensor elements. A processor uses this structure to calculate the characteristic features of the fingerprint using a biometric method.

FingerTip sensor on a smart card, photo: Siemens

FingerTip sensor on a smart card, photo: Siemens

The high-performance sensor operates at a resolution of over 500 dpi, i.e. about 20 pixels per mm, an image size of 220 x 280 pixels and an information depth of 8 bits per pixel.

Capacitive high-performance fingerprint sensor, Photo: Siemens

Capacitive high-performance fingerprint sensor, Photo: Siemens

The capacitively operating finger chip can be easily accommodated in keyboards, notebooks or cell phones. In practical use, a fingerprint is stored for access authorization and compared with the current measurement result entered for the access request. If the identification is positive, the appropriate actions are initiated: Access provided, safe opened, a computer or personal computer( PC) activated via the FingerTip mouse or keyboard, etc.

Informations:
Englisch: FingerTip
Updated at: 25.09.2007
#Words: 190
Links: name, fingerprint scanner, process, performance, sensor
Translations: DE
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