FIELD: instrument making.
SUBSTANCE: invention is related to the field of biometric personal authentication. Device comprises the following components that are serially installed and optically connected to each other - source of radiation, optically transparent base soaked with optically transparent liquid and intended for location on perceiving surface of body part base with papillary lines, and receiver of radiation, which is electrically connected to unit of image processing. Angle of radiation drop from source of radiation onto perceiving surface is selected within the limits of angle of complete internal reflection at interphase border "perceiving surface - liquid" to the angle of complete internal reflection at interphase border "perceiving surface - skin". On perceiving surface of the base there is a deepening filled with optically transparent liquid. Moreover, linear size of deepening corresponds to linear size of body part.
EFFECT: use of this device makes it possible to obtain high-quality high-contrast images of palm or finger prints for both dry and wet skin
4 dwg
| Title | Year | Author | Number |
|---|---|---|---|
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|
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RU2306602C1 |
| DEVICE FOR REGISTRATION OF PAPILLARY PATTERN | 2005 |
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RU2350266C2 |
| FINGERPRINT DETECTOR | 2008 |
|
RU2371091C1 |
