发明名称 |
Fingerprint image optical input apparatus |
摘要 |
A fingerprint optical input apparatus comprises a contact image sensor for viewing a moving finger and providing a high contrast image. A narrow strip of the fingerprint touching a transparent platen is illuminated by sheet of collimated light normal to or at an oblique angle to the surface. The fingerprint image is viewed at an oblique angle by partially scattered light or by frustrated total internal reflection by a GRIN rod lens array and projected onto a linear array sensor. Various embodiments of the platen provide a compact design by using TIR or mirror reflections of the fingerprint image.
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申请公布号 |
US6355937(B2) |
申请公布日期 |
2002.03.12 |
申请号 |
US20010833262 |
申请日期 |
2001.04.09 |
申请人 |
KINETIC SCIENCES INC. |
发明人 |
ANTONELLI KEITH;VANDERKOOY GEOFFREY;VLAAR TIMOTHY;IMMEGA GUY |
分类号 |
A61B5/117;G06K9/00;G06T1/00;H04N5/225;(IPC1-7):G06K9/00 |
主分类号 |
A61B5/117 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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