公开(公告)号：US4358677A

公开(公告)日：1982-11-09

申请号：US152513

申请日：1980-05-22

申请人： Hartwig Ruell ,  Wolfgang Feix

发明人： Hartwig Ruell ,  Wolfgang Feix

IPC分类号： A61B5/117 ,  G06K9/00 ,  H01J3/14

CPC分类号： G06K9/00013 ,  A61B5/1172

摘要： The fingerprint transducer contains a sensing member having a sensing surface for receiving a fingerprint. The sensing member is made of a material which has a transition or softening temperature that is higher than ambient temperature and close to the temperature of the finger. Particularly, the softening temperature is chosen such that the material of the sensing member will start to melt on the surface when the finger is pressed against the sensing surface. The sensing surface has a surface relief of random roughness. In other words, the sensing surface has variations in elevation which do not show a specific pattern. The method for analyzing fingerprints comprises the steps of generating a surface relief of random space on a sensing surface of a sensing member, generating the fingerprint on the sensing surface by pressing a finger thereto, and optically reading the fingerprint from the sensing surface.

摘要翻译： 指纹传感器包含感测构件，其具有用于接收指纹的感测表面。 感测构件由具有高于环境温度并且接近手指温度的转变或软化温度的材料制成。 特别地，软化温度被选择为使得当手指被压靠在感测表面上时感测构件的材料将在表面上开始熔化。 感测表面具有随机粗糙度的表面浮雕。 换句话说，感测表面具有不显示特定图案的高度变化。 用于分析指纹的方法包括以下步骤：在感测构件的感测表面上产生随机空间的表面浮雕，通过将手指按压在手指上，在感测表面上产生指纹，并从感测表面光学读取指纹。