Optical design of high performance fingerprint scanner with large capture size

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2012,（12）
• 页码范围: 60-63
• 页数: 4页
• 语种: 英文
• DOI: 10.3788/COL201210.122201

摘要

We present an optical design for a fingerprint scanner that addresses the challenges involved in capturing the prints of rolling fingers.A rolling fingerprint scanner requires a high performance distortion free system with big object space numerical aperture (0.022) and larger capture size (40 × 40 (mm)).We show how these requiremeuts can be achieved with the approach of optical and comnputational hybrid distortion correction.In addition,dark background illumination is utilized to increase fingerprint contrast.