摘要
多指指纹采集仪是一种大视场、高分辨率的指纹采集设备,它代表了生物特征识别领域的发展方向,其核心技术是高分辨率光学系统的设计。对采用“独立镜头”、“两组远心”、“单片前组和独立镜头组合”三种方案进行的设计进行了比较,指出了各种方案的优缺点。其中单片前组和独立镜头组合的方案在150 lp/mm的传递函数>0.6,采用该方案的实验样机取得了良好的图像。
Multi-finger fingerprint scanner is a high-resolution fingerprint capture device with big Field of View（FOV）, it represents the developing trend of the biometric identification area. For the key technology of this device, the optical system design, this paper presents three types of optical design methods, they are separate lens, two group telecentric system and one singlelet with separate lens system, the advantages and disadvantages of each design are discussed and compared, it is found that the MTF of singlelet with separate lens system is larger than 0.6 in 150 lp/mm,also prototype of this design obtains a image in good quality.
出处
《光学精密工程》
EI
CAS
CSCD
北大核心
2006年第6期955-958,共4页
Optics and Precision Engineering
关键词
多指指纹采集仪
光学系统设计
生物特征识别
multi-finger fingerprint scanner
optical system design
biometric identification
