Short Distance Fingerprint Capturing System by Lateral Waveguide Backlighting
A new imaging system for fingerprint capturing with the thin waveguide as lateral backlighting was proposed.A microlens array was employed in order to complete fingerprint capturing in a comparatively short distance.In order to prohibit the image crosstalk by different microlens and eliminate the use of the separator in the TOMBO system,the object distance is set according to the demagnification ratio.Thus,the length of the whole imaging system is shortened by a combination of the short focus imaging component and the thin backlighting module.When waveguided light encountered the ridges of the fingerprint pattern on the waveguide,part of light would be scattered and they appear as the bright fringes in the resulted images by the microlens array.The regular pattern can be used to test the ability of system.The resulted whole image contains an array of the fingerprint image,which could be combined to provide more details of the fingerprint.
Jian-du Zhang Tian-chi Yang Wen Qiao Wen-qiang Wan Lin-sen Chen Wen-bin Huang
University of Soochow,Suzhou China
国际会议
上海
英文
180-186
2017-12-30（万方平台首次上网日期，不代表论文的发表时间）