Miniaturized optical fingerprint scanner incorporating an integrated encoding plate

A compact optical fingerprint scanner (FPS) without a lens has been proposed and demonstrated using a plastic encoding plate that integrates an input and output routing mirror in conjunction with a platen. A beam originating from a vertical cavity surface emitting laser is projected toward the plate...

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Bibliographic Details
Published inMicrowave and optical technology letters Vol. 60; no. 1; pp. 122 - 126
Main Authors Lee, Yong‐Geon, Baek, Seon‐U., Lee, Sang‐Shin, Son, Geun‐Sik
Format Journal Article
LanguageEnglish
Published New York Wiley Subscription Services, Inc 01.01.2018
Subjects
Coding
fingerprint scanner
Fingerprinting
Fingerprints
Laser beams
optical device
Ridges
Scanners
Sweat
total internal reflection
Valleys
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Summary:A compact optical fingerprint scanner (FPS) without a lens has been proposed and demonstrated using a plastic encoding plate that integrates an input and output routing mirror in conjunction with a platen. A beam originating from a vertical cavity surface emitting laser is projected toward the platen through the input routing mirror. Considering that the total internal reflection is inhibited at the ridges but takes place at the valleys, the projected beam can be spatially modulated by placing a fingerprint on the platen. The proposed FPS has been designed via ray‐optic simulations and was then constructed by creating an integrated encoding plate. The scanner could manifest the sweat glands of the ridges for an actual fingerprint.
Bibliography:Funding information
National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIP) (No. 2016R1A2B2010170).
ISSN:0895-2477
1098-2760
DOI:10.1002/mop.30935