A rectangular-FOI infrared lighting system with compact size, high uniformity, and high efficiency for palm recognition

Weibiao Zhou; Kai Xia; Runzeng Guo; Shiyou Sun; Bincheng Mo; Changze Xiao; Shaoming Wang; Jiayu Huang; Ruibin Huang; Zhibin Li; Fanglu Lyu

doi:10.1117/12.2688031

6 November 2023 A rectangular-FOI infrared lighting system with compact size, high uniformity, and high efficiency for palm recognition

Weibiao Zhou, Kai Xia, Runzeng Guo, Shiyou Sun, Bincheng Mo, Changze Xiao, Shaoming Wang, Jiayu Huang, Ruibin Huang, Zhibin Li, Fanglu Lyu

Author Affiliations +

Proceedings Volume 12921, Third International Computing Imaging Conference (CITA 2023); 129210P (2023) https://doi.org/10.1117/12.2688031
Event: Third International Computing Imaging Conference (CITA 2023), 2023, Sydney, Australia

Abstract

The existing palm vein recognition equipment cannot fully illuminate the palm at the near end (30 mm), and the illumination is low at the far end (120 mm), it is challenging for the poor palm vein images to meet the financial grade biometric accuracy requirements. This is due to the specification limitation of the lighting system components. We propose a compact rectangular-FOI infrared lighting system for palm-print and palm vein recognition with high uniformity and high efficiency. This ultra-short-distance (30 mm) lighting solution achieved a 200% increase in system efficiency, with illuminance uniformity of over 60% at the near end and over 90% at the far end. We have developed a novel LED component and a light distribution lampshade with multiple refractive index resins, according to the inverse square law of light, reduce the center illuminance and enhance the illuminance of the edge area at the target projection plane. It supports a broader working distance range for palm recognition, offers a more simplified design, and provides a more natural user experience. The proposed system is endowed with three significant advantages. Firstly, it matches the lighting FOI with the camera FOV to increase efficiency. Secondly, it provides high illuminance uniformity with fewer lighting components, eliminating the need for complex lighting layouts. Thirdly, it avoids the utilization of diffuse materials for enhancing uniformity, which would otherwise result in reduced light transmittance. The simplified lighting source layout, which requires only two or even one component, significantly reduces system design difficulty.

Citation Download Citation

Weibiao Zhou, Kai Xia, Runzeng Guo, Shiyou Sun, Bincheng Mo, Changze Xiao, Shaoming Wang, Jiayu Huang, Ruibin Huang, Zhibin Li, and Fanglu Lyu "A rectangular-FOI infrared lighting system with compact size, high uniformity, and high efficiency for palm recognition", Proc. SPIE 12921, Third International Computing Imaging Conference (CITA 2023), 129210P (6 November 2023); https://doi.org/10.1117/12.2688031

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
7 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Light sources and illumination

Light emitting diodes

LED lighting

Veins

Infrared imaging

Cameras

Infrared radiation

Show All Keywords

Keywords/Phrases

Search In:

Publication Years