Imaging and confocal systems for in vivo measurements of human-iris spectral reflectance

Yi Chun Chen; Chong Jhih Jiang; Jian Siang Huang; Szu Yu Chen; Ching Cherng Sun

doi:10.1109/JDT.2014.2311439

Imaging and confocal systems for in vivo measurements of human-iris spectral reflectance

Yi Chun Chen, Chong Jhih Jiang, Jian Siang Huang, Szu Yu Chen, Ching Cherng Sun

Research output: Contribution to journal › Article › peer-review

Abstract

Two experimental configurations, an imaging system and a confocal system, are constructed to measure the spectral reflectance of human irises in vivo. The light from a white light-emitting diode (LED) is focused on the iris and the reflected light is measured by a spectrometer. A flat plate coated with barium sulphate Ba₂ SO₄ with reflectance 0.99 for visible light is used as a reference to calibrate the system. Samples of gray-blue and black-brown eyes are measured to compare the performance of the two systems. The differences between the reflectance spectra of the two systems show that Fresnel reflection from the interface between air and cornea is the dominating effect. The spatial filtering characteristic of the confocal system provides a nice capability in eliminating the contribution of cornea reflectance.

Original language	English
Article number	6766763
Pages (from-to)	595-600
Number of pages	6
Journal	IEEE/OSA Journal of Display Technology
Volume	10
Issue number	7
DOIs	https://doi.org/10.1109/JDT.2014.2311439
State	Published - Jul 2014

Keywords

Confocal system
human iris
imaging system
spectral reflectance

Access to Document

10.1109/JDT.2014.2311439

Cite this

@article{30e51214d1804988bf2465cf622fdf30,

title = "Imaging and confocal systems for in vivo measurements of human-iris spectral reflectance",

abstract = "Two experimental configurations, an imaging system and a confocal system, are constructed to measure the spectral reflectance of human irises in vivo. The light from a white light-emitting diode (LED) is focused on the iris and the reflected light is measured by a spectrometer. A flat plate coated with barium sulphate Ba2 SO4 with reflectance 0.99 for visible light is used as a reference to calibrate the system. Samples of gray-blue and black-brown eyes are measured to compare the performance of the two systems. The differences between the reflectance spectra of the two systems show that Fresnel reflection from the interface between air and cornea is the dominating effect. The spatial filtering characteristic of the confocal system provides a nice capability in eliminating the contribution of cornea reflectance.",

keywords = "Confocal system, human iris, imaging system, spectral reflectance",

author = "Chen, {Yi Chun} and Jiang, {Chong Jhih} and Huang, {Jian Siang} and Chen, {Szu Yu} and Sun, {Ching Cherng}",

year = "2014",

month = jul,

doi = "10.1109/JDT.2014.2311439",

language = "???core.languages.en_GB???",

volume = "10",

pages = "595--600",

journal = "IEEE/OSA Journal of Display Technology",

issn = "1551-319X",

number = "7",

}

TY - JOUR

T1 - Imaging and confocal systems for in vivo measurements of human-iris spectral reflectance

AU - Chen, Yi Chun

AU - Jiang, Chong Jhih

AU - Huang, Jian Siang

AU - Chen, Szu Yu

AU - Sun, Ching Cherng

PY - 2014/7

Y1 - 2014/7

N2 - Two experimental configurations, an imaging system and a confocal system, are constructed to measure the spectral reflectance of human irises in vivo. The light from a white light-emitting diode (LED) is focused on the iris and the reflected light is measured by a spectrometer. A flat plate coated with barium sulphate Ba2 SO4 with reflectance 0.99 for visible light is used as a reference to calibrate the system. Samples of gray-blue and black-brown eyes are measured to compare the performance of the two systems. The differences between the reflectance spectra of the two systems show that Fresnel reflection from the interface between air and cornea is the dominating effect. The spatial filtering characteristic of the confocal system provides a nice capability in eliminating the contribution of cornea reflectance.

AB - Two experimental configurations, an imaging system and a confocal system, are constructed to measure the spectral reflectance of human irises in vivo. The light from a white light-emitting diode (LED) is focused on the iris and the reflected light is measured by a spectrometer. A flat plate coated with barium sulphate Ba2 SO4 with reflectance 0.99 for visible light is used as a reference to calibrate the system. Samples of gray-blue and black-brown eyes are measured to compare the performance of the two systems. The differences between the reflectance spectra of the two systems show that Fresnel reflection from the interface between air and cornea is the dominating effect. The spatial filtering characteristic of the confocal system provides a nice capability in eliminating the contribution of cornea reflectance.

KW - Confocal system

KW - human iris

KW - imaging system

KW - spectral reflectance

UR - http://www.scopus.com/inward/record.url?scp=84903163417&partnerID=8YFLogxK

U2 - 10.1109/JDT.2014.2311439

DO - 10.1109/JDT.2014.2311439

M3 - 期刊論文

AN - SCOPUS:84903163417

SN - 1551-319X

VL - 10

SP - 595

EP - 600

JO - IEEE/OSA Journal of Display Technology

JF - IEEE/OSA Journal of Display Technology

IS - 7

M1 - 6766763

ER -

Imaging and confocal systems for in vivo measurements of human-iris spectral reflectance

Abstract

Keywords

Access to Document

Fingerprint

Cite this