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1. (WO2011147383) OPTICAL SENSING DEVICES AND METHODS FOR DETECTING SAMPLES USING THE SAME

Pub. No.:    WO/2011/147383    International Application No.:    PCT/CN2011/077500
Publication Date: Dec 1, 2011 International Filing Date: Jul 22, 2011
IPC: G01N 21/55
G01N 33/48
Applicants: CITY UNIVERSITY OF HONG KONG
THE CHINESE UNIVERSITY OF HONG KONG.
WU, Chi-man, Lawrence
NG, Siu pang
HO, Ho Pui
WU, Shu Yuen
Inventors: WU, Chi-man, Lawrence
NG, Siu pang
HO, Ho Pui
WU, Shu Yuen
Title: OPTICAL SENSING DEVICES AND METHODS FOR DETECTING SAMPLES USING THE SAME
Abstract:
Disclosed are optical sensing devices and methods for detecting samples using the same. The optical sensing device comprises a source unit configured to generate a polychromatic light beam containing p-polarized and s-polarized components; an interferometric unit configured to split the light beam into a probe beam passing a first path and a reference beam passing a second path and to recombine the probe beam output from the first path and the reference beam output from the second path; a sensing unit disposed in the first path to introduce a first SPR effect associated with a target sample to the probe beam; and a detection unit configured to detect target sample characteristics by obtaining an intensity spectrum of the recombined light beam. The introduction of a polychromatic light source in the optical sensing device increases the detection dynamic range and the detection sensitivity.