5 May 2015 The development of multi incident angles and multi points measurement phase image interrogation surface plasmon resonance system
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Abstract
Surface plasmon resonance (SPR) is one of the recent applied technologies in bio-medical detection, and it is gradually accepted by the researchers. However, it is still not adopted widely and needs more efforts to improve. In our research work, a previous developed phase interrogation SPR detection system is modified and the concept of multi-incident angles of detecting light is used for obtaining more data. Besides, using the focusing characteristic of a cylindrical elliptic reflective mirror to have more than one measuring areas, and this can provide a control reaction accompanied with the experimental reaction on the chip at the same time. The phase variation of the sample variation with different detecting incident angle can provide more data and can reduce the errors, increase the resolution, and raise the detection ability. To acquire the inference fringes images of the phase, the time-stepped quadrature phase shifting method has been introduced, which required fewer images to retrieve the phase than the five-stepped phase shifting method. The data processing time can be reduced and our system would have the potential to measure the reaction in real-time. Finally, sodium chloride-water solution and Ethanol-water solution in different concentration has been measured to verify our system is workable.
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Jyun Liao, Jyun Liao, Shu-Sheng Lee, Shu-Sheng Lee, Shih-Yuan Lin, Shih-Yuan Lin, "The development of multi incident angles and multi points measurement phase image interrogation surface plasmon resonance system", Proc. SPIE 9506, Optical Sensors 2015, 95060R (5 May 2015); doi: 10.1117/12.2178697; https://doi.org/10.1117/12.2178697
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