Pulse oximetry optical sensor using oxygen-bound haemoglobin. / Cohen, Z J V; Haxha, Shyqyri; Aggoun, A.

In: Optics Express, Vol. 24, No. 9, 29.04.2016, p. 10115-10131.

Research output: Contribution to journalArticlepeer-review



In this paper we report a unique approach to measuring oxygen saturation levels by utilising the wavelength of the haemoglobin instead of the conventional absorption difference. Two experiments are set up to measure the wavelength of the haemoglobin bound to oxygen at different oxygen saturation levels with the help of a spectrometer. We report a unique low cost and robust wavelength monitoring SpO2 sensor that measures the SpO2 by using the colour of the blood and not the absorption difference of oxyhaemoglobin and deoxyhaemoglobin. With use of a spectrometer, we show that the wavelength of the oxygen-bound haemoglobin has a relation to the oxygen saturation level. The proposed device is designed and experimentally implemented with a colour sensor to measure the SpO2 level of the blood.
Original languageEnglish
Pages (from-to)10115-10131
Number of pages17
JournalOptics Express
Issue number9
Publication statusPublished - 29 Apr 2016
This open access research output is licenced under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License.

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