info:eu-repo/semantics/doctoralThesis
OPTICAL CLASSIFICATION OF LIQUID SOLUTIONS BY MEANS OF A SINGLE GAUßLET: AN APPLICATION ON THE DETERMINATION OF GLUCOSE CONCENTRATION IN TRANSPARENT AND TURBID MEDIA
Autor
FRANCISCO JOEL CERVANTES LOZANO
Institución
Resumen
"In this thesis we describe an optical technique that allows classifying liquid solutions by means of a single Gaublet; specifically, the technique is based on measuring the semiwidth of a single Gaussian focused probe beam while profiling a calibrated reflective grating by means of a specially devised homodyne detector which is described in the following section.
The probe beam consists of focusing a laser beam with a Gaussian intensity profile. To focus the beam a large working distance microscope objective is used as the focusing lens. The measurements are performed by placing the sample (solution under measurement) between the focusing lens and the detection plane. Changes in the refractive index of the sample result in variations in the size of the focused beam under measurement. An application of the technique for measuring glucose concentration in transparent and turbid media is presented. In the following sections we show how our proposal is applied for transparent samples as well as for turbid samples that simulate optical properties of biological tissues."
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