Optoelectronic and spectral analysis of urine can be performed on site by low-cost portable technology, interfaced to signal processing and machine learning algorithm. These algorithms, trained on a set of previously known diagnostic outputs, can correlate the urine optoelectronic measured parameters with the person’s health status. The proposed solution is the development of an optoelectronic setup, suitable to be embedded in a portable configuration, capable of performing on site and in a short amount of time a urine screening based on a set of techniques of increasing three levels of complexity. The proposed parameters to be measured are dominant color and turbidity (1st level), UV induced fluorescence (2nd level), Raman Spectroscopy (3rd level). The system can be used to perform a set of measurements on a set of urine samples of already known health condition to carry out the training of a machine learning algorithm for assessing the risk of developing Acute Kidney Injury. All the technical information is public open access, available at https://github.com/ISELDEETC/PhotoAKI/tree/main/LUMINA.
It is presented in this work a description of an optomechanical setup to be used for the characterization of planar photonic chips. The system allows the fine tuning of an optical fiber position on an input grating, controlling its XYZ position and its angle of incidence. A similar configuration is used for the output extraction, while a fiber array can be used an alternative to monitor multiple output channels. Such a configuration can be useful for characterization of arrayed sensing devices or Optical Phased Arrays. The system can be used in the visible range and in the IR spectrum as well, provided the input light source is changed. All the setting are controlled manually, and it is prepared to easily perform a sequential analysis of a set of identical circuits, fabricated in a parallel configuration on the same chip. As most of the components are individually and commercially available thought the Thorlabs website, the set up can be easily replicated, so all the system designs are made available in Open Access modality in SolidWorks format. Examples of characterization process and the obtained results are reported to demonstrate the use of the system and to support a tolerance analysis.
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