Design and construction of an optimal Mueller matrix imaging polarimeter for biomedical applications
We present a new method for optimizing rotating compensator polarimeters based on the implementation of an elliptical retarder made by placing two linear retarders at an angle offset. By adjusting the angle between the two retarders, the linear retardance can be adjusted to the optimal value of 132d...
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| Tipo de recurso: | tesis de maestría |
| Fecha de publicación: | 2021 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/388300 |
| Acceso en línea: | https://hdl.handle.net/2117/388300 |
| Access Level: | acceso abierto |
| Palabra clave: | Polarimetry Polarization (Light) Biomedical Imaging Mueller Matrix Optimization Polarització (Llum) Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Telecomunicació òptica |
| Sumario: | We present a new method for optimizing rotating compensator polarimeters based on the implementation of an elliptical retarder made by placing two linear retarders at an angle offset. By adjusting the angle between the two retarders, the linear retardance can be adjusted to the optimal value of 132deg, achieving a condition number of sqrt(3) over a broad spectroscopic range. This elliptical retarder design is first experimentally demonstrated on a Mueller matrix imaging polarimeter in a back-scattering configuration capable of measuring in-vivo tissue samples over a broad 300 nm wavelength range. The setup is shown to be capable of measuring the orientation of collagen fibers on the surface of skin, and has a standard deviation of < 0.01 for all Mueller matrix elements after repeated measurements. A second polarimeter design also utilizing the elliptical retarder is presented that uses a polarization sensitive camera that detects the first three Stokes components simultaneously and is able to measure the top three rows of a Mueller matrix in only N = 4 measurements, offering significant temporal resolution improvements. |
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