24 August 2009 Confocal scanning Mueller polarimeter
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Abstract
We describe the design, construction, calibration and testing of a confocal scanning Mueller polarimeter. A polarization state generator and polarization state analyzer have been inserted into the optical path of a conventional confocal scanning imager to collect the reflectance Muller matrix of samples measuring up to 6.26 mm on a side. Four sources are available for sample interrogation using diode lasers centered at 532 nm, 635 nm, 670 nm, and 785 nm. The device captures all required imagery to calculate the Mueller matrix of each image pixel in approximately 90 s. These matrices are then reduced into polarization imagery such as the diattenuation, retardance and depolarization index. Oftentimes this polarization imagery is quite different and potentially more informative than a conventional intensity image. There are a number of fields that can benefit from alternative/enhanced imagery, most notably in the biomedical, discrimination, and target recognition communities. The sensor has been designed for biomedical applications aimed at improving the technique of noninvasive detection of melanoma lesions.
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Arthur Lompado, Arthur Lompado, } "Confocal scanning Mueller polarimeter", Proc. SPIE 7461, Polarization Science and Remote Sensing IV, 74610P (24 August 2009); doi: 10.1117/12.827344; https://doi.org/10.1117/12.827344
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