Research Papers: Sensing

Spectroscopic sensitive polarimeter for biomedical applications

[+] Author Affiliations
Jessica C. Ramella-Roman

The Catholic University of America, Biomedical Engineering Department, Michigan Avenue NE, Washington, DC 20064

Amritha Nayak

Eunice Kennedy Shriver National Institute of Child Health and Human Development, NICHD-NICHD, Bethesda, Maryland 20817

Scott A. Prahl

Oregon Medical Laser Center, Providence St. Vincent Medical Center, 9205 SW Barnes Road, Portland, Oregon 97225

J. Biomed. Opt. 16(4), 047001 (April 13, 2011). doi:10.1117/1.3561907
History: Received November 23, 2009; Revised January 12, 2011; Accepted February 14, 2011; Published April 13, 2011; Online April 13, 2011
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We present the design and calibration of a spectroscopic sensitive polarimeter. The polarimeter can measure the full Stokes vector in the wavelength range 550 to 750 nm with 1-nm resolution and consists of a fiber-based spectrophotometer, a white light emitting diode light source, two liquid crystal retarders, and one polarizer. Calibration of the system is achieved with a scheme that does not require knowledge of the polarizing elements’ orientation or retardation. Six intensity spectra are required to calculate the full spectrum Stokes vector. Error in the polarimeter is less than 5%. We report the Stokes vectors for light transmitted through nonscattering polarizing elements as well as a measurement of the depolarizing properties of chicken muscle at several wavelengths.

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© 2011 Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation

Jessica C. Ramella-Roman ; Amritha Nayak and Scott A. Prahl
"Spectroscopic sensitive polarimeter for biomedical applications", J. Biomed. Opt. 16(4), 047001 (April 13, 2011). ; http://dx.doi.org/10.1117/1.3561907


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