Optical and electrical characterization of natural and synthetic melanin

The optical properties of natural and synthetic melanin have been characterized for a number of laser wavelengths in the visible region. Natural melanin was prepared from hydrolyzed melanosomes isolated from normal, bovine retinal pigment epithelium. The inverse adding doubling method based on the d...

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Bibliographic Details
Published inProceedings of the Second Joint 24th Annual Conference and the Annual Fall Meeting of the Biomedical Engineering Society] [Engineering in Medicine and Biology Vol. 3; pp. 2253 - 2254 vol.3
Main Authors Glickman, R.D., Sardar, D.K., Salinas, F.S., Hobbs, M.C.
Format Conference Proceeding
LanguageEnglish
Published IEEE 2002
Subjects
Anisotropic magnetoresistance
Bovine
Electromagnetic wave absorption
Laser theory
Optical films
Optical reflection
Optical scattering
Pigmentation
Retina
Wavelength measurement
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Summary:The optical properties of natural and synthetic melanin have been characterized for a number of laser wavelengths in the visible region. Natural melanin was prepared from hydrolyzed melanosomes isolated from normal, bovine retinal pigment epithelium. The inverse adding doubling method based on the diffusion approximation and radiative transport theory was employed to determine the absorption, scattering, and scattering anisotropy coefficients of melanin from the measurements of diffuse transmission, diffuse reflection and collimated transmission using double integrating spheres. The results obtained by the use of the inverse adding doubling method were compared to the Monte Carlo simulation technique. Characterization of melanin is now being extended to include electrical photoconductivity of melanin thin films on a semiconductor substrate.
ISBN:0780376129
9780780376120
ISSN:1094-687X
1558-4615
DOI:10.1109/IEMBS.2002.1053268