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Proceedings Paper

Bioequivalent UV detectors based on cholesteric liquid crystals: effects of spectral composition and quantitative account for intensity of UV radiation
Author(s): Longin N. Lisetski; Valentina D. Panikarskaya; Natalya A. Kasyan; Leonid V. Grishchenko; Irina P. Terenetskaya
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Paper Abstract

Response of cholesteric sensor materials to biologically active UV radiation has been studied. The sensor mixture comprised a cholesteric liquid crystalline matrix doped with provitamin D, and changes in the maximum selective reflection wavelength λmax caused by the photochemical reaction of provitamin D → vitamin D transformation were recorded. Using a UV source (DRT-240 lamp) calibrated accounting for the specific irradiation geometry, λmax shifts were obtained as function of UV illuminance dose (in J/cm2). Using a set of optical filters cutting off specified parts of the provitamin D absorption spectrum, effects of the spectral composition of UV radiation upon the response characteristics of sensor were determined. The results obtained support our earlier considerations of the developed sensor material as "bioequivalent".

Paper Details

Date Published: 6 December 2006
PDF: 4 pages
Proc. SPIE 6023, Tenth International Conference on Nonlinear Optics of Liquid and Photorefractive Crystals, 60230F (6 December 2006); doi: 10.1117/12.648198
Show Author Affiliations
Longin N. Lisetski, Institute for Single Crystals (Ukraine)
Valentina D. Panikarskaya, Institute for Single Crystals (Ukraine)
Natalya A. Kasyan, Institute for Single Crystals (Ukraine)
Leonid V. Grishchenko, Kharkov State Scientific Research Institute of Metrology (Ukraine)
Irina P. Terenetskaya, Institute of Physics (Ukraine)

Published in SPIE Proceedings Vol. 6023:
Tenth International Conference on Nonlinear Optics of Liquid and Photorefractive Crystals
Gertruda V. Klimusheva; Andrey Iljin; Sergey Al. Kostyukevych, Editor(s)

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