Polarization state conversion in optically active spectroscopy

G - Physics – 01 – J

Patent

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G01J 4/00 (2006.01) G01N 21/19 (2006.01) G01N 21/21 (2006.01) G02B 5/30 (2006.01) G01N 21/47 (2006.01)

Patent

CA 2453307

The invention describes a method to eliminate instrumental offset in measurement of optically active scattering and circular dichroism. The method uses the time-average measurement of the light that is systematically transformed by series of optical devices. The optical devises perform the function of rotating linearly polarized light, interconventing left and right circular polarized light, converting circular polarized light to rotating linear polarized light and converting linear polarized light to alternating left and right circular polarized light.

L'invention concerne un procédé d'élimination de décalage instrumental dans la mesure de diffusion optiquement active et de dichroïsme circulaire. Le procédé utilise la mesure de moyenne temporelle de la lumière systématiquement transformée par une série de dispositifs optiques. Les dispositifs optiques exécutent une fonction de rotation d'une lumière polarisée de façon linéaire, d'interconversion de la lumière polarisée circulaire gauche et droite, de conversion de la lumière polarisée circulaire en lumière polarisée linéaire rotative, et de conversion de la lumière polarisée linéaire en lumière polarisée circulaire alternée gauche et droite.

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