Orientation information added to IR hyperspectral imaging: silk and paracetamol

Meguya Ryu; Soon Hock Ng; Jitraporn Vongsvivut; Mark J. Tobin; Junko Morikawa; Saulius Juodkazis

doi:10.1117/12.2551712

30 December 2019 Orientation information added to IR hyperspectral imaging: silk and paracetamol

Meguya Ryu, Soon Hock Ng, Jitraporn Vongsvivut, Mark J. Tobin, Junko Morikawa, Saulius Juodkazis

Proceedings Volume 11202, Biophotonics Australasia 2019; 1120210 (2019) https://doi.org/10.1117/12.2551712
Event: ANZCOP, 2019, Melbourne, Australia

Abstract

Malus (1809) and Beer-Lambert (1729) laws can be combined to separate birefringence and dichroism contributions in IR hyperspectral imaging. This is achieved by using two optically aligned polarisers for the highest transmittance. By rotation sample between the two aligned polarisers, spectra are taken at several angles for a better fit. This method is shown to resolve orientation of sub-diffraction patterns which are ~50 times smaller than the diffraction limit of 5:1 μm (at the wavelength 3.3 μm). Application potential for very different fields ranging from microscopy of bio- and pharmaceutical materials (silk and paracetamol) to satellite imaging of ocean waves with altimeter at K∝ band of 35.75 GHz or 8.39 cm wavelength will be discussed.

Citation Download Citation

Meguya Ryu, Soon Hock Ng, Jitraporn Vongsvivut, Mark J. Tobin, Junko Morikawa, and Saulius Juodkazis "Orientation information added to IR hyperspectral imaging: silk and paracetamol", Proc. SPIE 11202, Biophotonics Australasia 2019, 1120210 (30 December 2019); https://doi.org/10.1117/12.2551712

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KEYWORDS

Absorbance

Birefringence

Dichroic materials

Infrared imaging

Ocean optics

Hyperspectral imaging

Synchrotron technology

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