Simple multi-wavelength imaging of birefringence:case study of silk

Honda, Reo, Ryu, Meguya, Li, Jingliang, Mizeikis, Vygantas, Juodkazis, Saulius and Morikawa, Junko 2018, Simple multi-wavelength imaging of birefringence:case study of silk, Scientific reports, vol. 8, pp. 1-9, doi: 10.1038/s41598-018-36114-8.

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Title Simple multi-wavelength imaging of birefringence:case study of silk
Author(s) Honda, Reo
Ryu, Meguya
Li, JingliangORCID iD for Li, Jingliang
Mizeikis, Vygantas
Juodkazis, Saulius
Morikawa, Junko
Journal name Scientific reports
Volume number 8
Article ID 17652
Start page 1
End page 9
Total pages 9
Publisher Nature Publishing Group
Place of publication London, Eng.
Publication date 2018-12-05
ISSN 2045-2322
Keyword(s) Characterization and analytical techniques
Optical physics
Science & Technology
Multidisciplinary Sciences
Summary Polarised light imaging microscopy, with the addition of a liquid crystal (LC) phase retarder, was used to determine the birefringence of silk fibres with high (∼1 μm) spatial resolution. The measurement was carried out with the silk fibres (the optical slow axis) and the slow axis of the LC-retarder set at parallel angles. The direct fit of the transmission data allowed for high fidelity determination of the birefringence Δn ≈ 1.63 × 10-2 (with ∼2% uncertainty) of the brown silk fibre, (Antheraea pernyi) averaged over the wavelength range λ = (425-625) nm. By measuring retardance at four separate wavelengths, it was possible to determine the true value of the birefringence of a thicker sample when an optical path may include a large number of wavelengths. The numerical procedures and required hardware are described for the do-it-yourself assembly of the imaging polariscope at a fractional budget compared to commercial units.
Language eng
DOI 10.1038/s41598-018-36114-8
Field of Research 020401 Condensed Matter Characterisation Technique Development
020406 Surfaces and Structural Properties of Condensed Matter
Socio Economic Objective 970110 Expanding Knowledge in Technology
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2018, The Author(s)
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