The rainbow beam experiment: direct visualization of dipole scattering and optical rotatory dispersion

Hagen, Nathan; Tadokoro, Toshiyasu

doi:10.1117/12.2526479

Cited by 3 publications

(2 citation statements)

References 9 publications

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“…(Note that 120 mm of sucrose at a concentration at 90% of the saturation point would be required to give the same optical rotation at 525 nm. 16 ) By changing the analyzer angle, h, the location of the zero intensity can be moved through the spectrum, which is responsible for the color change effects observed in Fig. 1.…”

Section: Theorymentioning

confidence: 99%

Optical rotation of white light

Anderson

Gillen

Wright

et al. 2020

American Journal of Physics

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Section: Theorymentioning

confidence: 99%

Optical rotation of white light

Anderson

Gillen

Wright

et al. 2020

American Journal of Physics

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“…The presence of strong ORD is most easily demonstrated by imaging the material between crossed polarizers [ 34 – 36 ]; the angle between the crossed polarizers dictates which wavelengths of light are transmitted by the first polarizer, rotated by the material, transmitted through the second polarizer, and subsequently imaged. ORD can also be characterized by measuring the fluorescence emission spectrum of a chiral medium [ 37 ]. Strong ORD means that the rotation angle depends strongly on wavelength, and therefore, the colours transmitted by the second polarizer change significantly with polarizer angle.…”

Section: Introductionmentioning

confidence: 99%

Measurements of large optical rotary dispersion in the adipose eyelid of Atlantic mackerel ( Scomber scombrus )

Jenkinson

Alexander

Camp

2023

J. R. Soc. Interface.

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Collagen is the most prevalent of Nature’s structural proteins, and is found in the extracellular matrices of animals. The structures of collagen molecules and aggregates are chiral, which leads to the rotation of transmitted, plane-polarized light. Here, it is shown that the concentrations of chiral molecules and aggregates in the optically transparent, adipose eyelid of Atlantic mackerel ( Scomber scombrus ) can be so high, that plane-polarized light in the visible spectrum is rotated by tens to hundreds of degrees, depending on wavelength (the optical rotatory dispersion (ORD)). This gives rise to intensely coloured images of eyelid samples when illuminated with white light and viewed between crossed polarizers. The ORD in the visible spectrum is measured with monochromatic light sources, and using this dispersion, the variation of optical thickness within a sample (proportional to collagen concentration and path length) is determined. The agreement between observed and simulated white-light images is almost perfect. While collagen provides vital mechanical rigidity to animal tissue, it might also possess optical properties that are useful for vision and camouflage.

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