Linear dichroism of the retinal nerve fiber layer expressed with Mueller matrices

Benoit, Anne-Marie; Naoun, K.; Louis-Dorr, Valérie; Mala, L.; Raspiller, A

doi:10.1364/ao.40.000565

Cited by 22 publications

(11 citation statements)

References 7 publications

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“…The analysis of these signals using MMM is developed herein. To date, MMM has been applied to problems in biomedical optics,18–25 turbid media,26–32 liquid crystal display components,33–38 and even to the analysis of a magnetic fluid,39 but there are no applications in crystallography to the best of our knowledge, a yawning gap and a terrific opportunity.…”

Section: Introductionmentioning

confidence: 99%

Imaging chiroptical artifacts

2009

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It is well-known that circular dichroism (CD) measurements of anisotropic media may contain artifacts that result from mixed linear anisotropies. Such artifacts are generally considered a nuisance. However, systematic artifacts, carefully measured, may contain valuable information. Herein, polycrystalline spherulites of D-sorbitol grown from the melt were analyzed with a Mueller matrix microscope, among other differential polarization images devices. As spherulites grew into one another they developed strong apparent optical rotation and CD signals at the boundaries between spherulites. These signals are shown not to have a chiroptical origin but rather result from the interactions of linear anisotropies in polycrystalline bodies. Such chiroptical artifacts should not be dismissed reflexively. Rather, they are comprehensible crystal-optical effects that serve to define mesoscale structure.

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Section: Introductionmentioning

confidence: 99%

Imaging chiroptical artifacts

2009

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“…, 2002). Mueller matrices have also been used in the measurement of ocular dichroism (Benoit et al. , 2001).…”

Section: Introductionmentioning

confidence: 99%

A Mueller matrix model of Haidinger's brushes

Misson

2003

Ophthalmic Physiologic Optic

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Stokes vectors and Mueller matrices are used to model the polarisation properties (birefringence, dichroism and depolarisation) of any optical system, in particular the human eye. An explanation of the form and behaviour of the entoptic phenomenon of Haidinger's brushes is derived that complements and expands upon a previous study. The relationship between the appearance of Haidinger's brushes and intrinsic ocular retardation is quantified and the model allows prediction of the effect of any retarder of any orientation placed between a source of polarised light and the eye. The simple relationship of minimum contrast of Haidinger's brushes to the cosine of total retardation is derived.

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“…If the flowing material in Figure is coaxially birefringent/dichroic oriented at 0° with the flow direction, the Mueller matrices formalism can be used to calculate the cross‐polarized transmitted light intensity measured by the photoresistor [light‐dependent resistor (LDR) 1] that is placed behind the analyzer . The unpolarized wave issued from the source with intensity I 0 is described by the Stokes vector S 0 .…”

Section: Theorymentioning

confidence: 99%

Form birefringence and turbidity of polystyrene/poly(methyl methacrylate) blends in slit dies and planar contractions

Silva

Canevarolo

2016

J of Applied Polymer Sci

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The birefringence and turbidity of a polystyrene/poly(methyl methacrylate) (PMMA) blend, with the concentration of the PMMA dispersed phase ranging up to 1%, were measured in both a slit channel with a constant cross section and a planar hyperbolic contraction/expansion (8:1:8). The measurements were performed by the attachment of a modular rheo-optical die to a twin-screw extruder. The optical arrangement had a red light-emitting diode as the source and two photoresistors, with one of them measuring the turbidity and the other one measuring the transmitted intensity between cross-polarizers. The experimental procedure consisted of the stopping of the extruder feeding, while the screw rotation was kept constant. Because the form birefringence could be associated with the shape of the droplets, these measurements were used to infer information about the PMMA droplet deformation and breakup. EXPERIMENTAL Materials and Blend PreparationA commercial grade of PS, referred to as N2560, from Innova, and a PMMA, provided by Unigel, were used to prepare the PS/ PMMA bends. To ensure a good dispersion and distribution and, therefore, a stable optical signal, the blends were extruded twice, with the optical signals being measured in the second extrusion only. The concentration of the PMMA dispersed phase was varied between 0 and 1% w/w.

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Linear dichroism of the retinal nerve fiber layer expressed with Mueller matrices

Cited by 22 publications

References 7 publications

Imaging chiroptical artifacts

Imaging chiroptical artifacts

A Mueller matrix model of Haidinger's brushes

Form birefringence and turbidity of polystyrene/poly(methyl methacrylate) blends in slit dies and planar contractions

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