Results 211 to 220 of about 34,079 (254)

Optical anisotropy of polyimide

Journal of Applied Polymer Science, 1990
AbstractOptical anisotropy of polyimide films prepared from polyamic acid solutions was investigated by conoscopic observation and refractive index measurements. The conoscopic figure (crossed pattern) characteristic of a negative uniaxial crystal with its optic axis perpendicular to the film plane was observed for samples imidized on substrates ...
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Correspondence of Optical Anisotropy to Magnetic Anisotropy in Iron Films

Journal of the Physical Society of Japan, 1982
The differences between optical constants for the directions perpendicular and parallel to the incidence plane, Δ n and Δ k were measured in iron films deposited at oblique incidence and their correspondences to the anisotropy field H k were investigated.
Masao Kamiya, Kazuhiro Hara, Hiroshi Fujiwara   +2 more
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Optical anisotropy in cotton

Journal of Physics D: Applied Physics, 1978
The successful observation of multiple-beam interference fringes in cotton is reported, and the method of measuring the optical anisotropy (birefringence) is explained.
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Anisotropy in the optical spectrum of the GaAs(110) surface

Physical Review Letters, 1990
Mise en cause de resultats publies par Zhu et al. concernant la structure electronique de la surface de GaAs et permettant le calcul de l'anisotropie de la reflexion optique des etats de surfaces voisins de la bande ...
MANGHI, Franca, MOLINARI, Elisa, SELLONI A, DELSOLE R.   +3 more
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Fluorescence Anisotropy in the Frequency Domain by an Optical Microscope

Applied Spectroscopy, 2004
Fluorescence anisotropy decay spectroscopy is a suitable tool for investigating the size and the shape of biological molecules. We coupled this technique to an optical microscope in order to reduce the excitation volume and to allow its application to spatially inhomogeneous samples.
COLLINI, MADDALENA, D'ALFONSO, LAURA, BALDINI, GIANCARLO, Oldani, A, Cellai, L, Giordano, C, Barone, F, Mazzei, F, CHIRICO, GIUSEPPE   +8 more
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Measurements of anisotropy in optical turbulence

2017 IEEE Aerospace Conference, 2017
A Hartmann Turbulence Sensor was employed along a 200 meter path over a grassy field to investigate turbulence anisotropy. This sensor was based on a 16″ telescope with a 32 × 32 subaperture array featuring 700 active subapertures and a camera operating as fast as 8000 frames/sec.
Jack E. McCrae, Santasri R. Bose-Pillai, Matthew G. Current, Kevin P. Lee, Steven T. Fiorino   +4 more
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Optical anisotropies of polyoxyethylene oligomers

Journal of the Chemical Society, Faraday Transactions 2, 1972
The mean-squared optical anisotropies 〈γ2〉 of four oligomers of polyoxyethylene glycol dimethyl ether have been determined from measurements of depolarized Rayleigh scattering by carbon tetrachloride solutions at 25°C. They have been interpreted using the valence optical scheme and rotational isomeric state theory.
G. D. Patterson, P. J. Flory
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On the optical anisotropy of lens fiber cells

Experimental Eye Research, 1975
Abstract The birefringence of bovine lens was found to be very small, of the order of 10 −6 –10 −7 . It is proposed that this optical isotropy, that enhances transparency, is due to the fact that the form birefringence and the intrinsic birefringence cancels each other. Calculated values of form and intrinsic birefringence indicate a range from 10 −3
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Optical anisotropy of SiGe superlattices

Journal of Applied Physics, 1996
Optical and electrical properties of SiGe strain-adjusted superlattices have been studied. Diode structures were processed into waveguide geometries to investigate the role of optical confinement and the lowering of cubic symmetry with regards to the polarization properties of interband absorption and emission.
Jesper Engvall, Janos Olajos, Hermann G. Grimmeiss, Hartmut Presting, Horst Kibbel   +4 more
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Dielectric Anisotropy and Optical Transitions.pdf

2022
Similar to thermodynamic phase transitions in matter, readily apparent changes in optical response arise in the transition from isotropic to anisotropic optical phases. Treating the anisotropy of the dielectric permittivity as a control parameter, which changes continuously from zero to a nonzero finite value at the transition, in this work we describe
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