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Compensation of the Birefringence of a Polymer by a Birefringent Crystal

Science, 2003
We report a method for compensating the birefringence of optical polymers by doping them with inorganic birefringent crystals. In this method, an inorganic birefringent material is chosen that has the opposite birefringence to that of the polymer and has rod-shaped crystals that are oriented when the polymer chains are oriented.
Ryuichi Sakaguchi   +4 more
openaire   +2 more sources

The Birefringent Filter [PDF]

open access: possibleJournal of the Optical Society of America, 1949
The birefringent filter, invented in 1933 by Bernard Lyot, and independently in 1938 by Yngve Öhman, has been widely used in observing solar limb emission line phenomena which are ordinarily invisible because of the background of atmospheric and instrumental scattered light.
Walter O Roberts, John W. Evans
openaire   +2 more sources

Birefringence of actin

Biopolymers, 1991
AbstractThe total strain birefringence of F‐actin isolated from chicken gizzards was measured as a function of elongation in thin transparent films. Each film held at a certain elongation in a jig was allowed to swell in a penetrating but nondissolving liquid. Seven liquids with different refractive indices were employed.
Frederick A. Bettelheim   +1 more
openaire   +3 more sources

Studies of the birefringence and birefringence dispersion of polypeptides and proteins

Biopolymers, 1966
AbstractAn apparatus has been constructed which permits the polarimetric observation of streaming solutions of macromolecules. The apparatus is a streaming birefringence device allowing the usual measurements of birefringence parallel to the cylinder axis but which in addition transmits light in the radial direction.
P. J. Oriel, John A. Schellman
openaire   +3 more sources

Reversibility of photoinduced birefringence in ultralow-birefringence fibers

Optics Letters, 1996
New measurements of the birefringence induced in ultralow-birefringence fibers by a succession of orthogonally polarized UV side exposures show the reversibility of the process. Moreover, it is shown that the birefringence growth depends on two parameters, the total irradiation dose and the nature of the successive polarized UV side exposures.
D. Varelas   +5 more
openaire   +3 more sources

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