Polarizing light filter
AssigneeLankhorst Touwfabrieken B.V.
InventorsFernando Andres EBLAGON, Rui Francisco DE NEIVA MOURA BASTOS
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Abstract
The invention is directed to a polarizer comprising an elongated element comprising a polyolefin, wherein the elongated element is unidirectionally drawn at a draw ratio within an overdrawing region and wherein the elongated element has a polarizing effect of at least 5%. The invention further relates to a method for producing said polarizer by drawing an undrawn or partially drawn elongated element within an overdrawing region and to particular uses and applications of said polarizer.
Claims23
A polarizer comprising an elongated element comprising a polyolefin, wherein the elongated element is unidirectionally drawn at a draw ratio within an overdrawing region and wherein the elongated element has a polarizing effect (PE) of at least 5%, wherein the polarizing effect is defined as the largest difference between light transmittance of two essentially orthogonally polarized components (Tmax and Tmin) of a visible light beam in accordance with the below Equation II.
- PE
- =
- Tm
-
- ax
- -
- Tmin
- Tmax
- *
- 1
-
- 0
-
- 0
-
- %
- (
- Equation
-
- II
- )
4-5. (canceled)
7-9. (canceled)
(canceled)
Use of a multilayered elongated element as a polarizer, wherein the multilayered elongated element comprises an inner layer and one or more outer layers each independently comprising a polyolefin, wherein the elongated element is unidirectionally drawn at a draw ratio within an overdrawing region and wherein the elongated element has a polarizing effect (PE) of at least 5%, wherein the maximum polarizing effect is defined as the largest difference between light transmittance of two essentially orthogonally polarized components (Tmax and Tmin) of a visible light beam in accordance with the equation II below.
- PE
- =
- Tm
-
- ax
- -
- Tmin
- Tmax
- *
- 1
-
- 0
-
- 0
-
- %
- (
- Equation
-
- II
- )
Dependencies are inferred from the claim text.