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1. WO2007145811 - DIFFUSELY-REFLECTING POLARIZER HAVING NEARLY ISOTROPIC CONTINUOUS PHASE

Publication Number WO/2007/145811
Publication Date 21.12.2007
International Application No. PCT/US2007/012670
International Filing Date 30.05.2007
IPC
G02B 5/02 2006.01
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
5Optical elements other than lenses
02Diffusing elements; Afocal elements
CPC
G02B 5/0236
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
5Optical elements other than lenses
02Diffusing elements; Afocal elements
0205characterised by the diffusing properties
0236the diffusion taking place within the volume of the element
G02B 5/0257
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
5Optical elements other than lenses
02Diffusing elements; Afocal elements
0205characterised by the diffusing properties
0257creating an anisotropic diffusion characteristic, i.e. distributing output differently in two perpendicular axes
G02B 5/0284
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
5Optical elements other than lenses
02Diffusing elements; Afocal elements
0273characterized by the use
0284used in reflection
G02B 5/3008
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
5Optical elements other than lenses
30Polarising elements
3008comprising dielectric particles, e.g. birefringent crystals embedded in a matrix
G02B 5/3083
GPHYSICS
02OPTICS
BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
5Optical elements other than lenses
30Polarising elements
3083Birefringent or phase retarding elements
Applicants
  • EASTMAN KODAK COMPANY [US]/[US] (AllExceptUS)
  • MI, Xiang-Dong [CN]/[US] (UsOnly)
  • GREENER, Jehuda [US]/[US] (UsOnly)
  • ANDERSON, Charles Chester [US]/[US] (UsOnly)
  • LANEY, Thomas Miles [US]/[US] (UsOnly)
Inventors
  • MI, Xiang-Dong
  • GREENER, Jehuda
  • ANDERSON, Charles Chester
  • LANEY, Thomas Miles
Common Representative
  • EASTMAN KODAK COMPANY
Priority Data
11/643,07021.12.2006US
60/810,88405.06.2006US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) DIFFUSELY-REFLECTING POLARIZER HAVING NEARLY ISOTROPIC CONTINUOUS PHASE
(FR) POLARISEUR RÉFLÉCHISSANT DIFFUSÉMENT COMPORTANT UNE PHASE CONTINUE PRESQUE ISOTROPE
Abstract
(EN)
The present invention provides a diffusely-reflecting polarizer comprising: a first polymer which is amorphous and having a birefringence of less than about 0.02 and a second polymer, the first polymer being a continuous phase, and the second polymer being a disperse phase whose index of refraction differs from said continuous phase by greater than about 0.05 along a first axis and by less than about 0.05 along a second axis orthogonal to said first axis; wherein the diffuse-reflectivity of said first and second polymers taken together along at least one axis for at least one polarization state of electromagnetic radiation is at least about 50%, the diffuse transmittance of said first and second polymers taken together along at least one axis for at least one polarization state of electromagnetic radiation is at least about 50%.
(FR)
La présente invention concerne un polariseur réfléchissant diffusément comprenant : un premier polymère qui est amorphe et dont la biréfringence est inférieure à environ 0,02 et un second polymère, le premier polymère étant une phase continue, et le second polymère étant une phase dispersée dont l'indice de réfraction est différent de ladite phase continue de plus d'environ 0,05 le long d'un premier axe et de moins d'environ 0,05 le long d'un second axe orthogonal audit premier axe ; la réflectivité diffuse desdits premier et second polymères ensemble le long d'au moins un axe pour au moins un état de polarisation de rayonnement électromagnétique étant d'au moins environ 50%, le facteur de transmission diffuse desdits premier et second polymères ensemble le long d'au moins un axe pour au moins un état de polarisation de rayonnement électromagnétique étant d'au moins environ 50%.
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