Method for making a polarization-sensitive optical element
AssigneeHoneywell Inc.
InventorBrent D. Larson
Life of this patent
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Abstract
An image display apparatus which employs a polarization-sensitive scattering element (PSSE). In the display, a light source is used to illuminate a panel which modulates light in order to form an image. Positioned between the light source and the panel is the PSSE which acts to effectively separate light of different polarizations. The PSSE provides a means for recapturing light energy which would otherwise be lost in the display, while reducing degradation and heat build-up due to light absorption.
Claims62
A method for producing a polarization-sensitive optical element, comprising the steps of:
- providing a composition, the composition comprising at least two materials, wherein at least one of the two materials is a birefringent material;
- and
- operating on the composition such it has a first scattering distribution to receive light rays of a first polarization, wherein the first scattering distribution is such that the light rays of the first polarization are randomly diffuse and back scattered, and a second scattering distribution to receive light rays of a second polarization.
A method for producing a polarization-sensitive optical element, comprising the steps of:
- providing a composition, the composition comprising composites material domains in a matrix;
- and
- operating on the composition such it has a first scattering distribution to receive light rays of a first polarization, wherein the first scattering distribution is such that the light rays of the first polarization are back scattered, and a second scattering distribution to receive light rays of a second polarization.
A method of producing a polarization-sensitive scattering element to improve the efficiency of a display, comprising the steps of:
- providing a composite of material domains in a matrix;
- and
- using the composite to recapture a loss of polarization in a diffusely illuminated housing by passing a desired polarization to an area external to the housing and reflecting an undesired polarization to an area internal to the housing.
Dependencies are inferred from the claim text.