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US 2003/0072079 A1Published application
Double sided wire grid polarizer
AssigneeEastman Kodak Company
InventorsBarry D. Silverstein, Andrew F. Kurtz, Xiang-Dong Mi
Life of this patent
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Abstract
A wire grid polarizer (100) for polarizing an incident light beam (130), comprising a substrate (505) having a first surface (410) and a second surface (510); and a first array of parallel, elongated wires disposed on the first surface (410). Each of the wires are spaced apart at a grid period less than a wavelength of the incident light; and a second array of parallel, elongated wires disposed on said second surface (420) where the second array of wires are oriented parallel to the first array of wires.
Claims23
A wire grid polarizer for polarizing an incident light beam, comprising:
- a substrate having a first surface and a second surface;
- a first array of parallel, elongated wires disposed on said first surface, wherein each of said wires are spaced apart at a grid period less than a wavelength of said incident light;
- a second array of parallel, elongated wires disposed on said second surface, and wherein said second array of wires are oriented parallel to said first array of wires;
- and
- wherein each of said wires are spaced apart at a grid period less than a wavelength of said incident light.
2 more elements
A modulation optical system for providing high contrast modulation of an incident pre-polarized light beam, comprising:
- (a) a double sided wire grid polarization beam splitter with a substrate having both a first surface and a second surface;
- (i) a first array of parallel, elongated wires are disposed on said first surface, wherein each of said wires are spaced apart at a grid period less than a wavelength of said incident light;
- and
- (ii) a second array of parallel, elongated wires are disposed on said second surface where said second array of wires are oriented parallel to said first array of wires
- wherein said double sided wire grid polarization beam splitter transmits a first polarization state of said pre-polarized light beam and reflects a second polarization state of said pre-polarized light beam, wherein said second polarization state is orthogonal to said first polarization state;
- (b) a reflective spatial light modulator having a plurality of individual elements which alter said first polarization state of said transmitted pre-polarized light beam to provide an image bearing beam;
- and
- (c) a wire grid polarization analyzer which transmits said image bearing light beam and attenuates unwanted polarization components of said image bearing light beam.
5 more elements
A modulation optical system for providing high contrast modulation of an incident pre-polarized light beam, comprising:
- (a) a double sided wire grid polarization beam splitter with a substrate having both a first surface and a second surface;
- (i) a first array of parallel, elongated wires disposed on said first surface, wherein each of said wires are spaced apart at a grid period less than a wavelength of said incident light;
- and
- (ii) a second array of parallel, elongated wires disposed on said second surface , wherein each of said wires are spaced apart at a grid period less than a wavelength of said incident light, wherein said second array of wires are oriented parallel to said first array of wires
- wherein said double sided wire grid polarization beam splitter transmits a first polarization state of said pre-polarized light beam and reflects a second polarization state of said pre-polarized light beam, wherein said second polarization state is orthogonal to said first polarization state;
- (b) a reflective spatial light modulator having a plurality of individual elements which alter said first polarization state of said transmitted pre-polarized light beam to provide an image bearing beam;
- and
- (c) a polarization analyzer which transmits said image bearing light beam and attenuates unwanted polarization components of said image bearing light beam.
5 more elements
A modulation optical system for providing high contrast modulation of an incident light beam, comprising:
- (a) a pre-polarizer for pre-polarizing said beam of light
- (b) a double sided wire grid polarization beam splitter with a substrate having both a first surface and a second surface;
- (i) a first array of parallel, elongated wires disposed on said first surface, wherein each of said wires are spaced apart at a grid period less than a wavelength of said incident light, and
- (ii) a second array of parallel, elongated wires disposed on said second surface, wherein each of said wires are spaced apart at a grid period less than a wavelength of said incident light, wherein said second array of wires are oriented parallel to said first array of wires;
- wherein said double sided wire grid polarization beam splitter transmits a first polarization state of said pre-polarized light beam and reflects a second polarization state of said pre-polarized light beam wherein said second polarization state is orthogonal to said first polarization state;
- and
- (c) a reflective spatial light modulator having a plurality of individual elements which alter said predetermined polarization state of said transmitted pre-polarized light beam to provide said image bearing beam.
4 more elements
A modulation optical system for providing high contrast modulation of an incident light beam, comprising:
- (a) a pre-polarizer for pre-polarizing said beam of light
- (b) a double sided wire grid polarization beam splitter with a substrate having both a first surface and a second surface;
- (i) a first array of parallel, elongated wires are disposed on said first surface, wherein each of said wires spaced apart at a grid period less than a wavelength of said incident light;
- and
- (ii) a second array of parallel, elongated wires disposed on said second surface, wherein each of said wires spaced apart at a grid period less than a wavelength of said incident light, wherein said second array of wires are oriented parallel to said first array of wires;
- where said double sided wire grid polarization beam splitter transmits a first polarization state of said pre-polarized light beam and reflects a second polarization state of said pre-polarized light beam wherein said second polarization state is orthogonal to said first polarization state;
- (c) a reflective spatial light modulator having a plurality of individual elements which alter said predetermined polarization state of said transmitted pre-polarized light beam to provide said image bearing beam;
- and
- (d) a polarization analyzer which transmits said image bearing light beam and attenuates unwanted polarization components of said image bearing light beam.
6 more elements
A wire grid polarizer for polarizing an incident light beam comprising:
- a first array of wires on a first surface of a substrate;
- a second array of wires on a second surface of said substrate;
- wherein said first array maximizes transmission while providing moderate contrast;
- and
- wherein said second array maximizes a reflected contrast while providing high transmission.
2 more elements
A wire grid polarizer for polarizing an incident light beam, comprising:
- a substrate having a first surface and a second surface;
- a first array of parallel, elongated electrically conductive wires disposed on said first surface, wherein each of said wires are spaced apart at a grid period less than a wavelength of said incident light;
- a second array of parallel, elongated electrically conductive wires disposed on said second surface, and wherein said second array of wires are oriented parallel to said first array of wires;
- and
- wherein each of said wires are spaced apart at a grid period less than a wavelength of said incident light.
2 more elements
A wire grid polarization beamsplitter for polarizing an incident light beam, comprising:
- a substrate having a first surface and a second surface;
- a first array of parallel, elongated wires disposed on said first surface, wherein each of said wires are spaced apart at a grid period less than a wavelength of said incident light;
- a second array of parallel, elongated wires disposed on said second surface, and wherein said second array of wires are oriented parallel to said first array of wires;
- and
- wherein each of said wires are spaced apart at a grid period less than a wavelength of said incident light.
2 more elements
A wire grid polarizer for polarizing an incident light beam, comprising:
- a substrate having a first surface and a second surface;
- a first array of parallel, elongated wires disposed on said first surface, wherein each of said wires are spaced apart at a grid period less than a wavelength of said incident light;
- a second array of parallel, elongated wires disposed on said second surface, and wherein said second array of wires are oriented parallel to said first array of wires;
- wherein each of said wires are spaced apart at a grid period less than a wavelength of said incident light;
- wherein said first array maximizes transmission while providing moderate contrast;
- and
- wherein said second array maximizes a reflected contrast while providing high transmission.
4 more elements
Dependencies are inferred from the claim text.