IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0400100
(2009-03-09)
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등록번호 |
US-7813039
(2010-11-01)
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발명자
/ 주소 |
- Perkins, Raymond T.
- Cheng, Cheng-Yuan
- Hansen, Douglas P.
- Gardner, Eric W.
|
출원인 / 주소 |
|
대리인 / 주소 |
Thorpe North & Western, LLP
|
인용정보 |
피인용 횟수 :
21 인용 특허 :
305 |
초록
▼
A multilayer wire-grid polarizer for polarizing light includes a stack of thin film layers disposed over a substrate, including a wire-grid array of elongated metal elements having lengths longer than a wavelength of the light and a period less than half the wavelength of the light. One of the layer
A multilayer wire-grid polarizer for polarizing light includes a stack of thin film layers disposed over a substrate, including a wire-grid array of elongated metal elements having lengths longer than a wavelength of the light and a period less than half the wavelength of the light. One of the layers can include a thin film layer with a refractive index greater than a refractive index of the substrate. One of the thin film layers can include a dielectric array of non-metal elements.
대표청구항
▼
The invention claimed is: 1. A wire-grid polarizer device for polarizing light, comprising: a) a substrate; b) a wire-grid layer, disposed over the substrate, the wire-grid layer including an array of elongated metal elements having lengths longer than a wavelength of the light and a period less th
The invention claimed is: 1. A wire-grid polarizer device for polarizing light, comprising: a) a substrate; b) a wire-grid layer, disposed over the substrate, the wire-grid layer including an array of elongated metal elements having lengths longer than a wavelength of the light and a period less than half the wavelength of the light and defining gaps between the elements; and c) a plurality of bordering dielectric-grid layers bordering one another, disposed over the wire-grid layer, the dielectric-grid layer including an array of non-metal elements; and d) the non-metal and metal elements of the arrays being oriented substantially parallel with one another, and the arrays having substantially equal periods. 2. A device in accordance with claim 1, further comprising: at least one continuous thin film layer disposed between the wire-grid layer and the substrate and extending between the gaps. 3. A device in accordance with claim 2, wherein the at least one continuous thin film layer comprises a plurality of continuous thin film layers with different refractive indices with respect to one another, disposed between the wire-grid layer and the substrate and extending between the gaps. 4. A device in accordance with claim 3, wherein at least one of the continuous thin film layers includes a dielectric grid including an array of non-metal elements. 5. A device in accordance with claim 2, further comprising at least one continuous thin film layer disposed over the plurality of adjacent dielectric-grid layers. 6. A device in accordance with claim 5, wherein the at least one continuous thin film layer disposed over the plurality of adjacent dielectric-grid layers comprises a plurality of continuous thin film layers with different refractive indices with respect to one another. 7. A device in accordance with claim 5, wherein the at least one continuous thin film layer disposed over the plurality of adjacent dielectric-grid layers includes a dielectric grid including an array of non-metal elements. 8. A device in accordance with claim 1, wherein the plurality of bordering dielectric-grid layers are formed of different materials. 9. A device in accordance with claim 1, wherein the plurality of bordering dielectric-grid layers have different indices of refraction. 10. A device in accordance with claim 9, wherein an index of refraction of a lower of the plurality of bordering dielectric-grid layers is less than an index of refraction of an upper of the plurality of bordering dielectric-grid layers. 11. A device in accordance with claim 1, wherein the plurality of bordering dielectric-grid layers are disposed directly on top of the wire-grid layer. 12. A wire-grid polarizer device for polarizing light, comprising: a) a substrate; b) a wire-grid layer, disposed over the substrate, the wire-grid layer including an array of elongated metal elements having lengths longer than a wavelength of the light and a period less than half the wavelength of the light and defining gaps between the elements; and c) a plurality of contiguous dielectric-grid layers contiguous with one another, disposed directly on top of the wire-grid layer, each dielectric-grid layer including an array of non-metal elements, the plurality of contiguous dielectric-grid layers including different materials with different indices of refraction; and d) the non-metal and metal elements of the arrays being oriented substantially parallel with one another, and the arrays having substantially equal periods. 13. A device in accordance with claim 12, further comprising: at least one continuous thin film layer disposed between the wire-grid layer and the substrate and extending between the gaps. 14. A device in accordance with claim 13, wherein the at least one continuous thin film layer comprises a plurality of continuous thin film layers with different refractive indices with respect to one another, disposed between the wire-grid layer and the substrate and extending between the gaps. 15. A device in accordance with claim 14, wherein at least one of the continuous thin film layers includes a dielectric grid including an array of non-metal elements. 16. A device in accordance with claim 12, wherein an index of refraction of a lower of the plurality of bordering dielectric-grid layers is less than an index of refraction of an upper of the plurality of bordering dielectric-grid layers. 17. A wire-grid polarizer device for polarizing light, comprising: a) a substrate; b) a wire-grid layer, disposed over the substrate, the wire-grid layer including an array of elongated metal elements having lengths longer than a wavelength of the light and a period less than half the wavelength of the light and defining gaps between the elements; and c) a plurality of bordering dielectric-grid layers bordering one another, disposed over the wire-grid layer, at least one of the dielectric-grid layers including an array of dielectric material elements; and d) the array of dielectric material elements and the array of metal elements being oriented substantially parallel with one another, and the arrays having substantially equal periods. 18. A device in accordance with claim 17, further comprising: at least one continuous thin film layer disposed between the wire-grid layer and the substrate and extending between the gaps. 19. A device in accordance with claim 18, wherein the at least one continuous thin film layer comprises a plurality of continuous thin film layers with different refractive indices with respect to one another, disposed between the wire-grid layer and the substrate and extending between the gaps. 20. A device in accordance with claim 19, wherein at least one of the continuous thin film layers includes a dielectric grid including an array of dielectric material elements.
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