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US 8,913,321 B2Granted
Fine pitch grid polarizer
AssigneeMoxtek, Inc.
InventorMark Alan Davis
Life of this patent
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Abstract
A grid polarizer including an array of groups of parallel elongated ribs disposed over a substrate. Each group of elongated ribs can comprise at least four ribs. Tops of two center ribs, at a center of each group, can be substantially the same elevational height and can be higher by more than 10 nm than tops of outer ribs of the groups. A region between adjacent ribs can have an index of refraction substantially equal to one. Some or all of the ribs can comprise polarizing wires disposed over substrate rods.
Claims14
A grid polarizer, comprising:
- an array of groups of parallel elongated ribs disposed over a substrate, each group of elongated ribs including at least four ribs;
- a region between adjacent ribs in each group having an index of refraction substantially equal to one;
- and
- tops of two inner ribs of each group are substantially the same elevational height and are higher by more than 10 nm than tops of outer ribs of the respective group.
1 more element
A grid polarizer, comprising:
- an array of groups of parallel elongated ribs disposed over a substrate;
- each group of elongated ribs comprises at least six ribs;
- two inner ribs of each group are substantially the same elevational height;
- at least four interior ribs comprise polarizing wires disposed over substrate rods;
- the ribs are arranged in stepped pyramidal cross-sectional shape such that tops of the two inner ribs are highest, and tops of each outer rib is lower, by at least 20 nm, than an adjacent interior rib;
- each rib is paired with another rib of substantially the same elevational height on an opposite side of the pyramidal cross-sectional shape;
- and
- a distance between the outermost ribs in each group is less than 200 nanometers.
5 more elements
Dependencies are inferred from the claim text.