| US 7,570,424 B2 | ||
| Multilayer wire-grid polarizer | ||
| Raymond T. Perkins, Orem, Utah (US); Cheng-Yuan Cheng, Chandler, Ariz. (US); Douglas P. Hansen, Spanish Fork, Utah (US); and Eric W. Gardner, Eagle Mountain, Utah (US) | ||
| Assigned to Moxtek, Inc., Orem, Utah (US) | ||
| Filed on Dec. 06, 2004, as Appl. No. 11/5,927. | ||
| Prior Publication US 2006/0119937 A1, Jun. 08, 2006 | ||
| Int. Cl. G02B 5/30 (2006.01) | ||
| U.S. Cl. 359—486 [359/495; 359/576] | 19 Claims |
| 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;
c) at least three continuous thin film layers, disposed between the substrate and the wire-grid layer and extending between
the gaps, the thin film layers having different refractive indices with respect to one another;
d) the refractive index of at least one of the three thin film layers being greater than a refractive index of the substrate;
and
e) at least one of the thin film layers includes a dielectric grid including an array of non-metal elements, the non-metal
and metal elements of the arrays being oriented substantially parallel with one another, and the arrays having substantially
equal periods.
|