Patent ID: 7269325
Filing Date: 2007-09-11
Classification: G02B

Abstract:
1. A tunable optical device comprising: a electrically conductive substrate; a first electrostatically deflectable outer membrane consisting of alternate layers of high refractive index material and low refractive index material, separated from said substrate by a non-optical cavity; a middle electrostatically deflectable membrane consisting of alternate layers of high refractive index material and low refractive index material, separated from said first outer membrane by a first optical cavity; a second eletrostatically deflectable outer membrane consisting of alternate layers of high refractive index material and low refractive index material, separated from said middle membrane by a second optical cavity; wherein said non-optical cavity is defined by a sacrificed layer between said substrate and said first outer membrane, said first optical cavity is defined by a sacrificed layer between said first outer membrane and said middle membrane, said second optical cavity is defined by a sacrificed layer between said middle membrane and said second outer membrane.