Patent ID: 8947761
Filing Date: 2015-02-03
Classification: G02B

Abstract:
1. An optical element, comprising: a first electrode and a second electrode that are arranged opposite each other, the first electrode allowing part of incident light to pass therethrough and reflecting another part of the incident light, and the second electrode reflecting light that has passed through the first electrode; wherein a light-shielding film or a light absorption film is provided adjacent the second electrode; a first dielectric film and a second dielectric film covering the first electrode and the second electrode, respectively; and a first medium and a second medium each interposed and sealed in a space containing a cavity portion between the first dielectric film and the second dielectric film, the first medium and the second medium having refractive indices different from one another, and one of the first medium and the second medium being a polar liquid, wherein light with a specific wavelength is emitted to an exterior, the light being derived from interference between first reflected light reflected by the first electrode and second reflected light reflected by the second electrode, and wherein the following conditional expressions (1) and (2) are satisfied: where λ denotes a wavelength of return light, d denotes an interval between the first electrode and the second electrode, N