Optical filtering structure in the visible and/or infrared domain

US9658372B2 · kind B2 · utility

Assignee

• COMMISSARIAT A L'ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES · FR

Inventors

• Laurent Frey · Fontaine, FR
• Marilyn Armand · Grenoble, FR
• Catherine Pelle · Longechenal, FR

Key dates

• Filing date: Jul 25, 2013
• Grant date: May 23, 2017
• Expiry date: Jan 5, 2034

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/49826
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

An optical filtering structure comprising a stack of layers forming a first filter letting pass a first spectral band, and a second filter adjacent to the first filter and which lets pass a second spectral band comprising: a plurality of dielectric layers common to the two filters and of different refractive indices, n first metal layers common to the two filters, m second metal layers arranged only in the second filter, and wherein at least one of said dielectric layers comprises, in the first filter, a thickness different to that in the second filter, and/or wherein at least one dielectric layer is arranged only in the second filter, n being an integer greater than or equal to 0, and m being an integer greater than or equal to 1.