Filtering matrix structure, associated image sensor and 3D mapping device

US8766385B2 · kind B2 · utility

Assignee

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

Inventors

• Pierre Gidon · Échirolles, FR
• Gilles Grand · Grenoble, FR
• Laurent Frey · Fontaine, FR
• Pascale Parrein · Fontaine, FR

Key dates

• Filing date: Sep 13, 2011
• Grant date: Jul 1, 2014
• Expiry date: Jan 9, 2033

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10F39/8063
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

Filtering matrix structure comprising at least three color filters and a plurality of near Infrared filters, each one of the color filters and the near Infrared filters having an optimum transmission frequency, wherein the filtering matrix structure is made of n metal layers (m1, m2, m3) and n substantially transparent layers (d1, d2, d3) which alternate between a first metal layer (m1) and an nth substantially transparent layer (d3), each of the n metal layers (m1, m2, m3) having a constant thickness and at least one substantially transparent layer having a variable thickness which sets the optimum transmission frequency of each color filter and each near Infrared filter, n being an integer larger than or equal to 2.Application to 3D mapping and imaging.