Patent ID: 8766385
Filing Date: 2014-07-01
Classification: G02B,H01L

Abstract:
1. A filtering matrix structure comprising at least three different color filters and a plurality of near Infrared filters, each one of the different color filters and the near Infrared filters having an optimum transmission frequency, wherein the filtering matrix structure is made of n metal layers (m 1 , m 2 , m 3 ) and n substantially transparent layers (d 1 , d 2 , d 3 ) which alternate between a first metal layer (m 1 ) and an n th substantially transparent layer (d 3 ), each of the n metal layers (m 1 , m 2 , m 3 ) 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.