Patent ID: 7667785
Filing Date: 2010-02-23
Classification: G02B,G02F

Abstract:
1. An optical separating filter for separating impinging light into a first and a second part having different properties, the separating filter comprises reflective filters (FR) being arranged in funnel shaped structures (F 1 ), each one of said funnel shaped structures (F 1 ) having an inlet area (IA 1 ) for receiving the impinging light (IL), an outlet area (OA 1 ) being smaller than the inlet area (IA 1 ) and walls having a decreasing distance towards the outlet area (OA 1 ) for converging reflected impinging light (RL) towards the outlet area (OA 1 ), said structures (F 1 ) comprising a first group of funnel shaped structures (F 1 ) being constructed for reflecting light having a first property (C 1 ) towards their respective first outlet areas (OA 1 ) and for transmitting light having a second property (C 2 ) towards respective second outlet areas (OA 2 ).