Patent ID: 9160951
Filing Date: 2015-10-13
Classification: G02B,H01L,H04N

Abstract:
1. A solid-state imaging apparatus comprising unit pixels, the unit pixels each having a light-collecting element for collecting incident light, wherein the light-collecting element is divided into a plurality of zones each having a ring shape of a concentric structure and a line width shorter than a wavelength of the incident light, the light-collecting element has an effective refractive index distribution controlled according to a combination of the zones, in at least one of the zones, a light-transmissive film is disposed in the zone and is divided in a circumferential direction of the concentric structure at an interval shorter than the wavelength of the incident light, the light-transmissive film has a first thickness and a second thickness greater than the first thickness in the circumferential direction of the concentric structure, the light-transmissive film of the zone includes a plurality of arc-shaped light-transmissive film elements divided at an interval shorter than the wavelength of the incident light, and the arc-shaped light-transmissive film elements are provided continuously with a light-transmissive film in a ring shape arranged along an inner circumference or an outer circumference of the arc-shaped light-transmissive film element.