Patent ID: 7692129

Claim:
A solid-state imaging device, comprising: a light-collector having a modulated effective refractive index distribution comprising a combination of a plurality of zone areas with a plural-stage concentric structure, the plurality of zone areas being divided into line widths which are equal to or shorter than a wavelength of an incident light, wherein at least one of the plurality of zone areas includes: a lower light-transmitting film with a first plural-stage concentric structure and having a first line width and a first film thickness; and an upper light-transmitting film with a second plural-stage concentric structure, configured on said lower light-transmitting film, and having a second line width and a second film thickness, wherein the plural-stage concentric structure includes a plurality of basic patterns each having a different combination of said upper light-transmitting film and said lower light-transmitting film, and wherein a width of one of the plurality of basic patterns located in an outer side of the plural-stage concentric structure is smaller than the wavelength of the incident light.