Light-collecting device and solid-state imaging apparatus

Abstract

In order to realize high resolution and high picture quality of a solid-state imaging apparatus, a light-collecting device which is resistant to incident light incoming at a high-angle and a manufacturing method of the light-collecting device are provided. The light-collecting device includes light-transmitting films 101 which form concentric circles wherein, in each area divided by a constant width 103 of the divided area in an in-plane direction, a sum of line widths of a width 103 in the divided area is different each other. In each divided area, outer radius/inner radius of a light-transmitting film 101 may match outer radius/inner radius of the divided area. In each divided area, the sum of line widths is smaller than a sum of line widths in an adjacent inner divided area. The concentric zone model is a circle and the sum W of line widths of the light-transmitting films in the divided area satisfies the following equation of W=a(1+m−n1r2/(2λf)), where a wavelength of incident light is λ, a focal length is f, a width of a divided area is a, an effective refractive index of a light-transmitting film is n1, and a Fresnel zone boundary is rm, when the light-transmitting film in the divided are with an inner radius r that is greater than rm and smaller than rm+1.

Dependencies are inferred from the claim text.