CONDENSING ELEMENT, CONDENSING ELEMENT GROUP, AND SOLID-STATE IMAGING DEVICE

摘要

A condensing element which comprises one or more first ring zones (102) having a first refractive index, and one or more second ring zones (103) having a second refractive index different from the first refractive index, and in which the first ring zones (102) and the second ring zones (103) are concentrically arranged so as to be alternately adjacent, wherein at least one of the first ring zones (102) or the second ring zones (103) has a gap (104) in a portion in which the width of the ring zone gradually narrows down.