Lens, imaging device, and light-emitting device

The present technology relates to a lens, an imaging device, and a light-emitting device capable of achieving isotropy of optical characteristics and high diffraction efficiency in a peripheral region that is a region away from the optical center of the lens. There is provided a superlens including: a central region located at a central portion; and a plurality of annular peripheral regions located around the central region. In the superlens, the pattern in the peripheral region has a constant interval in the angular direction, the angular interval [Delta] [theta] k: [Delta] [theta] k + 1 is an integer ratio Mk: Mk + 1, where [Delta] [theta] k represents an angular interval in the k-th peripheral region from the inner side, and [Delta] [theta] k + 1 represents an angular interval in the (k + 1)-th peripheral region from the inner side, where [Delta] [theta] k represents an angular interval in the k-th peripheral region from the inner side, and [Delta] [theta] k + 1 represents an angular interval in the k + 1-