Patent ID: 8379314
Filing Date: 2013-02-19
Classification: B29D,G02B

Abstract:
1. A method for designing an image pickup lens including at least one lens formed of a material with non-homogeneity, for forming a subject image on an photoelectric conversion section of a solid-state image pickup element, the method comprising the steps of: assuming that the lens formed of the material with non-homogeneity is a lens having a structure including a plurality of layers whose refractive indexes are different from each other because of the non-homogeneity, the plurality of layers being piled up in a thickness direction of the lens; and designing a shape of at least one of (i) at least one surface of the image pickup lens and (ii) a lens-surface distance in at least one place of the image pickup lens, based on a comparison between the assumed lens and a lens having a same shape to the lens formed of the material with non-homogeneity resin and having a homogenous refractive index.