Image pickup device
AssigneeSony Corporation
InventorMasanori Iwasaki
Life of this patent
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Abstract
In an image pickup device, a single refractive index distribution lens having a refractive index distribution which is substantially proportional to the square of the distance from an optical axis in a cross-section vertical to the optical axis is provided as an imaging lens in the neighborhood of the imaging face of an image pickup element. Specifically, the positional relationship between the image pickup element and the lens is fixed by adhesion of organic solvent or the like. Further, an infrared-ray cut filter is formed on the light incident face of the refractive index distribution lens.
Claims7
An image pickup device, characterized in that a refractive index distribution lens having a refractive index distribution which is inversely proportional to the square of the distance from the optical axis in a cross-section vertical to the optical axis is provided as an imaging lens in the neighborhood of an imaging face of an image pickup element.
Dependencies are inferred from the claim text.