Optical system and imaging device having the same

Abstract

It provides a compact optical system with a large aperture that offers excellent optical performance from the center to the periphery of the field of view. [Solution] The optical system consists of a lens group L containing multiple lenses arranged sequentially from the object side to the image side, and a final lens Gn with negative refractive power. The image-side lens surface of the final lens has an aspherical shape that includes a concave region near the optical axis and has an inflection point. When the average refractive index of all lenses included in the lens group L is Nd, it is 1.780

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