Optical system and camera module

Abstract

An optical system disclosed in an embodiment of the invention comprises first to third lenses aligned along an optical axis from an object toward an image sensor, and an optical filter disposed between the second and third lenses, wherein a power of the first lens is negative, and at least one spherical lens adjacent to the object and at least one aspherical lens adjacent to the image sensor among the first to third lenses are includes, the number of spherical lenses among the first to third lenses is greater than the number of aspherical lenses, a center distance between the first lens and the second lens is greater than a center thickness of the first lens, the second lens has a shape in which both sides are convex on the optical axis, and the refractive index of the first to third lenses may be less than 1.9.

Dependencies are inferred from the claim text.