Optical system for camera

摘要

Disclosed herein is an optical system for a camera. The optical system for a camera includes: a first lens having positive refractive power and a meniscus shape concave toward an image; a second lens having negative refractive power and a shape concave toward the image; a third lens having the positive refractive power and a shape convex toward an object; a fourth lens having the positive refractive power and a shape convex toward the image; and a fifth lens having the negative refractive power, a shape convex toward the object and concave to the image, and one or more inflection point provided on an image surface.

主权项

1. An optical system, comprising:
a first lens having positive refractive power of which an object-side surface is convex and an image-side surface is concave; a second lens having negative refractive power and being convex toward the object side and concave toward an image side; a third lens having positive refractive power and an image-side of the third lens is convex in a paraxial region; a fourth lens having a refractive power and being concave toward the object side and convex toward the image side; and a fifth lens having a refractive power and being convex toward the object side, the fifth lens comprising an image-side surface being concave in the center and convex at the periphery, wherein: one or more inflection points are formed on the image-side surface of the fifth lens, the first lens, the second lens, the third lens, the fourth lens and the fifth lens are arranged in order from the object side toward the image side, a thickness of the fifth lens is thicker than the first lens, the second lens, the third lens, and the fourth lens, and a radius R31 of curvature of an object-side surface of the third lens and a focal length f of the optical system satisfy the following conditional expression:
R31/f<1.2 wherein the optical system satisfies the following conditional expression: f2