Optical system for camera

Abstract

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.

What is claimed is: 
     
         1 . An optical system, comprising:
 a first lens having positive refractive power and being concave toward an image side;   a second lens having negative refractive power and being concave toward an image side;   a third lens being convex toward the image side;   a fourth lens having positive refractive power and comprising a meniscus shape being concave toward an object side and convex toward the image side; and   a fifth lens having negative refractive power and being concave in the center toward the image side, the fifth lens having at least one inflection point on an image-side surface and a shape being concave in the center toward the object side,   wherein the first lens, the second lens, the third lens, the fourth lens and the fifth lenses are arranged in order from the object side to the image side.   
     
     
         2 . The optical system of  claim 1 , wherein:
 the first lens is convex toward the object side, and has a meniscus shape, and   the fifth lens comprises an image side surface being concave in the center and convex at the periphery.   
     
     
         3 . The optical system of  claim 2 , wherein each surface of the first, second, third, fourth and fifth lenses comprises an aspherical surface, and the first, second, third, fourth and fifth lenses are made of plastic. 
     
     
         4 . An optical system, comprising:
 a first lens having positive refractive power and comprising a meniscus shape being convex toward an object side;   a second lens having negative refractive power and comprising a concave surface on an image side;   a third lens comprising a convex surface on the image side;   a fourth lens having positive refractive power and comprising a meniscus shape being concave toward the object side and convex toward the image side;   a fifth lens having negative refractive power and comprising:   an image-side surface being concave in the center and convex at the periphery and having at least one inflection point thereon; and   an object-side surface being concave toward the object side,   wherein:   the first lens, the second lens, the third lens, the fourth lens and the fifth lenses are arranged in order from the object side to the image side, and   the meniscus shape of the first and fourth lenses, the concave surface of the second lens and the convex surface of the third lens are arranged on an optical axis.