Patent ID: 9341817
Filing Date: 2016-05-17
CPC Classification: G02B

Claim Text:
1. An optical system comprising, in order from an object side to an image side: a first lens in a meniscus shape having a convex surface on an object side of an optical axis of the first lens; a second lens in a meniscus shape having a concave surface on an object side of an optical axis of the second lens; a third lens having a biconcave shape at an optical axis of the third lens; a fourth lens in a meniscus shape having a concave surface on an object side of an optical axis of the fourth lens; a fifth lens having at least one aspheric inflection point; and an aperture interposed between an image side of the first lens and the object side of the second lens; wherein the first lens and the fourth lens each has positive (+) refractive power, and the third lens has negative (−) refractive power; and wherein the optical system satisfies following Equation 1, in which n wherein the optical system satisfies following Equation 2, in which t