| 摘要 |
An optical system according to an embodiment comprises: a first lens, a second lens, a third lens, a fourth lens, and a fifth lens arranged from the top of an object in order and satisfies an equation 1, ¦Sag 2/Sag 1¦ < 2, and an equation 2,¦H5/Sag 5¦ > 1. In equation 1, Sag 1 is the Sag value of the surface of the first lens in an object side, and Sag 2 is the Sag value of the surface of the first lens in an image side. In equation 2, H5 is the height of an inflection point on the surface of the fifth lens in the image side, and Sag 5 is the Sag value of the inflection point on the surface of the fifth lens in the image side. |
