Patent ID: 9690080
Date: 2017-06-27
CPC Classifications: G02B

Claim:
1. A wide angle lens comprising: a first lens which comprising a first lens convex surface directed to an object side and a first lens concave surface directed to an image side, the first lens having a negative power; a second lens provided on the image side of the first lens, the second lens comprising a second lens concave surface directed to the image side, the second lens having a negative power; a third lens provided on the image side of the second lens, the third lens comprising a third lens convex surface directed to the image side, the third lens having a positive power; a fourth lens provided on the image side of the third lens, the fourth lens comprising a fourth lens convex surface directed to the image side, the fourth lens having a positive power; a fifth lens provided on the image side of the fourth lens, the fifth lens comprising a first fifth lens concave surface directed to the object side and a second fifth lens concave surface directed to the image side, the fifth lens being a plastic lens having a negative power; a sixth lens provided on the image side of the fifth lens, the sixth lens comprising a first sixth lens convex surface directed to the object side and a second sixth lens convex surface is directed to the image side, the sixth lens being a plastic lens having a positive power; and a diaphragm disposed between the third lens and the fourth lens; wherein the fifth lens and the sixth lens constitute a cemented lens; wherein the wide angle lens is a fixed focal length lens; and wherein the wide angle lens satisfies the following conditions (1) and (2): wherein an effective focal length of the entire wide angle lens is “f