High-resolution ultra-wide-angle lens suitable for intelligent access control

An optical system of the lens is composed of a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens and a sixth lens, the first lens is a meniscus negative lens, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface; the second lens is a biconcave negative lens, the object side surface is a concave surface, and the image side surface is a concave surface; the third lens is a meniscus positive lens, the object side surface is a concave surface, and the image side surface is a convex surface; the fourth lens is a biconvex positive lens, the object side surface is a convex surface, and the image side surface is a convex surface; the fifth lens is a meniscus negative lens, the object side surface is a convex surface, and the image side surface is a concave surface; the sixth lens is a biconvex negative lens, the object side surface of the sixth lens is a convex surface, the image side surface of the sixth lens