Optical lens

Abstract

The invention discloses an optical lens, which comprises six lenses which sequentially comprise a first lens with negative focal power, a second lens with negative focal power, a third lens with negative focal power, a fourth lens with negative focal power, a fifth lens with negative focal power and a sixth lens with negative focal power from an object side to an imaging surface, the image side surface of the second lens is a convex surface; the third lens has positive focal power, and the image side surface of the third lens is a convex surface; the object side surface of the fourth lens is a concave surface, and the image side surface of the fourth lens is a convex surface; the fifth lens has negative focal power, and the image side surface of the fifth lens is a concave surface; and the sixth lens has positive focal power. The six lenses are adopted, and through specific surface shape arrangement and reasonable focal power distribution, the lens has at least one of the advantages of long focus, miniaturization, low cost, high resolution and normal use in weak light and severe environments.

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