thin lens

Abstract

The invention relates to a thin lens which comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens from an object side to an image side along an optical axis. The first lens is a convex-concave lens with negative refractive power, the convex surface of the first lens faces the object side, and the concave surface of the first lens faces the image side. The second lens is a lens with positive refractive power. The third lens is a double-concave lens with negative refractive power. The fourth lens is a double-convex lens with positive refractive power. The fifth lens is a concave-convex lens with negative refractive power, and the convex surface of the fifth lens faces the image side.

Description

technical field [0001] The present invention is related to image capture, in particular to a thin lens. Background technique [0002] In recent years, portable electronic products have gradually become smaller and lighter in order to be convenient for people to carry and use, and the image capture lenses used therein must also be smaller and lighter. In addition to miniaturization and light weight, the image capture lens still needs to have good optical performance in order to present high image quality. Therefore, miniaturization, light weight and high optical performance are indispensable elements for image capture lenses. [0003] In order to achieve the above goals, image capture lenses began to use aspheric plastic lenses. From the beginning, one or two aspheric plastic lenses were used, and now some of them all use aspheric plastic lenses. A large number of aspheric plastic lenses are used in Image capture lens design has become a trend. [0004] The currently devel...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a thin lens with a smaller aperture value (F-number) and a larger viewing angle (Field ofView) and short total lens length (Total Track), still has good optical performance, and can be mass-produced, with both thinness and high optical performance

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