Optical lens

Abstract

The invention provides an optical lens. The optical lens sequentially comprises a first lens, a second lens, a third lens, a fourth lens, a fifth lens and a sixth lens from an object side to an imageside. The first lens has negative focal power and a meniscus shape, the object side surface is a convex surface, and the image side surface is a concave surface; the second lens has negative focal power and a meniscus shape, the object side surface is a convex surface, and the image side surface is a concave surface; the third lens and the second lens are bonding lenses, the third lens has positive focal power and a meniscus shape, the object side surface is a convex surface, and the image side surface is a concave surface; the fourth lens has positive focal power and a biconvex shape, the object side surface is a convex surface, and the image side surface is a convex surface; the fifth lens has positive focal power and a biconvex shape, the object side surface is a convex surface, and theimage side surface is a convex surface; and the sixth lens has negative focal power and a meniscus shape, the object side surface is a concave surface, and the image side surface is a convex surface.According to the optical lens provided by the invention, the shapes of the lenses are optimally set, and the focal power of the lenses is reasonably distributed, so that the high-resolution, low-aberration, low-cost and relatively good temperature performance can be realized while the miniaturization of the lens is kept.

Description

technical field [0001] The invention relates to the field of optical lenses, in particular to an optical lens with improved imaging performance while maintaining the miniaturization of the lens. Background technique [0002] Imaging devices such as camera-mounted mobile devices and digital still cameras using, for example, charge-coupled devices (CCD) and complementary metal-oxide semiconductors (CMOS) as solid-state imaging elements are well known. [0003] In such an imaging device, an optical lens is used to acquire an image of a subject. As more and more electronic devices apply imaging functions, the requirements for optical lenses are also getting higher and higher. For example, the requirements for the resolution of optical lenses are getting higher and higher, from the original megapixels to tens of millions of pixels, and high-pixel lenses are becoming more and more popular. [0004] For example, the optical lens used in the vehicle field has very high requirement...

AI Technical Summary

Problems solved by technology

When using an aspheric surface to correct aberrations, if a plastic aspheric lens is used, due to the large thermal expansion coefficient of the plastic, the temperature performance is poor, and it cannot satisfy the perfect imaging performance in the temperature range of -40 to 85°C, and there are temperature changes. Causes out-of-focus image blur

In contrast, if a glass aspheric lens is used to ensure temperature characteristics, the cost will be too high

Images