optical lens

Abstract

The invention provides an optical lens. The optical lens comprises in turn from the object side to the image side: a first lens with negative refractive power and a meniscus shape, the object side is convex and the image side is concave; the second lens has negative refractive power and a meniscus shape, The object side is convex, and the image side is concave; the third lens, which is a cemented lens with the second lens, has positive power and a meniscus shape, the object side is convex, and the image side is concave; the fourth lens has positive power and biconvex shape, convex on the object side and convex on the image side; fifth lens, having positive power and biconvex shape, convex on the object side and convex on the image side; and sixth lens, meniscus with negative power The shape is concave on the side of the object and convex on the side of the image. The optical lens provided by the invention can achieve high resolution, low aberration, low cost and better temperature performance while keeping the lens miniaturized by optimizing the shape of each lens and reasonably allocating the optical power of each lens.

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

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