Optical imaging lens group and imaging system

Abstract

The invention discloses an optical imaging lens group and an imaging system, and the optical imaging lens group comprises a first lens to a ninth lens. The first lens and the eighth lens which have positive refractive power, and the object side surfaces and the image side surfaces of the first lens and the eighth lens are convex surfaces and concave surfaces respectively; the second lens and the fifth lens have positive refractive power, and the object side surfaces of the second lens and the fifth lens are convex surfaces; the third lens, the fourth lens and the ninth lens have negative refractive power, and object side surfaces and image side surfaces of the third lens, the fourth lens and the ninth lens are convex surfaces and concave surfaces respectively; the sixth lens has positive refractive power, and the object side surface and the image side surface of the sixth lens are respectively a concave surface and a convex surface; the object side surface and the image side surface of the seventh lens are a convex surface and a concave surface respectively; the optical imaging lens group satisfies the following relational expressions that TTL / f is larger than 1.0 and smaller than 2.0; wherein TTL represents the total optical length of the optical imaging lens group, and f represents the focal length of the optical imaging lens group. According to the invention, the optical imaging lens group not only has an imaging effect which can be achieved by multiple lenses, but also can ensure stable optical performance, so that high imaging quality is provided, and meanwhile, the light and thin market requirements are met.

Description

technical field [0001] The invention relates to the technical field of optical imaging, in particular to an optical imaging lens group and an imaging system. Background technique [0002] With the vigorous development of smart phones, people cannot do without smart phones in their work and life. Especially with the increasing popularity of new media industries such as short videos, smart phones are required to be more portable and lighter. Therefore, smart phones And the miniaturization requirements of the imaging system carried in it are getting higher and higher. [0003] Since the greater the number of lenses, the higher the manufacturing cost and difficulty of the imaging system, so the current imaging system usually does not exceed seven lenses. However, the imaging effect of the seven-chip imaging system has been difficult to meet today's market demand. Therefore, how to ensure the stability of the imaging system while increasing the number of lenses to meet the mark...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides an optical imaging lens group and an imaging system to solve the problem of poor stability of the imaging system with more than seven lenses in the prior art

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