Wide-viewing-angle optical imaging lens system

Abstract

The invention discloses a wide-viewing-angle optical imaging lens system which comprises a first lens having negative refractive power, wherein the image side surface of the first lens is a concave surface; a second lens having positive refractive power; a third lens having negative refractive power, wherein the object side surface and the image side surface of the third lens are concave surfaces;a fourth lens having positive refractive power, wherein the object side surface of the fourth lens is a concave surface near the optical axis and comprises at least one convex surface in the off-axisposition; a fifth lens having refractive power; and a sixth lens having refractive power, wherein the object side surface is a convex surface in the optical axis, the image side surface is a concavesurface in the optical axis, and the object side surface and the image side surface respectively comprise at least one point of inflexion. The first lens, the second lens, the third lens, the fourth lens, the fifth lens and the sixth lens are arranged from the object side to the image side in turn and meet the relational expressions: AG45<0.3, AG56<0.3 and SAG42-SAG41>0.3. The reasonable surface structure and space distribution between the lenses are adopted, the total length of the system can be effectively limited under the condition of wide viewing angle, and the aperture is large so that more quantity of incident light can be realized in imaging and the imaging quality can be enhanced.

Description

technical field [0001] The invention relates to the field of optical technology, in particular to a wide viewing angle optical imaging lens system. Background technique [0002] With the recent rapid development of technology, especially electronic technology, mobile and portable electronic devices have been rapidly popularized. The popularization of electronic devices has resulted in vigorous development of modules such as optical imaging lenses and sensors included therein. At the same time, the application of imaging modules has been more and more widely used, such as smart phones, tablet computers, driving recorders, sports cameras, etc., which are now highly popular. While bringing great convenience to life, people's requirements for mobile electronic device terminals are getting higher and higher, and they are constantly pursuing more convenient, efficient and high-quality mobile experience, which requires mobile terminals to be thinner, lighter and more portable. In...

AI Technical Summary

Problems solved by technology

The traditional four-element and five-element lens structures have limitations in terms of refractive power distribution, aberration astigmatism correction, sensitivity distribution, etc., and cannot further meet higher-level imaging requirements

The current mainstream is the further developed six-piece wide-angle imaging optical lens group, but the increase in the number of lenses increases the total length of the lens, which cannot effectively suppress the total length of the lens group

For example, as shown in US Patent No. US20150177484A1, although its F.no aperture value reaches 2.0, which ensures a large amount of light entering the system, its total length cannot be effectively suppressed, reaching 10mm. Furthermore, its field of view The maximum is only 100°, which cannot meet the needs of modern mobile electronic devices for a large field of view in terms of performance; another example is the patent of the US Patent Publication No. US9488806. The total length of the system far exceeds 10mm, which cannot meet the needs of miniaturization, and it uses glass materials, which have high requirements for molding, which is not conducive to large-scale mass production

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