Optical lens

Abstract

The invention discloses an optical lens. A first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens and a tenth lens are sequentially arranged on a common optic axis straight line from object space to image space, a diaphragm is arranged between the third lens and the fourth lens, and the fifth lens, the sixth lens and the seventh lens form a triplet lens for reducing chromatic aberration generated by confocal phenomenon of visible light and infrared light.

Description

【Technical field】 [0001] The invention relates to an optical lens, which is a novel security monitoring imaging optical lens for shooting white / night scenes. 【Background technique】 [0002] At present, security monitoring lenses are used more and more widely, but the security lenses currently used often have a small image size and a short focal length, so they cannot form a larger image area and cannot effectively capture objects with a longer object distance. [0003] And at night, although the lens used during the day can receive infrared light, it cannot effectively focus on the image plane, resulting in no imaging at night. However, a small amount of confocal lenses of visible light and infrared light appearing on the market often use more lenses and the price of glass materials is higher, thus limiting the widespread use of such lenses. 【Content of invention】 [0004] The invention overcomes the shortcomings of the prior art and provides an imaging optical lens with ...

AI Technical Summary

Problems solved by technology

[0002] At present, security monitoring lenses are used more and more widely, but the security lenses currently used often have a small image size and a short focal length, so they cannot form a larger image surface and cannot effectively capture objects with a longer object distance.

[0003] And at night, although the lens used durin

Images