Large-aperture multi-configuration near-infrared band industrial imaging lens

Abstract

The invention discloses a large-aperture multi-configuration near-infrared band industrial imaging lens. The large-aperture multi-configuration near-infrared band industrial imaging lens comprises 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 in sequence from an object side to an image side along an optical axis. The invention relates to a large-aperture optical industrial lens with the focal length of 16 mm, the wavelength of 900-1700 nm and the F of 0.9, and the lens can realize clear imaging by adjusting the back focal length and the distance between Ld and Le when the object distance is 150, 250, 350, 500 and 600.

Description

technical field [0001] The invention relates to a near-infrared optical lens, in particular to an industrial lens with a focal length of 16mm and which can switch between five object distances of 150, 250, 350, 500 and 600 for imaging. Background technique [0002] Since my country has achieved explosive growth in the field of machine vision since 2010, industrial cameras and lenses have also maintained a growth rate of 40%, making the market demand a large number of high-quality industrial lenses. The lenses of different bands are also constantly developing, and the demand is also increasing, and the near-infrared lens is one of them. [0003] NIR lenses do not operate in the visible spectrum, so the resulting image is slightly different than when using a standard zoom system. Standard lens resolution limits for NIR lenses are based on an assumed average wavelength of 0.5 microns and are inversely proportional to wavelength. Therefore, substituting a wavelength of 1.5 mic...

AI Technical Summary

Problems solved by technology

[0005] However, the existing near-infrared lenses all have the defect that the switching object distance is small, and improvement is urgently needed

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