Wide-angle high-definition machine vision lens

Abstract

The present invention provides a wide-angle high-definition machine vision lens. The lens comprises a focusing set and a fixing set; the focusing set comprises a first lens having positive focal power, a second lens having negative focal power and a third lens having negative focal power which are arrange in order from an object side to an image side along an optical axis; and the fixing set comprises a fourth lens having a positive focal power, a fifth lens having positive focal power, a sixth lens having negative focal power, a seventh lens having positive focal power, an eighth having positive focal power and a ninth lens having negative focal power which are arranged in order from the object side to the image side along the optical axis. Through adoption of the mode of grouping focusing, the lens ensures good imaging quality effect under object distance from 0.1mm to infinite distance, the distortion is less than 1%, and the relative illumination of the optical system marginal ray is more than 70%; the supporting field angle is larger than 70 degrees; and the wide-angle high-definition machine vision lens can ensure that resolution satisfies imaging requirements when usage in the environment of -40-70 DEG C.

Description

technical field [0001] The invention relates to the technical field of optical lenses, in particular to a wide-angle high-definition machine vision lens. Background technique [0002] Machine vision lenses are widely used in manufacturing, quality inspection, logistics, medicine, scientific research and other fields. With the implementation of the Made in China 2025 strategy, industrial automation is developing rapidly, and machine vision lenses occupy an important position as the "eyes" of automated machines. [0003] Machine vision lenses are generally used to monitor and detect targets within a specific range at a fixed position, which requires the lens to have the characteristics of small footprint, large field of view, low distortion, and high image quality. Traditional machine vision lenses adopt a double Gaussian structure, which is difficult to guarantee the imaging quality of the peripheral field of view when the field of view exceeds 45°. Contents of the inventi...

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Problems solved by technology

[0004] The invention provides a wide-angle high-definition machine vision lens, which solves the technical problems of small field of view range, poor imaging quality, and high distortion of traditional lenses

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