Variable-magnification variable-pitch industrial image detection optical system

Abstract

The invention relates to a variable-magnification variable-distance industrial image detection optical system. The system comprises a front fixed group lens, a variable-magnification focusing group lens, a variable diaphragm, a rear fixed group lens and a compensation adjustment group lens, wherein the front fixed group lens comprises a negative meniscus lens A1, a positive meniscus lens A2 and a positive meniscus lens A3; the variable-magnification focusing group lens comprises a meniscus negative lens A4, a biconcave negative lens A5 and a meniscus positive lens A6; the rear fixed group lens comprises a positive meniscus lens B1, a negative meniscus lens B2 with focal power, a biconcave negative lens B3, a biconvex positive lens B4 and a biconvex positive lens B5; and the lens of a compensation adjusting group comprises a biconvex positive lens B6, a biconcave negative lens B7 and a biconvex positive lens B8. The system not only can carry out detection work under different focal lengths and different multiplying powers, but also can realize a full-focal-length variable object distance detection function, has an ultra-wide detection object distance range, and can be suitable for various detection environments.

Description

technical field [0001] The invention relates to a variable magnification and variable distance industrial image detection optical system. Background technique [0002] Most of the lenses used in the traditional industrial inspection field are ordinary fixed-focus lenses. This type of lens has a single detection function and a fixed magnification, making it unable to adapt to objects of different sizes; at the same time, the existence of distortion makes this type of lens easy to cause Edge distortion affects detection accuracy. Ordinary fixed-focus lenses have high requirements on the inspected environment, and usually can only be inspected in a constant temperature and stable machine environment. The scope of application is small, the range of detection object distance is narrow, and the depth of field is fixed. The object distance is fixed at magnification, which is very easy to cause interference, so it is necessary to replace different lenses for detection, which is irr...

AI Technical Summary

Problems solved by technology

[0002] Most of the lenses used in the traditional industrial inspection field are ordinary fixed-focus lenses. This type of lens has a single detection function and a fixed magnification, making it unable to adapt to objects of different sizes; at the same time, the existence of distortion makes this type of lens easy to cause Edge distortion affects detection accuracy

Ordinary fixed-focus lenses have high requirements on the inspected environment, and usually can only be inspected in a constant temperature and stable machine environment. The scope of application is small, the range of detection object distance is narrow, and the depth of field is fixed. The object distance is fixed at magnification, which is very easy to cause interference, so it is necessary to replace different lenses for detection, which is irreplaceable and increases the cost of detection equipment

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