360-DEG inner hole annular field-of-view optical system

Abstract

The invention discloses an optical system. A first lens is a dual-convex positive lens, a second lens and a fifth lens are convex-concave negative lenses, and an opening of each of the second lens andthe fifth lens is towards an image plane; the third lens and the fourth lens are dual-convex positive lenses; the sixth lens is the concave-convex negative lens and the opening is towards an object plane; the seventh lens and the eighth lens are dual-convex positive lens, the adjacent center distance of the first lens and the second lens is 0.3mm; the adjacent center distance of the second lens and the third lens is 1.5mm; the adjacent center distance of the fourth lens and the fifth lens is 21.2mm; the adjacent center distance of the fifth lens and the sixth lens is 66.3mm; the adjacent center distance of the sixth lens and the seventh lens is 0.3mm; the adjacent center distance of the seventh lens and the eighth lens is 0.3mm; and the adjacent center distance of the eighth lens and a target surface is 23.28mm. The system can provide a 360-DEG inner hole annular field-of-view optical system which is reasonable in structure, precise and convenient for hole internal detection, and suitable for the small-size object observation.

Description

technical field [0001] The invention relates to the field of optical technology, in particular to a 360-degree inner hole annular field of view optical system. Background technique [0002] Machine vision is widely used in industrial inspection, automation, electronic communication, semiconductor, biomedical, scientific research and other fields. The industrial field is the field with the largest proportion of machine vision applications. Intensified competition in the manufacturing industry and cost pressures force companies to pay attention to production efficiency, which will promote the application of machine vision technology. In machine vision, it is difficult for ordinary optical lenses to detect the internal information of objects. Especially small-sized objects, due to their own size limitations, it is more difficult for ordinary optical lenses to detect them. This technical solution is developed and designed for the detection of objects with holes, cavities, and t...

AI Technical Summary

Problems solved by technology

The industrial field is the field with the largest proportion of machine vision applications. Intensified competition in the manufacturing industry and cost pressures force companies to pay attention to production efficiency, which will promote the application of machine vision technology. In machine vision, it is difficult for ordinary optical lenses to detect the internal information of objects. Especially small-sized objects, due to their own size limitations, it is more difficult for ordinary optical lenses to detect them

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