An ultra-low-distortion large-target dual-telecentric optical system

Abstract

This invention belongs to the field of high-precision visual measurement and feature recognition technology, specifically relating to an ultra-low distortion large-target dual telecentric optical system. It includes four lens tubes connected sequentially, with their axes coincident. Lens tube four, located away from lens tube three, has a C-interface connected to its opposite end. Lens tube one and lens tube two are mounted inside lens tube one, away from lens tube two. Lens tube three is mounted on the side of lens tube three closest to lens tube two. Lens tube four is mounted on the side of lens tube four closest to the C-interface. All four lenses are circular convex lenses with coincident axes. A cemented sheet is mounted on the side of lens tube three closest to lens tube four, and an aperture stop is installed inside lens tube three, between the cemented sheet and lens tube three. This system ensures stable magnification between the output image and the actual object, guaranteeing that the repeatability accuracy of visual size detection is not limited by the object's position within the field of view.

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