Detection device for annular polygonal prism

The utility model discloses a detection device for an annular polygonal prism. The detection device comprises a polygonal prism, a light source and an industrial camera, according to the utility model, the prism seat provided with the octagonal hole along the axis is adopted; a planar reflecting mirror is arranged on each edge of the octagon; octagonal prism, an included angle of 45 degrees is formed between the plane where each reflecting mirror is located and the axis; a detected product is arranged on the axis of the prism table; the eight reflecting mirrors carry out information acquisition on four sides of an acquisition point of a detected product from the normal direction of the axis; eight reflecting mirrors arranged at an included angle of 45 degrees are used for reflecting alongthe axis, an industrial camera arranged along the axis is used for shooting, and the shot sample is analyzed, studied and judged, so that the appearance or the size of a product can be detected in multiple directions. The dev