Patent ID: 11280744

Abstract:
Accuracy of detecting abnormalities on the surface of a workpiece is improved. An appearance inspection apparatus for inspecting the appearance of a workpiece is provided. The appearance inspection apparatus for inspecting the appearance of the workpiece includes a first lighting unit that irradiates the workpiece with light, a first imaging unit that images the workpiece irradiated by the first lighting unit, a first detection unit that detects a first defect from an image captured by the first imaging unit, a second lighting unit that irradiates the workpiece with light, a second imaging unit that images the workpiece irradiated by the second lighting unit, and a second detection unit that detects a second defect from an image captured by the second imaging unit. The first lighting unit uses coaxial epi-illumination, and the second lighting unit uses coaxial epi-illumination and dome illumination.