公开(公告)号：US20200158657A1

公开(公告)日：2020-05-21

申请号：US16622030

申请日：2018-03-17

Applicant: MACHINE VISION LIGHTING INC.

Inventor： SHIGEKI MASUMURA

IPC: G01N21/88 ,  G01N21/956 ,  G01N21/25 ,  G01N21/21 ,  G01N21/47

Abstract: Provided is an inspection lighting device with which, even when changes in light that occur at respective feature points on an object to be inspected are small, the amounts of those changes in light can be determined across the entire field-of-view range, and the feature points can be detected under exactly the same conditions. The inspection lighting device 100 includes a surface light source 1 and a lens 2 that is disposed between the surface light source 1 and an inspection object W, the lens 2 being disposed nearer to the inspection object W such that at least one of a shielding mask M1 and a filtering means F1 is located centered around a focus position of the lens. An irradiation solid angle of light emitted from the surface light source 1 and irradiated onto the inspection object W by the lens 2 is configured to have solid angle regions that have specific optical attributes and that are radially arranged around an optical axis of the irradiation solid angle. The shapes, sizes, and incline angles of irradiation solid angles of the inspection light as well as solid angle regions having specific optical attributes within the irradiation solid angles can be set to be substantially uniform across the entire field of view in accordance with changes that occur at feature points on the inspection object.