Patent ID: 6891612

Claim:
An optical inspection device that detects holes in an object to be inspected, comprising: a light source that emits an illumination light from light-emitting points in a linear or planar pattern in order to illuminate said object to be inspected; a fluorescent member that is disposed on the opposite side from light sources across said object to be inspected, and has an incident surface on which the portion of the illumination light that is emitted from said light source that passes through holes in said object to be inspected falls incident, and a detection surface from which fluorescent light that is generated with the incidence of said illumination light is emitted; and a photodetector that detects the fluorescent light that is emitted from said detection surface of said fluorescent member; wherein a light-shielding member that does not allow the passage of said illumination light is provided on a surface other than said incident surface of said fluorescent member.