Patent ID: 7590279

Claim:
An appearance inspection apparatus which inspects an electronic board comprising: a first scanning unit which scans a first surface of the electronic board by being moved relative to the electronic board; a second scanning unit which is provided opposite to the first scanning unit, sandwiching the electronic board, and which scans a second surface of the electronic board by being moved relative to the electronic board; and a moving unit which moves the first scanning unit, the second scanning unit and the electronic board relative to each other, a first illuminating unit which illuminates the electronic board in order for the first scanning unit to scan the electronic board; and a second illuminating unit which illuminates the electronic board in order for the second scanning unit to scan the electronic board, wherein the first illuminating unit and the second illuminating unit synchronously illuminate the electronic board in association with each scanning unit illuminating different locations offset from each other in a direction of relative movement of the electronic board with respect to the first and second scanning units.