Patent ID: 8488117

Claim:
An inspection system, comprising: a sensor; a mechanical module arranged to alter a distance between an inspected object and the sensor at a rate that is lower than a first rate; a first focusing unit arranged to receive a first beam and to apply a first focusing function along a first direction to provide a second beam, wherein the first focusing unit is arranged to alter the first focusing function at a rate that exceeds the first rate; and a traveling lens acousto-optic device arranged to generate a plurality of traveling lenses in response to radio frequency signals, wherein each traveling lens of the plurality of traveling lenses is arranged to receive at least a portion of the second beam and to apply a second focusing function along a second direction to generate a plurality of focused spots and the traveling lens acousto-optic device is arranged to alter the second focusing function at a rate that exceeds the first rate; and optics arranged to direct the plurality of focused spots on the inspected object and to direct radiation from the inspected object to the sensor.