In an embodiment, a scanning optical system comprises first and second optical sources for providing and a deflector device. The first and second optical sources provide first and second beams, respectively, of optical radiation. The deflector device is disposed to receive and deflect the first and second beams, and is configured for a scanning operation on a beam of radiation traversing the deflector the device. The first beam is incident on the deflector device with a first orientation and the second beam is incident on the deflector device with a second orientation that is different from the first orientation.
