Abstract: A laser beam intensity modulation system has a variable delay circuit that is used to control the relative delay in the delivery of a video signal between two cascaded AOM's. This delay circuit is controlled by a delay controller that monitors the intensity modulation of the laser beam to provide feedback control. This system maximizes the rise and fall times of the beam to generate precise beam modulation required for high speed image setters.

Abstract: A system for forming optical beam spots of different sizes on an imaging surface, includes an emitter configured to emit an optical beam along a path. The optical beam is focused at a first focus point and impinges upon the imaging surface downstream of the first focus point. A lens, having a single fixed magnification other than one, is located between the first focus point and the imaging surface so as to be in the optical path of the optical beam. The lens is moveable between a first position located a first distance from the first focus point and a second distance from a second focus point of the optical beam which is downstream of the lens and a second position located the second distance from the first focus point and the first distance from the second focus point.

Abstract: A system for forming optical beam spots of different sizes on an imaging surface, includes an emitter configured to emit an optical beam along a path. The optical beam is focused at a first focus point and impinges upon the imaging surface downstream of the first focus point. A lens, having a single fixed magnification other than one, is located between the first focus point and the imaging surface so as to be in the optical path of the optical beam. The lens is moveable between a first position located a first distance from the first focus point and a second distance from a second focus point of the optical beam which is downstream of the lens and a second position located the second distance from the first focus point and the first distance from the second focus point.