this embodiment one or more of lenses 22 24 and 26 may be moved along the optical axis 21 this movement allows adjustment of the beam expansion of the optical system in fig3 lenses 22 24 and 26 are adjusted such that the output beam is narrow although still wider than the input beam while in fig4 lenses 22 24 and 26 are adjusted such that the output beam is wide the system illustrated in fig3 and 4 utilizes a negative lens 22 and two positive lenses 24 and 26 however other optical systems using any number of lenses are possible without detracting from the intent of the invention it is also possible to use holographic lenses or reflective systems or a gradient beam splitter to achieve beam expansion the movement of one or more lenses 22 24 and 26 along the optical axis and thus the amount of beam expansion may be achieved using stepper motors linear actuators servo motors or other mechanisms as well known in the art laser module 20 may contain a single laser of a single color or may contain an array of lasers in multiple colors for example red green and blue lasers fig5 illustrates an automated luminaire.