How to pronounce “collimate” in English

So state of the art laser is really a bright thing, and it's coherent, so if you use a large mirror to makea collimated beam and shine that out somewhere, then someone in that line of sight-- and let's assume they cannot distinguish our planet wherewe're transmitting this from, from our star-- will see the starlight, but during the time of the laser flash, the star will appear to get much brighter.