Patent ID: 8511870

Claim:
An apparatus comprising a radiation source assembly that is a modular unit and includes: a radiation source that generates radiation, and emits the radiation approximately in a first direction; a radiation guide having an input port and an output port, said radiation guide supplying radiation from said input port to said output port; and support structure supporting said radiation source near said input port of said radiation guide in a manner so that radiation emitted by said radiation source in approximately said first direction travels to and enters said input port, and so that said radiation source is positionally adjustable toward and away from said input port respectively in said first direction and in a second direction opposite said first direction; wherein said radiation source that emits radiation in said first direction is a first radiation source, and said input port that receives radiation from said first radiation source is a first input port; wherein said radiation guide has a second input port, and supplies to said output port a mixture of radiation from said first and second input ports; wherein said assembly includes a second radiation source that generates radiation, and emits the radiation approximately in a third direction; and wherein said support structure adjustably supports said second radiation source near said second input port in a manner so that radiation emitted by said second radiation source in approximately said third direction travels to and enters said second input port, and so that said second radiation source is positionally adjustable toward and away from said second input port in said third direction and in a fourth direction opposite said third direction.