1. An illumination system comprising: a light source for generating an illumination signal; one or more optical elements aligned to direct a portion of light of the illumination signal; a light detector positioned to receive light directed from the one or more optical elements and the light detector generates an output signal based on the light directed from the optical element; and control circuitry connected to monitor the output signal of the light detector for detection of a change in a configuration position of one or more elements of the illumination system.