1. A multisource infrared spectrometer, comprising: a source of broad band infrared energy, an intercepting mirror that receives the infrared energy, a first object mirror that reflects the infrared energy from the intercepting mirror, a spatial light modulator that receives the reflected infrared energy and reflects it back to the first object mirror, the spatial light modulator including deformable mirror elements, and a controller that deforms the mirror elements according to a predetermined pattern.