An analytical model for crosstalk is developed for an infrared scene p
rojector that utilizes a deformable-mirror device as an infrared spati
al light modulator. Partial-coherence effects that result from the phy
sical layout of the projection system are included. Crosstalk is deter
mined by defining a crosstalk ratio in the projected image. Crosstalk-
ratio calculations are carried out for monochromatic and blackbody pro
jection sources over the 3- to 5-mum wavelength band. The results pred
ict crosstalk ratios of 260:1, 1200:1, and 2400:1 for deformable-mirro
r pixels of 50, 100, and 150 mum when a blackbody source is used in th
e projection system. Crosstalk performance is improved at shorter wave
lengths and for larger deformable-mirror pixels. The results of a proo
f-of-principle experiment are included to verify the feasibility of a
deformable-mirror device in the projection system.