A detector module for a CT imaging system is provided. The control signal may be transmitted to the signal processing device as an infrared or RF signal that is received and decoded by the signal processing device. It is shown how these constructs can be effectively supported with simple and inexpensive instruction set and micro-architectural extensions. A topical composition precursor and methods for manufacturing and using a topical composition are provided by the invention. The method includes determining diffraction orders associated with an ideal mask of a pattern to be printed by the lithography system, and then configuring the states of the SLM pixels to match all the diffraction orders that are relevant in the image formation. Still other optical devices use diffusely reflecting polarizers to recycle light and improve display illumination.