Patent ID: 7379230

Claim:
A method, comprising: forming a beam of light; directing said beam of light along an optical path; first modifying said beam of light using a motor controlled device to make a first modification to said beam of light; second modifying said beam of light using a second motor controlled device to make a second modification to said beam of light that is different than said first modification; and controlling said first modifying and said second modifying over a motor control bus which is a single electrical bus to which both said first motor controlled device and said second motor controlled device are connected, said controlling being carried out in a format that allows sending a first part of a command indicative of a function over said motor control bus, and a second part of said command indicative of data associated with said function also over said motor control bus, where said first part is in a first time slot within said command and is interpreted by first determining said first time slot and interpreting said first part based on said first determining, and said second part is in a second time slot within said command, and where said second time slot is different than said first time slot, and said second part is interpreted in a different way than said first part.