A projection system , comprising: a light source configured to emit a light in response to an image data; an illumination optical system configured to steer the light, the illumination optical system including a first lens group and a second lens group ; and a digital micromirror device including a plurality of micromirrors, wherein a respective micromirror is configured to reflect the steered light to a predetermined location as on-state light in a case where the respective micromirror is in an on position and to reflect the steered light to a light dump as off-state light in a case where the respective micromirror is in an off position; characterized by a controller configured to: determine a deviation between an actual angle of orientation of a respective micromirror of the plurality of micromirrors of the digital micromirror device and an expected angle of orientation of the respective micromirror of the plurality of micromirrors of the digital micromirror device, calculate a first amount of lateral adjustment corresponding to the first lens group and a second amount of lateral adjustment corresponding to the second lens group , and actuate the first lens group in a first direction according to the first amount and the second lens group in a second direction according to the second amount, thereby to maintain a position of the steered light on the digital micromirror device. a light source configured to emit a light in response to an image data; an illumination optical system configured to steer the light, the illumination optical system including a first lens group and a second lens group ; and a digital micromirror device including a plurality of micromirrors, wherein a respective micromirror is configured to reflect the steered light to a predetermined location as on-state light in a case where the respective micromirror is in an on position and to reflect the steered light to a light dump as off-state light in a case where the respective micromirror is in an off position; characterized by a controller configured to: determine a deviation between an actual angle of orientation of a respective micromirror of the plurality of micromirrors of the digital micromirror device and an expected angle of orientation of the respective micromirror of the plurality of micromirrors of the digital micromirror device, calculate a first amount of lateral adjustment corresponding to the first lens group and a second amount of lateral adjustment corresponding to the second lens group , and actuate the first lens group in a first direction according to the first amount and the second lens group in a second direction according to the second amount, thereby to maintain a position of the steered light on the digital micromirror device. determine a deviation between an actual angle of orientation of a respective micromirror of the plurality of micromirrors of the digital micromirror device and an expected angle of orientation of the respective micromirror of the plurality of micromirrors of the digital micromirror device, calculate a first amount of lateral adjustment corresponding to the first lens group and a second amount of lateral adjustment corresponding to the second lens group , and actuate the first lens group in a first direction according to the first amount and the second lens group in a second direction according to the second amount, thereby to maintain a position of the steered light on the digital micromirror device. <EOS>