Projection system and method adopting folding reflector and integral rod for adjustment

A projection system and calibration method therefore involve: a light source configured to emit light in response to image data; an illumination optical system configured to turn the light, the illumination optical system including a folding mirror and an integrating rod; a digital micromirror device (DMD) including a plurality of micromirrors respectively configured to reflect the diverted light as on-state light to a predetermined position or to reflect the diverted light as off-state light to the light collector; determining a deviation between an actual orientation angle and an expected orientation angle of a respective micromirror of the plurality of micromirrors; a first rotational adjustment amount corresponding to the folding mirror and a second lateral adjustment amount corresponding to the integration rod are calculated, and the folding mirror and the integration rod are actuated according to the corresponding first and second amounts. 一种投影系统和校准方法因此涉及：光源，被配置为响应于图像数据而发射光；照明光学系统，被配置为使该光转向，该照明光学系统包括折叠反