Patent ID: 6323889
Filing Date: 2001-11-27
Classification: G02B,H04N

Abstract:
An exposure apparatus comprising:a plurality of light sources for emitting light beams, respectively;light path alignment mirrors for synthesizing the light beams from the light sources together, such that the light beams are spaced apart from one another by predetermined distances in a first direction;a deflection device for deflecting the light beams, emitted from the light sources and synthesized by the light path alignment mirrors, in a second direction perpendicular to the first direction;a drift detection sensor for sensing at least one of the light beams emitted from the light sources and deflected by the deflection device, and for detecting how a given light path alignment mirror is drifted in the first direction; andlight path alignment mirror-driving units for correcting a drift of each of the light path alignment mirrors in accordance with a drift detected by the drift detection sensor.