Patent ID: 7643125

Claim:
An exposure apparatus which exposes a substrate, comprising: a projection optical system which includes a first optical element and a second optical element and is configured to project a pattern of an original onto the substrate; a first driving mechanism configured to drive said first optical element; a second driving mechanism configured to drive said second optical element; and a control unit configured to control said first driving mechanism and said second driving mechanism so as to adjust astigmatism of said projection optical system, wherein an amount of change in a first order component of the astigmatism and an amount of change in a second order component of the astigmatism upon driving said first optical element by said first driving mechanism hold a first relationship, an amount of change in the first order component of the astigmatism and an amount of change in the second order component of the astigmatism upon driving said second optical element by said second driving mechanism hold a second relationship different from the first relationship, and the first optical element deforms upon being driven by said first driving mechanism so that the astigmatism changes, and said second optical element deforms upon being driven by said second driving mechanism so that the astigmatism changes.