Patent ID: 6750947
Filing Date: 2004-06-15
Classification: G02B,G03F

Abstract:
A driving device comprising:a first member; an annular second member arranged outside said first member; an annular first plate for connecting said first and second members to each other; and an annular second plate for connecting said first and second members to each other, wherein said first and second members are moved relative to each other by supplying or exhausting a fluid into or from a space surrounded by said first and second members and said first and second plates, and at least one of (i) an inner diameter a1 of a portion of said second member at which said second member is connected to said first plate is different from an inner diameter a2 of a portion of said second member at which said second member is connected to said second plate and (ii) an outer diameter b1 of a portion of said first member at which said first member is connected to said first plate is different from an outer diameter b2 of a portion of said first member at which said first member is connected to said second plate.