Patent ID: 6757052
Filing Date: 2004-06-29
Classification: G03F

Abstract:
An apparatus for exposing an object with a light, comprising:A) a means for producing a light beam having a uniform intensity distribution; B) a first refracting means for refracting the light beam into a plurality of divergent light beams about an optical axis; C) a second refracting means positioned at a distance d1 from the first refracting means for refracting the plurality of divergent light beams into a plurality of parallel light beams about the optical axis; D) a third refracting means for refracting the plurality of parallel light beams into a double number of divergent light beams about the optical axis; E) a fourth refracting means positioned at a distance d2 from the third refracting means for refracting the double number of divergent light beams into a same double number of parallel light beams about the optical axis; F) a fifth refracting means for refracting the same double number of parallel light beams in a broken annular pattern about the optical axis at a second radius greater than a first radius of the same double number of parallel light beams about the optical axis; G) a sixth refracting means positioned at a distance d3 from the fifth refracting means, for refracting the same double number of parallel light beams refracted in the broken annular pattern into the same double number of parallel light beams about the optical axis at a third radius greater than the first radius of the same double number of parallel light beams about the optical axis; H) a first controlling means for controlling a relative displacement between the first refracting means and the second refracting means; I) a second controlling means for controlling a relative displacement between the third refracting means and the fourth refracting means; J) a third controlling means for controlling a relative displacement between the fifth refracting means and the sixth refracting means; and K) a means for exposing the object with light of the same double number of parallel light beams refracted in the broken annular pattern from the sixth refracting means.