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    • 73. 发明授权
    • Apparatus for regulating the optical characteristics of a projection
optical system
    • 用于调节投影光学系统的光学特性的装置
    • US4676614A
    • 1987-06-30
    • US744175
    • 1985-06-13
    • Koichi Ohno
    • Koichi Ohno
    • H01L21/30G03F1/62G03F7/20H01L21/027G03B3/10
    • G03F7/70241G03F7/70883
    • An optical apparatus for projecting a pattern on a first plane onto a second plane comprises a projection optical system disposed between the first plane and the second plane to form an imaging optical path, a structure for forming a space independent from the ambient space and filled with a gas between the first plane and the second plane in such a manner that the imaging optical path passes therethrough, the structure including a first transparent flat member perpendicular to the optic axis of the projection optical system and forming the entrance surface of the imaging light beam to the independent space and a second transparent flat member parallel to the first transparent flat member and forming the exit surface of the imaging light beam from the independent space, the gas filling the independent space having a refractive index different from the refractive index of the ambient space, and a device for regulating the distance between the first transparent flat member and the second transparent flat member and varying the thickness of the independent space in the direction of the optic axis.
    • 一种用于将第一平面上的图案投影到第二平面上的光学装置包括设置在第一平面和第二平面之间的投影光学系统,以形成成像光路,用于形成与环境空间无关的空间并填充有 第一平面和第二平面之间的气体,使得成像光路穿过其中,该结构包括垂直于投影光学系统的光轴的第一透明平面构件并且形成成像光束的入射表面 独立空间和平行于第一透明平板部件的第二透明平板部件,并且从独立空间形成成像光束的出射表面,填充独立空间的气体具有不同于环境的折射率的折射率 空间和用于调节第一透明平板构件与第二透明平板构件之间的距离的装置 透明的平坦构件,并且在光轴的方向上改变独立空间的厚度。