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    • 10. 发明申请
    • Illuminating optical system, exposure system and exposure method
    • 照明光学系统,曝光系统和曝光方法
    • US20060171138A1
    • 2006-08-03
    • US10565412
    • 2004-06-29
    • Kenichi MuramatsuNorio KomineOsamu TanitsuHirohisa Tanaka
    • Kenichi MuramatsuNorio KomineOsamu TanitsuHirohisa Tanaka
    • G01D11/28
    • G03F7/70566
    • An illuminating optical system capable of preventing a change in the polarized status of a linearly polarized light passing through a light transmitting member formed of a cubic-system crystal material such as fluorite. An illuminating optical system comprising a light source unit (1) for suppling a linearly polarized light to illuminate surfaces (M, W) to be illuminated with a light from the light source unit. The system is provided with a polarized status switching means (10, 20) disposed on a light path between the light source unit and the surfaces to be illuminated, for switching the polarized status of a light, that illuminates the surfaces to be illuminated, between a linearly polarized status and a non-linearly polarized status. The polarized status switching means has a phase member (10) for changing the polarization surface of an incident linearly polarized light as needed, and a depolarizer (20) for depolarizing an incident linearly polarized light as needed. A phase advancing axis direction in association with the double refraction variation of a light transmitting member formed of fluorite is so set as to almost agree with or cross almost perpendicularly to the field vibration direction of a linearly polarized light incident to a light transmitting member.
    • 一种照明光学系统,其能够防止通过由诸如萤石的立方晶系晶体材料形成的透光构件的线偏振光的偏振状态的变化。 一种照明光学系统,包括用于提供线性偏振光以照射要被来自光源单元的光照射的表面(M,W)的光源单元(1)。 该系统设置有偏光状态切换装置(10,20),该偏振状态切换装置设置在光源单元和被照射表面之间的光路上,用于将照亮被照射的表面的光的偏振状态 线性极化状态和非线性极化状态。 极化状态切换装置具有用于根据需要改变入射的线偏振光的偏振面的相位构件(10)和根据需要对入射的线偏振光进行去偏振的消偏振器(20)。 与萤石形成的透光构件的双折射变化相关的相位推进轴方向设定为几乎与入射到透光构件的线偏振光的场振动方向一致或几乎垂直。