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    • 3. 发明授权
    • Catadioptric projection objective with intermediate images
    • 反射折射投影物镜与中间图像
    • US09019596B2
    • 2015-04-28
    • US13361707
    • 2012-01-30
    • Aurelian DodocWilhelm UlrichAlexander Epple
    • Aurelian DodocWilhelm UlrichAlexander Epple
    • G02B17/08G03F7/20G02B17/06
    • G03F7/70058G02B17/06G02B17/08G02B17/0804G02B17/0892G03F7/7015G03F7/70225G03F7/70275
    • A catadioptric projection objective has a first objective part, defining a first part of the optical axis and imaging an object field to form a first real intermediate image. It also has a second, catadioptric objective part forming a second real intermediate image using the radiation from the first objective part. The second objective part has a concave mirror and defines a second part of the optical axis. A third objective part images the second real intermediate image into the image plane and defines a third part of the optical axis. Folding mirrors deflect the radiation from the object plane towards the concave mirror; and deflect the radiation from the concave mirror towards the image plane. The first part of the optical axis defined by the first objective part is laterally offset from and aligned parallel with the third part of the optical axis.
    • 反射折射投射物镜具有第一物镜部分,限定光轴的第一部分并对物场进行成像以形成第一实际中间像。 它还具有使用来自第一目标部分的辐射形成第二实际中间图像的第二反射折射物镜部分。 第二目标部分具有凹面镜并且限定光轴的第二部分。 第三目标部分将第二实际中间图像成像到图像平面中并且限定光轴的第三部分。 折叠镜将物体平面上的辐射偏转到凹面镜; 并将来自凹面镜的辐射偏转到图像平面。 由第一目标部分限定的光轴的第一部分与光轴的第三部分横向偏移并与其平行。