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    • 2. 发明专利
    • Catoptric objective mirror, broadband objective optical system with mirror, optical imaging system with catadioptric lens and broadband optical imaging system having two imaging paths or more
    • 目标目镜,宽带目标光学系统,具有镜面,光学成像系统,具有阴影镜头和宽带光学成像系统,具有两个成像条或更多
    • JP2013242595A
    • 2013-12-05
    • JP2013156941
    • 2013-07-29
    • Kla-Tencor Corpケーエルエー−テンカー・コーポレーションKla−Tencor Corporation
    • HWANG SHIOW-HWEIGREGORY L KIRKHWAN J JEONGDAVID SHAFERRUSSELL HUDYMA
    • G02B17/08G01N21/956G02B13/18
    • G02B17/0808G02B17/0652G02B17/084G02B21/04
    • PROBLEM TO BE SOLVED: To provide a broadband objective optical system and a broadband optical imaging system with two imaging paths or more that allow a use of a much shorter wavelength to improve resolving power as to an imaging optical device for sample inspection and avoid a risk of contaminant diffusion on a wafer.SOLUTION: An optical system includes an objective optical system with at least four mirrors and a focus adjustment optical system, and the mirrors include an outermost mirror with an aspect ratio equal to or less than 20:1. The focus adjustment optical system includes a refractive optical element. The objective optical system is configured to provide imaging at a numerical aperture equal to or greater than 0.7 and with central obscuration as low as 35%. The objective optical system may include two mirrors or more and one of the two or more mirrors contains a refractive module that seals off a central opening of the outermost mirror. The broadband imaging system may include one objective optical system and two or more imaging paths and the imaging paths are configured to provide imaging at the numeral aperture equal to or more than 0.7 and a field of view equal to or more than 0.8 mm.
    • 要解决的问题:提供宽带物镜光学系统和宽带光学成像系统,其具有两个成像路径或更多,允许使用更短的波长来提高用于样本检查的成像光学装置的分辨率,并避免风险 污染物扩散在晶片上。解决方案:光学系统包括具有至少四个反射镜和焦点调节光学系统的物镜光学系统,并且反射镜包括具有等于或小于20:1的纵横比的最外镜。 聚焦调整光学系统包括折射光学元件。 物镜光学系统被配置为提供等于或大于0.7的数值孔径并且具有低至35%的中心遮蔽的成像。 物镜光学系统可以包括两个反射镜或多于一个,并且两个或更多个反射镜中的一个包含折射模块,该折射模块密封最外侧镜的中心开口。 宽带成像系统可以包括一个物镜光学系统和两个或更多个成像路径,并且成像路径被配置为提供等于或大于0.7的数值孔径和等于或大于0.8mm的视场的成像。