%0 Journal Article %T Double-grating lateral shearing interferometer for EUV optics at-wavelength measurement %A Liu, Zhiqiang %A Niibe, Masahito %A Murakami, Katsuhiko %J Proceedings of SPIE %V 5752 %N 1 %P 663-672 %@ 0277-786X %D 2005-05-10 %I SPIE %~ DeepDyve