...physics），主镜达到3.5米，近似于赫歇尔太空千里镜，到时辰将送到第二拉格朗日点欧洲建议制作 菲涅耳成像器 （ Fresnel Imager ）美利坚合众国能源部和NBSB建议制作一架暗能量太空千里镜（Dark Energy Space Telescope），固然首要使命是寻觅太空中的暗能量 ...
abstract:A Fresnel imager is a proposed ultra-lightweight design for a space telescope that uses a Fresnel array as primary optics instead of a typical lens. It focuses light with a thin opaque foil sheet punched with specially shaped holes, thus focusing light on a certain point by using the phenomenon of diffraction.