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duanxy:用无焦模式,或者后面加理想透镜 (2014-12-04 13:01) Gk5'|s
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duanxy:理想透镜当然是对平行光成像,平行光波前无像差则理想透镜理想成像。 (2015-01-14 12:17) ~+ae68{p