Perfect optical system dose not be inhibited by physical conditions and every object point has ideal point image.
理想的光学系统是不受物理条件约束的，每个物点都成理想点像。
However, for the actual optical system, its point image become a speckle because of diffraction of light and aberration.
对于实际光学系统，由于光的衍射和像差，使所成的点像为一弥散斑。
However, for the actual optical system, its point image become a speckle because of diffraction of light and aberration.
对于实际光学系统，由于光的衍射和像差，使所成的点像为一弥散斑。
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