针孔对分辨率的影响 a) PH~3.0 AU b) PH~1 AU PH~0,25 AU FWHMiL latera! 像扩散斑 FWHMdet lateral 光源扩散斑 PSFdet>>PSF PSFdet>PSF PSFdet>=PSF Geometric-optical Wave-optical confocality confocality PSF point spread function AU Airy unit 8针孔对分辨率的影响 8 PSF = point spread function AU = Airy unit 光源扩散斑 像扩散斑