哈工大信息光学Chapter5-3.pdf

幻 灯 片 1 Questions and Answers for Chapter 4 and 5 Weimin Sun College of Science Harbin Engineering University 幻 灯 片 Chapter 4 2 z exp(jkr01 ) U(x , y ) j l U(x ,h) r2 dxdh 01 Under the Fresnel approximation: ejkz k 2 2 U (x , y ) j lz U(x ,h) exp{j 2z [(x x ) (y h) ]}dxdh - U(x ,h)h(x x , y h )dxdh - jkz k 2 2 k 2 2 x y e j ( x y ) j (x h ) -j 2 p ( x h ) U (x ,y ) j lz e 2 z [U(x ,h)e 2z ]e lz lz dxdh - 幻 灯 片 3 Under the Fraunhofer approximation: 2 2 k (x h )max z 2 jkz k 2 2 x y e j ( x y ) -j 2p ( x h ) U(x , y ) e 2 z U(x ,h)e lz lz dxdh j lz - f X x / lz f Y y / lz 幻 灯 片 Chapter 5 k 4 t (x ,y ) exp[j (x2 y 2 )] l 2f k 2 2 exp[j 2 f (u v )] j 2p ( xu yv) U (u, v) U (x , y )P(x , y )e lf dxdy