哈工大信息光学Chapter6-3.pdfVIP

幻 灯 片 Chapter 6 1 Frequency Analysis of Optical Image Systems Weimin Sun College of Science Harbin Engineering University 幻 Deform ：使变形 灯 Aberrations and their effects on 片 frequency response 2 n When wavefront errors exist, we can imagine that the exit pupil is illuminated by a perfect spherical wave, but a phase-shifting plate exists in the aperture, thus deforming the wavefront that leaves the pupil. n If the phase error at the point (x,y) is represented by kW(x,y), where k=2p/l and W is an effective path-length error, then the complex amplitude transmittance P(x,y) of the imaginary phase-shifting plate is given by P (x ,y ) P (x, y )ejkW (x ,y) 幻 Overlap：交叠 灯 P (x , y) P (x ,y )ejkW (x ,y ) A 2p 片 h(u,v) lz P (x ,y ) exp[j lz (ux vy)]dxdy i i 3 jkW (lz f ,lz f ) H (f , f ) P (lz f ,lz f ) P(lz f ,lz f )e i X i Y X Y i X i Y i X i Y dxdy Where A(f X,f Y) is the area of H (f X ,f Y ) A (f X ,f Y ) overlap two shifted apeture dxdy A (0 ,0) lz f lz f lz f lz f