大 Example: Image Construction Image quality is determined by the point spread function of aperture configuration πDsin0 π(1+cose)D 2 V exp π Dsin e (v n +vin) Aperture dependence Geometry dependence The geometry dependence can be expanded into terms which only depend on relative position 丌 I()=1A()N+cosy, (=x2))+cos/w, ( DIl EMFF Final review ug.29,2003DII EMFF Final Review Aug. 29, 2003 Example: Image Construction Example: Image Construction • Image quality is determined by the point spread function of aperture configuration ( ) 2 1 1 ( ) 2 exp sin sin (1 cos ) , ⎥⎥⎥⎥⎦⎤ ⎢⎢⎢⎢⎣⎡ ∑ ⎟⎠⎞ ⎜⎝⎛ ψ + ψ λπ − ⎟⎟⎟⎟⎠⎞ ⎜⎜⎜⎜⎝⎛ λ π θ ⎟⎠⎞ ⎜⎝⎛ λ π θ ⎟⎠⎞ ⎜⎝⎛ λ π + θ ψ ψ = =Nn i j i n j n x y i DD J D I • The geometry dependence can be expanded into terms which only depend on relative position Aperture dependence Geometry dependence I ψi ( ) = IAp ψi ( ) N + cos 2πλψi(x1 − x2) ⎛ ⎝ ⎞ ⎠ + cos 2πλψi(x1 − x3) ⎛ ⎝ ⎞ ⎠ + ... ⎡⎣ ⎢ ⎤ ⎦ ⎥