Chapter 4 Fourier transform Figure 4.2 200 (b)T=87 (l)T=16T 7个→an=2/T↓□谱线变密3 Chapter 4 Fourier Transform T 0 = 2 /T  谱线变密 ( ) 4 1 a T = T ( ) 8 1 b T = T ( ) 1 c T = 16T Figure 4.2