© 谱线宽化 B.=BparticteBstrain= Kλ Dcos0 +n tan O 干涉函数 e=-cot0△0 1G(gnkD2≈ sin2(πN1e1) (πe1)2 (N2N)2 o=E'8=EBcot0/4 Bnkt0.891/(Dnkicos0) 7 B.co0nsn KAD sina School of Materials Science and Engineering材料科学与工程学院 School of Materials Science and Engineering 谱线宽化 17 𝐺(𝑔ℎ𝑘𝑙) 2 ≈ 𝑠𝑖𝑛2 𝜋𝑁1𝜀1 (𝜋𝜀1) 2 (𝑁2𝑁3) 2 干涉函数 βℎ𝑘𝑙 ≈ 0.89𝜆/(𝐷ℎ𝑘𝑙𝑐𝑜𝑠θ) ε = −𝑐𝑜𝑡θΔθ σ = 𝐸·ε = 𝐸β𝑐𝑜𝑡θ/4