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Resolution limit in Far field opticsFar field imaging system:zxk ⊥k ∥We sample <strong>the</strong> object usingplane waves:2π/k ∥λk ||2π/λ = k ∥ 2 + k ⊥2Lensk ∥,max = 2π sin θ/λθkNyquistSampled dd min = λ2sin θTwo objectsto resolveFar field optics limits IR resolution to λ , or several μm6/27/13 <strong>Bruker</strong> Nano Surfaces6