You want to design an antireflection coating for a lens You want this coating to work well at two wavelengths, 1 450 nm and 2 650 nm, which you accomplish using two separate layers One layer uses MgF 2 (n 1 38) and is designed to remove the reflections at wavelength 1 The second coating is composed...

We can use the appropriate thinfilm interference cases to find the appropriate t ...

You want to design an antireflection coating for a lens. You want this coating to work well

Question:

You want to design an antireflection coating for a lens. You want this coating to work well at two wavelengths, λ₁ = 450 nm and λ₂ = 650 nm, which you accomplish using two separate layers. One layer uses MgF₂ (n = 1.38) and is designed to remove the reflections at wavelength λ₁. The second coating is composed of a material with n 1.55 and is designed to remove the reflections at l2. If the MgF₂ coating is deposited on a lens whose index of refraction is n 1.60 and the other coating sits on top of the MgF₂, what is the thickness of each layer?

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