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The antireflection coatings consist of layers whose optical thicknesses are quater waves or multiples thereof. Linear programming is used to minimize the reflectance and at the same time restrain the refractive indices to values that are attainable. Examples are given of coatings for visual optics and for higher refractive index substrates such as lithium niobate.
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Baumeister et al. (1977) studied this question.
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