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diffraction gratings and does - Breault Research Organization, Inc.

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DIFFRACTION GRATINGS AND DOESFundamentals of Diffractive Optical Elements. . . . .R()Plano-Convex Lens with a Spherical SurfacedQuadratic (Parabolic) Phase Function from LensModuloPhase of the Quadratic Phase FunctionFigure 5 Phase-transforming lens, resulting quadratic phase function, <strong>and</strong> diffractivemodulo 2 phase functionBy invoking the paraxial approximation with the binomial theorem, we can replacethe spherical surface with a quadratic approximation. This leads to,Equation 11ASAP Technical Guide 21

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