Home | Section One | Section Two | Section Three | Section Four | Section Five paraxial rays geometrical optics paraxial approximation thin lens equation conjugate points focal length image distance - distance image is from lens object distance - distance object is from lens lens maker's formula Airy disc Rayleigh criterion simple magnifier angular magnification compound microscope objective aberration of light spherical aberration aberration in optical systems chromatic aberration coma curvature of a field distortion circle of confusion marginal ray focus paraxial ray focus ray

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-Kevin Urban