The Huygens principle, also known as the Huygens-Fresnel principle, offers a way to analyze the problems related to the propagation of waves during reflection, far-field limit, and near-field diffraction. This principle is named after Christiaan Huygens (a physicist of Dutch origin) and Augustin Jean Fresnel (a physicist of French origin). The statement of the Huygens Fresnel principle can be written as – “every point on a given wavefront is, by itself, a source of several spherical wavelets. Also, the secondary wavelengths that emanate from the different points interfere with each other mutually. The wavefront is formed by the sum of all of these wavelets (that are of spherical shape).