Syllabus

Aberrations: Transverse ray and wave aberrations, chromatic aberration, Ray tracing: paraxial, finite and oblique rays, Image evaluation: transfer functions, point spread function, encircled energy and its computation and measurement, optimization techniques in lens design, merit function, damped least square methods, orthonormalization, and global search method, Tolerance analysis; Achromatic doublets, achromats and aplanats; Cooke triplet and its derivatives; Double Gauss lens, Zoom lenses and aspherics, GRIN optics, focal shift, high and low N number focusing systems, focusing of light in stratified media, high numerical aperture focusing, basics of non-paraxial propagation of light.

Classification of lens systems. Refractive systems – Cookes triplet, Gatelecentric system, telephoto system, f-theta lens (fish eye lens); Relective systems – single mirror telescope, two mirror telescope –Greogrian, Dall-Kirkham, Marsenne, Cassegrain, R-C telescope, three mirror aspheric system : unobscured system, obscured system