Sequential_Optical_System_Simulation

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B = N-curvature(i).*(L.*x0+M.y0); C = curvature(i).(x0.^2+y0.^2); delta = C./(B+sqrt(B.^2-curvature(i).*C)); Hello! Sorry to trouble you. I wonder the meaning of the ''B,C,delta'' and how can I learn about the fomulas. Are there any books introducing them? Looking forward to your reply.