Figure 6
(a) Variation of the surface height in the sagittal direction at Y = 0 of the exact profile (the black line) and the conical approximation with the radius RM0, given by equation (37) (the blue line) of the diaboloidal mirror defined by the conjugate parameters in equation (33). For clarity, the approximation trace is vertically shifted by 0.1 mm. (b) The height error of the conical approximation depicted as a difference between the exact and approximation height traces in plot (a). The difference is less than 1 µm across the range. |