A novel technique of optimizing chirped mirrors is proposed. Simulation demonstrates that the residual group delay dispersion ripples of two matched chirped mirrors is less than 10 fs2 over the wavelength range of 700～1050 nm and that of three matched chirped mirrors is less than 15 fs2 over the same range. These kinds of chirped mirrors have precisely controlled group delay dispersion, which plays a critical role in the generation of ultrashort pulses and compression of few-cycle to monocycle femtosecond pulses.