In optimized design, damped leastsquares method and adaptive procedure are used to get higher relative aperture, lower distortion and appropriate MTF, and so on.
在光学系统优化设计的过程中，应用阻尼最小二乘法和适应法解决了大相对孔径、低畸变和MTF匹配等问题。
2
The fine structure parameters were calculated using a least-squares fitting procedure.