再者，提出了一种新的使用光栅刻线进行成像系统精度标定的方法。
The third step, a new method of high-precision calibration with grating grooves is presented for the optical imaging system.
结果表明，当光栅对刻线失配时，且只考虑二阶色散的影响时，初始啁啾导致脉冲宽度小于无初始啁啾脉冲的宽度。
The simulations show that when the grating grooves are unparallel, the original chirp leads to the pulse width smaller only considering GDD.
结果表明，存在刻线失调时，低刻线密度的光栅具有更好的优越性。
The results show that gratings with low groove density are superior to that of high density ones, if the groove misalignment is unavoidable.
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