本文叙述了目前脉冲式零位光栅在定位精度方面,理论上存在的不足之处,提出了一种新型的零位光栅,即差分式零位光栅。

The description of existing pulsed mode zero-setting gratings in connection with their imperfection in the theory relevant to the locating accuracy is given. And at the same time, a new type of zero-setting gratings, namely, of the differential mode zero-setting gratings is suggested in this paper.