The third step, a new method of high-precision calibration with grating grooves is presented for the optical imaging system.
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。
Experiments show that this system has high adaptability to disturbance of arc length and guarantees the stability of welding process even in deep grooves.
实验表明，该系统对弧长扰动有较强的适应能力，可在深坡口中稳定焊接。
Firstly, the system of parallel grating pair, in which the grating grooves is unparallel while the grating surfaces is parallel, has been studied with the tri-dimensional ray-tracing method.
首先，在三维空间内利用光线追迹法，对刻线不平行而光栅面平行时的压缩光栅对进行研究。
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