Objective To investigate the effect of spatial and temporal frequency on the Sweep pattern visual evoked response acuity (SPVER-A).

目的研究时间频率和空间频率对扫描图像翻转诱发电位视力准确度的影响。

youdao

Owing to the PTD effect in the lenses of spatial filter, large temporal front distortion of femtosecond pulses occurs in the spatial filter.

由于透镜传输时间延迟效应（PTD），飞秒激光脉冲经过空间滤波器产生脉冲波前变形。

youdao

The properties of nonlinear crystal BBO is presented. The walk-off Angle and the spatial walk-off effect, the group velocity mismatch and the temporal walk-off effect are discussed.

对BBO晶体的材料特性，有效非线性系数，以及BBO晶体的走离角与空间走离效应，群速度失配与时间走离效应进行了讨论。

youdao