AIM: To observe the clinic significance of A-ultrasonic eye axis measurement of silicon oil eye.
目的：探讨硅油充填眼a超眼轴测定的临床意义。
The results show that the measurement volume with off-axis of the LDA-probe has different performance from that with on-axis probe.
结果表明，LDA探头非垂直布置时，测量控制体具有与垂直布置时不同的性质。
A method for roll angular error measurement of NC machine tool vertical axis was studied based on straightness measurement using laser interferometers system.
以激光干涉仪直线度误差测量为基础研究了数控机床垂直轴滚转角误差的检测方法。
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