By study the measurement of parallelism between Optical head and Spindle motor at present, we find that there are expensive and inconvenient. So it needs to design a new convenient method.
A new laser interferometer method is presented and used to quick measurement of parallelism of optical flat.
文章提出了一种新的检测方法即用数字波面干涉仪检测平晶的平行度。
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Using the transparence CD, PSD can detect the displacement of laser spot between non-placing and placing the CD, and it can be used to calculate the parallelism between optical head and spindle motor.