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DVD pickup lens inspection using angular shearing of spherical wavefront by grating

机译:使用光栅对球形波前的角剪切来检查DVD拾取镜头

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摘要

For high-speed and high-accuracy of aberration inspection process for pickup lens of optical head for digital versatile disc (DVD), an optical system based on shearing interference of spherical wavefront from pickup lens using grating has been applied. A simple algorithm, that processes points allocated on certain lines in fringe and fits relations between distance from basis point to the measurement points and phase difference at these points to equations of higher degree as curve fitting, has been devised.
机译:为了对数字多功能光盘(DVD)的光学头光学头的透镜进行高速,高精度的像差检查处理,已经应用了基于光栅的球面从透镜起的剪切干涉的光学系统。设计了一种简单的算法,该算法可处理在条纹上某些线上分配的点,并将基点到测量点的距离之间的关系以及这些点处的相差与曲线拟合的更高阶方程拟合。

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