【摘要】 提出了一种利用优化了的三带相位型超分辨光阑来延长高密度数字化视频光盘 (HD DVD)的焦深的方法 ,同时使得聚焦光斑进一步减小。利用该器件可以将高密度数字化视频光盘的焦深延长到目前数字化视频光盘(DVD)的焦深长度 ,并且轴向强度分布也得到了优化更多还原

【Abstract】 It is proposed that using a optimized three protion phase shifting apodizer to increase the depth of focus of the next generation digital versatile disk (DVD) and at the same time minimize the spot size. It makes the depth of focus of next generation DVD comparable to current DVD. The simulation result shows that an optical system with this apodizer also has a good defocus characteristic.更多还原