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OPTICAL DESIGN FOR PAGE ACCESS TO VOLUME OPTICAL MEDIA

机译:批量访问光学媒体的光学设计

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4F lens designs are optimized for parallel access to volume holographic memories. Aberrations, diffraction, and component tolerancing are considered for their impact on parallelism, crystal information density, and overall system storage density. We find that a parallelism of greater than or equal to 10(5) bits per page and a crystal information density of approximate to 2 Mbits/mm(3) are achievable with standard optical elements and that advanced designs offer significant improvements. Crystal surface tolerance measurements show that a diffraction-limited performance is achievable over apertures of 7.1 mm for LiNbO3 and 1.5 mm for KNSBN(60). Lens-tolerancing simulations show that lens decenter degrades peak parallelism and peak crystal information density. Anew nonconfocal 4F system design with improved performance is presented. (C) 1996 Optical Society of America [References: 19]
机译:4F镜头设计经过优化,可以并行访问体积全息存储器。考虑到像差,衍射和元件公差对平行度,晶体信息密度和整个系统存储密度的影响。我们发现,使用标准光学元件可以实现大于或等于每页10(5)位的并行度和大约2 Mbits / mm(3)的晶体信息密度,并且先进的设计提供了显着的改进。晶体表面公差测量表明,对于LiNbO3,孔径为7.1 mm,对于KNSBN,孔径为1.5 mm,可获得衍射极限性能(60)。镜头公差模拟表明,镜头偏心会降低峰值平行度和峰值晶体信息密度。提出了一种新的具有改进性能的非共聚焦4F系统设计。 (C)1996年美国眼镜学会[参考文献:19]

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