• We investigate the dependence of the focusing contribution on the order m of local ring of underlying traditional Fresnel zone plate.

    在本文中,我们讨论聚焦贡献潜在传统菲涅耳波片上次的依赖性

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  • With the structure, the focusing ring can be quickly clamped on the optical mode lens; and assembly and disassembly are convenient and positioning is accurate.

    由于本实用新型采用了上述结构焦环快速地卡装镜头上,方便定位准确

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  • The second version also has wider and deeper knurling on the focusing ring than the previous version.

    第二焦环前一更深

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  • The second version also has wider and deeper knurling on the focusing ring than the previous version.

    第二焦环前一更深

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