论文部分内容阅读
为提高固体浸没透镜(SIL)和盘面之间的近场耦合效率,设计并研制了一种基于流体力学微流动理论的近场光存储深亚微米微型飞行头。建立了承载微飞行头的力学模型,并借助有限体积法对飞行头的动态特性进行了数值仿真。该微型飞行头将聚焦透镜和SIL集成于一个承载微飞行头,克服了光盘高速旋转过程中,二者距离改变而导致离焦的影响;微型飞行头采用了正负压力并存的结构,极大提高了飞行头的承载刚度,并有效消除了工作过程中气流的不断变化对飞行高度的影响,增加了飞行头的动态稳定性;将SIL作为承载微飞行头轨道的设计获得了良好的近场耦合效率。试验表明,微型飞行头在转速18m/s时,承载达到88mN,飞行高度小于65nm,满足近场光存储系统的需要。
In order to improve the near field coupling efficiency between solid immersion lens (SIL) and disk, a deep submicron micro-jet based on the theory of hydrodynamic microfluidics is designed and developed. The mechanical model bearing the micro-flight head is established, and the dynamic characteristics of the flight head are numerically simulated by the finite volume method. The miniature flying head integrates the focusing lens and the SIL into a bearing micro-flight head to overcome the influence of the change of the distance between the two during the high-speed rotation of the compact disk. The miniature flying head adopts a structure in which positive and negative pressures coexist, Which increases the bearing stiffness of the flying head and effectively eliminates the influence of the changing airflow during the working process on the flying height and increases the dynamic stability of the flying head. The design of the SIL as a bearing micro-flying head orbit obtains a good near-field Coupling efficiency. Experiments show that the micro-flight head can achieve a payload of 88mN and a flying height of less than 65nm at a speed of 18m / s, which meets the needs of a near-field optical storage system.