Zhang Yaoju
College of Physics and Electronic Information, Wenzhou University, Wenzhou, China.
Appl Opt. 2006 Dec 1;45(34):8653-8. doi: 10.1364/ao.45.008653.
A new solid immersion mirror called the planoellipsoidal (PE) solid immersion mirror (SIM) for the near-field optical storage is proposed and developed. The PE SIM has a small aperture on the apex of the ellipsoidal surface. The intensity distribution of the transmitted field is calculated by using the vector diffraction theory. Compared with a conventional solid immersion lens (SIL), the proposed PE SIM has the following features. A PE SIM replaces three optical elements of the collimator, objective, and SIL in a conventional SIL optical storage system, so that the optical system equipped with the PE SIM is not only simple in its assembly but is also effective in making an optical head unit. The PE SIM obtains light from a point light source and focuses it directly on the recording layer, which may be useful for a compact optical data storage system. The convex ellipsoidal surface of the PE SIM can reduce the risk of the SIM touching the surface of the recording medium. In addition, the spreading of the spot size with the increase of distance is very small in the PE SIM.
提出并研制了一种用于近场光存储的新型固体浸没镜——平椭球形（PE）固体浸没镜（SIM）。PE SIM在椭球表面的顶点处有一个小孔径。利用矢量衍射理论计算了透射场的强度分布。与传统的固体浸没透镜（SIL）相比，所提出的PE SIM具有以下特点。PE SIM取代了传统SIL光存储系统中的准直器、物镜和SIL这三个光学元件，因此配备PE SIM的光学系统不仅组装简单，而且在制造光学头单元方面也很有效。PE SIM从点光源获取光并将其直接聚焦在记录层上，这对于紧凑的光学数据存储系统可能是有用的。PE SIM的凸椭球表面可以降低SIM接触记录介质表面的风险。此外，在PE SIM中，光斑尺寸随距离增加的扩展非常小。
