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immersion lens 【物理學】浸沒透鏡。

immesh

For this reason , the ultrahigh density optical disk data storage technologies based on the solid immersion lens technology and the sb film super resolution technology , which appear more promising to industrialize in the short term , have been studied in this paper . the aim of this paper is to develop the key technologies for next generation optical disc data storage system 本文圍繞超高密度光盤數據存儲技術中的固體浸沒透鏡存儲技術以及基于sb多層膜的介質超分辨高密度光存儲技術展開研究,其目的在于通過對這兩種最接近實用化的近場高密度光存儲技術的研究,掌握和發展下一代超高密度光存儲設備的關鍵技術。

The optical near - field distribution and propagation properties of solid immersion lens system are analyzed in detail when illuminated by linearly polarized focusing gauss beam . the change of the optical intensity and beam dimension at the bottom of solid immersion lens with different refractive index and different distance are discussed . the simulated results reveal that the higher the refractive index is , the stronger the optical intensity and the smaller the beam dimension at the bottom of the solid immersion lens will be 編制了對固體浸沒透鏡近場超高密度光存儲系統進行模擬的二維時域有限差分程序,實現了對固體浸沒透鏡光存儲系統的數值模擬;著重研究了線偏振的高斯光束通過固體浸沒透鏡的光傳輸和近場光場分布特性;分析了固體浸沒透鏡底面出射光強、光斑直徑隨固體浸沒透鏡折射率的變化、光透過固體浸沒透鏡后的強度、光斑直徑隨離開固體浸沒透鏡底面距離的變化。

In the retrofocus project , a retrofocus structure with two elements is used in the object lens to enlarge fov and back working distance , in the head of which the negative meniscus have the effect of balancing aberration and deviating rays like a prism . and a standard hyperhemisphere immersion lens with high refractive index is put behind the object lens to satisfy the receiving of a detector with smaller photosensitive 反遠距設計方案中物鏡采用二片式反遠距結構,增大了視場和后工作距離,彎月型負透鏡在前,具有平衡像差和棱鏡的偏向作用;物鏡后放置高折射率標準超半球型浸沒透鏡,滿足小光敏面探測器接收。

In this article , the fundamental principle and current research of optical data storage including cd and dvd , three - dimensional optical data storage and near - field high - density optical data storage are summarized . a two - dimensional finite difference time domain program for analysis of solid immersion lens system is compiled 本論文概述了已產業化的以cd和dvd為代表的光盤存儲技術和在開發中的高密度光存儲技術(主要包括三維光數據存儲技術及近場光學超高密度光存儲技術)的原理及研究現狀。

The feasibility and some advantages of employment of sil have been discussed . the numerical aperture are calculated when laser pulse is defocusing . in contrast with traditional microscopy objective , the employment of solid immersion lens can effectively increase the numerical aperture of the recording system ; thereby it can increase the volumetric density and decrease the demand of the incident laser power 當脈沖聚焦點相對于固體浸沒透鏡底面離焦時,對系統的有效數值孔徑進行了計算,結果表明采用固體浸沒透鏡離焦的方式進行記錄,系統的有效數值孔徑最低可增大到固體浸沒透鏡插入前的折射率倍,其數值孔徑的理論極限值為存儲介質的折射率。

When only allows the total internal reflection beams focus on the small aperture , which is formed at the center of metal film coated on the bottom of solid immersion lens , the optical fields propagated from the aperture of different dimension is first simulated 根據衍射超分辨原理首次模擬出了底面鍍有金屬膜、中心留有通光微孔的固體浸沒透鏡的出射光場分布。

And it is also found that the polarized incident gauss beam become depolarized after emitting from the bottom of solid immersion lens . the beam dimension of the emitting optical field at the near - field bottom of solid immersion lens is “ broadened “ 在固體浸沒透鏡底面的近場區域,出射光場發生了退極化,使得出射總場的光斑有了一定程度的“增寬”現象。

In conclusion , solid immersion lens , which is feasible to focus femtosecond laser pulse in three - dimensional optical data storage , shows the rather potential to increase the volumetric density 總之,用固體浸沒透鏡在透明介質中進行飛秒激光三維存儲是可行的、且其在提高體存儲密度方面有較大的發展潛力。

The optical field attenuates as exponential function and the transmitted beam expands quickly with the increase of the distance away from solid immersion lens 固體浸沒透鏡的折射率越大,底面出射的光斑越小,但隨著離開固體浸沒透鏡底面距離的增加,光斑增大得越快。

Meanwhile , solid immersion lens is also applied to focus femtosecond laser pulse in three - dimensional optical data storage 分析和闡述了固體浸沒透鏡應用于飛秒脈沖激光三維光存儲系統中的可行性及優點。