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    首頁> 外文會議>Unmanned/Unattended Sensors and Sensor Networks II >Experimental Retroreflectors with Very Wide Field of View
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    Experimental Retroreflectors with Very Wide Field of View

    機譯:具有寬視場的實驗性后向反射鏡

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    摘要

    This paper reports the development of novel retroreflectors for use in free-space optical communication systems. It will be important for the retroreflectors to have a very wide field of view to make such systems practicable and affordable. Corner cube retroreflectors present a practical means of meeting the requirement for a wide field of view, but require use of materials with very high refractive index. Practical measurements on initial samples of high index corner cubes have shown encouraging optical performance. The measured results approximately confirm predictions of the variation of reflection efficiency with the angle of incidence. Retroreflectors based on graded-index, spherical (GRIN-sphere) lenses potentially offer an alternative with valuable technical advantages over the use of high-index corner cubes, if such lenses can be fabricated with a suitable combination of optical quality, size and relative aperture. The key property of GRIN-sphere lenses is that they can in principle suppress the most problematic feature of sphere lenses, that is, their strong spherical aberration. Predictions for practical graded-index sphere lens structures show valuable potential for improvement compared to uniform sphere lenses, including diffraction limited optical performance over significant fractions of the lens aperture.
    機譯:本文報道了用于自由空間光通信系統的新型后向反射器的發展。對于后向反射器來說,擁有廣泛的視野以使這種系統切實可行且價格可承受是很重要的。角錐后向反射器提供了一種實用的方法,可以滿足寬視場的要求,但是需要使用折射率非常高的材料。對高折射率角錐的初始樣品進行的實際測量顯示出令人鼓舞的光學性能。測量結果大致證實了反射效率隨入射角變化的預測?;谔荻日凵渎是蛎妫℅RIN-sphere)透鏡的后向反射鏡可能會提供替代技術,比起使用高折射率角錐,具有寶貴的技術優勢,前提是此類透鏡可以光學質量,尺寸和相對孔徑的適當組合進行制造。 GRIN球面透鏡的關鍵特性是,它們原則上可以抑制球面透鏡最有問題的特征,即它們的強球差。與均勻球面透鏡相比,實用漸變折射率球面透鏡結構的預測顯示出有價值的改進潛力,其中包括在很大一部分透鏡孔徑上受衍射限制的光學性能。

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