光學散射元件的設計與應用之研究

The Study of Optical Diffusers and Applications

馬仕信(Shih-Hsin Ma)

指導教授 ： 孫慶成

國立中央大學/理學院/光電科學研究所/博士(2007年)

摘要

本論文以光散射片之應用為重點，首先利用陣列透鏡具有整形光形之作用，以設計大散角及高穿透效率之散射片，以做為照明之應用。其次，我們提出了一個體積全像式之旋轉角度量測系統，產生亂相的毛玻璃與旋轉中心間由一支連桿連接，我們可藉由改變連桿半徑來調整不同的角度容忍度，其調整範圍可由幾度至百分之一度之間，實驗與理論比較亦相當之吻合。最後，我們利用毛玻璃做為體積全像亂相多工儲存之亂相產生器與角度感測元件，其在毛玻璃角度改變時的亂相特性在體積全像中多工儲存多張不同的影像來達到全光學之感測，在實驗中，我們儲存三張不同的影像，並成功地藉由此全光學之體積全像感測系統讀出旋轉角度。

關鍵字

光學散射元件 ； 散射光

並列摘要

In this thesis, we study on the design and application of diffusers. First at all, we design a lens-array type diffuser for lighting application to perform high transmission efficiency and large diffusion angle. Then we propose a rotation measurement system with use of volume holography. In such a system, the ground glass, which is a random phase generator, is attached on a rod which is connected to a rotational stage. By adjusting the length of the rod, we can obtain various rotational selectivity of the volume holographic filter. In the simulation as well as the experiment, the rotational selectivity is from several degrees to one hundredth degrees. Finally, we apply a ground glass to be a random phase generator and rotational sensor. We store multiple images in volume holographic recording medium with random phase encoding to perform an all optical sensing. In the experiment, we store three images and successfully read out the rotation angle through the proposed system.

並列關鍵字

scattering ； optical diffuser

參考文獻

[1] John C. Stover, Optical Scattering Measurement And Analysis (New York, McGraw-Hill, Inc., 1990).

[2] C. N. Kurtz, “Transmittance characteristics of surface diffusers and the design of nearly band-limited binary diffusers”, J. Opt. Soc. Am. 62, 982-989 (1972).

[3] P. F. Gray, “A method of forming optical diffusers of simple known statistical properties”, Opt. Acta 25, 765-775 (1978).

[4] William N. Partlo and William G. Oldham, “Diffuser speckle model:application to multiple moving diffusers,” Appl. Opt. 32, 3009-3014 (1993).

[5] M. Bjuggren, L. Krummenacher, and L. Mattsson, “Infrared diffuser for application in transmission and reflection at 10.6um,” Appl. Opt. 36, 940-948 (1997).