行車記錄器超廣角鏡頭設計

陳筠涵(Yun-Han Chen)

指導教授 ： 孫文信

國立中央大學/理學院/光電科學與工程學系/碩士(2014年)

摘要

本文提出汽車超廣角鏡頭設計，半視角為80度入射，會降低在成像面上的相對照度，必須在優化過程對相對照度控制。其次，會引進很大的桶型畸變，容易造成在成像面影像擠壓，而採用F-theta畸變取代光學畸變。最後，本篇設計不採用自動對焦，且維持物距從無窮遠至600 mm之成像品質。使用七片透鏡與兩片平板玻璃，選用兩百一十萬畫素之1/6感光元件，設計半視角八十度，F/#為2.4，焦距為1.1 mm，鏡頭長度為22.37 mm，F-theta distortion 小於2%、相對照度大於83%。

關鍵字

超廣角鏡頭 ； 行車記錄器

並列摘要

Vehicle lens is also called event data recorder which is a kind of wide angle lens. However, it is smaller than traditional camera lens.
The purpose of this study is to design an ultra-wide angle lens installed around cars and control the relative illumination on the image by adjusting the numerical aperture. We evaluate the distortion based upon F-θ distortion.
We discussed the aberrations of the system. Finally, we meet the goal which includes total track, lateral color, numbers of elements and relative illumination.

參考文獻

[1] R. W. Wood, "Refraction of Light," in Handbook of PhysicalOptics (Optical Society of America, Washington, DC, 1911).

[2] R. Hill, "A Lens for Whole Sky Photography," in Proceedings of the

Optical Convention ,(London, 1926) , pp.878-883.

[3] C. Beck, “Apparatus to photograph the whole sky,” J.Sci. Instrum. , 2, pp. 135-139 (1925).

[4] J. Y. Zheng and S. G. Li, "Employing a fish-eye for scene tunnel