偏心儀器應用於鏡頭組裝成像品質改善之研究

本研究主要探討手機相機鏡頭的光學系統中，非球面塑膠透鏡因成形與組裝誤差所導致鏡頭成像品質不佳問題，可藉由偏心量測儀器取得透鏡成形與組裝後的誤差量，並以量測數據找出決定透鏡組裝相位的原則，以獲得較佳的成像品質。在一般軸對稱的光學系統中，會因為透鏡組裝的相位影響成像品質，故快速與數據化取得最佳組裝相位，為實際生產重要的ㄧ環；本研究使用由三片非球面塑膠透鏡所構成的鏡頭組，研究結果顯示較佳的透鏡組裝相位可以改善鏡頭的成像品質，對於鏡頭MTF特性值可提升20~28%，結果除了可提供技術人員量化的數據作為判斷依據外，也可縮短問題處理時間，使鏡頭能夠更快速量產，並達到所需的成像品質。

關鍵字

偏心；鏡頭組裝；調變轉換函數

並列摘要

This study mainly deals with the problem of poor image quality of aspherical plastic lens resulted from molding error and assembly error in the optical system of mobile phone camera lens. Better image quality can be achieved by obtaining the amount of the molding error and assembly error through a de-centering measurement instrument and then locating a lens assembly phase with the measurement data. In the general axial symmetrical optical system, a lens assembly phase affects image quality. Therefore, obtaining the optimal assembly phase rapidly and transforming it into data are crucial to actual production of the lens. In the study, a lens set constituted of three aspherical plastic lenses is used. The results of the study show that a better lens assembly phase can improve image quality of the lens, and an MTF value of the lens is also thereby raised by 20~28%. These results not only provide technicians with quantified data as basis for their judgment, but also help shorten the time for problem shooting. Accordingly, lenses can go into mass production more quickly, and desired image quality is achieved.

並列關鍵字

Decenter ； Lens Assembly ； Modulation transfer function

參考文獻

[1] 任貽均，”我國非球面鏡片市場”，光連第一卷第4期，1996，pp.21-22.

Google Scholar

[2] Uchio Shunji,”Recent trends of plastic aspherical lens in japan,and an Aspherical lens design by sphereical geometry”,Proceeding of SPIE-The international Society for Optical Engineering 1985 International Len Design Coference.v554,pp.197-203.