赵建科, 周艳. 小视场长焦距镜头畸变高精度测量研究[J]. 应用光学, 2008, 29(3): 380-384.
引用本文: 赵建科, 周艳. 小视场长焦距镜头畸变高精度测量研究[J]. 应用光学, 2008, 29(3): 380-384.
ZHAO Jian-ke, ZHOU Yan. High precision distortion measurement of NFOV long-focus lens[J]. Journal of Applied Optics, 2008, 29(3): 380-384.
Citation: ZHAO Jian-ke, ZHOU Yan. High precision distortion measurement of NFOV long-focus lens[J]. Journal of Applied Optics, 2008, 29(3): 380-384.

小视场长焦距镜头畸变高精度测量研究

High precision distortion measurement of NFOV long-focus lens

  • 摘要: 利用由精密测角仪、显微摄像测量系统、微型双光栅平面干涉仪、平行光管以及星点组成畸变测量系统,对小视场长焦距的镜头进行畸变测量。在计算镜头畸变中,利用中心视场区域内畸变设计无穷小,采用三次多项式拟和的方法,计算镜头理论焦距;在边视场采用像高高次方和视场角正弦高次方加权平均的方法对测量偏差角进行修正,得到各视场的相对和绝对畸变。通过实际测量和计算验证,镜头全视场畸变测量精度可达到0.02%。

     

    Abstract: A distortion measurement system, which is composed of high-precision goniometer, microscope measurement system, mini double-grating interferometer, collimator and star point, is used to measure the distortion of the NFOV long-focus lens precisely. Using third order polynomial fitting in center area of FOV, the theory focal length also can be computed. The measured deviation angle was corrected with the weighted mean of the high order of image height and the sine of the view angle at the edge field to acquire the relative and absolute distortion of each FOV. The results of the actual measurement and calculation show that the measurement accuracy of full FOV distortion can reach 0.02%.

     

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