吴爽, 向阳. 90°视向角内窥远心测量仪的光学设计[J]. 应用光学, 2017, 38(6): 890-895. DOI: 10.5768/JAO201738.0601006
引用本文: 吴爽, 向阳. 90°视向角内窥远心测量仪的光学设计[J]. 应用光学, 2017, 38(6): 890-895. DOI: 10.5768/JAO201738.0601006
Wu Shuang, Xiang Yang. Optical design of endoscope telecentric measuring instrument with 90° visual angle[J]. Journal of Applied Optics, 2017, 38(6): 890-895. DOI: 10.5768/JAO201738.0601006
Citation: Wu Shuang, Xiang Yang. Optical design of endoscope telecentric measuring instrument with 90° visual angle[J]. Journal of Applied Optics, 2017, 38(6): 890-895. DOI: 10.5768/JAO201738.0601006

90°视向角内窥远心测量仪的光学设计

Optical design of endoscope telecentric measuring instrument with 90° visual angle

  • 摘要: 针对深腔内深孔、微小孔或盲孔等, 由于受到腔体尺寸形状和腔体结构的限制,导致对腔体内表面的检测及腔体内孔径形位信息的检测有很大的难度, 设计了一种检测腔内小孔特征以及腔内状态的内窥镜光学探头。该探头为具有90°视向角、20 mm大景深、高分辨率的细径内窥镜,其放大倍率为-0.71×,最大畸变为0.5%,全视场MTF在166 lp/mm处接近0.1,孔径检测精度为0.01 mm,分辨率为0.005 mm,且光学系统外径小于5 mm,可用于对腔体直径范围15 mm~45 mm、孔径直径范围0.01 mm~4 mm的腔体零件内微小孔径形位信息的检测。

     

    Abstract: For the deep holes, tiny holes or blind holes within deep cavity, due to the limitation of the size, shape and structure of cavity, it is very difficult to detect the inner surface and the aperture location information in the cavity.Aiming at this problem, an endoscope optical probe for detecting the small hole features and state in cavity was designed.This probe is a small diameter endoscope which can achieve 90 ° angle of view, 20 mm large depth of field with the large magnification of -0.71×, the maximum distortion of 0.5%, and the full field-of-view modulation transfer function(MTF)near 0.1 at 166 lp/mm.The aperture detection accuracy is 0.01 mm, the resolution is 0.005 mm, and the optical system outer diameter is less than 5 mm.It can be used for detecting small aperture shape and location information in cavity parts with the cavity diameter range of 15 mm~45 mm and the aperture diameter range of 0.01 mm~4 mm.

     

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