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

  • College of Optical and Electronical Information, Changchun University of Science and Technology, Changchun 130012, China

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  • Received Date: July 06, 2017
  • Revised Date: August 09, 2017
    Graphical Abstract
    • 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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    • References (15)
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