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8 September 2015 Integration design of endoscopes with different viewing directions
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High definition and magnification rigid endoscope is a significant equipment in the examination and surgery. In this paper, the design of a high definition (HD) rigid endoscope is presented with a FOV of 70°. The entrance pupil is 0.3 mm, achieved for the first time to our best knowledge. For the fabricated prototype, the theoretical resolution is 22.3 lp/mm at an object distance of 20 mm, the depth of field (DOF) is 115 mm and the stray light is eliminated effectively. The viewing angle of the developed endoscope is zero. However, the endoscope with non-zero viewing angle is more popular in some conditions, we present two designs with non-zero viewing direction for better observation and diagnosis of lesions on inner walls of organs and tissues.
© (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Lingyun Zhang, Dewen Cheng, and Yongtian Wang "Integration design of endoscopes with different viewing directions", Proc. SPIE 9578, Current Developments in Lens Design and Optical Engineering XVI, 957807 (8 September 2015);


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