Extended Depth-of-Field of a Miniature Optical Endoscope Using Wavefront Coding
Endoscopic imaging is an indispensable tool for visual inspection of surfaces in hard-to-access places. The conventional optical endoscope only enables imaging the regions that lie close to the focal plane, and therefore improving the depth of field (DOF) of an endoscopic system has recently attract...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-05-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/10/11/3838 |
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| author | Lei Yang Meng Chen Jin Wang Meng Zhu Tong Yang Shimin Zhu Hongbo Xie |
| author_facet | Lei Yang Meng Chen Jin Wang Meng Zhu Tong Yang Shimin Zhu Hongbo Xie |
| author_sort | Lei Yang |
| collection | DOAJ |
| description | Endoscopic imaging is an indispensable tool for visual inspection of surfaces in hard-to-access places. The conventional optical endoscope only enables imaging the regions that lie close to the focal plane, and therefore improving the depth of field (DOF) of an endoscopic system has recently attracted much attention. Here, we propose and demonstrate a simple, cost-effective, and easily available industrial endoscopic system, which is composed of a rigid tube and group of optical lenses. The outer diameter of the designed endoscopic modality presented in this article is 3 mm. By employing the wavefront coding technique, the DOF of newly-designed endoscope was extended to 2.7 mm in the proof-of-concept experiment, which is an increase of almost 10 times compared to the initial counterpart. |
| first_indexed | 2024-03-10T19:28:28Z |
| format | Article |
| id | doaj.art-313d358c02f64e66840b12feb453d8e5 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T19:28:28Z |
| publishDate | 2020-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-313d358c02f64e66840b12feb453d8e52023-11-20T02:22:11ZengMDPI AGApplied Sciences2076-34172020-05-011011383810.3390/app10113838Extended Depth-of-Field of a Miniature Optical Endoscope Using Wavefront CodingLei Yang0Meng Chen1Jin Wang2Meng Zhu3Tong Yang4Shimin Zhu5Hongbo Xie6School of Precision Instruments and Optoelectronics Engineering, Key Laboratory of Optoelectronics Information Technology, Tianjin University, Ministry of Education, Tianjin 300072, ChinaSchool of Precision Instruments and Optoelectronics Engineering, Key Laboratory of Optoelectronics Information Technology, Tianjin University, Ministry of Education, Tianjin 300072, ChinaSchool of Physics and TEDA Applied Physics, Key Laboratory of Weak-Light Nonlinear Photonics, Nankai University, Ministry of Education, Tianjin 300071, ChinaTianjin Jinhang of Technical Physics, Tianjin 300308, ChinaSchool of Precision Instruments and Optoelectronics Engineering, Key Laboratory of Optoelectronics Information Technology, Tianjin University, Ministry of Education, Tianjin 300072, ChinaTianjin Jinhang of Technical Physics, Tianjin 300308, ChinaSchool of Precision Instruments and Optoelectronics Engineering, Key Laboratory of Optoelectronics Information Technology, Tianjin University, Ministry of Education, Tianjin 300072, ChinaEndoscopic imaging is an indispensable tool for visual inspection of surfaces in hard-to-access places. The conventional optical endoscope only enables imaging the regions that lie close to the focal plane, and therefore improving the depth of field (DOF) of an endoscopic system has recently attracted much attention. Here, we propose and demonstrate a simple, cost-effective, and easily available industrial endoscopic system, which is composed of a rigid tube and group of optical lenses. The outer diameter of the designed endoscopic modality presented in this article is 3 mm. By employing the wavefront coding technique, the DOF of newly-designed endoscope was extended to 2.7 mm in the proof-of-concept experiment, which is an increase of almost 10 times compared to the initial counterpart.https://www.mdpi.com/2076-3417/10/11/3838optical endoscopedepth of fieldphase maskwavefront coding |
| spellingShingle | Lei Yang Meng Chen Jin Wang Meng Zhu Tong Yang Shimin Zhu Hongbo Xie Extended Depth-of-Field of a Miniature Optical Endoscope Using Wavefront Coding Applied Sciences optical endoscope depth of field phase mask wavefront coding |
| title | Extended Depth-of-Field of a Miniature Optical Endoscope Using Wavefront Coding |
| title_full | Extended Depth-of-Field of a Miniature Optical Endoscope Using Wavefront Coding |
| title_fullStr | Extended Depth-of-Field of a Miniature Optical Endoscope Using Wavefront Coding |
| title_full_unstemmed | Extended Depth-of-Field of a Miniature Optical Endoscope Using Wavefront Coding |
| title_short | Extended Depth-of-Field of a Miniature Optical Endoscope Using Wavefront Coding |
| title_sort | extended depth of field of a miniature optical endoscope using wavefront coding |
| topic | optical endoscope depth of field phase mask wavefront coding |
| url | https://www.mdpi.com/2076-3417/10/11/3838 |
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