Acta Optica Sinica, Volume. 38, Issue 2, 0222003(2018)
Design of Electronic Endoscope Optical System Based on Microlens Array
Figures & Tables(8)
Fig. 3. Initial system. (a) Initial layout of electronic endoscope; (b) MTF curves of initial system
Fig. 4. Optical layout of electronic endoscope. (a) Overall structure; (b) partial enlarged structure
Fig. 5. Imaging performance of the electronic endoscope optical system. (a) MTF curves; (b) spot diagram; (c) field curvature and distortion
Table 1. Main design parameters of the electronic endoscope objective system
View tableTable 1. Main design parameters of the electronic endoscope objective system
Parameter Specification Wavelengths /nm 486, 588, 656 Effective focal length /mm 1.55 F number4.2 Field of view /(°) 110 MTF /(lp·mm-1) ≥30%@120 Working distance /mm 20 Maximal clear aperture size /mm ≤3.2 Overall length /mm <8
Table 2. Residual aberrations of the electronic endoscope optical system
View tableTable 2. Residual aberrations of the electronic endoscope optical system
Aberration Value /mm Spherical aberration 1.2×10-3 Coma 7.2×10-4 Astigmatism 3.5×10-3 Field curvature 2.5×10-3 Axial chromatic aberration -1.9×10-4 Lateral chromatic aberration -1.8×10-3
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Danyi Wang, Changxi Xue, Chuang Li, Hongfang Yang. Design of Electronic Endoscope Optical System Based on Microlens Array[J]. Acta Optica Sinica, 2018, 38(2): 0222003
Paper Information
Category: Optical Design and Fabrication
Received: Sep. 11, 2017
Accepted: --
Published Online: Aug. 30, 2018
The Author Email: Xue Changxi (xcx272479@sina.com)
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