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Wang, Weibo, Chao Wang, Jian Liu, and Jiubin Tan. 2016. "Wide-Spectrum Microscope with a Long Working Distance Aspherical Objective Based on Obscuration Constraint" Sensors 16, no. 11: 1886. https://doi.org/10.3390/s16111886

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Wang W, Wang C, Liu J, Tan J. Wide-Spectrum Microscope with a Long Working Distance Aspherical Objective Based on Obscuration Constraint. Sensors. 2016; 16(11):1886. https://doi.org/10.3390/s16111886

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Wang, W.; Wang, C.; Liu, J.; Tan, J. Wide-Spectrum Microscope with a Long Working Distance Aspherical Objective Based on Obscuration Constraint. Sensors 2016, 16, 1886. https://doi.org/10.3390/s16111886

Wang, Weibo, Chao Wang, Jian Liu, and Jiubin Tan. 2016. "Wide-Spectrum Microscope with a Long Working Distance Aspherical Objective Based on Obscuration Constraint" Sensors 16, no. 11: 1886. https://doi.org/10.3390/s16111886

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Wang, W.; Wang, C.; Liu, J.; Tan, J. Wide-Spectrum Microscope with a Long Working Distance Aspherical Objective Based on Obscuration Constraint. Sensors 2016, 16, 1886. https://doi.org/10.3390/s16111886

Abstract: We present an approach for an initial configuration design based on obscuration constraint and on-axis Taylor series expansion to realize the design of long working distance microscope (numerical aperture (NA) = 0.13 and working distance (WD) = 525 mm) with a low obscuration aspherical Schwarzschild objective in wide-spectrum imaging (λ = 400–900 nm). Experiments of the testing on the resolution target and inspection on United States Air Force (USAF) resolution chart and a line charge-coupled device (CCD) (pixel size of 14 μm × 56 μm) with different wavelength light sources (λ = 480 nm, 550 nm, 660 nm, 850 nm) were implemented to verify the validity of the proposed method. Keywords: wide-spectrum microscope; aspherical Schwarzschild objective; low obscuration; long working distance

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Wang W, Wang C, Liu J, Tan J. Wide-Spectrum Microscope with a Long Working Distance Aspherical Objective Based on Obscuration Constraint. Sensors. 2016; 16(11):1886. https://doi.org/10.3390/s16111886

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A vision system combines industrial cameras, lenses, and lighting to automate visual inspections of manufactured products. KEYENCE vision systems are controller ...