Abstract
In order to improve the test accuracy of CCD, a new type of CCD device is proposed. Several columns (rows) of photoelectric diodes (PDs) are combined together, and staggered with the distance of H 1=H/N, where H is the space between two adjacent PDs, and N is the number of columns (rows). The photoelectric signals are collected simultaneously by multi-channel A/D, and the accurate measurement result is obtained through appropriate signal processing. Without changing the size or space of PDs, more photographic pixels are arranged in the given direction within a finite length. Diameters of three standard poles are measured by a single CCD and two staggered CCDs, respectively with length of 30 mm and diameters of 5 mm, 8 mm and 12 mm, respectively. The results show that the accuracy of double staggered CCDs is two times of that of single CCD. The new type of CCDs can avoid the impact of PD space theoretically and higher measurement accuracy can be obtained.
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This work has been supported by the National Natural Science Foundation of China (No.51005188), the Fund of Key Laboratory of Manufacturing and Automation of Xihua University (No.SZJJ2009-023), and the University Talent Foundation of Xihua University (No.R0720221).
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Wang, Hs., Zhu, Wb., Wang, Q. et al. Design and analysis for a high-accuracy CCD. Optoelectron. Lett. 7, 167–170 (2011). https://doi.org/10.1007/s11801-011-0132-x
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DOI: https://doi.org/10.1007/s11801-011-0132-x