[1] LI Jingyan, LIU Desen, LIU Gang et al. Application and development trends of medical endoscopic optical systems[J]. Medical Equipment, 9-12(2005).

[2] CHEN Qing. Research on key technologies of medical endoscopy[J]. Chinese Medical Equipment, 30, 68-70(2015).

[3] JIANG Changsong, JI Jun, HUANG Zengyue et al. Research on quality control testing technology for optical performance of medical rigid endoscopes[J]. China Testing, 39, 24-26(2013).

[4] State Food and Drug Administration [S]. Medical rigid endoscopes-part 1: optical properties and test methods: YY 0068.1-2008(2008).

[5] LIU Yong, GAO Li, SONG Chunyi et al. Analysis of factors affecting the quality of endoscopic imaging and image restoration[J]. General Practice Clinical and Education, 8, 495-497(2010).

[6] XU M F, WANG L Q, YUAN B. Auto white-balance algorithm of high definition electronic endoscope[J]. Infrared Laser Engineering, 43, 3110-3115(2014).

[7] JI Jun, WANG Yunlong, YUAN Qing et al. Design and research of a qualitative testing device for optical performance of medical endoscope systems[J]. China Medical Equipment, 12, 15-18(2015).

[8] LIU Yanzhen, MENG Xiangfeng, WANG Hao et al. Study on the light efficiency and detection methods of medical rigid endoscopes[J]. China Medical Equipment, 31, 53-55(2016).

[9] YAN Qinglai, JIA Xiaohang, MA Jun. Evaluation method for the efficiency of medical endoscope's light energy transfer[J]. Journal of China Institute of Metrology, 256-259(2008).

[10] ZHAI Xiaohao. Design of optical parameter measurement system for hard tube endoscope[D](2016).

[11] GUAN Limei. Design of a fixed and adjustable tool for quality control of soft endoscopes[J]. Medical Equipment, 26, 28(2013).

[12] MENG Xiangfeng, WANG Hao, LIU Yanzhen et al. Uncertainty analysis of medical rigid optical endoscopy detection using integrated devices[J]. China Medical Equipment, 32, 16-19(2017).

[13] JIA Xiaohang, YAN Qinglai, MA Jun et al. Study on the evaluation method of edge light efficiency of medical rigid endoscopes[J]. Acta Photonica Sinica, 1869-1873(2008).

[14] LIU Yanzhen, MENG Xiangfeng, WANG Hao et al. Research on the uniformity measurement device for cold light sources in medical endoscopes[J]. China Medical Equipment, 31, 33-35(2016).

[15] FAN Xiang, HUANG Zhiqiang, HUANG Deqiu et al. Introduction to comprehensive testing equipment for optical performance of rigid endoscopes[J]. Chinese Medical Device Information, 19, 44-47(2013).