Chinese Optical Society (simplified Chinese: 中国光学学会; traditional Chinese: 中國光學學會; pinyin: Zhōngguó Guāngxué Xuéhuì; abbreviated COS) is a professional association of individuals with an interest in optics and photonics. It sponsored the Chinese Optics Letters, a monthly peer-reviewed scientific journal focusing on optics. As of 2019, the society...