Chinese Optical Society
| Abbreviation | COS | 
|---|---|
| Founded | December 20, 1979 | 
| Founder | Wang Daheng Gong Zutong Qian Linzhao | 
| Type | Professional organization | 
| Focus | Optics and photonics | 
| Location | 
 | 
| Area served  | China | 
| Members | 15,000 | 
| Key people | Gong Qihuang | 
| Parent organization | China Association for Science and Technology | 
| Website | www | 
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 has 21 specialized committees and 7 working committees with more than 15,000 individual members.