The 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT 2018) will be held in the beautiful city of Chengdu, China, June 26-29, 2018. AOMATT is a well-known international symposium on the design, manufacturing, and testing of optical components and systems. It features high quality plenary presentations by leading experts, parallel oral sessions, poster sessions, banquet, and tours to local attractions. All accepted papers will be published in SPIE Proceedings and SPIE Digital Library. SPIE Proceeding papers are indexed by major scientific and engineering databases including INSPEC, EI Compendex, International Aerospace Abstracts, etc.