| Date | Name | Location |
| Sep 06-10 | EOS Annual Meeting (EOSAM) 2021 | Italy |
| Sep 13 | 21st Annual J A Woollam Spectroscopic Ellipsometer Workshop | United Kingdom |
| Sep 13-16 | SPIE Remote Sensing | Spain |
| Sep 13-16 | SPIE Security + Defence | Spain |
| Sep 13-16 | SPIE Optical Systems Design | Spain |
| Sep 13-17 | EOS Annual Meeting (EOSAM) 2021 | Italy |
| Sep 14-16 | J A Woollam CompleteEase Software Training Course 2021 | United Kingdom |
| Sep 26-30 | SPIE Photomask Technology + Extreme Ultraviolet Lithography | United States |
| Sep 28-30 | SPIE Photonex + Vacuum Expo 2021 | United Kingdom |
| Sep 28-30 | SPIE Photonex + Vacuum Technologies | United Kingdom |
| Sep 28-30 | SPIE Space, Satellites + Sustainability | United Kingdom |
