• Technical Conference:  05 – 10 May 2024
  • The CLEO Hub: 07 – 09 May 2024


Request CLEO Notifications

Get 2024 CLEO Conference and Exhibition information.


Important Information

Registration Access

Full Technical registrants have access to download papers individually or in a .zip file for 60 days after the conference has concluded. 

Health and Safety Requirements

CLEO follows the guidance of The Centers for Disease Control (CDC) as it relates to COVID-19 and other communicable diseases along with local requirements to meet safely. Proof of vaccination may be required. Requirements are subject to change.

Code of Conduct

It is important to the success of this meeting that every attendee be treated with consideration and respect. Please review the Code of Conduct and Anti-Harassment policy.


Only credit card payments are accepted (VISA, Mastercard, American Express, Discover, Diners Club) during online registration.

Payments made by check or wire transfer must be made payable to Optica in US dollars and drawn on a US bank. Payments must accompany your registration form in order to process your registration order. 

Policies and Terms of Registration

Reasonable Event Policies and Terms have been established for CLEO. We encourage you to read these carefully as all registrants to CLEO will be required to agree to these policies and terms as a condition of registration.

Privacy Policy

CLEO and its co-sponsors respect the privacy rights of our visitors and recognize the importance of protecting all information that you may choose to share with us. To further this commitment, we have adopted this Privacy Policy to guide how we collect, store and use the information you provide to us.

Refund and Cancellation Policy

Cancelling a Registration: Refund requests must be received in writing by Tuesday, 18 April 2023. A processing service charge of USD 75 will be assessed. Cancellation requests submitted after Tuesday, 18 April 2023 WILL NOT BE CONSIDERED. Please allow four to six weeks to process a refund request.


c/o MCI USA | Dallas

6100 W Plano Pkwy #3500
Plano, TX  75093