• Technical Conference: 

    09 – 14 May 2021

  • Exhibition: 

    10 – 14 May 2021


Registration sponsors


*To qualify for the member rates through APS, you must be a member of both APS and DLS (Division of Laser Science). Please email membership@aps.org or call +1.301.209.3280 in case you experience difficulties when registering.
**To access member rates, please use the email address associated with your membership profile.

Download the Registration Form pdf

Virtual Registration Types and Rates

Full Conference
Access to all content including Technical Sessions, Plenary Sessions, Poster Sessions, Applications & Technology Topical Reviews, Special Symposia, Workshops, Virtual Exhibition, Technology Showcases and Special Events and Programs. Also includes access to Conference Papers and Postdeadline Papers. The Technical Digest Papers and ability to view recorded technical sessions on demand will be available for 60 days after the conference concludes.

Full Conference – Member USD 438.00
Full Conference – Non-Member USD 653.00
Full Conference – Student Member USD 192.00
Full Conference – Student Non-Member USD 278.00
Full Conference – Exhibitor USD 438.00

Exhibits Pass Plus
Access to select content including the Virtual Exhibition, Plenary Sessions, Workshops, Technology Showcases and Special Events and Programs.

Exhibits Pass Plus USD 0.00
Exhibitor Booth Personnel USD 0.00

Short Course Only
Admission to selected Short Course(s) and accompanying Digital Short Course Notes. Also includes the Virtual Exhibition, Plenary Sessions, Workshops, Technology Showcases and Special Events and Programs. View the list of available Short Courses.

Half-Day Course – Member USD 305.00
Half-Day Course – Non-Member USD 375.00
Half-Day Course – Student Member USD 80.00
Half-Day Course – Student Non-Member USD 90.00


Important Information


All speakers must be registered by 23:59 EDT (UTC-04:00) on Friday, 30 April 2021.


Policies and Terms of Registration

Reasonable policies and terms of registration 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 online participants 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.



Credit cards are accepted (VISA, MasterCard and American Express). Payments made by check or wire transfer must be made payable to The Optical Society in US dollars and drawn on a US bank. Payment must accompany your registration form in order to process your registration order. 


Refund and Cancellation Policy

All requests for refunds must be received in writing by Thursday, 22 April 2021. A USD 75.00 service charge will be assessed for processing refunds. All registrations received after Thursday, 22 April 2021 are NON-REFUNDABLE. Please allow four to six weeks for processing.



CLEO 2021
c/o CompuSystems, Inc.
2651 Warrenville Rd. Suite 400
Downers Grove, IL 60515
Fax +1 708.344.4444
Registration Customer Service

For questions regarding registration, please contact the CLEO Registration Customer Service via phone or email. Customer Service hours are from 09:00 - 17:00 Central Daylight Time (CDT, UTC-5:00).

Phone: + 1 224.563.3173
email: cleo@csreg.zohodesk.com

Code of Conduct

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