The Challenges of Transitioning UV Curing from Lamp to LED

The Technical Challenges of Transitioning your UV Curing Process from Lamp to LED

Transcript

2. Excelitas Technologies Multi-zone Irradiance Control in UV LED Systems for Uniform Curing of Non-Linear Surfaces Mike Kay Director of Product Management, OmniCure®
3. Who We Are • Lumen Dynamics was acquired by Excelitas Technologies Company in November 2013 • Excelitas has over 5,000 employees worldwide • Global network of design and manufacturing locations in the Americas, Europe and Asia • Design and creation of innovative UV curing solutions since 1984 • Over 35,000 UV curing systems currently being used in more than 50 countries • Lamp and LED UV systems
4. Advantages of LED • LED systems have many functional advantages over lamp-based systems ‒ Longer life, reduced energy, lower heat, lower maintenance, instant on/off, Hg free • Modular LED arrays allows for multi-zone irradiance control ‒ Customizable output profiles to achieve uniform curing ‒ Offers potential of further benefits
5. LED Arrays Designed for Multi-zone Irradiance Control • LED building blocks ‒ Arrays made up of multiple smaller modules • Patented technology to allow for individual control of module segments within array ‒ Increase flexibility ‒ Customize output profile
6. • Optical output of LED modules at same input will vary • Results in non-uniform curing across array +/- 13% Output measured at 1mm – no lens Uniformity of LED Array • All modules at same input power
7. • Optical output of LED modules will have tighter tolerance ‒ Results in uniform curing across LED array +/-5% Uniformity of LED Array • Adjust input to modules to achieve uniform output
8. Compensation of Edge Effects • Irradiance drops off at the edges of array – Reduces cure width • Increase irradiance on end modules – Increase useable exposure area
9. Multiple Cure Widths • Selectively turn on only the LED modules required • Increases flexibility when curing multiple widths on same machine
10. Curing on Non-Linear Surfaces • 3D objects present challenges for curing • Radius of parts change working distance from UV head – Different output seen at substrate results in non-uniform curing
11. Irradiance vs Working Distance • Small changes in working distance can have significant effect on irradiance – 10% drop with 2mm increase in working distance • Potential for uneven curing of 3D objects – Under curing objects further away or over curing objects that are closer
12. Irradiance vs Working Distance • Customize irradiance profile to match shape and working distance of parts
13. Custom Profiles for 3D parts
14. Thank You Questions? Contact: Mike Kay Director of Product Management, OmniCure Excelitas Technologies uv.eb West 2015: Booth #42 Mike.Kay@excelitas.com 14