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ExciRay System

GEW’s ExciRay lamp produces vacuum ultraviolet radiation for a range of applications and can be seamlessly integrated onto machinery up to 2.55m wide.

ExciRay lamps

GEW’s ExciRay lamp systems utilise dielectric barrier discharge (DBD) lamps to produce quasi-monochromatic vacuum ultraviolet radiation, typically at 172nm. This radiation is commonly used for mattification of surface coatings, modification of surface tension for improved adhesion or surface cleaning for semiconductor and medical industries.

GEW ExciRay lamps, which are incorporated into the familiar NUVA2 cassette design, can be produced up to 255cm in length and can be custom integrated for your specific application, including provision for all required nitrogen inerting and control.

They are also seamlessly integrated into the wider GEW UV system which may be required for gelling or final cure so that GEW can provide a turnkey mattification solution for your process. Our experienced engineers also ensure rigorous adherence to international safety standards.

ExciRay lamphead from GEW UV, with Excimer curing technology.

ExciRay Mattification Process

Mattification of coatings for various applications, including decorative laminates for:

  • Flooring and furniture, PVC flooring, wood panels, plastic parts, etc.:
  • Gelling: Partially cures the coating, increasing its viscosity to resist subsequent ExciRay microfolding. Changing gelling power can modify coating texture, 85° gloss level and soft touch properties. Typically not inerted.
  • Mattification: 172nm radiation from the ExciRay lamp fully cures the top layer of coating and shrinkage causes microfolding, which results in a matt surface. This process must be inerted.
  • Final cure: A powerful mercury or LED lamp cures the coating all the way through. This can optionally be inerted depending on application requirements.

To find out more about the mattification process using Excimer lamps, read Jennifer Heathcote’s “Mattifying Surfaces with Excimer UV Curing” article.


Benefits of ExciRay

  • Deep matt down to 1.2 gloss units @60 deg
  • Soft touch finishes
  • No matting agents for increased coating durability and process simplification
  • On/off instantaneous matting
  • Fully integrated into pre-gelling and final cure UV system
  • Familiar cassette design for easy lamp change and maintenance
  • Integrated into GEW’s standard Rhino power and control platform
Wood coating integration example, using GEW excimer lamps

ExciRay Specification

Max electrical power5W / cm
Peak wavelength172nm*
Max irradiance at focal point65mW / cm²
Maximum length255cm
Standard cross section145mm W x 425mm H
CoolingN2
Standard max operating temperature40°C (104°F)
Standard max humidityNon-condensing
*222nm & 308nm available on request.

Typical ExciRay integration

Each integration of ExciRay is fully customised to meet the individual needs of our customer. GEW’s range of products can be used in unison to cover the full process, from pre-gelling, to mattification, through to the final cure.

In the example below, GEW uses a 395nm LeoLED for the pre-gelling, ExciRay for the mattification, before using GEW’s NUVA2 mercury arc curing system for the final cure.

  1. Pre-gelling: 395nm LeoLED
  2. Mattification: 172nm ExciRay
  3. Final cure: Mercury lamp NUVA2
  4. Height adjustment control panel
  5. Fully automated nitrogen control cabinets
  6. Inert chamber with adjustable nitrogen injectors
  7. Safety light curtains


Custom Conveyor Lab Units

ExciRay can be incorporated into a GEW Custom Conveyor Lab Unit for quality control and R&D applications.

Any combination of GEW lamp, LED and Excimer are available with or without nitrogen inerting.

GEW’s Conveyor Laboratory Unit

Lab Units are available in multiple widths and speed ranges.

Visit our Lab Units page for more information.


Speak directly to a sales representative

These products use excimer (or exciplex) dielectric barrier discharge (DBD) lamps as the UV light source. Primarily used to produce vacuum ultraviolet (VUV) radiation, GEW can supply many variations and widths to suit a wide range of applications.

To find out more about ExciRay, contact us now on one of the options below.

David Lyus GEW

Region, UK:
David Lyus
International Sales Manager

T: +44 7713 085 381

Email David directly

Jennifer Heathcote GEW

Region, Americas:
Jennifer Heathcote
Vice President, Business Development

T: +1 440 381 5606

Email Jennifer directly

Marcus Greenbrook GEW

Region, International:
Marcus Greenbrook
Director, International Sales

T: +44 7764 986 911

Email Marcus directly