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RadTech
UV/EB Technology Conference & Expo 2008
May 4-7, 2008
Lakeside Center at McCormick Place
Chicago, Illinois - United States of America
EQUIPMENT
Electrodeless Microwave
UV Lamps. Geometry, Spectra, Integrated Reflectors.
Vladimir Danilychev, Quantum Technologies
Abstract:
Physics, technology and design of Large Diameter and Length Electrodeless
Microwave UV Lamps is presented. Geometry, materials, and integrated
reflectors for electroless lamps design developed for multi-lamp operation
are discussed. Spectra and UV output power of fluorescent electrodeless
microwave lamps are presented.
Pulsed
UV Light for Heat Sensitive Continuous Motion Applications
Kent Kipling, Xenon Corporation
Abstract: The inherent benefits of high intensity pulsed
UV lamps, low heat, excellent depth of penetration, cool cures,
and energy efficiency are well known. Traditionally, these benefits
were only available for indexing applications where the cure target
is held in a fixed position in front of the lamp. Recent advances
in bulb geometries, pulse rates and lamp wattages are making pulsed
UV lamps the solution of choice for heat sensitive continuous motion
applications. Illustrating the benefits of applying this technology
to wood coating is Delle Vedove's new systems for vacuum and roll
coating.
The
Effects of a DC-Powered UV Lamp System on the Homogeneity
of UV-Polymerized Films
Timothy Morales, University of Houston-Downtown
Abstract: A project was undertaken to investigate the effects
on the homogeneity of UV-polymerized films of using a DC-powered
UV lamp system. A more conventional AC-powered lamp was used as
a control. Previous reports indicated that a DC-powered lamp should
produce a more homogeneous film at the molecular scale. A further
object of the investigation was to determine whether or not the
expected changes in homogeneity produced noticable changes in polymer
film properties. It was assumed that a more homogeneous film would
be a "better" film. This project was designed to test
this hypothesis.
UV
LED Lens Technology
Richard Sahara, Clearstone Technologies
Inc.
Abstract: High power, large area LED arrays tend to be distributed
light sources with Lambertian emission patterns. Therefore, compared
to traditional mercury bulb UV light sources, UV LEDs need new and
innovative optical design strategies to control and deliver light
to the materials being processed. We present quantitative improvements
in practical working distance and optical power densities for UV
LED arrays using advanced lens designs.
Novel Ultra-high Power UV LEDs
Robert F. Karlicek, Jr. Ph.D, Luminus Devices, Inc.
Abstract:
Recent technical breakthroughs in the application of photonic lattice technology to LED design have enabled the development of large UV LED devices with unprecedented UV output power. This technology, which has been deployed commercially in visible LEDs for display applications for several years, has now been extended to wavelengths below 400 nm, with output irradiance levels ranging from 40 to 80 W/cm2 at the chip surface. These single chip high power LEDs also employ advanced high power packaging technology and can operate reliably at input currents (up to 18 A CW) to produce irradiance levels that rival those obtained from Hg lamps. This talk will review the fundamentals of LED technology, the unique features of these new types of LEDs, and the potential for their use in UV curing applications.
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