LED Technology
SCHOTT launches new ColdVision MC-LS LED light source
W S
ith the ColdVision MC-LS, the SCHOTT technology group has developed a LED light source that combines a
maximum light output of 850 lumens with easy operation in a compact housing. New features such as a USB port and legacy analog inputs enable the light source to be controlled remotely. Compatibility with all SCHOTT ColdVision series light guides ensure homogeneous illumination and a wide range of applications.
“With the MC-LS, we have succeeded in developing a light source that covers all standards of stereo microscopy, material science, and machine vision applications at
an attractive price,” says Dr Werner Sklarek, senior product manager Industrial at SCHOTT Lighting and Imaging. “To achieve this, we focused on high light quality and essential features.”
The user benefits from a stable light output with a constant colour temperature of 5400 kelvin. A low energy consumption of 60 watts and service life of 50,000 maintenance-free operating hours not only save operational costs but also reduce downtime from lamp replacements. The brightness of the LED source can be continuously dimmed via a potentiometer. The user is no longer affected by “halogen glow” or colour shifts that are typical when using traditional halogen sources at low
light levels.
Connections that make a difference
In addition to a 9-pin connector for analog control, an integrated USB port and RS232 interface provide accurate and digital remote control of the MC-LS. The light source can help streamline processes because important settings can be
controlled remotely and integrated into application software. This allows the user to switch the light source on and off remotely, set the brightness between 0 and 100 percent, and read out data automatically.
Because the MC-LS is smaller than its predecessor models ACE and DCR, it can easily be used to replace these sources. A robust metal housing makes the light source resistant to vibration, shocks and heat while imparting a high-quality feel and appearance. An integrated ergonomic fan enables low-noise operation for undisturbed work.
schott.com
Designing energy efficient, high output, tinted LEDs
cientists have combined experimental data gathered at the Canadian Light Source at the University of Saskatchewan and theoretical data to build deep
insight into two types of light emitting crystals for next-generation LEDs.
“When we have means of creating more efficient lighting, this has a huge environmental impact,” says Alexander Moewes, Canada Research Chair in Materials Science with Synchrotron Radiation at the
University of Saskatchewan, who cites that lighting accounts for 15-20 per cent of global electricity consumption, and therefore for roughly 5 per cent of worldwide greenhouse gas emissions.
His work to improve LED technology focuses on finely tuning and understanding the effect of different crystals in LED phosphors to get precise performance properties, including colour and amount of light output. “Getting these properties right is important, since our eyes are incredibly sensitive to the
colour of light, whether it is too green or red,” explains Moewes. Moewes and Ph.D. student Ruhul Amin collaborate closely with Lumileds in Aachen, Germany, the world’s third largest LED manufacturer, in order to directly apply this fundamental research to real-world solutions.
Their most recent publication in Advanced Optical Materials lays the groundwork for informed design of LED materials, the direction Moewes hopes to move the team’s work towards. All
energy levels, band gaps and luminescence wavelengths were measured at beamlines at the CLS. The band gap was also confirmed by calculations.
“We now study how different host crystals affect performance. We want to go the other way and design them through informed decisions guided by our calculations before the material is synthesised,” he says. Their calculations are a key part of the team’s success, along with the use of cutting-edge experimental techniques. The comparison of real-world measurements enabled by custom built experimental tools at CLS and their calculations provides more detailed insight. The equipment they built at the REIXS beamline at CLS for this work allowed them to specifically look at the energy levels within europium and when light is released because electrons transition in the material between energy levels. The Moewes team was the first to devise a technique to take these measurements.
Armed with this information which confirms the power of their predictive models, the group can begin the work of designing finely tuned crystal structures for low energy loss, high output, perfectly tinted LEDs for lighting applications.
lightsource.ca
30 February 2021 Components in Electronics
www.cieonline.co.uk
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