OPTOELECTRONICS
LED chip-on board delivers up to 185lm/W
at 3000K 80 CRI
Bridgelux announced its eighth generation of LED chip-on
board (COB) products, delivering up to 185 lm/W across its V
Series, Vero Series and Vero SE Series
product families at nominal drive current.
This performance is benchmarked at the
popular 3000K 80 CRI colour point, with
efficacies above 200 lm/W possible at
other colour points across the industry
s broadest range of COB products. The
devices’ nominal light output has been
optimized to align with traditional lamp
standards and are delivered with a standard warranty of up to
10 years. The new series boast up to 10% energy efficiency
improvements compared to previous product generations. The
LED COBs feature up to 3x overdrive capability, delivering a
30% increase in maximum lumens per LES size, and increased
lumens per dollar, further reducing the cost of solid-state lighting.
The company offers a broad range of COB size and performance
options from LES 8mm to LES 29mm. New products
under development include the Vesta Thrive COB, a tunable
white natural spectrum light source; expansions in the Vesta
Flex dual channel driver and controls family to now include
Casambi and Silvair control modules; and the new Vesta SE,
the first dim-to-warm and tunable white COBs with integrated
holders to simplify and standardize mechanical, optical, and
electrical connections.
Bridgelux
www.bridgelux.com
COB LED holders for fast lighting assembly
with reflector optics
TE Connectivity’s Lumawise Type Z LED holders provide quick
and easy mechanical and electrical connections of chip-onboard
(COB) LED arrays in
a wide variety of lighting designs.
Customers can use the
new LED holders to develop
Zhaga-compliant modules.
Low-profile versions are available,
all featuring a snap-in
retention that secures the LED
in the holder during assembly
and ensures proper positioning in the fixture. Lumawise Type
Z LED holders are now also offered with an attachment feature
for LEDIL optics, so the lighting designer can opt for beamshaping
flexibility in spot and downlight applications. A Lumawise
Type Z unit holds the COB-LED in place on the heatsink
with the help of a sticky tape mounting or LED-clamping. The
electrical connection is created without any need for soldering
– a simple poke-in wire connection suffices. Wire sizes 18 and
20 AWG can be used, solid, fused and stranded. Attachment of
LEDIL Elise optics is also simple. The high-reflectivity housing
is molded in a flame-retardant halogen- and red phosphorusfree
thermoplastic, rated V-0 under UL94. TE expects the new
LED holders to be used in a wide range of new and retrofit
interior and exterior applications.
TE
www.te.com
Spectroradiometer characterizes UV-A, B
and C radiation sources
GL Optic’s Spectis 4.0 UV spectroradiometer has been designed
for the fast verification of UV radiation in the production
environment as well as in
laboratories. The effectiveness
of UV radiation can
vary significantly with even
slightly different frequencies
of radiation. This invisible
part of optical radiation can
only be measured with calibrated
and reliable optical
measuring instruments. Increased usage of UV LEDs necessitates
applications of accessible and reliable measurement
tools. This calibrated spectroradiometer can be connected with
a small 48mm integrating sphere for radiant power measurement
of single sources or a 205mm integrating sphere for
larger modules testing. The “GL RID One UV” setup consists
of a spectroradiometer combined with a tabletop goniometer
system for measurements of the radiant intensity angular distribution.
The usable spectral working range of Spectis 4.0 starts
at 200nm. Depending on configuration, the optical resolution
FWHM could be set at 0.5nm. Dedicated thermal adjustment
allows stable readings at different application temperatures up
to 35 °C. Due to proper calibration, absolute UV spectral values
are free of stray light impact.
GL Optic
www.gloptic.com
No-light, near-infrared CMOS image sensing
for night vision
OmniVision Technologies has unveiled Nyxel 2, the second
generation of its near-infrared (NIR) technology for image sensors
that operate in low to
no ambient light conditions.
OmniVision’s R&D
team has continued to
refine its novel silicon
semiconductor architectures
and processes
to achieve new records in quantum efficiency (QE). Nyxel 2 can
now achieve 50% QE at 940nm and 70% QE at the 850nm NIR
wavelength, providing a 25% improvement in the invisible 940nm
NIR light spectrum and a 17% bump at the barely visible 850nm
NIR wavelength. These sensitivity improvements enable image
sensors to see even better and farther under the same amount of
light, further extending the image detection range. Nyxel 2-based
camera systems also require fewer LED lights, thus reducing
overall power consumption and extending battery life. Competing
CMOS approaches for NIR image sensing continue to rely solely
on thick silicon to improve NIR sensitivity. However, this results
in cross-talk and reduces the modulation transfer function (MTF).
With Nyxel 2, OmniVision has further refined its approach to NIR
imaging that combines thick-silicon pixel architectures with careful
management of wafer surface texture to improve QE, along with
extended DTI to retain the MTF levels of the first generation without
affecting the sensor’s dark current.
OmniVision
www.ovt.com
www.eenewseurope.com eeNews Europe April 2020 News 47
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/www.bridgelux.com
/www.te.com
/www.gloptic.com
/www.ovt.com
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