Imec unveiled a CMOS 56Gbit/s zero-IF D-band beam-forming transmitter at the IEEE RFIC Symposium in Washington. “It is a key component of a 4-way beamforming transceiver chip currently being developed by imec’s researchers,” according to the Belgian research lab. “With this technology, they aim to support the deployment of short-range wireless services at frequencies above 100GHz.” It sees Gbit/s communication ...
Cree is aiming at directional lighting applications such as spotlights, premium torches and sports lighting with the XP-G4 re-work of its XP-G series of leds, increasing energy in the beam while reducing side-spill, increasing maximum drive current, and reducing thermal resistance. Update: Lens-less ‘high-intensity’ variants were announced in January 2024 It is also harking back to now-unobtainable ‘pre-PCN’ XP-G2 leds ...
In a world where mid-power and CoBs seem to be dominating in lighting, it is refreshing to see a high-intensity 1mm die power leds appear – in this case Cree’s lens-less XLamp XP-P, which comes in the 3.45 x 3.45mm XP package. “With up to 700 lm available at max current, the XP-P enables tighter beam angles and much longer throw ...
Graphene can be sculptured by electron beams, according to researchers at Georgia Tech. Carbon atoms can be added or subtracted – and in the case of graphene oxide, surface oxygen can be used to remove carbon atoms with no additional chemicals. “By timing and tuning the energy of the electron beam, we can activate interaction of the beam with oxygen ...
French optics firm Gaggione has created two-part optical system that both colour-mixes and zooms. Called Moon, its silicone light guide collects the led’s output creating a round image at its end. If the led has multiple die – a RGBW led, for example – colours are mixed on the way to the circular surface. The aspherical beam-forming lens, also silicone, ...
Analog Devices has acquired ‘liquid crystal waveguide’ solid-state laser steering technology from Vescent Photonics. “Vescent’s innovative non-mechanical beam steering technology enables more robust integrated lidar systems that overcome many of the major drawbacks associated with today’s mechanical offerings,” said ADI, which intends to apply scanning lidar to self-driving cars. While ADI is not yet saying much about the technology, Vescent ...
NASA has revealed a technique which dramatically cuts the power consumption of Wi-Fi comms, at least at the remote terminal. Key is modifying the Wi-Fi base station to allow the transmitter of the remote terminal to be replaced by a modulated passive reflector. “In a Wi-Fi radio, 70-80% of power is consumed generating Wi-Fi signal. If you only reflect, you ...
Following research at Sheffield-based LED packaging firm Litecool, narrow beam angles from LED packages without secondary optics or reflectors look closer. The proof-of-concept device produced a beam with 50% of light in 36 degrees, and over 90% efficiency. “Most package manufacturers design their LED packages for maximum light extraction. This means as little manipulation of the light as possible and ...
If optic diameter is important, forming letter-box beams is such a struggle, that the likes of Lumileds, Cree and Osram should make some nice rectangular die. Only my opinion of course, fuelled by my attempts to make anti-dazzle bicycle lights, but I am sure designers of wall-washers and other fan-beam luminaires would soon make used of them. Osram and Lumileds ...
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