asteroza + array   165

Broadband lightweight flat lenses for long-wave infrared imaging | PNAS
Interesting, a nearly flat minilens (microlens?)array that covers visible and long wave IR. Called a MDL (multilevel diffractive lens)
optics  research  technology  visible  long  wave  IR  LWIR  thin  film  microlens  array  flat  materials  science  polymer  multilevel  diffractive  lens 
october 2019 by asteroza
Electric Sky
Some sort of wizardry allows new highly spare arrays for RF power beaming, for medium ranges (looking at 1000km or less), which causes beam refocusing. All solid state, looking at 915MHz UHF.
external  power  beaming  wireless  transmission  transfer  space  propulsion  RF  UHF  whisper  refocus  sparse  array 
april 2019 by asteroza
low weight phased array radar built on a metamaterial flat panel
metamaterial  transceiver  phased  array  radar  materials  science  research  technology  2D 
march 2019 by asteroza
Heatworks | Reinventing the way the world heats and uses water –
So they are directly running electricity through the water, via a dynamically controlled array of graphite electrodes to manage the resistance in the circuit, to ohmicly heat the water on demand. They have guard ground electrodes to keep the thing from electrocuting you downstream.
tankless  water  heater  ohmic  array  heating 
march 2019 by asteroza
possible OneSpace phased array ground terminal antenna maker, a side project/startup by Greg Wyler
flat  panel  phased  array  VSAT  grount  terminal  antenna  telecommunications  satellite  communications  newspace 
march 2019 by asteroza
OSA | Superresolution far-field imaging by coded phase reflectors distributed only along the boundary of synthetic apertures
So you can cheat quite a bit more with optical synthetic aperture designs than previously thought. May make cubesat mirrors with photon thruster management feasible for very large apertures...
hypertelescope  telescope  optics  mirror  research  synthetic  aperture  array  coflyer  space  cubesat 
january 2019 by asteroza
StratoSolar Precedent
Interesting precedent paper in the early days of photovoltaics, describing a system very similar to StaroSolar's floating PV array.
StratoSolar  floating  PV  solar  array  ballon  tethered  research  technology  retro 
june 2018 by asteroza
ALCAN Systems : Communication is the key
phased array satellite broadband antenna, similar to kymeta (including using LCD production lines for manufacturing)
phased  array  antenna  satellite  telecommunications  hardware  electronics  devices 
may 2018 by asteroza
A Breakthrough Propulsion Architecture | NASA
Thin film solar array/solar sail powered by a long range laser feeds a lithium ion thruster
NASA  NIAC  thin  film  solar  array  laser  beamed  propulsion  hybrid  electric  ion  thruster 
april 2018 by asteroza
Programmable CNT based separation filters, possible basis for molecular manufacturing. At least it seems to deal with gas/liquids easily enough in theory for basic molecular synthesis of simple compounds. So could go from stripping CO2 and water from the atmosphere to make simple synthetic fuels like ethanol
CNT  tube  separation  filter  membrane  materials  science  research  technology  pillar  array  catalyst  NEMS 
march 2018 by asteroza
RaspberryPi shield with far field mics for voice recognition, with a FPGA to accelerate things
RaspberryPi  shield  voice  recognition  far  field  microphone  array  FPGA  IoT  hardware  electronics  devices 
january 2018 by asteroza
Fully Integrated Hybrid Silicon Two Dimensional Beam Scanner | Bowers
The underlying tech behind Strobe Inc.'s (now GM/Cruise) fancy pants chip LIDAR. Uses optical phased array for one dimensional scanning, and frequency variation through a prism lens to achieve scanning in the other dimension, rather than a full 2D optical phased array (so easier to make?)
solid  state  hybrid  chip  LIDAR  optical  phased  array  variable  frequency  laser  prism  lens 
october 2017 by asteroza
Carbon nanotube manufacturer & product development services, US based
Making a Vantablack alternative called Singularity Black, and planning on opening up the recipe. Will also coat something for you if you send it in. Unfortunately ITAR restricted...
vertically  aligned  nanotube  array  Vantablack  black  color  materials  science  research  technology 
august 2017 by asteroza
An 8X8 Heterodyne Lens-less OPA Camera
lensless camera by using an optical phased array (in silicon photonics)
silicon  photonics  optics  research  technology  optical  phased  array  lensless  camera  OPA 
june 2017 by asteroza
Solar Power Satellites
From the guy who gave us HESPeruS, a new shape for an SPS that appears to be more flexible in orientation...
CASSIOPeiA  SPS  SSP  microwave  phased  array  solar  power  helix  heliogyro  molniya  orbit  Delicious 
june 2017 by asteroza
Echodyne | Metamaterials-Based Radar Technology
Using metamaterials, they've built up sub-half wavelength antenna arrays for a phased array radar at small scale, with spacing so small that they don't need expensive/heavy/powerful phase shifters to beam steer.
small  form  factor  metamaterial  antenna  phased  array  radar  UAV  drone  sense  avoid  hardware  electronics  devices  RF  beam  steering  Delicious 
november 2016 by asteroza
Kepler Communications |
Trying to build an orbital backbone for smallsats, to gather comms to larger high bandwidth birds. Sounds like MIMO phased array antennas?
satellite  constellation  orbital  space  communications  backbone  infrastructure  smallsat  network  MIMO  antenna  phased  array  RF  link  Delicious 
july 2016 by asteroza
Dense dislocation arrays embedded in grain boundaries for high-performance bulk thermoelectrics
Squeezing a liquid metal laden alloy/crystal grain mix during sintering produces zT = 2.1 thermoelectric bulk alloys.
dislocation  array  suqeezed  crystal  grain  boundary  thermoelectric  bulk  metal  alloy  manufacturing  production  materials  science  research  technology  Delicious 
april 2015 by asteroza
Optics InfoBase: Optica - Optical Fourier synthesis of high-repetition-rate pulses
I think this is using an array of (continuous wave?) lasers constructively interfering to create a specific custom laser pulse waveform.
arbitrary  pulse  laser  wave  waveform  shaping  optics  research  technology  shape  array  Delicious 
january 2015 by asteroza
Adaptive Free Space Optical Communication Systems | Optonicus
Interesting that than can sort of get away from having monster telescope optics...
laser  communication  lasercomm  fiber  array  collimator  adaptive  optics  Delicious 
january 2015 by asteroza
Adaptive Fiber Array Technology | Optonicus
DARPA Excalibur laser program using these fiber laser modules, which have neat beam steering properties
DARPA  excalibur  intelligent  fiber  array  adaptive  optics  laser  module  research  technology  beam  steering  collimator  coherent  Delicious 
january 2015 by asteroza
Wave Energy :: ALBATERN :: WaveNET
Interesting wave energy power generator design, using linkable modules. Similar to pelamis, but all the hydraulic piston stuff is done underwater it seems.
waveNET  modular  pneumatic  pump  wave  motion  power  generator  marine  renewable  green  energy  research  technology  array  hydraulic  structure  ocean  Delicious 
november 2014 by asteroza
Short-Range, Wide Field-of-View Extremely agile, Electronically Steered Photonic Emitter (SWEEPER)
DARPA doing work on an electronically scan steered phased array of laser emitters,aka the optical equivalent AESA phased array radar. Which is AWESOME.
DARPA  phased  array  steered  photonic  emitter  laser  optics  research  technology  infrared  IR  integrated  circuit  Delicious 
august 2014 by asteroza
[1312.4006] Three-dimensional Mid-air Acoustic Manipulation by Ultrasonic Phased Arrays
This has potentially manufacturing applications, if it can be used for precision placement of electronics onto PCB's without contamination if the ultrasound doesn't do any damage.
3D  midair  acoustic  object  manipulation  manipulator  touchless  contactless  ultrasound  levitation  standing  wave  node  trap  physics  research  technology  manufacturing  phased  array  speaker  audio  soundwaves  Delicious 
february 2014 by asteroza
:: University of Southampton
New tricks to get fiber lasers working together in concert, with high wavelength sync. With pulse fiber lasers, the potential exists to create very high performance laser particle accelerators, with lengths measured in cm, not km. Of course, this has potential for other applications involving high power and duration lasers.
amplification  technology  hardware  optics  physics  ICAN  pulse  fiber  research  accelerator  network  particle  laser  coherent  devices  array  electronics  Delicious 
april 2013 by asteroza
The Rolling Sunlight: Solar Power on Wheels | Greenpeace
Greenpeace apparently made a truck running on biodiesel 10 years ago with a solar array/battery storage configuration, to provide portable power to disaster areas. It's currently deployed in Rockaway after Hurricane Sandy. Interesting trick, the array is made of two panels covering the box roof at an angle to the right, one sliding out to the right closer to the ground to fully deploy the array. So, park the truck so the right hand side faces due south to setup. No easy way to adjust the angle as far as I can see, which would be the most immediate needed improvement. More interesting improvement is a flat pack mount to go on top of a box truck roof, which can have adjustable tilt from flat to 45 degrees, and one or two slide out panels to increase area.
relief  disaster  generator  power  array  solar  portable  mount  truck  Greenpeace  RollingSunlight  Delicious 
november 2012 by asteroza
Researchers develop printable lasers - Research - University of Cambridge
Basically inkjet printing self organizing liquid crystal laser resonators, so you can basically print laser arrays on the cheap, onto flexible substrates. Applications for optical stealth clothing? See also
printed  photonic  array  self  organizing  chiral  nematic  liquid  crystal  resonant  cavity  laser  inkjet  printing  manufacturing  Delicious 
september 2012 by asteroza
Aberration-Free Ultrathin Flat Lenses and Axicons at Telecom Wavelengths Based on Plasmonic Metasurfaces - Nano Letters (ACS Publications)
New trick, using gold nanoantennas embedded in thin film silicon to turn a flat sheet into a near diffraction limited optical lens. Wide bandwidth too. Applicable for IR. Usable for large aperture beam expanders for a long range laser? But the demo seems to be a 1cm lens, and they are only seeing 1-10% efficiency.
film  thin  array  plasmonics  axicon  discontinuity  phase  planar  nanoantenna  gold  embedded  nanotechnology  technology  research  science  materials  physics  optics  metasurface  plasmonic  lens  flat  Delicious 
august 2012 by asteroza
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