asteroza + optical   160

Doing what you love doing… | dmtechtalk
So guy built a custom long range optical morse code telegraph for some dude on a RaspberryPi, as the usual smartphone app ones ultimately didn't provide the needed range. Guy does custom hardware projects as well?
RaspberryPi  long  range  optical  morse  code  telegraph  custom  hardware  electronics  devices 
7 weeks ago by asteroza
So, fun thing Bloomberg did years ago, the B-Unit...
An updated generic version of the B-Unit as a yubikey alternative would be interesting...
bloomberg  security  card  2FA  private  key  optical  hardware  electronics  devices 
july 2019 by asteroza
Lumedica
low cost optical coherence tomography using a ring pattern
optical  coherence  tomography  OCT  scanner  imager  sensor  optics  materials  science  research  technology 
july 2019 by asteroza
Signify launches Trulifi | Signify Company Website
The 150 Mbps suggest the wired backhaul might be PLC and not PoE?
Trulifi  LiFi  Philips  optical  wireless  network  networking  hardware  electronics  devices 
june 2019 by asteroza
Database of Observation Satellites
Listing commercial/gov sats, film canister sats after 2000. University stuff not listed
remote  sensing  earth  observation  satellite  database  reference  information  commercial  government  optical  IR 
april 2019 by asteroza
Optical cooling achieved by tuning thermal radiation
optical cooling by sticking two objects less than the wavelength of thermal radiation from each other
optical  cooling  photodiode  materials  science  physics  optics  research  technology 
february 2019 by asteroza
Axelspace
Todai grad extending a todai optical remote sensing smallsat (hodoyshi) design for commercial use.
japan  newspace  smallsat  optical  remote  sensing 
december 2018 by asteroza
Angular-momentum nanometrology in an ultrathin plasmonic topological insulator film | Nature Communications
New detector size of normal laser detectors can now detect "twist" of light, to add new encoding dimension for data compression on optical fiber
CMOS  optical  angular  momentum  plasmonic  nanometrology  topological  insulator  materials  science  optics  research  OAM 
october 2018 by asteroza
Wearable MRI
Using sound somehow to redirect infrared light to allow internal imaging like an MRI. Uses some sort of holographic imaging technique.
infrared  IR  optical  scanning  MRI  medicine  health  portable  hardware  electronics  devices  holographic  imaing  sound  focus  optics 
august 2018 by asteroza
Mynaric – Connectivity for the skies and beyond
air-to-air mesh, air-to-ground via gateway terminal, and air-to-space. Plus allegedly supplying StarLink/SpaceX, as well as Facebook's drones
space  lasercomm  freespace  optical  laser  communication  aviation  aircraft  satellite 
july 2018 by asteroza
UHD Video Transmission Over Bidirectional Underwater Wireless Optical Communication - IEEE Journals & Magazine
Uses green laser for downlink/primary data, blue for uplink/feedback for compensating for poor water clarity
underwater  laser  communications  lasercomm  UWOC  optical  blue  green  adaptive  link  research  technology  video 
may 2018 by asteroza
OSA | Achieving cryogenic temperatures in deep space using a coating
FISO briefing has more, but a pressed powder of BaF2 used for tank coating and thermal standoffs for a LOx tank in space might allow storage of LOx without a crycooler (with the risk of LOx freezing out in deeper space!) due to reradiation
BaF2  heat  rejection  optical  surface  coating  thermal  management  cyrogenic  materials  science  research  technology  tank  space 
january 2018 by asteroza
Audacy
MEO constellation for data relay from sats (think commercial TDRS for cubesats), not a telecoms constellation per se...
MEO  satellite  constellation  data  relay  optical  lasercomm  space  newspace 
november 2017 by asteroza
Geometric Design of Scalable Forward Scatterers for Optimally Efficient Solar Transformers - Kim - 2017 - Advanced Materials - Wiley Online Library
Mimicking iridocyte cells on clam mantles to make lightpath pillars to feed algae clusters with light, with implications for algae bioreactors using piped light for making biofuels.
iridocyte  biomimicry  nanoparticle  microbead  pillar  materials  science  optical  research  technology 
november 2017 by asteroza
Phys. Rev. Lett. 106, 162501 (2011) - Proposal for a Nuclear Gamma-Ray Laser of Optical Range
Interesting concept for an externally pumped nuclear gamma ray/vacuum UV optical range laser
nuclear  physics  research  gamma  ray  nucleon  light  optical  UV  laser 
november 2017 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
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
Laser Light Communications
All optical lasercomm MEO constellation, to operate as a "space cable" backhaul for datacenters.
lasercomm  laser  communication  optical  freespace  MEO  space  satellite  constellation  network  Delicious 
november 2016 by asteroza
A carbon nanotube optical rectenna : Nature Nanotechnology : Nature Research
New demo of optical rectennas, pushing antenna into diode, functioning as a petahertz recitifier
CNT  carbon  nanotube  diode  optical  rectenna  physics  materials  science  research  technology  power  generator  solar  Delicious 
november 2016 by asteroza
Datenübertragung per Laser: Bestmarken geknackt
10Km terrestrial lasercomm link at 1.72 Tbps, so conditions are roughly equivalent to a ground-to-orbit lasercomm link
DLR  Fraunhofer  EU  europe  germany  space  communications  freespace  optical  networking  laser  lasercomm  research  Delicious 
november 2016 by asteroza
Projects | Made In Space
Manufacturing ZBLAN optical fiber in space appears to be potentially fantastically profitable, enough to justify launching a Bigelow BA330 and 6 SpaceX Dragon flights per year.
space  manufacturing  ZBLAN  optical  fiber  production  microgravity  3D  printing  fabbing  printer  fabber  zeroG  Delicious 
august 2016 by asteroza
BridgeSat - Satellite data bandwidth ground station network
New commercial smallsat lasercomm terminals for smallsats, plus a ground receiver network? Now teaming with Boeing for the ground network buildout...
lasercomm  space  laser  communication  communications  hardware  electronics  devices  satcom  terminal  smallsat  cubesat  optical  ground  receiver  network 
august 2016 by asteroza
OSA | Luminescent detector for free-space optical communication
Facebook improving fresspace lasercomm receivers by doping optical waveguides with frequency shifter dyes to catch scintillation diffracted laser light for a wide field of view.
scintillation  effect  compensation  flourescence  flourescent  dye  doping  luminescent  concentrator  optical  fiber  wave  guide  waveguide  detector  large  FoV  optics  materials  science  research  technology  facebook  freespace  laser  communications  lasercomm  receiver  Delicious 
july 2016 by asteroza
LightCense | Visual Identification System for Drones / UASs
Some sort of light code (not quite morse if colors are involved) for broadcasting drone ID
LED  light  signal  UAV  drone  ID  identification  transmit  hardware  electronics  devices  safety  code  broadcast  optical  semaphore  Delicious 
july 2016 by asteroza
Efficient plasmonic emission by the quantum Cerenkov effect from hot carriers in...
Using electric driven "optic booms" to make light from electricity via plasmons. Sorta like constructive interference from sonic booms.
graphene  optics  physics  materials  science  research  technology  electric  optical  boom  light  plasmon  Delicious 
june 2016 by asteroza
AOptix ULL3000 | Anova Technologies
Formerly AOptix hardware, which is a freespace optical communication/RF hybrid telecom link system. Uses an advanced lasercomm terminal with adaptive optics originally developed for military aircraft to ground links.
freespace  free  space  optical  communication  lasercomm  adaptive  optics  hardware  electronics  devices  Delicious 
march 2016 by asteroza
New laser-based aircraft tracking system could aid disaster relief efforts - EPSRC website
Some sort of LCD shutter reflector to reduce transmission power requirements for one side of the link?
laser  freespace  free  space  optical  communication  lasercomm  UAV  drone  semipassive  reflector  optics  research  technology  Delicious 
march 2016 by asteroza
Hyperion Project
Some sort of LCD shutter or modulated quantum well retroreflector to reduce transmission power requirements for one side of the link?
laser  freespace  free  space  optical  communication  lasercomm  UAV  drone  semipassive  reflector  optics  research  technology  hologram  lens  MQW  modulated  quantum  well  retroreflector  reflector  Delicious 
march 2016 by asteroza
A shape-anisotropic reflective polarizer in a stomatopod crustacean : Scientific Reports
Mantis shrimp have optical structures that manipulate light across the structure rather than by depth in conventional polarizers, allowing polarized optical communication.
shrimp  optical  communication  biomimicry  light  polarizer  structure  physics  materials  science  research  technology  biology  tuned  biophotonic  photonic  Delicious 
february 2016 by asteroza
A carbon nanotube optical rectenna : Nature Nanotechnology : Nature Publishing Group
Whoa, looks like they solve the diode problem in visible light spectrum optical rectennas using a diode made up of a pointy nanotube and a non-pointy tunnel. Now to get the efficiency up...
optical  rectenna  tunnel  diode  carbon  anotube  materials  science  opticsresearch  technology  nanotechnology  semiconductor  power  generator  solar  Delicious 
september 2015 by asteroza
RiT Optical Wireless
Almost wifi, in the sense that you don't need to rewire the whole office, but you still get wired ethernet performance and security, at least until some dumbass steps in front of the laser...
office  freespace  optical  networking  network  laser  IR  hardware  electronics  devices  wireless  Delicious 
june 2015 by asteroza
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