asteroza + mirror   99

The Nautilus Array – A Galactic Search for Life
Interesting diffractive optics concept and a lightweight but large format telescope shape with associated satellite bus chassis.
diffractive  optics  lens  mirror  space  telescope  research  technology 
9 weeks ago by asteroza
Ultraefficient thermophotovoltaic power conversion by band-edge spectral filtering | PNAS
backing a TPV cell with a gold mirror ups efficiency, sorta like some lamps with parabolic reflectors throwing back light into the source if the direction is wrong.
TPV  materials  science  research  technology  power  generator  substrate  mirror 
10 weeks ago by asteroza
Photonic Crystal Research
Doing work on using photonic crystals as TPV, trapping photons in the crystal like a mirror
photonic  crystal  optics  TPV  materials  science  research  technology  power  generator  photon  trapping  mirror 
10 weeks ago by asteroza
Using a silicon chip coated in nanoantennas, they effectively made a metamaterial mirror for a laser, allowing a 1D laser scanner LIDAR that is solid state. Made using methods similar to LCD manufacturing, which means the beam can be actively scanned at will, so not a fixed scanning cycle either.
LIDAR  sensor  metatmaterial  mirror  1D  scanner  beam  steering  solid  state  materials  science  research  technology 
march 2019 by asteroza
SolSource | Ultimate Solar Cookers for Cooking Anything Under The Sun
So, they apparently have a patent on a very low cost coating system to get those mirrors
solar  stove  cooking  parabolic  dish  low  cost  mirror  patent 
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
Princeton Satellite Systems | Satellites and Beyond
New fusion propulsion design that makes power and propulsion at the same time, but requires He3? If nothing else, they want to demo a brayton cycle turbine power setup on ISS.
direct  fusion  drive  space  propulsion  plasma  research  technology  mirror  magnet  power  generator  FRC 
september 2018 by asteroza
Uses indium gallium arsenide photodetectors at 1550nm for better distance/resolution, but MEMS mirrors? Now selling a $500 sensor...
LIDAR  sensor  MEMS  mirror  hardware  electronics  devices 
june 2018 by asteroza
Self-Deployed Space or Planetary Habitats and Extremely Large Structures
NIAC phase 1 results. NRO research related as well for deployable space telescopes. Rigidized UV cured polymer thin film bubbles for space applications. Possible flat primary mirrors/solar sails, but if they are making spheres, making curved mirror segments should be doable. If you use 6 stabilizing hoops as cut lines, can get 6 sphere segments without much waste (waste could be repurposed as additional mirror segments)
NIAC  NASA  deployable  space  telescope  primary  mirror  solar  sail  polymer  UV  cured  rigidizable  thin  film  structure  bubble 
april 2018 by asteroza
Interesting design, uses what looks like deployable carbon fiber tubes (which are built up from a tape deployer style?) to extend the focal length so the small primary isn't as big of an issue (1m GSD!)
newspace  space  telescope  cubesat  12U  deployable  secondary  mirror  carbon  fiber  tape  tube  earth  observation  surveillance  remote  sensing 
november 2017 by asteroza
TU Delft
Fizeau synthetic aperture deployable telescope design for a smallsat that's kinda interesting with a Y segmented mirror which features swing out mirror wing segments.
fizeau  synthetic  aperture  deployable  korsch  telescope  segmented  Y  mirror  smallsat  space  satellite  design  earth  observation 
june 2017 by asteroza
MIT technology used to shrink tumor | MIT News
Omniguide is producing high power laser fiber guides for IR lasers, for use in medical applications, using advanced hollow fibers with the hollow core coated by the new omnidirectional mirrors described here.
CO2  IR  laser  fiber  tunable  mirror  reflector  omnidirectional  materials  science  research  technology  Delicious 
november 2016 by asteroza
How to establish and boot to GPT mirrors on 64-bit Windows
You can do a boot mirror with windows software raid, but you must manually copy the EFI partition information or you will just copy the system data but not the boot loader, making you look stupid if the primary disk fails.
sysadmin  tips  tricks  windows  software  raid  mirror  boot  system  drive  howto  tutorial  reference  GPT  EFI  partition  Delicious 
march 2016 by asteroza
Mirrorcle Technologies, Inc. - Home
Makes MEMS mirrors suitable for fast tracking in a lasercomm telescope for a cubesat lasercomm.
high  speed  MEMS  mirror  active  adaptive  optics  research  technology  cubesat  lasercomm  laser  communication  Delicious 
october 2015 by asteroza
Aperture: A Precise Extremely large Reflective Telescope
Interesting concept of using hard disk write techniques to manipulate magnetic domains in a membrane mirror to do final tweaking after deployment.
NASA  NIAC  reployable  adjustable  mirror  optics  telescope  research  technology  deformable  Delicious 
may 2015 by asteroza
Passive radiative cooling below ambient air temperature under direct sunlight : Nature : Nature Publishing Group
Interesting mixed material which re-emits heat at atmospheric IR transparency windows, effectively becoming a passive cooler. So an external radiator on earth covered with this paint can get pretty cool.
photonic  radiative  cooling  solar  radiator  mirror  selective  thermal  emitter  materials  science  research  technology  passive  hafnium  silicon  dioxide  tuned  cooler  nanoparticle  layer  IR  infrared  transparency  window  atmospheric  green  paint  surface  treatment  Delicious 
december 2014 by asteroza
Patent US8224189 - Retro-directive target for free-space optical communication and method of producing the same
Offboard powered ground laser can initiate and "power" a UAV's laser data link using modulated retroreflectors. How fast you can modulate the reflected laser light defines your data rate though.
8224189  free  space  optical  communication  laser  corner  mirror  retroreflector  patent  Delicious 
june 2014 by asteroza
Deformable mirror corrects errors
Simple idea of reversing laser mirror deformation by heating the opposite side of the laser spot on the mirror with a heating element to equalize distortion more or less. Which is fine as long as you aren't at mirror melting laser heat levels...
laser  deformable  mirror  Fraunhofer  adaptive  optics  research  technology  Delicious 
may 2014 by asteroza
One Earth Designs
Apparently they have 2 patents on a 3D formable polymer mirror with 90% reflectivity (in visible/IR?)
polymer  technology  parabolic  hardware  solar  research  reflector  science  mirror  gril  gear  materials  camping  cooking  survival  cooker  Delicious 
july 2013 by asteroza
GlassUp | Much more to see
I think this uses some sort of holographic mirror lens assembly, considering one of the optics developers worked on aviation helmet display systems?
mirror  holographic  AR  indiegogo  hardware  optics  glasses  eyewear  devices  lens  eyeglasses  electronics  Delicious 
june 2013 by asteroza
Some sort of new slumped glass mirror type with fancy fire and waterjet machining, enabling 75Kg/m2 2.5cm thick 8m diameter class mirrors with active adaptive optics. If that optical cloaking stuff works out for hiding the secondary mirror, this might get really interesting.
mirror  hardware  weight  optics  8m  telescope  low  astronomy  large  Delicious 
june 2013 by asteroza
ビームダウン式太陽熱集光装置( 太陽エネルギー ) - 三鷹光器株式会社
Interesting beam down double reflector/concentrator design, which keeps the operative focus point low to the ground. Though that does constrict your heliostat field design and sight angles, plus you will probably need to cool the upper mirror.
mirror  hardware  japan  concentrator  downward  generator  power  solar  double  heliostat  reflector  design  Delicious 
march 2013 by asteroza
Re-Envisioning the Telescope
Interesting way of making huge primary telescopes, using holographic sheet diffraction ratings, suitable for space telescopes. I wonder if the reverse works, shining a high power laser back out the scope to achieve a wide aperture primary.
technology  research  optics  astronomy  lens  mirror  objective  primary  telescope  grating  diffraction  sheet  holographic  flat  format  size  large  dittoscope  Delicious 
november 2012 by asteroza
NASA - OCCAMS: Optically Controlled and Corrected Active Meta-material Space Structures
Wow, using photonic muscles embedded in a deployable thin film mirror, using a raster scanning laser to tweak the mirror as an active optical correction primary aperture mirror by using the muscles to deform the mirror. But, the concept suspiciously looks similar to a stealth radar deflection cone for spysats patented by Teledyne Ryan and allegedly used on Misty 1/2 and NROL-15.
NASA  deployable  mirror  space  infrastructure  antenna  research  optics  deformable  LCE  liquid  crystal  elastomer  polymer  substrate  photonic  artificial  muscle  actuator  active  metamaterial  photo-initiated  distortion  photoactive  optically  addressable  laser  molecular  neoteric  lightweight  large  form  factor  aperture  primary  telescope  thin  film  inflatable  materials  science  technology  nanotechnology  nanoactuator  nanomuscle  Delicious 
september 2012 by asteroza
Title Page
Claiming a low cost double reflector mirror arrangement lets these guys do high concentration levels. Doesn't really solve the tracking problem, at first glance, but the same plastic shape trick could be used with a trough collector. Interesting that they use a clear plastic cover lens, but what about age or dust related degradation?
energy  green  CPVT  PVT  CPV  CSP  generator  power  solar  concentrating  reflector  mirror  double  cassegrain  Delicious 
august 2012 by asteroza
Airlight - Home
Oddball mix of inflatable mirror/lens assembly mounted on a lightweight fiber reinforced concrete frame. Essentially makes a closed, slightly pressurized container for the energy production components, to protect them from rain and air contamination. Though the ETFE film getting discolored due to age/exposure reducing power output might be a problem. The collector is universal, in the sense that the central core receiver can be either the CSP type using pressurized air for the heat transfer fluid (which nominally gets dumped through a gravel tank for heat storage), or a water cooled CPV receiver. Recently did work with IBM using IBM chip semiconductor manufacturing techniques to make CPV water cooled solar cell panels with integrated cooling in the silicon.via microchannels.
photovoltaic  linear  support  parabolic  thermal  CSP  green  assembly  trough  concentrating  CPV  solar  mirror  PV  inflatable  generator  power  energy  Delicious 
august 2012 by asteroza
A Moon-Based Telescope - Technology Review
The bit about using reactive ion etching to finalize the lunar regolith concrete mirror shape is interesting, though is that before or after they coat the mirror with sputtered aluminum?
lunar  regolith  concrete  mirror  manufacturing  technology  materials  science  research  reactive  ion  etching  Delicious 
january 2012 by asteroza
World's top solar power plan switches on
There's been rumblings about DESERTEC trying to cut out some North African countries that are "unfavorable" to certain capital agreements to bankroll powerplant construction.
DESERTEC  Morocco  Quarzazate  solar  thermal  power  generator  north  africa  green  energy  parabolic  mirror  supergrid  Delicious 
november 2011 by asteroza
NREL: News Feature - Breakthrough Furnace Can Cut Solar Costs
Interesting tricks to use the material properties of solar cells to ease the burden of heating them during manufacturing, increasing efficiency and lowering power and cooling requirements. The optical cavity and mirror ceramics are a good fit here, but may not be all that applicable elsewhere though.
optical  cavity  furnace  mirror  ceramic  solar  cell  semiconductor  processing  manufacturing  materials  science  research  technology  production  Delicious 
october 2011 by asteroza
RaidSonic RAIDON SR2760-2S-S2B 2.5" SATA RAID module for two HDDs
RaidSonic SR2760-2S-S2B 3.5 inch HDD form factor double 2.5 inch form factor HDD/SSD RAID enclosure/case/shell/adapter device. Handy way to mirroring a small boot drive and not blowing RAID ports on it. Might be usable on Nexenta, since if it is doing RAID, it won't be a simple port multiplier.
hardware  RAID  raid0  RAID1  stripe  mirror  3.5  3.5inch  module  2.5  2.5inch  hard  drive  SSD  adapter  case  housing  shell  electronics  devices  Delicious 
august 2011 by asteroza
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