Science Fiction Dictionary
A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z

 

Terahertz Remote Sensing Detectors

Terahertz detectors make use of the part of the electromagnetic spectrum between infrared and microwave light. In theory, these sensors could see through walls, containers and clothing from hundreds of feet away, and identify the unique signatures of a wide variety of materials within.


(Terahertz detector diagram)

Two lasers at different frequencies aimed at the target together generate a plasma (basically excited, or ionized air). This plasma emits a florescence that is scattered in characteristic ways by the terahertz radiation of the material it hits. The reflection of the florescence is detectable from remote distances

The researchers have tested hundreds of different substances and created a library of terahertz spectra to compare to the signal from the target and instantly identify the material that was hit.

The researchers demonstrated that they could detect the signal from 67 feet away, the length of their laboratory space, but theoretically they could identify materials hundreds of feet or even miles away, Liu said.

Winchell Chung reminds us that E.E. "Doc" Smith describes a similar system in his 1931 novel Space Hounds of IPC. Note how the ultra-light vision system uses twin laser beams that are almost parallel

"...but the ultralight vision system is something else again. Sending the heterodyned wave through steel is easy, but breaking it up, so as to view an object and return the impulses, was an awful job and one that isn't half done yet. We see things, after a fashion and at a distance of a few kilometers, by sending an almost parallel wave from a twin-projector to disintegrate and double back the viewing wave. That's the way the lookout plates and lenses work, all over the shipó from the master-screens in the control room to the plates of the staterooms and lifeboats and the viewing-areas of the promenades."

Via Wired; thanks to Winchell Chung (who can also be followed @nyrath).

Scroll down for more stories in the same category. (Story submitted 7/12/2010)

Follow this kind of news @Technovelgy.

| Email | RSS | Blog It | Stumble | del.icio.us | Digg | Reddit |

Would you like to contribute a story tip? It's easy:
Get the URL of the story, and the related sf author, and add it here.

Comment/Join discussion ( 6 )

Related News Stories - (" Engineering ")

Thin Film Dome Protects Cities From Nuclear Blasts
'What fabric can take that kind of a load? Synthetic spider silk.' - Robert Heinlein, 1939.

Cyborg Eye Flashlight Lights Up The Room
'Foyle pressed a tooth with his tongue and the peripheral cells of his retina were excited into emitting a soft light.' - Alfred Bester, 1956.

Aeromine Technologies Rooftop Wind Energy
'...a windmill on his roof for light and heat.' - John Jacob Astor IV, 1894.

Roomba Hoovers Up More Than Dirt
'He had brought that tiny instrument to map their movements.' - Jack Williamson, 1936.

 

Google
  Web TechNovelgy.com   

Technovelgy (that's tech-novel-gee!) is devoted to the creative science inventions and ideas of sf authors. Look for the Invention Category that interests you, the Glossary, the Invention Timeline, or see what's New.

 

 

 

 

Science Fiction Timeline
1600-1899
1900-1939
1940's   1950's
1960's   1970's
1980's   1990's
2000's   2010's

Current News

San Francisco Wants ED-209, Or Maybe Robocop
'The Enforcement Droid series 209 is a self-sufficient law enforcement robot...'

Seoul Self-Driving 42dot Bus Unveiled
'Buses without drivers moved close to the curb and stopped at intervals.'

T. Gondii And The Leaders Of The Pack
'... infected males were more than 46 times more likely to become pack leaders than uninfected males.'

'Parastronaut' First Astronaut With Disability From ESA (Updated!)
'He had left Earth to get away from its gravitational field...'

MIT Self-Assembling Reprogrammable Materials
'Faster the cubes moved; faster the circle revolved; the pyramids raised themselves, stood bolt upright on their square bases...'

Mem, The All Your Memories, Super Note-Taking App
'Life experience is linearly additive, but the correlation of memory impressions is an unlimited expansion.'

Porcine Fat Cells For 3D-Printed Whole Pork Products
'I grabbed two Syntho-Steaks out of the freezer...'

LANIUS Loitering Drone Munition Scouts And Maps
'... micro-missiles proceeding at walking pace.'

Copilot Software AI Training Sued By Involuntary Contributors
'...we've promised him a generous pension from the royalties.'

Thin Film Dome Protects Cities From Nuclear Blasts
'What fabric can take that kind of a load? Synthetic spider silk.'

Mars Space Weather Alert (MSWA) System
'On the three-dimensional map at weather headquarters... the storm was colored orange.'

Thermite's Robot Firefighter
Possibly worthy of Transformers!

Fabrican Dress Sprayed Directly Onto Model On Coperni Runway
'...that might appeal to women, because by discharging from a few or a few dozen bottles a liquid that immediately set into fabrics... they could have a new creation every time.'

Israel Deploys Sharp Shooter AI-powered Robot Guns
'They lock onto the target... and do the actual shooting once the target is identified.'

Drone Loiter Munitions Now Available
'...a series of airborne loiter-drones posted on indefinite guard above.'

Amazon Blimp Parent Drone Concept
'So the parent drone carries a spotter that it launches...'

More SF in the News Stories

More Beyond Technovelgy science news stories

Home | Glossary | Invention Timeline | Category | New | Contact Us | FAQ | Advertise |
Technovelgy.com - where science meets fiction™

Copyright© Technovelgy LLC; all rights reserved.