Skip to main content

MIT scientists makes use of terahertz waves to read closed books

 some Scientists, have invented a new technology that can read the pages of a closed book, an advance that may help archaeologists look into antique books without touching them.
Researchers, including Ramesh Raskar from Massachusetts Institute of Technology (MIT) in the U.S, tested a prototype of the system on a stack of papers, each with one letter printed on it. The system was able to correctly identify the letters on the top nine sheets.
“The Metropolitan Museum in New York showed a lot of interest in this, because they want to, for example, look into some antique books that they don’t even want to touch,” said Barmak Heshmat, a research scientist at MIT.
He said that the system could be used to analyse any materials organised in thin layers, such as coatings on machine parts or pharmaceuticals.
Researchers from MIT and Georgia Institute of Technology developed the algorithms that acquire images from individual sheets in stacks of paper, and interprets the often distorted or incomplete images as individual letters.
“A lot of websites have these letter certifications (captchas) to make sure you’re not a robot, and this algorithm can get through a lot of them,” said Mr. Heshmat.
The system uses terahertz radiation, the band of electromagnetic radiation between microwaves and infrared light, which has several advantages over other types of waves that can penetrate surfaces, such as X-rays or sound waves.
Terahertz frequency profiles can distinguish between ink and blank paper, in a way that X-rays can not, and has much better depth resolution than ultrasound.
The system exploits the fact that between the pages of a book tiny air pockets are trapped about 20 micrometres deep.
The difference in refractive index — the degree to which they bend light — between the air and the paper means that the boundary between the two will reflect terahertz radiation back to a detector.
In the new system, a standard terahertz camera emits ultrashort bursts of radiation, and the camera’s built-in sensor detects their reflections.
From the reflections’ time of arrival, the algorithm can gauge the distance to the individual pages of the book.
Terahertz imaging is used on a stack of paper. Photo: Barmak Heshmat/MIT
Terahertz imaging is used on a stack of paper. Photo: Barmak Heshmat/MIT
published in the journal Nature Communications.

Labels:

Comments

Post a Comment

We love comments. Show US Some love

Popular posts from this blog

CHINWE(the life of a ghetto girl)Episode 1(18+)

A bucket was kicked violentlyaway from the line that hadbeen formed by the side of thewell. There was outrage.Voices were raised and a fewbodies were shoved in anger.This scenario played out almostevery morning and the residentsof inland street were used to the fracas. In the huge melee, Ironegot down to work briskly. Hedunked the small bucket used todraw water from the well andbegan to fill his many bucketsand basins, while Gbenga and Sesan tried to calm down thewarring parties. A few, veryobservant girls had keyed intoIrone’s train of thought anddeftly jumped the queue to getwater. One was those girls, was called Chinwe… Popularly knownas chi-chiChinwe was the hottest bitchon Koso street. Her beauty wasnot measured by her face,stature, brains, height, skin color or other such criteria.Chinwe's beauty was strictlymeasured by the activeness andactivity of her vagina.Her father had been stripped offhis manliness when he lost his job as a Hotel Manager in a No-Star, barely-above-a...
1 comment
Read more

best-reasons-why-marijuana-could-be an-options-to-people-being-addicted-with-alcohol-and-narcotics-drugs

Using marijuana could help some alcoholics and people addicted to opioids kick their habits, a UBC study has found. drugs addict can rely to marijuana   "Research suggests that people may be using cannabis as an exit drug to reduce use of substances that are potentially more harmful, such as opioid pain medication," said the study's lead investigator Zach Walsh, associate professor of psychology at UBC's Okanagan campus. have you read this ? a false belief about menopause This comprehensive review of research on medical cannabis use and mental health also found some evidence that cannabis may help with symptoms of depression, PTSD and social anxiety. However, the review concluded that cannabis use might not be recommended for conditions such as bipolar disorder and psychosis. "In reviewing the limited evidence on medical cannabis, it appears that patients and others who have advocated for cannabis as a tool for harm ...
Post a Comment
Read more

Referees add more extra time when the big teams are losing

the facts which shows how football referees add more time when big teams are losing soccer (football) fans suspected it, however now facts is confirming it. After analysing all the suits of the Spanish league "la Liga" from the 2014-2015 season,  specialists in sports technology have observed that the extra the difference on the scoreboard, the less stoppage time is delivered to the stop of the game. when the rating is tighter, however, referees have a tendency to feature extra stoppage time when the crew within the better department is losing. The stoppage time brought by way of the referee following the compulsory ninety mins of a football suit is used to compensate for time misplaced because of substitutions, accidents, expulsions and other incidents that stand up at some stage in the sport, but it seems as although different elements additionally play a position in step with a brand new look at. Researchers Carlos Lago, from the university of Vigo (Spain), and Maite Gó...
Post a Comment
Read more