The experts have approved of a plan to read closed books. The first nine pages of the book will be identified via this method.
An imaging system that can read closed books is in the making. A prototype of the system was tested and a stack of papers had each letter inside it visible via this system.
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The top nine sheets were transparent to the system. The Metropolitan Museum was keenly desirous of utilizing this plan since they wanted to display the inside material of some very old books which they didn’t even want to touch lest the paper crumble into dust.
The plan could also be used to probe into stuff that was filed in thin layers. This stuff could include coatings on machine components and pharmacy drugs.
Algorithms that got the images from sheets in stacks of paper were calculated. Also an algorithm that lays open the individual letters on the pages was developed.
All of this is rather overwhelming technology. That is because it is almost like it will get through secret data and information. Such a program can get through the defenses of sites that are closed to the public.
Terahertz radiation is employed by the system. This radiation lies somewhere between microwaves and infrared light. It works better than other types of radiation such as x-rays and sound waves.
It is the ideal form of probing device in security screening. Each sort of chemical absorbed different terahertz frequencies. Thus each substance has a different terahertz frequency signature.
Also this radiation can distinguish between ink and white paper in a manner that x-rays simply cannot do so. Terahertz radiation is emitted in blips of energy. These short bursts make their way to the object and back to the sensor. It has a better resolution than ultrasound.
The small air pockets in between the pages of a book are employed by this radiation for its purpose. The refractive index is employed to calculate many of the results.
While most of the radiation returns to the sensor, some of it bounces between the pages of the book. Also a background humming is recorded by the instruments.
All the reflections allow the individual letters inside the book to be gauged without opening the book. After making a margin of error for any extraneous noise among the signals that are received, a pretty good map of the written material in the closed book that is put for examination can be made. At present, past a depth of 9 pages, the instrument shows signs of failure.
The findings of this research got published in the journal Nature Communications.