To recognize what is written in the page of a closed book are researchers from the Massachusetts Institute of technology (USA). Helped them in this terahertz wave band and a specially written computer program for character recognition.
photo: Gennady Cherkasov
Frequency of terahertz radiation between microwave and infrared radiation. Water and metal for them an insurmountable obstacle, but through wood and paper, they are easy to pass. They absorb ink differently than paper, with the result that the idea came to test a THz – waves to read what is written in the closed book. Researchers have tested terahertz waves for letter recognition in the inverted stack of ten sheets of paper, and found that they “failed to see” is written in 9 of them. It is expected that the technology will be useful to archaeologists and historians to read old, old books that are impossible to open without damaging them.
As explained in the company “ITV”(Internet, Technology, Video), scientists have been working with teragertsovyi waves, in particular, are the scanners working on the Terahertz waves with which the doctor can layers to study the structure of internal organs, in the Russian institutions for the needs of defense long ago worked out the technology of vision through the wall”, also based on THz — waves. Know-how in this case is not in the principle of penetration of THz waves through the paper, and in a complex recognition program written on paper symbols.