The Liquid Crystal Variable Focus Glassess Will Open The Door To Intelligentized Glasses
Tom Cruise used a series of high-tech glasses with camera, transmitting the image and displaying confidential informations in the movie “Mission Impossible”. Now, a similar high-tech glasses will bring good news for millions of visually impaired people. U.S. scientists have developed a liquid crystal optical zoom. You can change the focal length to obtain a better than normal vision simply by adjusting the knob on the frame. Scientists predicted that this technology will open the door to develop intelligent glasses. This latest technology is the invention of the University of Arizona USA and it has now been delivered to the state Academy of Science for invention identification.
The biggest difference between liquid crystal glasses and ordinary eyeglass frames is on the lens. The lenses of myopia lens on the market currently or hyperopia mirror are mostly solid glass and resin, which means that they will have only a fixed focal length. If the visual acuity is getting better or worse, the user would have to buy new lens. And the lens of liquid crystal prescription sunglasses was composed by two ultra-thin glass-coated crystalline liquid. The crystal is exactly the same as those on the computer screen. Through changing the strength of current flowing through the liquid crystal, the crystal molecules can be re-arranged thereby to change the crystal’s transparency and focusing ability.
In the identification thesis, the crystal in the lens is a concentric structure. When the feeble current flows through the lens, the crystal in the lens will shrink or swell in less than one second. Thus, the thickness of the crystal layer will be altered so as to change the focus.
In the trial, the model wearing such glasses can not clearly see the picture in front of 30 cm. The model can see it clearly at last by adjusting the knob on the frame, so that the focal length of liquid crystal glasses changed. Such glasses have also achieved good effect in the test for ordinary people.
Scientists predict that one day in the future, this technology may replace all glasses that remedy visual impairment. By adjusting the current strength, the liquid crystal of the lens can transform a variety of different focal length effects. This means it is able to freely transfer between nearsighted glass and farsighted glass. It is a plain mirror when the current of the lens was closed and the liquid crystal formed a even thickness.
Inventor believes that this technology will at least replace the current widespread use of bifocal glasses. In addition, glasses manufatured by this technology will particularly be suitable for drivers to increase the driving safety in the future. If it is combined with the automatic control technology, it is of no need for new products to manually adjust and become a real intelligent eyeglasses.
