【超人风格安全激光隐形眼镜:可从眼中释放绿色光束】

【超人风格安全激光隐形眼镜:可从眼中释放绿色光束】据外媒报道,科学家研发出一款贴纸形式可贴在隐形眼镜上的激光,戴上这种隐形眼镜装置,佩戴者眼中可以发射出长达50厘米的激光束,光束可以用数字和零编码形成光条形码,可以被安全扫描仪识别和读取。这项技术由圣安德鲁斯大学的研究小组发明,利用有机半导体聚合物制造出柔性膜激光器,最初应用于银行纸币。随着膜式激光用于可穿戴传感器和产品的商业化,眼中有激光的超级英雄将从电影和漫画走向现实生活。

Superman’s ability to shoot beams of light from his eyes has come a step closer to reality, thanks to the development of laser contact lenses.

Experts have created ultra thin stickers, which can be attached to the optical accessories to provide a new form of security verification.

These ocular devices allow the wearer to fire a laser beam from their eyes, up to 20 inches (50 cm) away.

These beams of light can be encoded with digital ones and zeroes to form a kind of light-based barcode, which could be read by a security scanner.

The technique was originally tried on bank notes more than a year ago, and they are still giving off the same security code that was applied to them.

Experts have created ultra thin stickers, which can be attached to the optical accessories (pictured) to let wearers fire a laser beam from their eyes, up to 20 inches (50 cm) away

The discovery was made by a research team at the University of St Andrews who created flexible membrane lasers around 200 nanometres deep - roughly a fifth of the thickness of the smallest bacteria - using organic semiconductor polymers.

These are similar to the films used in smartphone screens, which activate its pixels when a light source is shined onto them.

In the case of the stickers, strong light sources cause the polymer to fluoresce - giving power to the laser.

Researchers created flexible membrane lasers similar to the films used in smartphone screens, which activate its pixels when light is shined onto it. In the case of the stickers, this light source (pictured) causes the film to fluoresce and power the laser

Scientists can turn each individual sticker into a unique security tag by altering the properties of the laser they generate.

Researchers tested their laser contact lenses using cow's eyes as a substitute for human.

By shining a pulsing, blue light, onto the lens, a green laser beam was shone onto a screen 20 inches (50cm) away, according to reports in New Scientist.

Professor Malte Gather, of the school of physics and astronomy at St Andrews, said: 'In ancient Greece, Plato believed that visual perception is mediated by "eyebeams" - beams actively sent out by the eyes to probe the environment.

Scientists can turn each individual sticker into a unique security tag by altering the properties of the laser they generate. Laser emissions can be designed to show a specific series of sharp lines on a flat background, much like the digital ones and zeroes of a barcode (pictured)

The research team has tested its laser contact lenses using cow's eyes as a substitute for human. By shining a pulsing, blue light, onto the lens, a green laser beam was shone onto a screen 20 inches (50 cm) away (pictured)

'Plato's emission theory has of course long been refuted, but superheroes with lasers in their eyes live on in popular culture and comic books.

'Our work represents a new milestone in laser development and, in particular, points the way to how lasers can be used in inherently soft and ductile environments, be it in wearable sensors or as an authentication feature on banknotes.'
Experts believe these tests prove that their membrane lasers are compatible with requirements for safe operation in the human eye.

The team also demonstrated that the devices are flexible and mechanically robust, even when attached to another object.

They also showed that their optical properties do not change over the course of several months.

PhD candidate Markus Karl added: 'By varying the materials and adjusting the grating structures of the laser, the emission can be designed to show a specific series of sharp lines on a flat background - the ones and zeros of a digital barcode.

He said the findings, suggest that 'flexible organic optoelectronics' - such as the new lenses - are approaching the verge of 'large-scale commercialisation'.

The full findings were published in the journal Nature Communications.

Superman¿s ability to shoot beams of light from his eyes has come a step closer to reality, thanks to the development of laser contact lenses

http://www.dailymail.co.uk/sciencetech/article-5678835/Supermans-laser-vision-comes-step-closer-reality-thanks-light-emitting-contact-lenses.html


Comments are closed.



无觅相关文章插件