Researchers at the University of Science and Technology of China have developed novel contact lenses that allow humans to see infrared light, normally invisible to the naked eye.
These lenses are infused with nanoparticles that convert near-infrared light (wavelengths of 800–1,600 nm) into visible light (400–700 nm), enabling wearers to perceive infrared flashes as visible signals.
Key features of these lenses include:
- They work even with the eyes closed, as near-infrared light penetrates eyelids better than visible light, reducing interference.
- Users can see both visible and infrared light simultaneously because the lenses are transparent.
- The lenses do not require an external power source, unlike night-vision goggles.
- Different infrared wavelengths can be converted into distinct visible colours, potentially aiding colour-blind individuals by enabling perception of otherwise invisible wavelengths.
- Current limitations include relatively low spatial resolution and the need for bright infrared sources, as the lenses do not amplify incoming light.
- Tests with human volunteers showed they could detect flashing infrared signals and determine the direction of infrared light. The technology could have applications in security, communication, rescue missions, and anti-counterfeiting.
The price
The lenses cost about $200 per pair to produce and represent a significant step towards practical wearable infrared vision without bulky equipment.
In nut shell, these innovative contact lenses convert invisible infrared light into visible signals, granting humans a form of “super-vision” that works even with closed eyes and may have diverse future uses.
