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In Japan, air holograms are created that react to touch

Contact hologram

Researchers from the University of Tsukuba in Japan created holograms that react to touch. For this purpose, femtosecond lasers were used that can stimulate matter to light emission, which makes it possible to form holograms with feedback.

The generated holograms are called Fairy Lights. Their maximum volume does not exceed 1 cu. centimeter, but it can be increased with the help of special optical devices. If you touch a hologram with your finger, it breaks up for a moment, but it immediately recovers as soon as the touch ends.

Contact hologram

Japanese scientists create holographic images in two ways, using a system of lenses and mirrors. The images consist of so-called plasma voxels – three-dimensional pixels, which can be compared to atoms with reference to computer technology.

The role of projectors is assigned to two ultrafast femtosecond lasers. The first generates a thousand pulses per second with a power of 7 millioules each, and the second generates 200,000 pulses per second with a power of 50 micro-joules. The plasma created by them is safer than nanosecond lasers, which can cause burns.

Lasers, mirrors and lenses necessary for the construction of a hologramLasers, mirrors and lenses necessary for the construction of a hologram

According to one of the leading specialists of the University Yoshi Ochiai, the new technology can be used for three-dimensional communication, medical training, the creation of a holographic computer keyboard, as well as video conferencing.

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