19.06.2025, 09:42
A powerful and long-lasting source of white light has been created in the Caucasus
Source: OREANDA-NEWS
OREANDA-NEWS A compact and durable white light source for car headlights and spotlights was created and patented by NCFU scientists. This was reported in the press service of the university.
According to the university's experts, the key element of the developed device is luminescent ceramics, a material that can "turn" the light falling on it into radiation of a different color.
The university emphasized that in addition to its small size, the new device differs from its analogues in the uniformity of radiation. During operation, the new spotlight emits light of the same color temperature over the entire area, converting "blue" light into "white" light, which is most suitable for the railway, automotive, shipbuilding and stage performance spotlights.
As a blue-to-white converter element, scientists chose cerium (Ce) atoms, which, under the influence of blue radiation, emits a wide light spectrum, including green, yellow and red components.
What makes the light "white" is the mixing of the reflected radiation from the initial blue laser and the radiation emitted by the converter, said Vitaly Tarala, head of the Research Laboratory for Advanced Materials Technology and Laser Media at the NCFU Faculty of Physics and Technology's Clean Zones Research Laboratory.
"For stable operation of the device, it is necessary to cool the light converter. Part of the energy of the absorbed exciting radiation is converted into heat, which, when accumulated, begins to extinguish the luminescence. When using ceramics, unlike the phosphor layer, the heat can be distributed more evenly in the converter, and then removed using a cooling circuit. In this development, a converter based on yttrium-aluminum garnet doped with cerium is presented in the form of a cone," he explained.
According to the university's experts, the key element of the developed device is luminescent ceramics, a material that can "turn" the light falling on it into radiation of a different color.
The university emphasized that in addition to its small size, the new device differs from its analogues in the uniformity of radiation. During operation, the new spotlight emits light of the same color temperature over the entire area, converting "blue" light into "white" light, which is most suitable for the railway, automotive, shipbuilding and stage performance spotlights.
As a blue-to-white converter element, scientists chose cerium (Ce) atoms, which, under the influence of blue radiation, emits a wide light spectrum, including green, yellow and red components.
What makes the light "white" is the mixing of the reflected radiation from the initial blue laser and the radiation emitted by the converter, said Vitaly Tarala, head of the Research Laboratory for Advanced Materials Technology and Laser Media at the NCFU Faculty of Physics and Technology's Clean Zones Research Laboratory.
"For stable operation of the device, it is necessary to cool the light converter. Part of the energy of the absorbed exciting radiation is converted into heat, which, when accumulated, begins to extinguish the luminescence. When using ceramics, unlike the phosphor layer, the heat can be distributed more evenly in the converter, and then removed using a cooling circuit. In this development, a converter based on yttrium-aluminum garnet doped with cerium is presented in the form of a cone," he explained.
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