Sony Corp. and Sumitomo Electric Industries Ltd. have jointly developed the world’s first green laser diode that could lead to more compact video projectors and improve the displays of smart phones, the companies said.
The development of the green laser diode completes the three primary colors for red-green-blue (RGB) laser light sources.
Semiconductor lasers are created by passing electric currents through specific metallic crystals.
Until now, red lasers had been converted through the crystals to produce green laser light.
By cutting the crystals at specific angles of orientation, however, the companies developed laser diodes capable of emitting green light.
Sony is considering applying the technology to its high-performance laser projection devices, as well as its smart phones and video cameras.
Green lasers that do not require additional crystals will enable companies to produce smaller projectors, the companies said.
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