Green laser for projection

Osram’s new green laser diode turns smartphones into projectors

01.31.2019 | Business & Financial Press

Sunnyvale, Calif. – Osram Opto Semiconductors, a world leader in the optoelectronics industry, announces a new, green laser diode that enables smartphones to project brighter and sharper images. Projectors require red, green and blue (RGB) lasers for full-color projection, but green light is particularly important because the human eye is most sensitive in the green spectral range. At the same time, green lasers are the most difficult to manufacture. Previously, RGB laser projections from smartphones often had brightness issues due to the insufficient brightness of the green laser.

The PLT3 520D builds on Osram’s previous success with green lasers. At 140 mW, the new product achieves an unprecedented high pulse output for direct green laser diodes, and its typical value of efficiency increases to 8%. These improvements allow smartphones to project images that are several times larger than their device displays. The brighter the green laser shines on a surface, the stronger the projected image appears to the viewer.

The PLT3 520D offers 140 mW at 520 nm with 300 mA in pulsed mode (50% duty cycle). Up until now, the maximum limit for these components was 80 mW. The compact TO38 metal housing is also an advantage with a diameter of only 3.8 mm. The new product was specifically developed for laser projection applications that use a Micro Electro-Mechanical Systems (MEMS) scanner as the image encoder.

“Thanks to OSRAM’s long tradition and expertise in the laser sector, we have succeeded in developing the PLT3 520D, which provides exceptional performance in a compact package for a green single-mode laser,” explained Pedro Muñoz, marketing manager at Osram Opto Semiconductors. “This technology will lead to new applications in numerous industries in the near future.”

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PLT3 520C D

With 140 mW at 300 mA in pulsed mode, the single-mode laser diode has achieved unprecedented performance for a green laser.

Picture: Osram

Green laser for projection

In addition to playing smartphone videos on a flat surface, RGB laser projection can be used in vivid, large-scale projection of photos.

Picture: Osram


OSRAM, based in Munich, is a leading global high-tech company with a history dating back more than 110 years. Primarily focused on semiconductor-based technologies, our products are used in highly diverse applications ranging from virtual reality to autonomous driving and from smartphones to smart and connected lighting solutions in buildings and cities. OSRAM uses the endless possibilities of light to improve the quality of life for individuals and communities. OSRAM’s innovations enable people all over the world not only to see better, but also to communicate, travel, work and live better. OSRAM has approximately 27,400 employees worldwide as of end of fiscal 2018 (September 30) and generated revenue of more than €4.1 billion. The company is listed on the stock exchanges in Frankfurt and Munich (ISIN: DE000LED4000; WKN: LED 400; trading symbol: OSR). Further information can be found at