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26 January 2009


Osram launches blue laser for micro-projectors

Osram Opto Semiconductors GmbH in Regensburg, Germany has launched a new 450nm-wavelength blue laser diode with an output of 50mW and voltage of 5.5V. The new laser has key attributes required for micro-projectors, such as small size (3.2mm height), high efficiency (0.9W/A) and what is claimed to be excellent blue light visibility. Also, as a ridge laser with high beam quality, it needs only relatively simple, small optics to shape the beam.

An optimized TO38 package makes the blue laser diode the smallest in its class, it is claimed. “Our newly developed blue laser is the next step in our quest to enable miniaturized projectors that can be fully integrated in mobile devices [such as cell phones and digital cameras],” says Dr Thomas Höfer, head of Laser Projection at Osram Opto. Mobile devices currently on the market can produce and download high-quality photos and video clips. Integrated laser projectors will enable these devices to project this content in high quality on almost any surface.

Laser projection represents the next milestone in the development of mobile devices and has a promising future in terms of integrated projection modules, Osram Opto reckons. Laser-based projection units offer extremely low power requirements and compact dimensions, while lasers also offer vibrant colors, high contrast and sharp images, irrespective of the distance over which the images are projected.

Osram Opto says that it is also developing red and green lasers for laser projection. The red laser, like the blue laser, will be designed as a direct semiconductor laser while green lasers will be implemented using frequency-doubling technique.

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