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23 January 2006 High-performance blazed GxLTM device for large-area laser projector
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A blazed GxL device is described that has high optical efficiency (>70% for RGB lasers), and high contrast ratio (> 10,000:1), and that is highly reliable when used in a large-area laser projection system. The key features were a robust design and precise stress control technology to maintain a uniform shape (bow and tilt) of more than 6,000 ribbons, a 0.25-μm CMOS compatible fabrication processing and planarization techniques to reduce fluctuation of the ribbons, and a reliable Al-Cu reflective film that provided protection against a high-power laser. No degradation in characteristics of the GxL device was observed after operating a 5,000- lumen projector for 2,000 hours and conducting 2,000 temperature cycling tests at -20°C and +80°C. Consequently, the world's largest laser projection screen with a size of 2005 inches (10 m × 50 m) and 6 million pixels (1,080 × 5,760) was demonstrated at the 2005 World Exposition in Aichi, Japan.
© (2006) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Yasuyuki Ito, Kunihiko Saruta, Hiroto Kasai, Masato Nishida, Masanari Yamaguchi, Keitaro Yamashita, Ayumu Taguchi, Kazunao Oniki, and Hitoshi Tamada "High-performance blazed GxLTM device for large-area laser projector", Proc. SPIE 6114, MOEMS Display, Imaging, and Miniaturized Microsystems IV, 611401 (23 January 2006);


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