28 September 2016 Efficient 3M PBS enhancing miniature projection optics
Author Affiliations +
Over the past decade, 3M has developed a number of mobile projectors, with a goal towards providing the world’s smallest, most efficient projection systems. Compact size and efficiency are required characteristics for projection systems used in mobile devices and more lately, in augmented reality systems. In this paper we summarize the main generations of 3M light engine optical designs. We present the optical architectures of four light engines, including the rationale behind the illumination designs and the projection systems. In particular, we describe various configurations relating to the 3M polarizing beam splitter (PBS) which is key to enhanced efficiency of the miniature projection systems.
Conference Presentation
© (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Zhisheng Yun, Zhisheng Yun, Timothy Nevitt, Timothy Nevitt, Stephen Willett, Stephen Willett, Dave Mortenson, Dave Mortenson, John Le, John Le, Erin McDowell, Erin McDowell, Susan Kent, Susan Kent, Timothy Wong, Timothy Wong, Gilles J. Beniot, Gilles J. Beniot, Andrew Ouderkirk, Andrew Ouderkirk, } "Efficient 3M PBS enhancing miniature projection optics", Proc. SPIE 9947, Current Developments in Lens Design and Optical Engineering XVII, 99470N (28 September 2016); doi: 10.1117/12.2240787; https://doi.org/10.1117/12.2240787


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