A new class of hybrid laser-phosphor projectors uses multiple blue direct-diode lasers to create blue light and to stimulate phosphors that emit red and green light. Generated via fluorescence, the red and green light from the phosphors lacks the properties associated with laser light (e.g., monochromatic, coherent, low etendue, etc.) and therefore should not be treated as laser light when determining the laser-safety rating of these projectors. Considering only the blue laser light, the maximum lumen output for a Class-3R laser-phosphor projector is calculated. In addition, the dependence of laser-safety classification on key projector parameters, including apparent source size, lens throw ratio, and microdisplay-panel size, is investigated.
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ILSC 2013: Proceedings of the International Laser Safety Conference
March 18–21, 2013
Orlando, Florida, USA
ISBN:
978-0-912035-97-0
PROCEEDINGS PAPER
Potential brightness of class 3R hybrid laser-phosphor projectors
Rob Christensen
Rob Christensen
Aloes Technology, Inc.
, Jackson, Wyoming, 83002, USA
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Published Online:
March 01 2013
Citation
Rob Christensen; March 18–21, 2013. "Potential brightness of class 3R hybrid laser-phosphor projectors." Proceedings of the ILSC 2013: Proceedings of the International Laser Safety Conference. ILSC 2013: Proceedings of the International Laser Safety Conference. Orlando, Florida, USA. (pp. pp. 173-179). ASME. https://doi.org/10.2351/1.5056788
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