期刊
OPTICS EXPRESS
卷 23, 期 20, 页码 26754-26768出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.23.026754
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资金
- Ministry of Science and Technology of Taiwan [MOST 102-2221-E-002-205-MY3, MOST 104-3113-E-155-001]
- National Taiwan University [104R7607-4, 104R8908]
In this paper, we have demonstrated an efficient speckle-suppressed white light source generation when a blue laser diode illuminates on a micro-vibrated phosphor paper. Both micro-vibrated and color-mixing techniques are used in this system. With only micro-vibrated technique, the speckle contrast can be reduced from about 50% to 7.4% for the scattering blue image for a 16-ms integration time. Together with color-mixing technique, mixing speckle contrast is defined for laser diode pumped phosphor and almost speckle-free result is achieved. For color temperature lower than 5000 K, almost speckle-free mixed white can be obtained even without vibration technique. (C) 2015 Optical Society of America
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