Reflective Diffuser for Reducing Laser Speckle and Reflective Luminescent Wheel Including Same
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United States of America Patent
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Issued Date -
Jan 23, 2025
app pub date -
Oct 8, 2024
filing date -
Oct 8, 2024
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Abstract
A diffuser for de-speckling laser light includes a transparent diffuser substrate with de-speckling microstructures disposed on or formed into a first (i.e. front) side thereof, and a reflective film coated onto an opposite second (i.e. back) side of the transparent diffuser substrate. An extinction layer may be coated onto the reflective film. An anti-reflection (AR) coating may be disposed on the first side of the transparent diffuser substrate. A luminescent wheel is also disclosed, including a disk and an optical ring secured to the disk so as to rotate with the disk. The optical ring includes at least one fluorescent segment and the aforementioned diffuser.
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