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US 11,448,950 B2Granted
Combination wheel for light conversion including both phosphor segments and color filters
AssigneeMaterion Precision Optics (Shanghai) Limited
InventorsShengyuan Bai, James Li, David Zhang
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Abstract
A combination wheel is disclosed, which comprises a color filter, a reflective substrate coaxially aligned with and on a surface of the color filter, light-emitting phosphor segments of different colors on the reflective substrate, and a diffuser segment. When used with a blue laser generator and a series of a dichroic filters and mirrors, the combination wheel tunes and convert lights to be collected by a subsequent optical system.
Claims20
A combination wheel, comprising:
- a substrate that is a color filter segmented into at least three different colors;
- a reflective coating coaxially aligned with the color filter, the reflective coating being coated on a central area of a first surface of the color filter and having a central angle of less than 360° with a portion of uncoated central area of the first surface of the color filter;
- a first light-emitting phosphor segment deposited on a first sector of the reflective coating;
- a second light-emitting phosphor segment deposited on a second sector of the reflective coating;
- and
- a diffuser segment located adjacent the reflective coating, the diffuser segment being disposed on the portion of uncoated central area of the first surface of the color filter, the diffuser segment being transmissive for blue light;
- wherein the combination wheel is a single-substrate structure with no additional substrate that is reflective or that includes a reflective coating thereon.
4 more elements
A combination wheel, comprising:
- a substrate that is a color filter segmented into at least two segments of different colors and having a central angle of less than 360° whereby the color filter has a missing segment;
- a reflective coating coaxially aligned with the color filter, the reflective coating being coated on a central area of a first surface of the color filter and having a central angle of less than 360° based at least upon the color filter having the missing segment;
- a first light-emitting phosphor segment deposited on a first sector of the reflective coating;
- a second light-emitting phosphor segment deposited on a second sector of the reflective coating;
- and
- a diffuser segment located adjacent the color filter and having a radius equal to a radius of the color filter, the diffuser segment replacing the missing segment of the color filter, the diffuser segment being transmissive for blue light;
- wherein the combination wheel is a single-substrate structure with no additional substrate that is reflective or that includes a reflective coating thereon.
4 more elements
Dependencies are inferred from the claim text.