| 摘要 |
PROBLEM TO BE SOLVED: To solve such the problem that the reflective layer designed for a phosphor wheel cannot satisfy high reflection rate requirements covering all visible light spectra (400 nm to 700 nm) and the regimes (±0 to 90 degrees) of all angles of incidence (AOI).SOLUTION: An optical wavelength-converting device used for converting first waveband light includes a substrate, a phosphor layer and a composite reflection layer. The phosphor layer is disposed on the substrate, and converts the first waveband light into second waveband light. As a result, output efficiency of wide-angle and wide-spectrum light is increased. The composite reflection layer includes a first reflection layer and a second reflection layer. The first reflection layer is disposed between the substrate and the phosphor layer and adjacent to the substrate for reflecting the second waveband light so that the second waveband light is output through the phosphor layer. The second reflection layer is disposed between the first reflection layer and the phosphor layer, and adjusts the reflection spectrum of the first reflection layer, thereby enhancing the reflection rate of the composite reflection layer.SELECTED DRAWING: Figure 5 |
