| 摘要 |
A lighting module (1) has a base (2), a top, a longitudinal axis (A) from the base's center to the top's center, and a lateral edge surrounding the axis. Solid state light sources (3) at the base emit excitation light (11,12), having an excitation wavelength and an angular distribution centered about the axis, toward the top. A lens (4) defines the module's lateral edge, which extends from the base to the top and reflects the excitation light. A phosphor surface (5) of the module, shaped as a funnel having a wide end proximate the top and a narrow end proximate the base, receives and absorbs the excitation light, producing phosphor light (17) that exits the module through the lateral edge. The phosphor light's wavelength is greater than the excitation wavelength, and has an angular distribution at each point on the phosphor surface centered about a local surface normal with respect to the phosphor surface. |
