| 摘要 |
An improved multi-wavelength light source is provided that may be used, for example, in a projection device. The light source includes a plurality of discrete radiation devices emitting a plurality of source radiation beams of different wavelengths. An optical relay system, such as a lens, relays the source radiation beams to a dispersive optical element, such as a prism or a grating. The dispersive optical element redirects the relayed radiation beams as a plurality of dispersed radiation beams. The optical relay system and the dispersive optical element are positioned and oriented so that the dispersed radiation beams overlap in position and angle to form a combined radiation beam that includes the wavelengths of the source radiation beams. The combined radiation beam thereby serves as a virtual multi-wavelength radiation source. The optical system provides the combined radiation beam within a predetermined area, such as an entrance pupil of an imaging lens in a projection device, to provide a high-power source of multi-wavelength radiation.
|
