| 摘要 |
The present invention provides a compact color illumination device ( 100 ) for emitting collimated light. The illumination device comprises a reflector cup ( 102 ), a blazed diffraction grating ( 108 ) formed on the inner surface of the reflector cup, and a plurality of light emitting sources ( 110 ) positioned linearly in a focal plane of the reflector cup. Each light emitting source emits a different color of light that is incident on the blazed diffraction grating. The light emitted by the light emitting sources is reflected by the blazed diffraction grating, wherein the reflected light is collimated.
|
