| 摘要 |
A lighting device ( 10 ) has a light source, a light pipe ( 28 ), two convex magnifying lenses ( 40, 60 ), and an adjusting mechanism ( 20 ) for moving the two magnifying lenses ( 40, 60 ) relative to the light source. The light emitted from the light source is dispersed and directed into the light pipe ( 28 ) by a reflector ( 26 ). The light pipe ( 28 ) transfers collimated light through the first ( 40 ) and second ( 60 ) magnifier lenses which redirects the light to produce a circular spotlight beam having uniform intensity. The size of the spotlight beam is adjusted by an adjusting mechanism ( 20 ). |
