| 摘要 |
A multi-reflector mechanism for a LED light source comprises a LED light source (1), an outer parabolic reflector (3), an inner parabolic reflector (4) and a sliding switch (2). The inner reflector (4) is disposed within the outer reflector (4) with the focuses (31,41) of both reflectors being different points on a common axis, and the focus (31) of the outer reflector (3) being the highest one nearest to the plane of the opening of the outer reflector (3). The LED light source (1) is disposed within the inner reflector (4) and protrudes out from the vertex of the inner reflector (4) and is coaxially and adjustably disposed at or near the focus (41,31) of the inner reflector (4) or of the outer reflector (3). The light emitting angle of the LED light source is larger than the angle formed by the two points on the edge of the opening forming the diameter thereof and the focus (41) of the inner reflector (4). The sliding switch (2) is connected to the LED light source (1) for mechanically moving the LED light source (1) coaxially relative to the inner reflector (4) and the outer reflector (3) to the focus (41) of the inner reflector (4) or to the focus (31) of the outer reflector (3). |
