| 摘要 |
The invention relates to an illumination device for producing an illumination pattern ( 6 ) with a variable shape and luminous intensity to a target ( 5 ). The illumination device comprises at least partly translucent and light-reflecting optical piece ( 1 ), several light sources ( 3 ) producing a conical light pattern, fixed in such a manner that the position and angle of the same can be adjusted in relation to each other and/or to the optical piece ( 1 ), and an electronic control unit ( 4 ) that is electrically coupled to each light source ( 3 ) in such a manner that the intensity of the light produced by each light source ( 3 ) can be adjusted under the control of the control unit ( 4 ). The optical piece ( 1 ) is attached in such a manner that the light beams produced by the light sources ( 3 ) are arranged to propagate at least partly via the optical piece ( 1 ) to the target ( 5 ) to be illuminated. The light beams produced by each light source ( 3 ) are arranged to form a part of the illumination pattern ( 6 ) produced by means of the illumination device, the form of said illumination pattern being substantially independent of the external form of the optical piece. The invention also relates to a method for producing an illumination pattern ( 6 ) with a variable shape and luminous intensity to a target. In the method, conical light patterns are produced by means of several light sources ( 3 ), of which light patterns at least some are directed via the optical piece ( 1 ) to the target ( 5 ) to be illuminated. The shape of the illumination pattern ( 6 ) produced by means of the method is substantially independent of the external shape of the optical piece. |
