| 20090268102 | PROJECTION APPARATUS PROVIDED WITH AN ADJUSTABLE FILTRATION SYSTEM AND METHOD THEREOF FOR ADJUSTING THE COLOUR COMPONENTS OF A LIGHT BEAM - A projection apparatus is described, which is provided with a lamp generating a light beam with a plurality of spectral elements. The projection apparatus comprises at least one band-cut filter and moving means which change the position of said band-cut filter dynamically relative to the optical path of the light beam within the projection apparatus. The invention also relates to a method for adjusting the colour components of a light beam. | 10-29-2009 |
